I tried with an 8 bit short oti 037c isa card and it didn't work, the only card that worked was an isa XT-IDE card, but for a video card I think it won't work unless you need a toshiba owner card
I dug out my Toshiba T3100e and both the ATI small wonders v2 card (cga) and an Octek VC-001 card (cga/ega). you need to setup the bios of the T3100e to use the "external" card. and setup up the jumpers on the card if needed.
For my ATI card, i had to set option 6 to "External CGA (80*25) (40*25 works aswell but is low res).
This card has both 9 pin TTL and composite out, so the jumpers on the card are set for colour output and colour output over TTL/Composite.
Planet X3 in CGA 16 colour composite mode on the living room TV.
For the Octek EGA card, set option 6 to External other (internal CGA disable). This gave me the best results. I use an MCA2VGA to connect the TTL card to a VGA monitor.
If i set the card up for CGA via jumpers, Planet X3 in 4 colour TTL CGA:
If i set the jumpers on the card for EGA, Simcity in EGA mode:
I wish i had an 8 bit VGA card to test with the machine but i don't have one.
Hope this helps
quick edit: i have also used an Adlib clone card in the T3100e, so that should work aswell.