First post, by lavadrop
Unfortunately, my Gemlight GMB-486UNP only recognizes 3 of the 4 sticks of RAM I have, Goldstar GM71c4400ALJ70 .
After browsing ebay, I've located several options:
- Newly made with old stock chips, 30 pin, 4 or 16 Mb kit (4 sticks, 1 or 4 Mb per stick), 60 ns, without parity.
- Old sticks, 30 pin, 70 ns, with parity mostly 4 Mb configurations.
- Old Macintosh memory with PC specs (30 pin, 70 ns, no parity)
I have no idea if this motherboard supports EDO or FPM. The manual does not state which kind of memory it takes, only their sizes and physical placement on the banks according to capacity.
I'm targetting 8 Mb or 16 Mb depending on availability. My system is a 486 DX2/66 with MS-DOS 6.22.
Is it really that important to avoid mixing sticks from different manufacturers?
Is it really important to have parity? Are memory errors that common on these old systems?
What would you search for?