Showing posts with label 1981. Show all posts
Showing posts with label 1981. Show all posts

Tuesday, 28 December 2021

2021: things that didn’t quite make the cut

This year we mostly concentrated on the year ending in "1", covering gadgets and technology from 1941, 1951, 1961, 1971, 1981, 1991, 2001 and 2011. It turns out to be a decent last digit for computers, games consoles and cars in particular. But here are some of the things that were also notable that didn't get covered.

2011 saw the launch of two rival handheld gaming platforms that were evolutions of previous devices. The Nintendo 3DS had a dual display capable of displaying glasses-free 3D on an otherwise modest hardware platform, the Sony PlayStation Vita was a more powerful device but also a more traditional gaming console. Both products competed directly against each other, but it was the Nintendo that won out although the Sony did gain a dedicated fanbase.

Nintendo 3DS and Sony PlayStation Vita
Nintendo 3DS and Sony PlayStation Vita


A decade earlier, in 2001, the Nintendo GameCube was launched against the Sony PlayStation 2 and the original Microsoft Xbox. In this fight, the GameCube came in third - in quite a bruising result for Nintendo.

Skipping back another decade to 1991 we see the Commodore CDTV, a repackaged Amiga that was meant to compete against the Sega Mega Drive and Nintendo SNES. It was a failure, and helped to accelerate Commodore to its demise a few years later.

Nintendo GameCube and Commodore CDTV
Nintendo GameCube and Commodore CDTV

In the early eighties, the best place for video games was the local arcade and 1981 was part of the golden era of arcade machines. We've covered quite a few from this year, but Namco's Galaga and Atari's Tempest were both notable and were very different types of shoot-em-up. And if you fancied something different from endless slaughter, there was Taito's Qix which was more of a puzzle game where the player had to fill the screen with boxes while being chased by a mysterious electric entity.

Galaga, Tempest and Qix
Galaga, Tempest and Qix

None of this would be possible without the microprocessor, and the first commercially-available device was the Intel 4004 which was launched in 1971. Originally designed for a calculator, the 4004 could be used for a variety of other purposes. A successful line of products followed for Intel, notably the x86 series of processors used in most PCs today.

The same year saw the release of the world's first floppy disks. Originally a huge 8 inches across (and very floppy), these inexpensive and transportable storage media and their 5.25 and 3.5 inch descendants were the standard way of transferring files into the 1990s and beyond.

A decade later, the Intel 8085 and a pair of 5.25" floppies could be found in the ergonomically designed Nokia MikroMikko. Nokia Data had a series of mergers and acquisitions, first with Siemens and then ICL until finally vanishing into Fujitsu.

Intel 4004, 8" floppy disk (with 3.5" for comparison), Nokia MikroMikko
Intel 4004, 8" floppy disk (with 3.5" for comparison), Nokia MikroMikko

Nokia have made many things over their long history, including car tyres. Today you might find Nokian winter tyres on a Nissan Patrol or Toyota Land Cruiser - both these rugged and practical 4X4s were originally launched in 1951 and were heavily inspired by the wartime-era Willys Jeep.

Nissan Patrol (circa 1958) and Toyota Land Cruiser (circa 1966)
Nissan Patrol (circa 1958) and Toyota Land Cruiser (circa 1966)


If exploring in your Japanese offroader with your Finnish tyres, you probably want a good system to tell you where you actually were in the world. Today you'd use a GPS system, but that wasn't an option back in 1981 when Honda announced the world's first in-car navigation system, the Electro Gyro-Cator. Instead of using satellites, it used inertial navigation and a set of transparent maps fitted over a screen. It was bulky, expensive and of limited use, but eventually the first in-car GPS system was launched in 1990 by Mazda.

Honda Electro Gyro-Cator
Honda Electro Gyro-Cator

Stretching things out a bit more… if you found yourself off-roading in your big Japanese 4X4 with Finnish tyres in the 1970s or 1980s and you wanted to make a high-quality video recording of your journeys, the choice of professionals was a Sony U-matic recording system which was launched in 1971. Capable of capturing broadcast-quality images, the U-matic was the choice of professionals. Smaller than a traditional film camera, most units were still quite bulky and required a crew of two or three - one for the camera, one for the recorder unit and perhaps one for the microphone boom. Perhaps on your exploration into the wilderness you might want to pack some supplies, and there's a good chance that these might include Heinz Baked Beans, a staple of tinned food since 1901. Luckily the Japanese make some of the best can openers in the world too..

Sony U-matic in a carry bag and Heinz Baked Beans
Sony U-matic in a carry bag and Heinz Baked Beans

Image credits:
Nintendo 3DS: Evan-Amos via Wikimedia Commons - CC0
PlayStation Vita: Evan-Amos via Wikimedia Commons - CC0
Nintedo GameCube: BugWarp via Wikimedia Commons - CC BY-SA 4.0
Commodore CDTV: Patric Klöter via Wikimedia Commons - CC BY-SA 3.0
Tempest: Russell Davies via Flickr - CC BY-NC 2.0
Galaga: David via Flickr - CC BY-NC-ND 2.0
Qix: Joho345 via Wikimedia Commons - CC BY-SA 3.0
Intel 4004: Simon Claessen via Flickr - CC BY-SA 2.0
8" floppy disk: Michael Holley via Wikimedia Commons - CC0
Nokia Data MikroMikko: Nokia
Nissan Patrol (1958): Sicnag via Flickr - CC BY 2.0
Toyota Land Cruiser (1966): Sicnag via Flickr - CC BY 2.0
Electro Gyrocator: Honda
Sony U-matic: Joybot via Flickr - CC BY-SA 2.0
Heinz Baked Beans: Ian Kennedy via Flickr - CC BY-NC 2.0



Friday, 17 December 2021

BBC Microcomputer (1981)

Introduced December 1981

If you were to make a shortlist of microcomputers that epitomised the very peak of 8-bit technology, then the BBC Micro would probably be part of that list, especially if you were British. Pushing the limits of what was possible, the BBC Microcomputer (often just referred to as the “Beeb”) introduced several features that were considerably more advanced than rivals and produced a series of machine that were available – in one form of another – for 13 years, leaving behind a lasting and arguably world-changing legacy.

BBC Microcomputer
BBC Microcomputer


The story starts in the late 1970s in the wake of the launch of the Apple II, TRS-80 and Commodore PET – three computers that made computing relatively affordable and simple, and which challenged traditional large-scale computers used in big businesses. It wasn’t just on the desktop either, microprocessors were finding their way into everything and it seemed very likely that the 1980s was going to be a digital age – one that both the British government and the BBC thought the country was ill-prepared for.

The BBC set out to educate the masses, in line with its public service charter. This idea became the BBC’s Computer Literacy Project, and at the heart of the project was an idea to teach people how to use a computer – which for practical purposes would concentrate on a single model of machine.

But which to choose? It needed to be a British company ideally, and there were several to choose from. Promising systems had been developed by Tangerine, Research Machines, Sinclair, Acorn, Nascom and Transam… but the BBC chose Newbury Laboratories and their still-under-development microcomputer which later became the Grundy NewBrain.

The NewBrain itself has an interesting history, but it didn’t become the BBC Micro. Production problems meant that the computer wasn’t going to be ready for sale in the BBC’s timescale so instead they approached Acorn who had achieved some success with their 6502-based Atom machine. Acorn were already working on a replacement for the Atom, called the Proton.

Despite being only a few years old, Acorn had quite a lot of development under its belt. In addition to the Atom, they had a range of Eurocard systems that offered expandability and reliability, but at a price. The Proton would be an expandable and fast system, but when the BBC approached Acorn it was only a paper design but a frantic effort managed to create a prototype which was stable enough to show the BBC… who were impressed. Acorn were offered the contract, subject to some design changes.

The Proton pushed the 6502 processor to 2MHz, twice that of the competition. Paired with fast memory sourced from Hitachi and some clever circuitry to make everything work at these breakneck speeds, the Proton was no slouch. Internal memory was a maximum of 64 kilobytes, 16Kb of ROM was the operating system, another 16Kb of ROM was BASIC or any other application that could be loaded from the four ROM sockets on the board, leaving 32Kb of RAM (on the Model B) which was shared between the computer’s workspace, graphics and the rest could be used for programs and data.

There wasn’t a lot of RAM in the machine as the 6502 could only address 64Kb of total memory, and half of that was the system’s ROMs on this machine. Futhermore high-resolution graphics could take up 20Kb of the 32Kb of RAM, and with about 6Kb of RAM as the computer’s own working area this could mean that less than 6Kb was available for the user. This wasn’t a lot and it would have badly impacted the usefulness of the machine. Worse still, 32Kb of RAM was a feature of the more expensive Model B where the cheaper Model A had just 16Kb which was not even enough to display high-resolution graphics.

However, the BBC insisted that any machine they were to commission needed to be able to display Teletext, and Acorn had already implemented this in some of its machines using a Mullard SAA5050 chip. This gave 40 column text and rudimentary block graphics while taking up just 1Kb of the precious RAM. Known as display “Mode 7”, this feature became a key part of the BBC Micro’s success.

Then there was expansion. The Model B had lots of ports – on the back were three types of video output, a serial port, cassette interface plus an analogue-to-digital port plus an optional Econet network interface. Underneath were more ports that used a ribbon cable connection – a parallel port, a connector for the optional floppy disk drive plus a power output and then a user port, 1MHz bus port and a clever interface called the Tube. Apart from the floppy disk and network ports, everything was included in the BBC Model B as standard.

The Model A was based on the same board as the Model B, but lacked a lot of the interfaces. It was possible to add them in though, but this required some work with a pile of components and a soldering iron. Upgrading either model to a floppy disk drive or Econet required opening up the machine and plugging in some new components too.

With all of these interfaces you could hook the BBC up to just about anything, assuming you had the right cables, including lab equipment, joysticks, mice, modems, printers, Teletext and Viewdata adapters and more. You could do that with other computers too, but the Tube interface was something different again.

Acorn built the system to be expandable, and the Tube was a way of connecting a second processor to the BBC. This wasn’t a coprocessor, these units essentially took over and reduced the BBC Micro itself to handling input and output only. These processors could be anything at all – Acorn (eventually) provided a 6502 or Z80 (both with 64Kb of their own RAM) and a National Semiconductor 32016 with up to 1MB of RAM. Other companies produced other second processors too, including the Motorola 68000 or Intel 8088. Because the work was now split between two computers, these solutions could be both fast and made lots of RAM available. Although none of these add-ons were very common, they did offer a lot of power for the price.


BBC Micro with Teletext Adapter and Second Processor
BBC Micro with Teletext Adapter and Second Processor


Mostly though, BBC setups were more modest. Typically paired with one or two 5.25” floppy disks (which could cost as much as the computer), a printer and a TV (or if you were lucky a Microvitec Cub monitor). They were versatile machines for small businesses, were pretty good for games (although the lack of RAM was always a problem) but most of all they succeeded in education where their robust design and wide variety of software made them the most common computer in schools at the time.

The built-in BASIC was also very fast and allowed structured programming, becoming a popular platform for bedroom coders who would then take their skills out into the real world when they started careers in IT.

Games were always a bit of a problem – compared to the rival Sinclair Spectrum and Commodore 64, the lack of RAM meant porting popular games from those platforms difficult or impossible. But in 1984, Acornsoft announced Elite - – space trading gaming the capitalised on the strengths of the BBC. In Elite, the player flies a spaceship flying through an impressively rendered 3D space environment with wire frame graphics with hidden line removal. The galaxy the player is in is procedurally generated, a semi-random technique that allows for a great variety of locations but with little memory used. Elite had a clever trick of managing to display two screen modes at the same time – something regarded as impossible – giving high-resolution black and white 3D at the top and a more colourful status bar at the bottom.

Elite


Upgraded versions of the BBC followed, the Model B+64 and B+128 adding more RAM through paged memory, and the more substantially upgraded BBC Master which took the computer into the 1990s. A cheaper version of the BBC called the Acorn Electron met with limited success. But Acorn had something else up their sleeve which was ultimately more important – the Acorn Archimedes, the world’s first production computer with an ARM processor. The ARM itself was designed by Acorn and was largely shaped by their experience with the simple, speedy 6502 found in the BBC.

Acorn Electron
Acorn Electron


Because it was both a popular machine and very reliable, there are lots of BBC Micros on the market today. Typically the capacitors in the power supply fail over time and need replacing, but other than that there are few problems. Floppy disk drives are another matter though, these can be quite rare. A complete working system with accessories can be worth well over £500.

You can argue at length what the ultimate 8-bit computer was, but the unique expandability options of the BBC surely make it a contender in any contest. The ARM processor which it inspired is – of course – what the world runs on today,

Image credits:
StuartBrady via Wikimedia Commons - CC0
marcus_jb1973 via Flickr - CC BY-NC-ND 2.0
Steve Elliott via Flickr - CC BY-SA 2.0
Adam Jenkins via Flickr - CC BY 2.0


Tuesday, 17 August 2021

IBM Personal Computer Model 5150 (1981)

Introduced August 1981

Four years on from the launch of the holy trinity of the Apple II, Tandy TRS-80 and Commodore PET there was a rapidly growing (but fragmented) multi-million dollar market worldwide. Although rival micros tended to be incompatible, business systems showed a growing standardisation around the CP/M operating system and the S-100 expansion bus. Home machines had wildly different hardware and software, but tended to be based around either the MOS 6502 or Zilog Z80 CPUs.

IBM Model 5150 and 5152 printer
IBM Model 5150 and 5152 printer

But in August 1981 came a paradigm shift, thanks to IBM. IBM seemed an unlikely player in the microcomputer market, specialising in powerful but incredibly expensive mainframes and whose initial microcomputer systems were also blistering pricey. It took IBM at least five years to develop a product, which was much slower than the microcomputer market was moving. IBM seemed old-fashioned in a market that was mostly dominated by younger and more agile competitors.

IBM could sense the way the wind was blowing, however. Cheap but versatile micros were finding their way into IBM customer sites while at the same time the market for big iron computing was faltering. IBM wanted a slice of the micro market, while at the same time it was aware that its traditional business processes would not be able to compete.

In a moment of enlightenment, IBM took one look at its internal rulebook and tore it up. Their entrance into microcomputers would follow a completely different path. Dubbed “Project Chess” by IBM, the development work attracts many top-flight IBM engineers to work on this new computer in complete secrecy. The result was the IBM Model 5150 - best known as the IBM Personal Computer or simply the IBM PC.

Instead of basing the PC around an IBM CPU, an Intel 8088 was chosen – as seen in the IBM Datamaster which was being developed at the same time. The PC also took a variant of the Datamaster’s keyboard and expansion slots, but then developed features all of its own. Output was either crisp text via a Monochrome Display Adapter (MDA) card to an existing model of IBM monitor, or to an compatible colour monitor with a Colour Graphics Adapter (CGA) card.

Although the PC could run a version of CP/M, the primary operating system was PC-DOS which was sourced from Microsoft. Quite how this choice of OS was made is now the stuff of legends. Initially IBM approached Digital Research (DR), the makers of CP/M, to provide a software platform for the PC. Although CP/M was designed to run on the Z80, an Intel version had been developed as well. Legend says that the boss of DR – Gary Kildall – was out flying his private plane when IBM turned up at the office unannounced, although the truth probably that DR and IBM couldn’t agree on a licensing structure. IBM then approached Microsoft and asked them to provide an OS. Microsoft didn’t actually make operating systems – their main business was BASIC – but a nearby company called Seattle Computer Products had an OS called QDOS that would run on the 8088. Microsoft bought the rights to QDOS, renamed it MS-DOS and then licensed it to IBM as PC-DOS while retaining the rights to sell MS-DOS themselves.

IBM PC with neatly-labelled floppies
IBM PC with neatly-labelled floppies


Compared to PCs of even just a few years later, the model 5150 was pretty limited. The 8088 was a cheaper and more readily available version of the 16-bit 8086, but the 8088 only had an 8-bit external bus. RAM was theoretically expandable to 640Kb which was substantially more than the competition, but typical configurations topped out 256Kb. Although the 5150 supported twin floppies (up to 320Kb each) the only way to support a hard disk was to use the 5161 expansion box which wasn’t available at time of launch.

The 5150 did have a cassette interface, although almost all systems were bought with floppy drives. Typical configurations would include two serial ports and a parallel port, but eventually you could add a joystick, network card, more memory and other options. The 8-bit expansion card design was physically robust, and IBM published all the specification so that third-party vendors could make their own.

IBM had a rebadged Epson MX-80 printer available as the IBM model 5152, the most popular dot-matrix printer of the time. You could add any other parallel or serial-port printer as long as your software had the drivers for it.

The use of an open architecture (where IBM described in detail the workings of the machine) plus industry standard components made this a very flexible system. Because it was well-built and designed – albeit expensive – it became a popular business computer, although realistically it was priced too high for the home market. Third-party software and hardware followed, so within a year of launch the PC could do everything any other machine could do plus much more.

It was a huge sales success, outstripping IBM’s most optimistic projections several times over. High demand meant that most initial units were sold in the US only. Production of machines for Europe officially started in 1981 when IBM launched a plant in Scotland, but grey imports existed before that. This delay gave the opportunity for rivals such as the ACT Sirius 1 to gain a foothold.

The 5150 was the direct ancestor of almost all PCs in use today (apart from Apple’s Macintosh machines). The IBM PC XT added more expansion slots and hard disk support in 1983, the IBM PC AT came in 1984 and used a much more powerful Intel 80286 CPU. It did seem at the time that IBM was onto a winner, but it didn’t take long for other companies to build compatible machines using the same architecture.

The only proprietary part of the PC was the BIOS which had to be emulated, or in some cases just ripped off from IBM. The Columbia Data Products MPC 1600 was the first true clone of the PC, launched less than a year after the 5150. Better known was the Compaq Portable, launched in 1983, which was not only 100% compatible (and used a legal BIOS) but it was transportable too. Thousands of other companies followed suit, and within a few years IBM’s control of the market was slipping.

In 1987, IBM attempted to change the direction of the PC industry with the launch of the PS/2 range which was more tightly controlled by IBM. Clone makers needed a licence to make a PS/2-type machine which had a different hardware architecture, but few bothered and instead the bulk of the market remained with machines with a direct line back to the original 5150. IBM continued in the PC business until 2005 when it sold the unit to Lenovo.

Today the 5150 commands decent prices for collectors, commanding prices of several hundred pounds for a good one, although they are much rarer in Europe than the United States (and if importing one, you need to get a voltage regulator unless you want to blow up your power supply). Of course, you can buy a direct descendant of the original PC in any computer shop which might give you a less antique experience…

Image credits:
Science Museum Group - CC BY-NC-SA 4.0
Rama & Musée Bolo - CC BY-SA 2.0 FR



Thursday, 29 July 2021

IBM Selectric (1961) and IBM Datamaster (1981)

Introduced July 1961 and July 1981

Remember typewriters? You know, the obsolete technology that existed before the obsolete technology called word processors? Somewhere after people wrote stuff down by hand? No? Oh well, the IBM Selectric probably isn’t for you.

By 1961, typewriters were clunky, slow and inflexible… but businesses everywhere relied on them. IBM had a different vision of what a typewriter could be, and the Selectric was much more feature rich than most of the machines on the market at the time.

Early IBM Selectric Typewriter
Early IBM Selectric Typewriter

One obvious different was the print head – instead of having an individual arm with each letter laid out in a complex mechanical arrangement, the Selectric had a “golf ball” print head which would rotate to find the letter you wanted. On the Selectric, the head moved from left to right rather than the paper moving from right to left. Crucially, if the operator wanted to change the font they would just stop typing and swap in a different print head.

A quite complex electromechanical arrangement made all this work, and to get the best out of the Selectric required either experience or training. But it was faster, more reliable and more flexible than traditional devices and IBM took a large share of the business market.

New versions with more features followed, although the Selectric units were incompatible with each other. Some had correcting ribbons, wordprocessing features and even local storage. Variants of the Selectric could be used as computer printers. By the time the brand was retired in 1986, IBM had sold more than 13 million Selectric devices.

20 years further on, IBM found itself on the cusp of a larger revolution. Business computers had been getting smaller, more powerful and – crucially – cheaper, which was becoming a possible threat for IBM’s large computer business.

IBM wanted its own microcomputer and had started working on creating a unit based on an Intel processor, which was a major design break for IBM who had previously used their own PALM CPUs in their machines. The results of this unconventional effort by IBM is probably not the computer that first springs to mind – the IBM PC – but instead the IBM System/23 Datamaster.

IBM Datamaster
IBM Datamaster

The Datamaster used many of the same or similar elements that would be seen in the PC, including the Intel CPU, expansion bus and keyboard. Instead of the PC’s now-familiar modular design, the Datamaster was an all-in-one box (not dissimilar to the original Mac) designed to be set up by people with no technical experience. It was also IBM’s cheapest computer to date.

Unfortunately for the Datamaster, it had been stuck in development hell and took a very long time to come to market. As it was being readied for launch, the team behind it were also finalising the IBM PC which was launched the very next month. The PC had learned many lessons from the Datamaster, keeping what was good and throwing out what wasn’t. The PC changed the world, the Datamaster found modest sales in die-hard IBM shops.

The Selectric was arguably the ultimate electric typewriter, and while the Datamaster wasn’t the ultimate microcomputer it paved the way for what arguably evolved into one. Both devices are quite collectable, although the Datamaster is much rarer than the Selectric. Out of the two, the Selectric might still be of more practical use... and your children may well never have seen anything quite like a typewriter before.

Image credits:
Marcin Wichary via Flickr – CC BY 2.0
Steve Lodefink via Flickr - CC BY 2.0



Monday, 26 July 2021

Donkey Kong (1981)

Introduced July 1981

Donkey Kong was the arcade game that established Nintendo as a success in the North American market – introducing two of their most iconic characters in the process. But unlike many other games from the golden age of arcades, the development story for Donkey Kong begins in failure.

Donkey Kong detail
Donkey Kong detail

In 1980, Nintendo had attempted to break into the US with a game called Radar Scope which was a 3D space shoot-‘em-up with some advanced graphics for the time. 3000 machines were built and shipped to the States, but sales were poor and 2000 of the cabinets were unsold, prompting a financial crisis for Nintendo.

Donkey Kong was developed initially as a way to reuse the existing cabinets. Instead of a space-based game, this was a platform game where an Italian plumber attempts to climb to the top of the level while being bombarded by barrels thrown down by a primate.

The names of these characters? If you hadn’t guessed, they were Mario and Donkey Kong. Unusually for a game of the time, the characters came first and the game followed after. This process eventually meant that Nintendo had a cast of digital stars they could put into their own games which helped them grow in popularity even more.

Nintendo reworked the logic board from the original Radar Scope game, Donkey Kong had simpler hardware requirement than the shoot-‘em-up, it still possessed colourful graphics, sound effects and music all powered by a Z80 CPU. It wasn’t hard to port it to the booming microcomputer marketplace, and licensed and unlicensed clones were soon everywhere.

Donkey Kong arcade machine
Donkey Kong arcade machine

As well as direct sequels (many of which were based on the same hardware) a whole range of Nintendo games built on the characters and added many more. Mario in particular went on to star in what is probably the most successful video game franchise ever including Super Mario Bros, Mario Kart and many others. Donkey Kong starred in Donkey Kong Country and many other games, often crossing over with Mario.

It’s quite possible that if Nintendo hadn’t been sitting on a couple of thousand Radar Scope machines that such a novel concept might not have been risked. As it was, the descendants of the original Donkey Kong game gave Nintendo a unique edge in the future… which turned out to be not just shoot-‘em-ups after all.

Image credits:
Wordshore via Flickr - CC BY-NC-ND 2.0
Microsiervos via Flickr – CC BY 2.0


Sunday, 20 June 2021

Frogger vs Centipede (1981)

Introduced June 1981

Early popular arcade games tended to be space-themed shoot-‘em-ups, which tended to appeal to male customers. However, games such as Pac-Man had a much broader audience and were especially popular with female players.

Fighting for a share of this market - and introduced roughly at the same time as each other – were Frogger (by Konami and Sega) and Atari’s Centipede. Both these games are regarded as classics of the golden age of arcade machines, but both had very different gameplay.

The origin story for Frogger is as cute as the game itself. Konami employee Akira Hashimoto was watching a frog trying to cross the road from his car, and was thinking about the difficulties the poor creature was having… which led to the inspiration for creating the game. Only the poor old frog in Frogger has an even tougher time.


Frogger machine from Seinfeld
Frogger machine from Seinfeld


In the game, the player starts at the bottom of the screen and tries to make it to the frogs’ homes at the top. To do this, the frog has to cross several lanes of traffic, and then cross a river on floating logs and diving turtles while avoiding alligators. There are many ways to die. Colourful graphics and a catchy soundtrack added to the appeal of the game, and it was a huge hit.

Centipede was another animal-themed game, but very different in execution. From a gameplay perspective, this was closer to a traditional shooter game, but here the adversaries were various bugs that you had to defend yourself against, primarily a long centipede which wound its way down the screen and which would split up if you shot it. Fleas, spiders and scorpions appeared with different behaviours, and the playfield was full of mushrooms which changed the course of the centipede when it hit.


Atari Centipede
Atari Centipede

Like Frogger, Centipede was a huge hit particularly with female players. Both games were widely ported – officially and unofficially – to the booming home computer and console markets. Indeed, both arcade machines shared many hardware parts with theses home machines – Frogger ran on a Zilog Z80 with the versatile AY-3-8910 sound chip and Centipede used the MOS Technology 6502 with Atari’s own POKEY sound chips which found their way into every Atari product of the time. This symmetry in hardware capabilities allowed this generation of video games to be a huge hit away from the arcades. Eventually powerful home computers and then consoles would end the golden age of arcades but by 1981 that was still some way off…

Image credits:
Arturo Pardavila III via Wikimedia Commons - CC BY 2.0
Matt M via Flickr – CC BY-NC-ND 2.0


Monday, 14 June 2021

Texas Instruments TI-99/4A (1981)

Introduced June 1981

When Texas Instruments (often known as just “TI”) entered the home computer, it wasn’t a typical player. Most machines were made by startups, or companies that had specialised in calculators and electronic games. Instead, TI was a massive and long-established electronics manufacturer which could trace its origins back to the 1930s, and by 1981 it was the largest semiconductor company in the world.

Rivals such as Motorola were happy to supply all the important bits and bobs to go into these new microcomputers, but that was as far as it went. However, TI chose to leverage its considerable expertise in silicon to try to carve out a slice of the market for itself.

In 1979 TI launched the TI-99/4, based on the 16-bit Texas Instruments TMS9000 CPU. The TI-99/4 was expensive, had a horrible keyboard and was limited in expansion capabilities. Two years later, TI fixed many of these issues with the improved TI-99/4A with a massively improved keyboard, clever expansion system and – crucially – a price tag that was half that of the original. The TI-99/4A looked promising to consumers, and sales started to take off.

It was a good-looking machine, with plenty of brushed aluminium and black which was in line with the aesthetics of the time. It wasn’t cheap, but the 4A’s price ticket of $525 was at least competitive unlike the 4. The graphics and sound were amongst the best in its class, so initially at least it seemed like a compelling proposition.

Texas Instruments TI-99/4A
Texas Instruments TI-99/4A


At its heart was the TMS9000 CPU, a sophisticated beast that was essentially a 1970s Texas TI-990 minicomputer on a single chip. It should have allowed the 99/4A to be one of the most powerful microcomputers on the market, but instead it was a major source of problems. Because building a full 16-bit system would be prohibitively expensive, almost all the internal architecture is just 8-bit which negated the possible performance impact. More difficult still was the fact that the 16-bit CPU’s instruction set was twice as memory hungry as a contemporary 8-bit CPU.

To get around this, TI essentially created an 8-bit virtual machine using an intermediate language called GPL. This made coding more efficient and was a technically advanced technique, but the processing limitations of the hardware meant that all of this sophistication created a computer that was significantly slower than its 8-bit rivals, despite running with a 16-bit core.

No computer of the era was perfect though, so the TI-99/4A wasn’t disadvantaged as much as you might think. But there were other problems – and the main one was software. TI were reluctant to share information about the platform with independent developers, instead TI wanted to produce the bulk of the software and peripherals for the 99/4A themselves – and thus profit from them. In truth, the TI-99/4A was probably better than most offerings but it was much weaker than the likes of the venerable Apple II or the upstart Commodore VIC-20.

But there was trouble brewing, and it was the Commodore VIC-20 which would deliver it in a giant tankard with a single raised finger painted on the side. Commodore’s boss – the legendary Jack Tramielloathed TI for nearly bankrupting his business during the pocket calculator wars of the 1970s. The VIC-20 ran on the 8-bit 6502 CPU (built by Commodore subsidiary MOS Technology) which was cheap, fast and well understood by programmers. The VIC-20 wasn’t as sophisticated as the TI-99/4A, but it was about half the price… at first.

Tramiel dropped the price of the VIC-20, TI followed suit. A price war emerged with both Commodore and TI dropping the prices until both units were shipping at less than $100. TI was haemorrhaging cash at this price point, but sales were good and it thought it could make the money back on software and peripherals. It couldn’t. TI started to lose hundreds of millions of dollars in this price war, driving the whole corporation into a sea of red ink. Even cost-cutting in production couldn’t turn it around – late 99/4As swapping to a cheaper beige case rather than the snazzy aluminium-and-steel one.


Late model fully-expanded TI-99/4A
Late model fully-expanded TI-99/4A

TI couldn’t sustain these losses, and in late 1983 it announced that the TI-99/4A would be discontinued. Production ended in the spring on 1984 and TI cancelled the interesting TI-99/2 and TI-99/8 systems that it was working on. Instead TI switched its efforts to 8088-based PCs running DOS, machines that were better than the IBM PC but weren’t IBM PC-compatible. In retrospect this was not a winning market strategy either. On and off TI stuck with the PC business, coming up with the TravelMate line of laptops which were quite successful, but TI sold their PC business to Acer in 1997.

Ultimately TI went back to concentrating on making the components that make the world go around apart from one consumer product – calculators. Yes, the product that so ired Jack Tramiel is still a profitable line for TI and outlasted the Company that dared to challenge it.

Image credits:
Max Mustermann via Wikimedia Commons – CC BY-SA 2.0
Leigh Anthony Dehaney via Flickr – CC BY-NC 2.0


Monday, 26 April 2021

Hayes Smartmodem (1981)

Introduced April 1981

The sound of modems belongs to a certain era before ubiquitous broadband. The characteristic screeching noise – a bit like a fax – joined in the rat-a-tat of dot matrix printers and the clunk clunk of mechanical disk drives. Modems had been around since the 1950s, a way of connecting computers together over the omnipresent telephone network. But initially they were very expensive and aimed at really big computer systems. As time went on, they became more affordable.. but not very usable.

By the late 1970s modems for computers had developed in two different ways – the acoustic coupler was a device where the screeching noise was fed into the telephone handset (often via a serial cable) or alternatively where it was permitted, the modem would be a card inside the computer with a telephone connection built in. But the acoustic coupler was bulky and slow, but the alternatively tended to need a modem designed specifically for every model of computer on the market – and these were only available for large systems and not the booming microcomputer market. There had to be a better way.

What was needed was a modem that could work with just about anything. That was the Hayes Smartmodem.

Hayes Smartmodem
Hayes Smartmodem


The “Smart” in Smartmodem wasn’t just marketing speak. It took advantage of the fact that almost every microcomputer system on the market had a serial port fitted, or one available as an optional extra. By using a serial port, all you needed to connect the Smartmodem to your micro was the appropriate cable, which if you couldn’t buy you might be able to make yourself.

But the implementation of serial ports varied from computer to computer, the Smartmodem needed to know (for example) when to hang up the connection. More sophisticated computers used pins to indicate when the connection was up or down, but cheaper ones didn’t. The serial port could also be running at a variety of speeds, so matching the port with the modem could be tricky on some devices.

Hayes designed a series of commands to control the modem, all beginning with “AT” for “attention”. But because all the commands started with the same two latters, the modem would attempt to use this to automatically match the baud rate of the computer with the modem. This made setting up the Smartmodem much simpler, but there was a more tricky problem… how could you tell the modem to hang up if you had a basic serial port that didn’t have the right wires to signal that to the modem?

To achieve this, the Smartmodem would look for a sequence “+++” followed by a once-second pause. This would break out of the communications sequence and make the modem ready to receive a command. If that command was ATH then the modem would hang up. It was an elegant solution, the pause minimised the possibility of it happening by accident. When competitors tried to copy the functionality of the Smartmodem, this was often implemented badly (in part because Hayes had patented it and demanded a fee). This meant that on some non-Hayes modems could hang up completely at random if they were sent the +++ sequence accidentally.

In these pre-internet days, modems would be use to connect computer directly to another computer, or perhaps to a BBS (bulletin board system) or if you were one of a small number of privileged people, they could act as a gateway to what was to become the internet.

The original Hayes Smartmodem was a 300 baud unit, but as technology improved the Hayes modems became faster. However, competition was also becoming fierce and although Hayes products were expensive, they were also very reliable and they carved themselves a healthy share of the market.

All good things come to an end though, and in the 1990s Hayes bet the barn on ISDN products, a market that never materialised. Competitors such as USRobotics were taking the analogue modem market. By the mid-1990s Hayes were in serious trouble. Bankruptcy and mergers led to them being subsumed into rivals Zoom Telephonics, where the brand eventually vanished. However, the Hayes website is still available although it was last updated in 2013.

Surprisingly, analogue modems are not quite a dead technology but their heyday has certainly passed. However, Hayes certainly made it easier to connecting disparate computer systems together and in part that drove the uptake of the internet in the 1990s.

Image credit:
Michael Pereckas via Flickr - CC BY-SA 2.0


Sunday, 18 April 2021

Xerox Star 8010 (1981)

Introduced April 1981

By the early 1980s, hardware and software designers had great dreams about what they wanted products to be. Portable perhaps, affordable or business-oriented… but all of these were constrained by technology and price. But what if you dreamed big and without compromise, and built the best computer system you possibly could? This is what Xerox did.

The catchily-named Xerox 8010 Information System – more commonly known as the Xerox Star – introduced potential customers to the graphical user interface, mouse, Ethernet, servers and email. A great deal of modern computing technology was first available in the Star, but it certainly came at a price.

Xerox Star 8010
Xerox Star 8010


It had been a very long journey. Doug Engelbart’s Mother of All Demos in 1968 had introduced many of these modern concepts, but running on primitive hardware. Many of Engelbart’s team migrated away to the giant Xerox corporation which had pioneered photocopiers and laser printers. The fortunes of Xerox were very much based in paper, but the concept of the paperless office loomed large and Xerox wanted to still be in business when paper was consigned to museums.

The Xerox Alto was their first attempt, launched in 1973 it incorporated a GUI (graphical user interface) and a mouse, but it was never sold commercially. Instead the Alto was deployed around the Xerox PARC as well as some universities and research organisations. It took another eight years for Xerox to realise a commercial product – the 8010 – but even though it had taken over a decade since Engelbart had shown the concepts, the Star was still way ahead of everyone else.

Strictly speaking, “Star” referred to the software rather than the hardware. And this wasn’t simply a computer you could buy and take home. Doing anything required a network, some servers and perhaps $100,000 in 1981 money for a small installation (about $250,000 today).

Japanese market Fuji Xerox 8012-J
Japanese market Fuji Xerox 8012-J


The price like the name was astronomical. But what that substantial wedge of cash bought you was a computer system with a high-resolution 17” monitor, a carefully thought out software interface that could work collaboratively with others, based on the high-end AMD Am2900 CPU. And the software was like nothing else.

Everything was WYSIWYG (“what you see is what you get”) – you could edit two pages of a document side by side, including charts and tables from other applications and when they printed out they matched what was on the screen. You’d expect that today, but in 1981 it was revolutionary. The clever object-oriented operating system delivered features to the desktop that wouldn’t be common until a decade later.

There’s a problem with trying to sell customers a product that they don’t know they want at a price they can’t afford... all the efforts of Xerox to create an advanced computer system did not translate into many sales. Xerox tried to reposition the 8010 into a desktop publishing platform called the 6085 (aka Daybreak) which included a laser printer, and although this was a capable system it was still expensive and sales were slow. Later attempts to port the software to OS/2 and other platforms also failed. Xerox weren’t done with WYSIWYG though, a spin-off created the iconic Ventura Publisher, but that was only a passing success.

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Xerox Star UI
Xerox Star UI


Despite being a sales failure, the Star was a technological success. In particular elements from the Star user interface found their way into the Macintosh, Windows and a host of other platforms. The networked environment too was increasingly emulated by competitors. As is sometimes the case with big, sprawling companies the Xerox Corporation itself did not seem to understand or be able to protect its own intellectual property. As with many pioneers, it was other adapting their idea that made it a success. Today elements of the Star user interface are pretty much everywhere, but this pioneering system is long dead.

Image credits:
Rhys Jones via Flickr - CC BY-NC 2.0
Fuji Xerox - Courtesy of FUJIFILM Business Innovation Corp
Amber Case / Digibarn via Flickr - CC BY-NC 2.0



Sunday, 11 April 2021

Victor 9000 / ACT Sirius 1 (1981)

Introduced April 1981

By 1981 the business microcomputer market was developing very rapidly. First generation 8-bit systems were giving way to more powerful 16-bit systems, and so too a new generation of computer companies were challenging the early pioneers.

One of these companies was Sirius Systems Technology, founded by (among others) the legendary Chuck Peddle who had designed the Commodore PET and MOS Technology 6502. Peddle and his team then set about designing a next-generation computer system based around Intel’s 8/16-bit CPU, the 8088, called the Victor 9000.

Now you’ve probably heard about the IBM PC, also launched in 1981 and eventually finding its descendants on just about every work desk everywhere. The Victor 9000 was better and hit the market first, but would it be enough to succeed? The answer is complicated.


Victor 9000
Victor 9000

It was based around a 5MHz 8088 CPU with between 128Kb to 896Kb of RAM, a high-resolution 800 x 400 pixel display, clever variable-speed floppies with up to 1.2Mb of storage, a bunch of interface ports and a very pleasing industrial design. On top of this the Victor 9000 could run CPM/86 (the 8086/8088 version of CP/M) and could also run Microsoft’s new (although slightly recycled) MS-DOS operating system. A useful wordprocessor, spreadsheet and financial management software could be bought to run on it.

Overall, this was a good and extremely competitive system… and perhaps it could have been a world leader if it wasn’t for the launch of the IBM PC in the US in August 1981. The PC was more expensive and less capable, but the magic three letters “IBM” ensure that larger corporations went out and bought it. Sales of the Victor 9000 were disappointing in the United States… but IBM waited another 18 months to launch the PC in Europe where the market was wide open.


Sleeker Victor 9000 with half-height drives
Sleeker Victor 9000 with half-height drives


In Europe, the Birmingham-based Applied Computer Techniques (ACT) acquired a licence to sell the Victor 9000 as the ACT Sirius 1. With little competition, the Sirius 1 became a major success in the UK and Germany in particular, even though it wasn’t really PC compatible in any meaningful way. Of course when IBM did start shipping into Europe, sales of the Sirius I were hit badly.

ACT Sirus 1 advertisement
ACT Sirus 1 advertisement


For the US-based Sirius Systems, their history was short one that followed a traditional path – only three years after the launch of the Victor 9000 they were bankrupt. It was a different story for ACT who launched several generations of advanced but not-quite-PC-compatible computers under the “Apricot” brand afterwards including the world’s first production system based on a 486 CPU. A takeover by Mitsubishi in 1990 was effectively the end of the independent Apricot brand - indeed Mitsubishi shuttered operations in 1999 – but it outlasted Sirius Systems, and along the way ACT kept innovating and was probably far more influential than its American partner.

Image credits:
Samuel via Flickr - CC BY-NC 2.0
Bradford Timeline via Flickr - CC BY-NC 2.0
The Henry Ford Museum - CC BY-NC-ND 3.0



Wednesday, 7 April 2021

Osborne 1 (1981)

Introduced April 1981

These days we take our computers everywhere – powerful smartphones, big-screen tablets and for more serious work, laptop computers that can do anything that a desktop machine can do. But if you wanted to take your computer with you forty years ago, then it was a serious hassle to disassemble everything and then assemble it all on the other end – travelling with a computer was just not a practical proposition.

That wasn’t the only issue in the early ‘80s. Even if you bought a computer, at best you’d have the operating system on a floppy disk and really nothing else. To get the most of it you would need to buy software for it, which could often cost more than the substantial amount of money you had already spent on the machine.

Launched in April 1981, the Osborne 1 attempted to tackle both of these issues. A self-contained “luggable” computer, you could simply unplug it from the wall socket and take it with you. Although it weighed a hefty 10.7 kilograms, it was packaged in such a way that you could stow it under an airline seat and potentially take it anywhere. The hardware had its appeals, but it was the bundled software – nominally worth $1500 – which had even more appeal, especially given that the Osborne 1 was priced at $1795. It seemed like a bargain.


Osborne 1

The bundled software included WordStar (the leading wordprocessor of its time), dBASE II (the leading database package), SuperCalc (a spreadsheet), PeachTree accounting software, two versions of BASIC, some tutorials and a couple of games: Infocom’s Deadline and a version of Colossal Cave.

Inside the Osborne 1 was a Z80 CPU with 64Kb of RAM, running CP/M 2.2 which was pretty typical for its time. A pair of full height floppies were on either side of a tiny 5” CRT display – smaller than most modern smartphones. The small screen size was in part due to the limited space left in the case due to these drives, which were chosen for robustness rather than capacity and as a result could only store 90Kb. An external monitor interface was available, so you could have a screen both in the office and at home which is still a common solution to portable displays today.

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It's a "portable" computer. You can move it. Not put it on your lap.

Despite its flaws, the Osborne 1 found its niche. No other company made a viable portable computer, and the software package made it a compelling buy even if you didn’t want to lug it about. It was somewhat expandable too, including a 300 baud modem that could fit into one of the diskette storage bays which made the Osborne 1 viable for rudimentary remote working.

Although the shine was coming off CP/M with the launch of the IBM PC later in 198, Osborne was still selling these in quite large numbers and at a profit. They also had more machines in the pipeline, including the Osborne Executive which had a bigger screen, more storage and more RAM. Things were going well, but then a disaster occurred.

The disaster was a human one. Adam Osborne - a prolific writer of computer books who had founded the Osborne Computer Corporation – announced the follow-on models a significant time before they were ready. Customers and distributors stopped buying the Osborne 1 in anticipation of the better models. This cutting away of their customer base also coincided with the launch of the Kaypro II and eventually the PC-compatible Compaq Portable for high-end users. The company declared bankruptcy in 1983 – just two and a half years after the release of the Osborne 1 – trying a last-ditch attempt to get back in the market with the Executive and the more advanced Osborne Vixen. Ultimately it failed to re-establish a foothold in the market it created, although Osborne limped on until 1985 ultimately producing the Osborne 3 which was based on the Morrow Pivot.

One you added a couple of full-height floppy drives there wasn't much space for anything else

Today the infamous “Osborne Effect” is probably better known that the computers that presaged it. Most collectable models are in the United States, but prices for one in working condition are typically just a few hundred dollars.

Image credits:
Tomislav Medak via Flickr – CC BY 2.0
Thomas Conté via Flickr - CC BY-SA 2.0
Dave Jones via Flickr – CC0

Saturday, 6 March 2021

Sinclair ZX81 (1981)

Launched March 1981

By early 1981 the microcomputer revolution was well underway, with plenty of options available for people wanting to dip their toe into this new high-tech world. The problem with most of these options was that they were expensive.

In the US, the Commodore VIC-20 was leading the charge on behalf of low-cost computing, but in the UK there had been an even cheaper and more basic computer launched in 1980 in the shape of the Sinclair ZX80 which had been a modest success. But it was Sinclair’s next computer – in the shape of the Sinclair ZX81 – that became the ground-breaking machine that found its way into more than a million homes.

Sinclair ZX81
Sinclair ZX81


On paper, the ZX81 was just a minor upgrade to the ZX80. But crucially, Sinclair had redesigned the electronics completely – where the ZX80 had 21 mostly off-the-shelf chips, the ZX81 had just 4. The difference was a custom-built ULA designed and built by computing pioneers Ferranti. This made the whole design simpler, and critically cheaper. A fully-assembled version cost just under £70, compared to £100 for the ZX80. If you were a real cheapskate you could buy a kit for just £49.95 and assemble it yourself.

The ZX81 was a simple but clever system. Smaller than a sheet of paper, the ZX81 boasted a reasonably powerful Z80 CPU clocked at 3.25MHz but only had a tiny 1Kb of RAM as standard. A truly terrible membrane keyboard also came with all the ZX81 BASIC functions pre-printed onto the keys, making it easier to learn how to program the thing. All you needed was a domestic TV and a cassette player so you could save and load programs, and you’d be away. In a strictly limited sense.

Text was a 32 column by 24 line affair, or a limited 64 x 48 pixel graphics display. There was no colour or sound, and anything displayed on the screen ate into the tiny amount of RAM. Also, the limited hardware meant that the ZX81 had to use a fair chunk of processor cycles to update the image which slowed it down..  you could speed things up by using FAST mode which prioritised speed over the display, which would white out when the computer was thinking.

On the back of the ZX81 was a simple edge connector, which most owners used to attach a notoriously wobbly 16Kb RAM pack, but Sinclair also sold a tiny printer that output onto silver paper. But the edge connector could be used for more, and a small cottage industry sprang up making everything from replacement keyboards, sound generators and even disk interfaces. A wide range of decent quality software appeared on tape, and a number of magazines produced printed BASIC programs that the user could laboriously key in and debug.

It was a good-looking system, designed by Rick Dickinson who had a long association with Sinclair. The comprehensive manual also featured gorgeous cover art by sci-fi artist John Harris. The fabulous design didn’t always make up for variable build quality, but certainly the unboxing experience was something a bit special.

Typical ZX81 configuration with cassette recorder, monochrome TV and manual
Typical ZX81 configuration with cassette recorder, monochrome TV and manual


Despite its flaws, the ZX81 was a hugely popular system – especially in the UK. However, an attempt to break through into the US market in partnership with Timex (who assembled the ZX81) met with limited success. A number of other clones – some licenced, some illegal – followed in worldwide markets. Enthusiasts continue to develop hardware and software for the ZX81 even today.

The profits from the ZX81 were substantial, putting Sinclair in an excellent position to develop their next machine, the ZX Spectrum. More importantly, the ZX81 introduced millions of people to computers and programming and helped to make those fields popular in the markets the ZX81 succeeded. Today the ZX81 is quite collectable with a thriving trade in software and add-ons, prices for ones in excellent condition can exceed £100 but there are bargains if you hunt around. 

Image credits:
Science Museum Group
- CC BY 4.0
Mike Cattell via Wikimedia Commons - CC BY 2.0