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Maximum speed of serial I/O bit-banged by 8-bit CPU

Bit-banging by processor would be the exception, rather than the rule; 8 bit shift registers weren't that rare or expensive. (But bit banging the tape port was fairly common, as this could be done ...
hawk's user avatar
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4 votes

Maximum speed of serial I/O bit-banged by 8-bit CPU

On the 6502, a lot depends upon the placement of the bits in whatever I/O register is being used or--for reception--if one bypasses the use of an I/O register entirely. The fastest reception from a ...
supercat's user avatar
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6 votes

Maximum speed of serial I/O bit-banged by 8-bit CPU

There are so* many misconceptions in that question, it's hard to know where to start. The issue with IEEE-488 was absolutely nothing to do with it being parallel, and everything to do with it being a ...
Graham's user avatar
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6 votes

Maximum speed of serial I/O bit-banged by 8-bit CPU

Hmm...at least offhand, it seems like you need around 4 instructions per bit and a Z80 needs at least 4 T cycles per instruction. Along with that you need to load the next byte from memory once every ...
Jerry Coffin's user avatar
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9 votes
Accepted

Maximum speed of serial I/O bit-banged by 8-bit CPU

Well there is no simple answer. If you assume that the CPU runs undisturbed, you can just count the cycles and that's how many systems already handle their tape storage, you just seem to want higher ...
Justme's user avatar
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