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8085 and APU/FPU #192

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Torinde opened this issue May 7, 2024 · 3 comments
Closed

8085 and APU/FPU #192

Torinde opened this issue May 7, 2024 · 3 comments

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@Torinde
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Torinde commented May 7, 2024

Will you add emulation for 8085 and 8231/8232 APU/FPU chips?
@feilipu
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feilipu commented May 7, 2024 •
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Just for reference, in case you want to add the Am9511A (i8231A) APU, z88dk-ticks has an implementation here.

And the 8085 undocumented instructions are implemented here.

@MockbaTheBorg
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Sorry, no 8080/8085/8086/68000. RunCPM is Z80 only.

@feilipu
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feilipu commented May 7, 2024 •
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Just FYI, we (for RC2014 and for z88dk) run / support Am9511A APU mainly for the Z80.

Intel only licensed it (as i8231A) for their 8085 and 8086 CPUs because their 8087 FPU was not ready.

The APU floating point is up to about 3x faster than the best Z80 software floating point libraries we have, even today nearly 50 years later.

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@feilipu @MockbaTheBorg @Torinde