Ordania-DM@cup.portal.com (Charles K Hughes) (12/14/89)
I've been looking through USENET to find the appropriate place for this
question and since I found this conversation about "System clock rates vs.
memory accesses" I figured this was the best place.
Anyway my question is: can I speed up my computer?
The computer is a 6502 running at 1.79MHz with a 6520, 64k ram/rom,
and 3 special purpose chips that provide interrupts, i/o, and graphics.
I want to speed up the 6502, 6520, and ram/rom to run at 3.59MHz, and I want
the other chips to stay at 1.79MHz. I can get 4MHz versions of the 6502 and
6520, but not of the special chips. One of the special chips will steal
cycles from the 6502 in order to read ram (never writes). Can I do this
without redesigning the computer?
Thanks
Charles Hughes
@cup.portal.comhenry@utzoo.uucp (Henry Spencer) (12/16/89)
In article <24992@cup.portal.com> Ordania-DM@cup.portal.com (Charles K Hughes) writes: > The computer is a 6502 running at 1.79MHz with a 6520, 64k ram/rom, >and 3 special purpose chips that provide interrupts, i/o, and graphics. >I want to speed up the 6502, 6520, and ram/rom to run at 3.59MHz, and I want >the other chips to stay at 1.79MHz. I can get 4MHz versions of the 6502 and >6520, but not of the special chips. One of the special chips will steal >cycles from the 6502 in order to read ram (never writes). Can I do this >without redesigning the computer? Actually, sci.electronics would have been a better place to ask... However, the answer is virtually certain to be "no". All those special chips will almost certainly malfunction if you try to run them at twice their rated speed, and it is most unlikely that your machine has any provision to run different parts at different speeds. -- 1755 EST, Dec 14, 1972: human | Henry Spencer at U of Toronto Zoology exploration of space terminates| uunet!attcan!utzoo!henry henry@zoo.toronto.edu