Buying some Z80 CPUs which ones to get?

Z80 would be too slow, Z80A will work, and if the code can handle the timing, the Z80B would work as well, if the code doesn't handle timing well, the Z80B could make the game go much much faster.
 
Z80 would be too slow, Z80A will work, and if the code can handle the timing, the Z80B would work as well, if the code doesn't handle timing well, the Z80B could make the game go much much faster.

By that thought the ez80 would make it go REALLY fast!

So both Galaxian and DK Jr both came with the Z80A?
 
Z80 would be too slow, Z80A will work, and if the code can handle the timing, the Z80B would work as well, if the code doesn't handle timing well, the Z80B could make the game go much much faster.

The CPU will only go as fast as the board clocks it. So you're not going to see any difference by putting a Z80B in where a Z80A was intended. The MHz rating for the CPU refers to the max clock speed at which it can be reliably run.
 
The CPU will only go as fast as the board clocks it. So you're not going to see any difference by putting a Z80B in where a Z80A was intended. The MHz rating for the CPU refers to the max clock speed at which it can be reliably run.

So it runs at the speed of the crystal? Some later processors had clock doublers, so I wanted to make sure.
 
Yeah, nothing fancy going on with Z80's.
If I can find them cheap, I usually buy Z80B (or faster). That way I can use them in just about anything.
 
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