Hi, I have an IMSAI 8080 with:
-MPU-A
-VDM1 output to CRT display
-GDM w/ Cuter monitor ROM
-PIO
I am having trouble getting the keyboard to communicate with the Cuter monitor. I can load the Cuter from C000 without issue, but the keys on the keyboard do nothing. It is plugged in to the top port of the input side of the PIO. Also, the cap lock light and other lights on the keyboard do not do anything. The keyboard is getting 5V. Pictures of the setup are below. I figure it could be a PIO settings/address issue, PIO malfunctioning, Cuter settings issue, keyboard could be malfunctioning. The GDM doc mentions something about using the sense switches to set options before starting the Cuter ROM but doesn't give any details further.
Any ideas or thoughts? I have a logic probe and scope.
-MPU-A
-VDM1 output to CRT display
-GDM w/ Cuter monitor ROM
-PIO
I am having trouble getting the keyboard to communicate with the Cuter monitor. I can load the Cuter from C000 without issue, but the keys on the keyboard do nothing. It is plugged in to the top port of the input side of the PIO. Also, the cap lock light and other lights on the keyboard do not do anything. The keyboard is getting 5V. Pictures of the setup are below. I figure it could be a PIO settings/address issue, PIO malfunctioning, Cuter settings issue, keyboard could be malfunctioning. The GDM doc mentions something about using the sense switches to set options before starting the Cuter ROM but doesn't give any details further.
Any ideas or thoughts? I have a logic probe and scope.