I've just realised that since my XT has no second serial port, the IRQ3 still remains unused, so maybe something in XTMax may find a good use for it. Since the second USB port on the Teensy supports OTG, maybe it could be used for connecting an USB mouse and emulate it as if it has been connected to COM2:? At first I was thinking about PS/2 emulation, but it turns out, the PS/2 data port 0x60 is already being used in the XT computers, so there would be a resource conflict.
I've just realised that since my XT has no second serial port, the IRQ3 still remains unused, so maybe something in XTMax may find a good use for it. Since the second USB port on the Teensy supports OTG, maybe it could be used for connecting an USB mouse and emulate it as if it has been connected to COM2:? At first I was thinking about PS/2 emulation, but it turns out, the PS/2 data port 0x60 is already being used in the XT computers, so there would be a resource conflict.