Hi, I'm practical new to this, because I forgot the first steps I did in Computing from 1998 to early 2000, when I bought in March a Medion MT4(?) Pentium III 667 MHz, 256Mb RAM with a Medion MD2000 Mainboard, which is comparable with a MSI MS-6318. Today I bought a similar Computer again, a Medion MT24, Pentium II 400MHz, 512MB RAM, with an Intel SR440BX Mainboard, 5,25" Floppy-Drive (Teac FD-55GFR) and a shared PCI/ISA Slot (and I think three additional PCI Slots), onboard RivaTNT AGP and Soundblaster (ISA?). It will hopefully arrive next Wednesday.
But back to Topic. I don't have any RAM for the 486-GIO-VT, and now I'm curious, if I need Parity RAM, why FPM SIMMs are called DRAM-Configuration and all that stuff. I want to buy 16Mb 72Pin SIMMs. In the manual they mention that double-RAS SIMM are causing issues with Bank 0, or 1. So I'm wondering how to tell a RAM is "double-RAS". Also I'm wondering, if it may be possible to use 64MB RAM or 128MB RAM FPM SIMMs, because in mobile/cell phones one can also exceed sometimes the capacity of sdcards in manual description. In the description it's limited to 32MB SIMMs, that can be used sort of. But the highest configuration of 96MB comes without any 32MB, but 16MB SIMMs. So I guess my Idea, that the board may can cope with 64MB or 128MB is naive.
Edit: Found a Thread on that topic: 72 pin SIMM brand recommendations or just get whatever (486 build)?
and What ram to use in a 486 build ?
DRAM is all the volatile Dynamic RAM, if 30-pin SIMM or 72-pin. Cache Memory may is different? So I can use Parity or non-parity RAM, and I have to be carefully with double-sided RAM.
2.19 What are "single-sided" and "double-sided" 72-pin SIMMs?
[From: rbean@execpc.com (Ron Bean)] All 72-pin SIMMs are 32 bits wide (36 with parity), but double-sided SIMMs have four RAS (Row Address Strobe) lines instead of two. This can be thought of as two single-sided SIMMs wired in parallel. But since there is only one set of data lines, you can only access one "side" at a time. Usually, 1Mb, 4Mb, and 16Mb 72-pin SIMMs are single-sided, and 2Mb, 8Mb, and 32Mb SIMMs are double-sided. This only refers to how the chips are wired-- SIMMs that are electrically "single-sided" may have chips on both sides of the board. Most 486 motherboards use memory in banks of 32 bits (plus parity), and may treat a double-sided SIMM as "two banks" (see your motherboard's manual for details). Some can take four SIMMs if they're single-sided, but only two if they're double-sided. Others can take four of either type. Pentium (and some 486) motherboards use pairs of 72-pin SIMMs for 64-bit memory. Since double-sided SIMMs can only access 32 bits at a time, you still need to use them in pairs to make 64 bits.
https://stason.org/TULARC/pc/pc_hardware_faq/ … _pin_SIMMs.html
Also regarding EDO versus FPM-RAM I should go with FPM (Fast Page Mode memory, used in all 30-pin and early 72-pin modules).
Q. 77 Can EDO and Fast page mode (FPM) memories be operated simultaneously / mixed?
No. Extended Data Out (EDO) and Fast Page Mode (FPM) memory modules are not interchangeable. You must add the same type of storage to your system that is already in use.
https://www.eastcomp.de/memfaq/detaild575_full.html
Usually, EDO and FPM RAM memory bars fit in the same slots on the motherboard. However, there are mainboards that do not support EDO memories and address the EDO RAMs used as FPMs. Conversely, all FPM RAM modules also fit in EDO-supported mainboards. They are also backwards compatible.
https://www.it-service24.com/lexikon/e/edo-ram/
