I may be asking a stupid question.
It occurred to me that the Radeon 9250 PCI vga has 2 PI5C 16211 bus adapter ICs on the PCB.
Don't these also do 3.3V/5V I/O signal level matching?
I recently tried a Radeon 9250 PCI card in a Firebird A4000 rev1 (Altera) daughterboard.
The VGA card failed after a short period of use.
Does the 3.3V support only apply to the power supply or to the data lines as well? Could it be that the Firebird daughterboard used a 5V data line for this...
I bought a Voodoo 3 card with which the Firebird PCI works perfectly.
The daughterboard is a very nice, high-quality assembly.
I use a mix of 3.3V and 5V cards in it.
Thank you very much.
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