Does anybody knows some manufacturer of a replacement for the NEC V20 (or Intel 8088)? I have learned Innovasic offers some 80188 and derivatives replacements but no direct replacement for the former ones. This is for a legacy product and I would like to leave its software (and hardware if possible) as untouched as possible. As a second alternative we consider using some IP, if available.
Thank you in advance for your help.
Elder.
I think the best you can do is something like an RDC R8822.
I very much doubt you will find a replacement. Almost everything in Xx86 line will handle all the x86 instructions of the V20, but none of them will handle the 8080 instruction set ability. If you don't need that ability, then you only want a replacement for the x86 coding, which should not be a problem.
There is one catch if the V20 is replaced by a 8088 derivative: The V20 will also run
8080/8085 opcodes in a special emulation mode, so a replacement will not work if the 8080/8085 mode is used.
OP stated he would accept an 8088 substitute. Was the V20's emulation mode ever used for anything besides CP/M-80 emulation? :)
Maybe for running some other legacy 8085 code.
My use was just a CP/M emulator running on a PC/XT with DOS 2.11.
The V20 couldn't run 8085 code. Only 8080 (and 8086).
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