Upgrading GUS Classic to 1 MB? \ VOGONS

Upgrading GUS Classic to 1 MB?

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First post, by Subjunctive

Posted on 2012-02-21, 16:43

Subjunctive Offline

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I'd like to explore upgrading my GUS Classic to 1 MB. This is unrelated to my SC2 issue - in addition to gaming, I'll be using the card for music playback and maybe even composition; I've found that the standard 256k can fill up pretty easily.

A million years ago, I ran across an official Gravis list of approved brands/part numbers for additional RAM for the GUS Classic. I remember TI and NEC were among the brands listed. Would anyone happen to have this list? I assume it's been updated since then. And I know that any 80-ns 128k DRAM should work.

Last edited by Subjunctive on 2012-02-21, 19:52. Edited 1 time in total.

Reply 1 of 3, by Subjunctive

Posted on 2012-02-21, 17:59

Subjunctive Offline

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Posts: 83
Joined: 2007-10-31, 21:22
Location: Connecticut

It's not the list I remember, but I found some help in one of the old GUS Daily Digests:

http://www.gravisultrasound.com/files/UDD/vol … /1994-01-26.TXT

This is a list of vendors that make JEDEC standard 256Kx4 Fast Pagemode DRAMs. I am not saying that all of these will work in the GUS because the timing and power consumption of every vendors design is slightly different. Nor have I personally tested each of these vendors in the GUS ... This is only a cross reference list that I put together with a little research into various DRAM data books and the IC Master 1993 master selection guide. For simplicity, I am leaving the speed grade designation off (a -10, -8, -7, or -6 extension at the end of the part number).

1Manufacturer            Part Numbers of 256Kx4 Fast Pagemode DRAMs
2--------------------    ------------------------------------------
3Micron Semiconductor    MT4C4256
4AT&T                    M441024
5EDI                     EDI44256C
6Fujitsu                 MB81C4256P
7Goldstar                GM71C4256A
8Hitachi                 HM514256AP
9Hyundai                 HY51C4256 or HY53C4256
10Intel                   21014
11Mitsubishi              M5M44C256BP
12Mosel-Vitelic           V53C104
13Motorola                MCM514256AP
14NEC                     uPD424256C
15OKI                     MSM514256
16Panasonic               MN41C4256
17Samsung                 KM44C256BP
18Sharp                   LH64256
19Siemens                 HYB514256
20Texas Instruments       TMS44C256
21Toshiba                 TC514256BP