This is based on an early version of Brian White's ROM Flash card he designed for the Tandy WP-2 Word processor.
There were never any ROM cards released by Tandy for this system so it is only as useful as the homebrew being coded for it.
The brains in the WP-2 prevent the WR signal being sent to the ROM card so these had to previously be flashed externally with additional hardware. I've re-routed the WE signal to Card edge pin 15 (Not normally used). With the accompanying mod in the WP-2 (Run a wire from CPU /WE to pin15) you can now reflash the cart in system over a null modem cable, or just use it as a read only card.
I've ported Microsoft Basic to the Tandy WP-2 and this cart will come flashed with a copy of it. Open source tools to update the cart and some other handy apps are available on the Model T Computers Facebook group or drop by our Discord and I can send them to you.
There is also a Forth compiler, and a port of Zork available for the Tandy WP-2 if you go searching for it on google.
I cant imagine there will be much interest in such an obscure vintage machine, as such I only built 4 of these so once they are gone, they are gone!