Bill Layer wrote:
> > My plan now is to
> >beef up the IIci with the accelerator, more memory, a video
> >card and I'll have a neat, small 68K-based Mac II to play with.
> >I will be limiting the mac side of my collection to a Classic II,
> >an SE/30, the accelerated IIci and an 8100.
>
> Does the accelerator solve the memory addressing problems in the IIc
> series? These models have 2MB of RAM built-on , plus two 30-pin sockets
> which will take 4MB SIMMS. Problem is, even with two 4MB SIMMS installed,
> the machine will only recognize a total of 10MB of RAM, not the 12MB that
> is physically present.
>
> If that 68030 accelerator card also comes bearing an 68882 FPU, the system
> can then be used to run NetBSD (one of the free UNIX-like operating
> systems). For that matter, it might also run the M68K linux, but on 10MB
> I'm not sure how these systems will perform. FWIW, the SE/30 will also run
> NetBSD, and that model can easily be expanded to 32 or 64MB of RAM.
Well, I've just assembled a IIci system with the accelerator
(btw, it is a 33MHz 68040, not a 68030). The "happy mac" icon
that shows up when the mac finds a system disk also says "Turbo 40"
or some such. The IIci doesn't have any built-in RAM, but it does
have eight 30pin SIMM sockets. I put 4x4MB + 4x1MB for the time being,
and under 7.0.1 it does find all 20Megs. I timed the machine
from the moment the turn-on chime sounds until it finishes booting
(using a 2GB Seagate drive): Twenty seconds. Sweet :-) . And it
even loads six or seven extensions. I added an Asante NIC, a GPIB
board by National Instruments, and a Rasterops video card that
also has an S-video connector. I'll have to install the GPIB
software and find out about other OS; I think that 8.1 was the
last one that ran in 68040-based machines, and 7.6.1 the last
one which ran on older macs.
There is also one 72 pin SIMM socket in the mainboard next to the
cache slot (which is where the accelerator goes). I wonder what it is
for...
--
Carlos Murillo-Sanchez email: cem14_at_cornell.edu
428 Phillips Hall, Electrical Engineering Department
Cornell University, Ithaca, NY 14853
Received on Thu Oct 19 2000 - 15:51:58 BST