Gregory's Serverso i can confirm this by disabling the output driver (pin 12 of U37) for ARB1, which will allow it to remain high, so U26 will drive a 2 on the bus instead of a 0.
a little soldering work and a small piece of kapton tape, and i think we are ready.
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 @tubetime always felt weird that even on IBM hardware that supports it, that OS/2 cant do an ACPI soft shutdown. Even OS/2 4.52  @tubetime Half a warped OS... The whole IBM fumbling the Star Trek thing with OS/2 and the Warp name silliness was pretty amusing. |
and the logic analyzer confirms that, with this mod, we're seeing a 2 on the bus even though U26 is bugging and trying to drive a 0.