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Month: June 2018

Amstrad CPC ROM emulation using an STM32F4 – Part 2

June 13, 2018
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| retrocomputing

So in part 1 (Amstrad CPC ROM emulation using an STM32F4) the code I had for emulating a ROM (and some IO) with a cheap STM32F4 board for the Amstrad CPC 464 ran in a continuous polling loop. The code just watched  _ROMEN and _IORQ going high and low, and acted appropriately. The (sort of […]

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Posted in <a href="https://www.kernelcrash.com/blog/category/retrocomputing/" rel="category tag">retrocomputing</a>

Amstrad CPC ROM emulation using an STM32F4

June 3, 2018
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| retrocomputing

UPDATE: There is a ‘part 2‘ to this article. In that I use interrupts, instead of the polling technique shown below So, in emulating a hardware ROM in real time with an STM32F4 I hooked up a cheap US$10 STM32F4 board to my Acorn Electron to act as both a sideways ROM board and a sort of […]

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Posted in <a href="https://www.kernelcrash.com/blog/category/retrocomputing/" rel="category tag">retrocomputing</a>

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