19 Dec
2001
19 Dec
'01
10:18 p.m.
Cameron Kaiser wrote:
But even with this artificial concept, the 6502 is still running through
instructions in fewer average clock cycles. Granted, the Z80 has a good
selection of more complex instructions that take fewer clock cycles than
the equivalent 6502 code in total. How often they get employed for this
advantage, however, directly affects their run-time impact of course.
One real problem with the Z80 is that a there is a lot of
unused/undefined
instructions because of the complex instruction set, that have been
decoded
and used in software. This has a impact if you are not using a real chip
but a emulator of some sort.
--
Ben Franchuk --- Pre-historic Cpu's --
www.jetnet.ab.ca/users/bfranchuk/index.html