On May 8, 15:24, Robert F Schaefer wrote:
> I'll spend a little more time looking into that. I believe the ealier
PIs
> take standard parity SIMMs, but I thought the 4D/35s take a differrent
SIMM
> from everything else. Be nice if I could bump them up to 8 MB.
Yes, the early PI's take standard 30-pin SIMMs.
To upgrade Indigo 4MB SIMMs, you need to find eight 514400 (or equivalent)
80ns DRAMs in 26/20-pin SOJ package, and eight SMD decoupling capacitors
(sorry, don't remember the value but such caps are usually about
100-200nF). The capacitors are fitted in positions marked C3, C4, C8, C9,
C12, C13, C17, C18 on the DRAM side, before the DRAMs (which cover them).
I thought I remebered changing a resistor on the other side (ASIC side) but
I just compared a 4MB to an 8MB, and they have the same resistors, so I
must have been thinking of something else.
--
Pete Peter Turnbull
Network Manager
University of York
Received on Wed May 08 2002 - 15:38:00 BST