Probaby you can use any generic 2MBit Flash (with 256k x 8bit organization). Programer of choice is ofcourse TL866 😀

Do you have another graphics card (ISA, PCI) and good known PSU to check before ?
ISA/PCI POST card is also nice-to-have for diagnosing.

Mazinfriki wrote on 2021-06-14, 12:11:

I still have the manual from it and found the reset CMOS jumper; after resseting it usually throws long beeps or five short beeps.

What does the manual say those "beep codes" represent? I think 5 short = possible CPU failure.

Are the physical basics all good e.g. good CMOS battery, CPU heatsink + fan?

I'll have to check it as I don't have it here but if I remember well the manual does not contain the beep codes. Anyway I tested it with three different CPU.

zyga64 wrote on 2021-06-15, 07:50:

Probaby you can use any generic 2MBit Flash (with 256k x 8bit organization). Programer of choice is ofcourse TL866 😀

Do you have another graphics card (ISA, PCI) and good known PSU to check before ?
ISA/PCI POST card is also nice-to-have for diagnosing.

TL866 doesn't have this eeprom in its supperted list, that's why I'm asking in case anyone has used this or another programmer. Don't want to buy one and see it's not compatible 🙁

Battery is brand new. I've tested several PCI cards and two different power supplies; I think I also have a ISA vga - I'll test the machine with it, too.

What about the compatibility list for the TL866 II or their even newer one?

cyclone3d wrote on 2021-06-15, 16:54:

What about the compatibility list for the TL866 II or their even newer one?

I meant TL866 II. There are several intel chips with similar names but not specifically that one.

I have no knowledge about those programmes so I don't know if you can add a "custom" chip based on its datasheet... is this possible?

There's almost no information about it apart of the datasheet and a post in this forums from other user.

I found this adapter https://www.sivava.com/index.php?route=produc … t&product_id=23 it mentions willem eeprom programmer. That programmer seems to be more expensive than others so it would cost me more than a new board 🙁

This Intel flash is somewhat specific (12V programming voltage, bootblock position and size etc.). In this crossreference i.e. there is no direct replacements from SST.
You mentioned that you have user manual for this board. Please check if you can use another flash instead.
I remember that on Socket 7 Shuttle boards there was jumper for choosing type of flash memory marked as 5V/12V or Intel Flash/something else...
There were even different BIOS for different flash chips.

BTW. I have TL866A and Willem programer 😀 Willem is connected through parallel LPT port. So your computer must have LPT port.

zyga64 wrote on 2021-06-17, 08:20:

This Intel flash is somewhat specific (12V programming voltage, bootblock position and size etc.). In this crossreference i.e. t […]
Show full quote

This Intel flash is somewhat specific (12V programming voltage, bootblock position and size etc.). In this crossreference i.e. there is no direct replacements from SST.
You mentioned that you have user manual for this board. Please check if you can use another flash instead.
I remember that on Socket 7 Shuttle boards there was jumper for choosing type of flash memory marked as 5V/12V or Intel Flash/something else...
There were even different BIOS for different flash chips.

BTW. I have TL866A and Willem programer 😀 Willem is connected through parallel LPT port. So your computer must have LPT port.

Thank you I'll take a good look at the manual.
LPT should not be a problem as I have lots of other old pc's.

zyga64 wrote on 2021-06-17, 08:20:

BTW. I have TL866A and Willem programer 😀 Willem is connected through parallel LPT port. So your computer must have LPT port.

Hi zyga64,

I've checked with the manual and it states nothing about changing the bios and the board does not have any unrecognized jumpers.

You mention this bios has specific features. I don't know much about programmers. Do you think it's theoretically possible to use TL866A to use it with this chip directly?

I'm afraid that choosing another similiar memory type may not work in this case 🙁
You may try however to buy another similiar supported memory like AM29F002 or M29F002 or AT49F002 with "top" bootblock location and try to use it.

What else comes to my mind. If bootsector isn't broken, you may prepare MS-DOS bootdisc with:
- awdflash/amiflash/uniflash ( regarding to BIOS type)
- actual working bios image
- 'autoexec bat' with one command, which will start flashing program with bios image as a parameter and the rest...

zyga64 wrote on 2021-06-20, 11:04:

You may try however to buy another similiar supported memory like AM29F002 or M29F002 or AT49F002 with "top" bootblock location […]
Show full quote

You may try however to buy another similiar supported memory like AM29F002 or M29F002 or AT49F002 with "top" bootblock location and try to use it.

What else comes to my mind. If bootsector isn't broken, you may prepare MS-DOS bootdisc with:
- awdflash/amiflash/uniflash ( regarding to BIOS type)
- actual working bios image
- 'autoexec bat' with one command, which will start flashing program with bios image as a parameter and the rest...

Those chips you mention are 32 pin chips. Do you mean plugging them directly without an adapter?

I have a couple of 32 pin bios chips (not sure if these ones). If I plug them and test would there be any damage to motherboard/chip?

Is there any key combination for invoking bootblock before reading the rest of the bios?

Oops... You are right. Pinout is totally different. Shame on me...
They "may" work on your board with oposite adapter (to this Willem one).

I don't know about bootblock keyboard shortcuts 🙁
I only remember that for some older Toshiba laptops there was LPT/Parallel plug for invoking flashing from bootblock (on bricked laptop).

For this moment I'm out of ideas...

Just an update on this topic - I found a replacement chip on a german web shop http://www.chip-service.de/product_info.php?i … eplacement.html They also program the bios of your choice into the chip.

Just one weird thing : The chips I received does not look like the one in the photo but are completely identical to the old chips - if these are replicas they did the job extremely well!

Anyway My machine is running again and I'm happy 😀