Radeon 9100 that I can't flash

[indibil]

Hello.

I recently acquired this 64MB Radeon 9100 (equivalent to a Radeon 8500LE), and just like I did with another 9100, I decided to flash it.



The previous one worked with the original ROM by adjusting the speeds to 250/250.

This graphics card came with a 64KB EEPROM, a PM39LV512, and since the original ROM is 128KB, I flashed it onto an AM29F010. I verified that the extra pin was traced on the PCB, and it was; it's routed.

After soldering the EEPROM and installing it in a G4 GE, which now has a flashed 8500, there's no image. Using an ATI Rage Pro PCI card, I can access the system profile and view the information, but it doesn't match what the 8500 displays.

Working Radeon 8500:



Radeon 9100 flashed:


Does anyone have the ability to review the two dumps I've attached and see if there are any incompatibilities? I also have the ROM that @joevt modified many years ago, but I don't know if it would be more compatible or if they're similar. I'm attaching it as well.

Thanks.

 

[joevt]

Looks like the ROM did not get applied correctly? Can you use a flashing utility to read the ROM?
What does .properties show for the GPU in Open Firmware?
Does it show that a PCI Option ROM exists and is 128K? If so, can you map it in Open Firmware and dump the hex?

 

[indibil]

Looks like the ROM did not get applied correctly? Can you use a flashing utility to read the ROM?
What does .properties show for the GPU in Open Firmware?
Does it show that a PCI Option ROM exists and is 128K? If so, can you map it in Open Firmware and dump the hex?

Thanks for replying.

Before seeing your response, I decided to flash the original PC ROM to a 128kb EEPROM to see what Apple System Profiler would show, and it shows exactly the same thing as with the Mac ROM we saw earlier.



I use an Ati Rage Pro 1128 PCI to be able to view the 9100 AGP.

I used a 128kb EEPROM to try to patch it with the update released by ATI, but it doesn't work, and sometimes it shows this error:



Next, I performed a DUMP from OS9 using "ATI Multi Dumper", both from the PC ROM and the Mac ROM, soldered onto the board.



I've attached the files, but I think I've already located the problem: it's only accessing 64kb of the EEPROM, even though it has a 128kb chip.

On the PCB, there's a trace coming from pin A16, the only additional pin compared to the 64kb EEPROM, but I don't know where it should go.


Do you know where this A16 pin should be connected?