fatest Agnus-2.0/2090
21-Dec-91 02:55:40
Sb: #18024-fatest Agnus-2.0/2090
Fm: Don Curtis/SYSOP 76703,4321
To: Terrence C. Payne 70003,2606
Terry,
I've done both:
To get the system to see the extra CHIP RAM, you've got to move one
jumper (Jumper Pad J101) from pins 1-2 to pins 2-3. You've also got to cut
the trace between Jumper Pad J500. JP 101 is located directly above the
68000 chip about even with the front edge of CN400 (the point where the
power supply plugs into the motherboard). J 500 (simply 2 pads with a
trace between them) is located slightly left of the front left corner of
the left 8520 CIA chip (U 301 I believe).
As to the installation of 2.0 on a 2090 equipped A2000 (or 2500 for
that matter)…I did the installation by hand since I'd made quite a few
changes from the "standard" setup. For example, I had very small OFS
filesystem partitions on my 4 HDs. I ended up re-PREPing the drives and
making the entire drive FFS.
BTW…on an A2500, you MUST replace the ROMs on the A2620 or A2630
board with Rev 6 or 7 ROMs. Those ROMs should be available at your
dealer's now, the list price is $33 for the ROMs.
Don