Cheetah Cub board

From: Doc Shipley <doc_at_mdrconsult.com>
Date: Wed Jun 9 19:59:24 2004

Steve Thatcher wrote:

> okay, 16 - 256kx1 chips will not give you 2meg... it is only 0.5meg. If the docs you have say 256kx4 then that is the chip you need and the ones on the ISA board are not the right ones.
>
> the 256Kx4 DYNAMIC ram chips that you would need were usually used in VGA cards for display memory.

   Yes, I actually found the chips I need for the Amiga on a couple of
busted MCA graphics boards. No ROMs on either, and one looks like
somebody practiced their solder-sucking on it, so I'm not killing good
kit for them.

   After physically looking at the A2091, I also found that it wants
20-pin DIPs, not 16-pin DIPs. :)

   This upgrade isn't really just a system RAM boost. The A2091 SCSI
chip can't write to the GVP 32-bit RAM in that box, so it's doing
programmed-I/O transfers. At roughly 80MB/hour, disk-to-disk. The
on-board 16-bit memory will allow it to breathe. I hope.

   Thanks, Steve, Tony, Bill, Brian, Gene, and everybody for the
tutorial. It helped a lot. Now, instead of being afraid to pick up the
gun, I can go shoot off some toes.


        Doc
Received on Wed Jun 09 2004 - 19:59:24 BST