tag:blogger.com,1999:blog-7216515530093728843.post4433077549671148556..comments2024-03-03T08:45:08.970+00:00Comments on Retromobe - retro mobile phones and other gadgets: Sinclair ZX Spectrum (1982)Unknownnoreply@blogger.comBlogger2125tag:blogger.com,1999:blog-7216515530093728843.post-67716315186914043232022-04-17T08:06:11.382+01:002022-04-17T08:06:11.382+01:00Also, the 128k speccy (and subsequently the +2, +3...Also, the 128k speccy (and subsequently the +2, +3 and +2a) all had much improved sound capabilities in the from of the 3 channel AY chip found in many other machines (Amstrad 464, Oric, Atari St etc etc)Anonymoushttps://www.blogger.com/profile/16647530671814945104noreply@blogger.comtag:blogger.com,1999:blog-7216515530093728843.post-29697267604531378932022-04-17T08:02:57.837+01:002022-04-17T08:02:57.837+01:00"but you could only have one foreground (INK)..."but you could only have one foreground (INK) and one background (PAPER) could in each 32x24 pixel character grid." It was 8x8, each text character could have an ink and paper, this meant the attribute layer of the screen used 768 bytes, one byte per square. Each byte has 3 bits for ink, 3 bits for paper, 1 bit for brightness on/off and one for flash on/off which would invert the paper and ink values every half second or so. And how I know this off the top of my head 40 years later is mental!Anonymoushttps://www.blogger.com/profile/16647530671814945104noreply@blogger.com