8 Feb
2003
8 Feb
'03
5:58 a.m.
On Sat, 8 Feb 2003, Jim Keohane wrote:
I'm either being imprecise or various readings
I have done were
imprecise. The reference to "one cycle" instruction may have been referring
to there being 2 cpu cycles per clock cycle. Also, there's the
"pipelining"
some say the 6502 does when the last (or only) byte of an instruction is
acted upon simultaneous to next instruction's 1st byte (opcode) being
fetched
Ok, I didn't realize that "one cycle" != 1 CPU cycle. I just know that
I have a handy chart of how many clock cycles an instruction takes and the
minimum number for any instruction is 2. I guess the key phrase is
"clock cycles". Perhaps it's just semantics?
Of course, we're talking Apple ]['s which,
if I can trust my memory,
steal every other clock cycle to refresh memory.
I don't know myself.
Sellam Ismail Vintage Computer Festival
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