I've never tried 2MB ones, but filling eight 30-pin SIMM slots with 12MB would be a convenient way to stay under the 16MB limit I mentioned above.
MikeSG wrote on 2024-06-03, 07:38:The ALI M1217 / M6117d chipset is a 386 based system that supports EDO & FP DRAM. https://theretroweb.com/chipset/documentation […]
The ALI M1217 / M6117d chipset is a 386 based system that supports EDO & FP DRAM. https://theretroweb.com/chipset/documentation … 14522658385.pdf
Supports 16MB SIMMs as well surprisingly.
"The DRAM controller supports Fast Page Mode DRAM
and EDO DRAM.The DRAM controller is capable of
accessing up to 64 MBytes of local memory, and
supporting four banks page interleave of DRAM using
256K, 512K, 1M, 2M, 4M, 16M single sided SIMMs"
Sure, the chipset can support 72-pin EDO. But the question is did 30-pin EDO SIMMS ever exist/were used in PCs.
kingcake wrote on 2024-06-03, 23:16:MikeSG wrote on 2024-06-03, 07:38:The ALI M1217 / M6117d chipset is a 386 based system that supports EDO & FP DRAM. https://theretroweb.com/chipset/documentation […]
The ALI M1217 / M6117d chipset is a 386 based system that supports EDO & FP DRAM. https://theretroweb.com/chipset/documentation … 14522658385.pdf
Supports 16MB SIMMs as well surprisingly.
"The DRAM controller supports Fast Page Mode DRAM
and EDO DRAM.The DRAM controller is capable of
accessing up to 64 MBytes of local memory, and
supporting four banks page interleave of DRAM using
256K, 512K, 1M, 2M, 4M, 16M single sided SIMMs"Sure, the chipset can support 72-pin EDO. But the question is did 30-pin EDO SIMMS ever exist/were used in PCs.
This is a case where a computer shopper from 1996 would be helpful.
I do vaguely remember 30 pin EDO being in the back of the shopper from the strange off brand places that just had a big list of buy/sell ram. I also know that a few of the PCCHIPS boards that had 4 30 pin and 2x 72 pin SIMMs would have supported EDO.
The reality is a why bother situation?
I can only guess that if it did exist it would be for a very limited time for special applications like appliances, printers and embedded.
Now for a more important thought, why was 30pin ram developed in the first place?
Historically even in its first applications it was noted that it was already obsolete and cumbersome to use in 32 bit applications. Compaq and other OEMs adopted 30 pin memory for 16 bit applications before 32 keeping 32 bit systems using proprietary modules due to cost and integration concerns well into the early 90’s.
It was only used in 2 XT class systems that I am aware of so what was the point of 8 bit 30 pin simms when everything was 16+ and what is its development history at wang labs?
