Quick question: Does the MSI MS4144 support EDO-RAM? Or just FPM-RAM? The manual doesn't give any useful information on this.
EDIT: MS4144 revision 2.1 with Sis-chipset
Might depend on the revision of the chipset. But mine (board rev 2.1 and chipset NV/NU) does not.
mpe wrote on 2020-10-01, 22:05:Might depend on the revision of the chipset. But mine (board rev 2.1 and chipset NV/NU) does not.
Good point. I forgot to mention that I also have Revision 2.1. I guess I'll order FPM-RAM then 😀.
In my experience i have had luck with only one UMC based PCI 486 board that was EDO friendly. All other many dozens of 486 computers have crapped out.
I am aroused about any X86 motherboard that has full functional ISA slot. I think i have problem. Not really into that original (Turbo) XT,286,386 and CGA/EGA stuff. So just a DOS nut.
PS. If I upload RAR, it is a 16-bit DOS RAR Version 2.50.
This SiS chipset is supposed to support it, but yeah support on paper is different than real life support ^^
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It sometimes depends on simm count, capacity , brand.
I had an old 5x86 that would take any combination of Simms rock solid.
I had a late DX4 that one edo simm would work, install another identical it worked.
Install two different size EDO Simms and crash
32mb edo crash, 16mb fine, FPM fine In any size/combination
Reminds me of old Pc100 sdram some were just unstable
Well there are two things:
1. EDO SIMM tolerance (meaning EDO SIMMs could be used in place of FPM)
2. EDO SIMM support (chipset activelly uses EDO burst cycles).
I believe my MS4144 and many late 486 boards (but not all of them) can be used with EDO, but doesn't support EDO burst cycles (there is no performance benefit when using them).
In fact I believe the EDO tech is a kind of pointless for a normal non-overclocked 486 as most motherboards usually can achieve x-2-2-2 with 60ns SIMMS regardless of the RAM type used. In fact even when overclocking and 40/50 MHz bus many quality 486 boards usually tolerate fastest RAM cycle just fine (unlike L2 cache cycles which often have to be reduced). This is similar to reason why there are no boards with pipelined burst SRAMs for 486 as they offer no benefits and they would be actually slower than asynchronous SRAMs at 486 bus speeds.
rmay635703 wrote on 2020-10-02, 10:54:It sometimes depends on simm count, capacity , brand. […]
It sometimes depends on simm count, capacity , brand.
I had an old 5x86 that would take any combination of Simms rock solid.
I had a late DX4 that one edo simm would work, install another identical it worked.
Install two different size EDO Simms and crash
32mb edo crash, 16mb fine, FPM fine In any size/combinationReminds me of old Pc100 sdram some were just unstable
Was this 32MB single SIMM or 2x16MB double SIMM that crashed?
Was this 16MB single SIMM or 2x8MB double SIMM that ran fine?
