* MDA and CGA/Tandy now work at the same time. It is possible to switch from one to the other from the OSD menu, as well as their monochrome simulation independently.
* Fixed problem with INT0 test failing
* Fixed a bug that caused the timer counter to be cleared on latch.
* PCXT DIP switches and access to MDA memory
* Add port_b[6] to lock PS/2 CLK.
* PS/2 CLK to drop LOW after receiving the key code.