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On 4/23/2024 6:09 AM, Peter Heitzer wrote:The most difficult part is to put all into a 40 pin 300 mil package as>
a drop in replacement.
The most common Zx80's were 600mil.
>If all I wanted was a machinery to run Z80 software>
my choice wuild be a RP2040 board.
https://github.com/djbottrill/rp2040_z80_emulator
You can likely emulate a Zx80's *software* faster than even the
fastest devices, nowadays. But, for legacy software, you would
have problems supporting the I/Os -- even if you virtualized them.
>
One amusing anecdote re: MAME's nominal emulation of older games
is how they can't[1] ensure the same timing relationships that were
guaranteed in the original hardware. Getting the functionality
correct but the timing "off" can have visual consequences.
>
Part of that is a consequence of trying to get more performance
out of the hardware than was nominally available. And, part was
a lack of concern for "portability" (of which emulation is
probably the epitome).
>
[1] You could, of course, do so -- by dramatically increasing the
complexity of the emulator!
>
>
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