VOGONS


How about a MR-BIOS ROM file repository?

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Reply 40 of 385, by Auzner

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Thanks for the advice everyone. I will try dumping it again tonight as if it were a 28-pin 27c256:

Screen Shot 2018-03-22 at 12.36.21 PM.png
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All these variants of the 28-pin!

512.png
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Last edited by Auzner on 2018-03-22, 21:19. Edited 1 time in total.

Reply 41 of 385, by keropi

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^ better try as 27C512 and see if you get duplicate data (2x32kb data)

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Reply 42 of 385, by Anonymous Coward

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In my experience, almost all 386 BIOSes that use a single chip are the 512kbit variety.

"Will the highways on the internets become more few?" -Gee Dubya
V'Ger XT|Upgraded AT|Ultimate 386|Super VL/EISA 486|SMP VL/EISA Pentium

Reply 44 of 385, by Anonymous Coward

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yup

"Will the highways on the internets become more few?" -Gee Dubya
V'Ger XT|Upgraded AT|Ultimate 386|Super VL/EISA 486|SMP VL/EISA Pentium

Reply 45 of 385, by appiah4

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Just dropping these two MR BIOS manuals here, I harvested them from the eSolutions web site; still poking and trying to find a way to get to the BIOS files 😎

I have a board from 1991 with the MR BIOS on it, would anyone wager a guess as to what the HDD size limitation would be? I'll get a CF card of the according size. I'm thinking of playing it safe and going with 512MB which should be plenty enough for a DX2-66.. But if I can get away with 1 or 2GB, why not?

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    mrb33x.zip
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  • Filename
    mrb166.zip
    File size
    75.28 KiB
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    167 downloads
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Retronautics: A digital gallery of my retro computers, hardware and projects.

Reply 47 of 385, by feipoa

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512 MB ok for your DX2-66 system? I need at least 2 GB. I use SCSI so the onboard BIOS limit is unimportant.

Plan your life wisely, you'll be dead before you know it.

Reply 48 of 385, by Anonymous Coward

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appiah4 wrote:
I am going to build a system with this board sometime in the near future, I will try to dump the bios with uniflash.. […]
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I am going to build a system with this board sometime in the near future, I will try to dump the bios with uniflash..

Octek_Hippo_VL_DCA.jpg

For now, please see attached the copies I found of the latest and large HDD patched Mr BIOS bioses.

This board is supposedly based on Headland HT 340 "SHASTA" or possibly Opti 82C802G . Can you confirm which?

"Will the highways on the internets become more few?" -Gee Dubya
V'Ger XT|Upgraded AT|Ultimate 386|Super VL/EISA 486|SMP VL/EISA Pentium

Reply 49 of 385, by keropi

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and why use uniflash for this? if the board runs then NSSI is better to make a BIOS dump

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Reply 51 of 385, by keropi

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not having to remove the IC and inserting it to a NIC to do the job?

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Reply 53 of 385, by appiah4

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Anonymous Coward wrote:
appiah4 wrote:
I am going to build a system with this board sometime in the near future, I will try to dump the bios with uniflash.. […]
Show full quote

I am going to build a system with this board sometime in the near future, I will try to dump the bios with uniflash..

Octek_Hippo_VL_DCA.jpg

For now, please see attached the copies I found of the latest and large HDD patched Mr BIOS bioses.

This board is supposedly based on Headland HT 340 "SHASTA" or possibly Opti 82C802G . Can you confirm which?

It has the Headland chipset.

Retronautics: A digital gallery of my retro computers, hardware and projects.

Reply 54 of 385, by Anonymous Coward

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Were there other 486 boards that used the HT340 chipset? Do they work with EDRAM as well?

"Will the highways on the internets become more few?" -Gee Dubya
V'Ger XT|Upgraded AT|Ultimate 386|Super VL/EISA 486|SMP VL/EISA Pentium

Reply 55 of 385, by appiah4

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Anonymous Coward wrote:

Were there other 486 boards that used the HT340 chipset? Do they work with EDRAM as well?

This I do not know I only have experience with this one board.

Retronautics: A digital gallery of my retro computers, hardware and projects.

Reply 56 of 385, by Auzner

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Here's the correct binary for the Forex 300 MR BIOS as a 27C512 (64kB as opposed to the 16kB)

27c512.PNG
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Just recently I got several other motherboards so I ordered a USB programmer.

Motherboard photo:
download/file.php?id=42321&mode=view

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Reply 57 of 385, by keropi

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thanks for the update Auzner - I'll fix my post with the new dump 😀

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Reply 58 of 385, by Anonymous Coward

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I think I finally tracked down the BIOS image for Macronix 305/306. It's for the Octek Jaguar V. It came from a Russian Hardware Museum site.

http://hwmuseum.pp.ua/index.php?route=hardware&dev=3

I think this image is actually floating around as an attachment on vogons somewhere, but it hasn't been added yet.

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"Will the highways on the internets become more few?" -Gee Dubya
V'Ger XT|Upgraded AT|Ultimate 386|Super VL/EISA 486|SMP VL/EISA Pentium

Reply 59 of 385, by keropi

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thanks Anonymous Coward , added the BIOS image in the 2nd post list

🎵 🎧 PCMIDI MPU , OrpheusII , Action Rewind , Megacard and 🎶GoldLib soundcard website