hunt@firqb.dec.com (Phil Hunt) (09/17/87)
What is the clock speed of the Mac II? Is it somewhere around 12 MHZ? My question is, can a 16.67Mhz 68020 and 68881 be plugged into the motherboard to execute about 20% faster if I tweek the clock up to 16.67Mhz??? Is there any timing problems (other than software loops that broke programs on the Mac II already anyway) to watch out for???? Just an interesting question.... Phil Hunt DEC Development
kateley@apple.UUCP (09/18/87)
munch...
The clock speed of the Mac II is 15.6672 MHz, so your already there.
The 68881 uses the same clock as well...
--
Jim Kateley
Applelink: kateley1
UUCP: {sun, voder, nsc} apple!kateley
CSNET: kateley@apple.COM
Disclaimer: All the usual stuff, I speak for myself, etc...
Remember: When you smile :-), the world smiles with you,
When you frown :-(, the world thinks you are hung over...jww@sdcsvax.UUCP (09/18/87)
According to the owner's manual, it's 15.6672 MHz. I'll
bet if you do the arithmetic, it's exactly twice the SE
and Mac Plus, and that there are chips on the motherboard
(such as the SCC??) that take an extra /2 on the clock
frequency as compared to the original Mac Plus design.
--
Joel West (c/o UCSD)
Palomar Software, Inc., P.O. Box 2635, Vista, CA 92083
{ucbvax,ihnp4}!sdcsvax!jww jww@sdcsvax.ucsd.edu
or ihnp4!crash!palomar!joel joel@palomar.cts.com