What I have tested so far:
1. Tseng ISA 1MB ET4000ax
2. Tseng ISA 1MB ET4000W32p
3. Spea Vega V7 ISA 1MB (CL GD5428)
4. Diamond Speedstar 24x ISA 1MB (WD90C31)
Both Tseng Cards make trouble with my MT-32 in this System (Freeze).
The Spea VegaV7 has no Win30 Drivers and the Win 3.1 Drivers need a 386.
The Diamond Speedstar 24x has Win30 and Win31 Drivers. The Win30 Driver works, the Win31 Driver produces a Segment Fault in Dosextender (perhaps also requires a 386) and the TrueColor Mode 640x480 is not useful with any Dos-Picture-Viewer i tested. It only works in Win30.
Doc
Retro-Gamer 😀 ...on different machines