Sujet : Re: Zilog stopping Z80 production
De : blockedofcourse (at) *nospam* foo.invalid (Don Y)
Groupes : sci.electronics.designDate : 23. Apr 2024, 22:40:13
Autres entêtes
Organisation : A noiseless patient Spider
Message-ID : <v096bl$1qub6$1@dont-email.me>
References : 1 2 3 4
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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!