Voodoo1, Voodoo2 - minor additions/changes \ VOGONS

Voodoo1, Voodoo2 - minor additions/changes

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First post, by Postman5

Posted on 2025-06-15, 22:51

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Replacing the QS5244 buffer chip on the Voodoo2 Diamond Monster with a 74AS244.
This does not provide any advantages, I just did not have new QS5244.
It was necessary to slightly change the values of some resistors:
R148 75R -> 330R...360R
R153 0 R -> 33 R
axial lead resistor 221 R -> remove
Now this part of the circuit is the same as most Voodoo2

Reply 1 of 6, by Postman5

Posted on 2025-06-16, 11:21

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Voodoo2
The indicator shows when Voodoo is active and generating an image on the monitor.

Reply 2 of 6, by Postman5

Posted on Yesterday, 09:02

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Voodoo1 Diamond
The indicator shows when Voodoo is active and generating an image on the monitor.

Reply 3 of 6, by Postman5

Posted on Yesterday, 10:22

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Voodoo1 Diamond mod 6MB

Reply 4 of 6, by analog_programmer

Posted on Yesterday, 10:44

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Well done! Your mod seems like much cheaper, cleaner and simpler, than BuB's 6 and 8 MB Voodoo1 memory mods.

But do these memory modifications improve something for real, except the support for bigger textures (??) or/and for 800x600 resolution, which seems too much for Voodoo1 card?

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Reply 5 of 6, by Postman5

Posted on Yesterday, 11:22

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analog_programmer wrote on Yesterday, 10:44:

Well done! Your mod seems like much cheaper, cleaner and simpler, than BuB's 6 and 8 MB Voodoo1 memory mods.

But do these memory modifications improve something for real, except the support for bigger textures (??) or/and for 800x600 resolution, which seems too much for Voodoo1 card?

Increasing texture memory (TMU) to 4 MB in the 3DMark99 test adds 10-12%
Increasing memory in frame memory (FBI) seems useless to me.

Reply 6 of 6, by DrAnthony

Posted on Yesterday, 13:03

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Postman5 wrote on Yesterday, 11:22:

analog_programmer wrote on Yesterday, 10:44:

Well done! Your mod seems like much cheaper, cleaner and simpler, than BuB's 6 and 8 MB Voodoo1 memory mods.

But do these memory modifications improve something for real, except the support for bigger textures (??) or/and for 800x600 resolution, which seems too much for Voodoo1 card?

Increasing texture memory (TMU) to 4 MB in the 3DMark99 test adds 10-12%
Increasing memory in frame memory (FBI) seems useless to me.

Agreed, the hardware barely has the fillrate for 640x480, anything above that is only going to be pain.

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