#mastodon #threads
Aug 16, 2020
List of Z80 compatible variant processors with additional features.
The Z80 is backwards compatible with the 8080 and adds extra instructions and features. the 8080 eventually became x86. Z80 went a different direction. THE LIST:
Z80A
Z80B
Z80H
Z800
R800
HD64180
Z180
Z280
Z380
eZ80
USSR T34VM1 (soviet clone!)
TMPZ84C00AP-8
Sharp LH0080
Sharp LR35902 (gameboy cpu, BCD instructions and IX,IY registers removed, PSG sound added.)
boosted from @thamesynne : “
so earlier today something reminded me of the ZedRipper - 16 Z80s, each with 64KB RAM, and a terminal multiplexer showing the screen of any 4 of them at once, all in a laptop:
@thamesynne continued: “
and then i discovered that some researchers, in 1981, strung 256 Z80 processors together, each with 64KB of 300ns RAM and a bunch of high powered support components (including a fast multiplier and an FPU copro!), and a high speed communications network based on 48-bit shift registers running at 10MHz together to investigate multiprocessor / AI applications
https://www.ijcai.org/Proceedings/81-2/Papers/071.pdf
“