🚀 go-pugleaf

   I have been keeping tabs on 68030 upgrades and coprocessors for the Mac,
some information I just got from Dove makes for an interesting comparison
with the recent Apple prices. They are making something to replace the 68020
in a II with a 68030 running at 20 Mhz ($999), 25 Mhz ($1299), or
33 Mhz ($1599). Supposed to ship in mid-October.
   What I wonder, though, is just how much performance you can get from the
faster clock speed, given that most macs have 120 ns rams? I asked about this,
and was told that the 25 and 33 Mhz models would run with 1 wait state using
120 ns memory, and 0 wait states with 100 or 80 ns memory. Is there anyone
out there with some 68030 hardware knowledge who can say if this is
reasonable? I though that Mac II's had two wait states built in (it may only
be one). If they do change the wait states for RAM access, does that mean
they have to modify the logic board for the upgrade? Or is it something
simple like a jumper? I don't know mac hardware, and the salesperson did not
seem cognizant of all the details.

   Also, I have wondered if anyone sells the PC boards that make up SIMMs?
I'm crazy enough to buy DIPs and solder them in.  It may be the only way
to get fast memory at a reasonable price.

   Willard Korfhage

   ARPA : korfhage@cs.ucla.edu
   UUCP : {ucbvax,ihnp4,randvax,trwrb!trwspp,ism780}!ucla-cs!korfhage