Pac-man z80 cpu's. Can any one of them be used?

Thomas

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I notice that there are a bunch of different z80's made by different companies and different speeds?

Is a z80 a z80 when installed in a pac board? Does it matter what it came out of?

Also what other kind of boards/games use this cpu that are arcade related?
 
Yeah, any speed Z80 should work in a pac. But there are many chips labeled Z80 that are not processors, for example Z80A PIO.

"My understanding is that you can put a higher speed Z80 in but you can't go down."
True, im pretty sure pac uses a 2mhz Z80 which I think is the slowest one so you should be good.
 
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Yeah, any speed Z80 should work in a pac. But there are many chips labeled Z80 that are not processors, for example Z80A PIO.

"My understanding is that you can put a higher speed Z80 in but you can't go down."
True, im pretty sure pac uses a 2mhz Z80 which I think is the slowest one so you should be good.

Just wanted to necro-bump this thread.

The spec calls for a Z80A (4MHz) because the CPU is being run at 3 MHz (per page 29 of the Pac/Ms.Pac Troubleshooting Guide part 2). A regular Z80 is rated for 2.5 MHz, so extra 500 kHz would be "over-clocking" it past what the manufacturer recommended for that chip.

Can you? Probably. It's not like we run those things 24/7, and any Z80's that still work are survivors anyway ;) - just don't complain to Zilog when your 39-year-old Z80 dies from overheating!
 
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