“Geoff Graham released an inexpensive video terminal design in 2014. Several others have updated the firmware.
Here is an updated PC board. Geoff Graham released an inexpensive video terminal design in 2014. Unfortunately the original design only had TTL serial output and it was necessary to add external drivers for RS232 levels. Several others have updated the firmware including allowing use of a USB keyboard. Here is an updated PC board that incorporates several changes: RS232 driver is included (Max232CPE or equivalent) Color selection is now thru jumpers. USB connector changed to a USB “A” connector so a keyboard can be directly connected Barrel Jack input for 5v added Silk screening improved to show jumper settings. The original firmware will support a PS/2 keyboard input David Hansel’s modified firmware will support a USB keyboard.”