VOGONS


How about a MR-BIOS ROM file repository?

Topic actions

Reply 40 of 184, by Auzner

User metadata
Rank Member
Rank
Member

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
Filename
Screen Shot 2018-03-22 at 12.36.21 PM.png
File size
166.08 KiB
Views
1270 views
File license
Fair use/fair dealing exception

All these variants of the 28-pin!

512.png
Filename
512.png
File size
84.49 KiB
Views
1255 views
File license
Fair use/fair dealing exception
Last edited by Auzner on 2018-03-22, 21:19. Edited 1 time in total.

Reply 41 of 184, by keropi

User metadata
Rank l33t++
Rank
l33t++

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

🎵Link to buy a PCMIDI mpu
🎧Orpheus soundcard project
💻WTB Amstrad PC7486SLC-33 system

Reply 42 of 184, by Anonymous Coward

User metadata
Rank l33t
Rank
l33t

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 43 of 184, by feipoa

User metadata
Rank l33t++
Rank
l33t++

And 256kbit was largely for VGA ROM's?

Ultimate 486 Benchmark | Ultimate 686 Benchmark | Cyrix 5x86 Enhancements | 486 Overkill Graphics | Worlds Fastest 486

Reply 44 of 184, by Anonymous Coward

User metadata
Rank l33t
Rank
l33t

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 184, by appiah4

User metadata
Rank l33t++
Rank
l33t++

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?

Attachments

  • Filename
    mrb33x.zip
    File size
    1.8 MiB
    Downloads
    61 downloads
    File license
    Fair use/fair dealing exception
  • Filename
    mrb166.zip
    File size
    75.28 KiB
    Downloads
    58 downloads
    File license
    Fair use/fair dealing exception

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

Reply 47 of 184, by feipoa

User metadata
Rank l33t++
Rank
l33t++

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

Ultimate 486 Benchmark | Ultimate 686 Benchmark | Cyrix 5x86 Enhancements | 486 Overkill Graphics | Worlds Fastest 486

Reply 48 of 184, by Anonymous Coward

User metadata
Rank l33t
Rank
l33t
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?

"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 184, by keropi

User metadata
Rank l33t++
Rank
l33t++

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

🎵Link to buy a PCMIDI mpu
🎧Orpheus soundcard project
💻WTB Amstrad PC7486SLC-33 system

Reply 50 of 184, by feipoa

User metadata
Rank l33t++
Rank
l33t++

Do you know what the benefits of NSSI copying a BIOS is compared to Uniflash?

Ultimate 486 Benchmark | Ultimate 686 Benchmark | Cyrix 5x86 Enhancements | 486 Overkill Graphics | Worlds Fastest 486

Reply 51 of 184, by keropi

User metadata
Rank l33t++
Rank
l33t++

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

🎵Link to buy a PCMIDI mpu
🎧Orpheus soundcard project
💻WTB Amstrad PC7486SLC-33 system

Reply 52 of 184, by feipoa

User metadata
Rank l33t++
Rank
l33t++

Doesn't uniflash work with most PC BIOSes in the computer?

Ultimate 486 Benchmark | Ultimate 686 Benchmark | Cyrix 5x86 Enhancements | 486 Overkill Graphics | Worlds Fastest 486

Reply 53 of 184, by appiah4

User metadata
Rank l33t++
Rank
l33t++
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 184, by Anonymous Coward

User metadata
Rank l33t
Rank
l33t

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 184, by appiah4

User metadata
Rank l33t++
Rank
l33t++
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 184, by Auzner

User metadata
Rank Member
Rank
Member

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

27c512.PNG
Filename
27c512.PNG
File size
45.83 KiB
Views
1051 views
File license
Fair use/fair dealing exception

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

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

Attachments

  • Filename
    forex300.zip
    File size
    41.84 KiB
    Downloads
    55 downloads
    File license
    Fair use/fair dealing exception

Reply 57 of 184, by keropi

User metadata
Rank l33t++
Rank
l33t++

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

🎵Link to buy a PCMIDI mpu
🎧Orpheus soundcard project
💻WTB Amstrad PC7486SLC-33 system

Reply 58 of 184, by Anonymous Coward

User metadata
Rank l33t
Rank
l33t

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.

Attachments

"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 184, by keropi

User metadata
Rank l33t++
Rank
l33t++

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

🎵Link to buy a PCMIDI mpu
🎧Orpheus soundcard project
💻WTB Amstrad PC7486SLC-33 system