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The "odd couple": STM32F030R8 + CPU V20

Posted: Thu Feb 20, 2020 10:09 am
by Just4Fun
Hi all, I'm currently playing with a new "retro project" (an other useless stuff... :lol: ) using a V20 CPU (uPD70108HCZ).
It is a special version of the Intel 8088 CPU (that one used on the IBM PC) that can also run 8080 code.

I'm using a STM32F030R8 MCU (on the white custom board ARMando) as "companion" I/O processor that emulates all the "legacy" I/O chips:

Image


Here the first "Hello world" test (uPD70108HCZ @ 8MHz):

Image

It is possible follow the development here.

Re: The "odd couple": STM32F030R8 + CPU V20

Posted: Thu Feb 20, 2020 10:35 am
by ag123
maybe you can run dos on it, memory is pretty tight though :lol:
https://www.freedos.org/

Re: The "odd couple": STM32F030R8 + CPU V20

Posted: Thu Feb 20, 2020 11:09 am
by Just4Fun
ag123 wrote: Thu Feb 20, 2020 10:35 am maybe you can run dos on it, memory is pretty tight though :lol:
Yes may be... :D
The final board will have 1MByte RAM (all the address space fitted...) :mrgreen:

Re: The "odd couple": STM32F030R8 + CPU V20

Posted: Thu Feb 20, 2020 2:46 pm
by arpruss
Or cp/m on the 8080.