I just found out information regarding which motherboard the "AMI386 clone". The machine uses the DataExpert OPTI-495SX (471WB) motherboard.
Looking at the datasheet for the DataExpert OPTI-495SX located here: https://stason.org/TULARC/pc/motherboar ... 495SX.html
The machine not only supports the 80386(DX) motherboard, but the 80486SX, 80486 and 80486DX2 processors.
The motherboard which relies on the OPTI-495SX chipset can only support up to 32 MB ((4) 4M x 9 SIMM on Bank 0 and (4) 4M x 9 SIMM on Bank 1). The current release of PCem supports up to 256 MB in which neither the emulated machine nor the AMIBIOS can handle.
Here is a screenshot of these embarrassing bugs that I found:
If I can do this myself, I can try to pull out a fix myself.
Discussion of development and patch submission.
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