It looks like you only drop in the chips and it'll work, I definitely see no reason it wouldn't. I have done similar on an earlier Oak chip with success.

appiah4 wrote on 2026-08-10, 07:52:

The Diamond Viper PCI (Weitek 9000) has a OTI807X to handle 2D DOS tasks but this part of the card is pretty crippled, running w […]
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The Diamond Viper PCI (Weitek 9000) has a OTI807X to handle 2D DOS tasks but this part of the card is pretty crippled, running with only an 8-bit 256K RAM. Checking the card's specs, it can also run with 512K 16-bit and 2MB 32-bit RAM configurations. This card comes with 2 256x4 RAMs and unpopulated footprint for 2 more unpopulated ram chips. I am wondering if anyone tried adding two more 256Kx4 RAM to it and upgrading it to 16-bit? I would think this would CONSIDERABLY improve its 2D DOS performance?

You can try to solder two sockets and install two more chips
Anyway I don't think you got real DOS performance boost
It GUI accelerator with very limited DOS support

Tiido wrote on 2026-08-10, 13:49:

It looks like you only drop in the chips and it'll work, I definitely see no reason it wouldn't. I have done similar on an earlier Oak chip with success.

Thank you, I will try this and report back with how much the performance improvement will be..

https://youtu.be/srht2WdXuWI?si=l8pl_IbNaOZJVKe3

Babasha wrote on Yesterday, 10:46:

https://youtu.be/srht2WdXuWI?si=l8pl_IbNaOZJVKe3

I have seen this video before, that card already comes equipped with 512KB 16-bit memory, making me believe this is fairly doable..

More interesting part is to use P9000 for DOS gaming

Babasha wrote on Yesterday, 16:15:

More interesting part is to use P9000 for DOS gaming

A lot of the VESA mode hacks he is using require a scaler. Forcing Weitek 9000 to handle DOS VESA modes and using VESA 320x200 mode is interesting though.

appiah4 wrote on Yesterday, 20:49:

Babasha wrote on Yesterday, 16:15:

More interesting part is to use P9000 for DOS gaming

A lot of the VESA mode hacks he is using require a scaler. Forcing Weitek 9000 to handle DOS VESA modes and using VESA 320x200 mode is interesting though.

Scaler or one of the rather rare 15khz - 42khz ish VGA multisync monitors