Oh... 25MHz base clock. Not a 33MHz.
Louis Ohland wrote:
92F1428 DMA chip and a different BIOS? Must strum my Vulcan Harp...
The Japanese "KIT-W2B" has the "bad" 92F1428 DMA chip, yet it works fine
with the following CPUs:
https://www.ardent-tool.com/PS55/complex/#60-W1x_W2x
DX4ODP-75 with 486SX-25 in the 1st socket.
DX2-66 alone in the 2nd socket (50 MHz internal clock) (huh?)
DX4-100 on an interposer with VRM, alone in the 2nd socket.
AMD 5x86 or Cyrix 5x86 (with voltage interposer) in the 2nd socket.
There is no significant difference between the Type 2 "H" and the PS/55 -W1/W2 complexes. Just the board P/N (or FRU?) and BIOS P/N are different.
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