There were three revisions of the Beige G3 ROM: -A (LROG434-01/02), -B (LROG434-02) and -C (LROG434-03), and all with part no 820-0954. There are five subspecies of the Rev. A, but none of them allows more than one drive on each ATA bus. Loose Rev. B ROMs seem to be scarce, but Rev. B or Rev. C (the latter being far commoner) will allow two drives (master/slave) on a bus. Rev. B does not conflict with the Sonnet Tempo Trio PCI card, which gives you USB, FireWire and ATA-133 on a single card, but that is a very small difficulty if the Trio is not in your plans. That being the case, a Rev. C ROM will suit you, and be more easily obtained.

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