A4000 MOTHERBOARD 16MB FAST WITH 2 SIMMS
A4000 Rev B has following SIMM
slots CHIP, BANK 0, BANK 1, BANK 2 and
A4000cr Rev D has following SIMM
slots BANK 0, BANK 1, BANK 2 and BANK 3
Both of them I have tested to be able
work with two 8MB simms.
- A4000 motherboard
- 8MB SIMMs (both single sided
and double sided will do)
Remove SIMMs from BANKs 0, 1, 2 and 3.
Add 8MB SIMM memory to
BANK 1 and BANK 3.
BANK numbers are on silkscreens between the slots (not visible in this
picture because they are under SIMMs).
BANK 3 and BANK 1 are the first and the third slot counted from
motherboard left edge regardless if CHIP slot is present or not.
This is very handy solution if you happen to have physically broken or
corroded BANK 0 and BANK 2. It should also consume less power since
there are less SIMMs consuming electricity. :)
The SIMMs I use here are 60ns. You could also use 50ns 8MB, but I have
never seen 50ns SIMMs that are smaller than 64MB.