On 10/28/2011 04:22 PM, Michael Black wrote:
On Fri, 28 Oct 2011, Steven Hirsch wrote:On 10/28/2011 12:25 PM, sporadic wrote:And as Sean pointed out, it might be cheaper to just get a IIc+ than to retrofit a IIc with 3.5" and a ZipChip (a rare item).And, for even more computing pizazz you can hotrod many IIc+ machines to double the clock speed (or more?). Word of warning: Do not make removal and replacement of the can oscillator your first soldering experience :-). It's not rocket science, but you'll be working with a double-sided board that requires a bit of finesse.That doesn't impact on other things in the IIC? (I have no idea.)
I'm referring to IIc+ and, no, it does not. The IIc+ has essentially an embedded ZipChip 4000 (4Mhz.). Increasing the core CPU clock has no effect on anything else, since it's throttled back to 1.x Mhz. for timing-sensitive diskette routines, etc.
I got my OSI Superboard 30 years ago next month, I couldn't afford an Apple II at the time. And I don't recall it being that much time after I had it that I modified it so it would run at twice the original clock speed, so it was running at 2MHz. Right away I could see the snap in the system, it wsa only twice the speed and pretty slow speed to begin with, but that really was a noticeable change.
It will be quite noticeable on a IIc+.
Now it's really hard to double the speed of a current CPU, and I'm not sure one would really notice the change.
Even if you did, the next release of $OPERATING_SYSTEM would be yet more bloated and offset the potential advantage :-).
Steve