My P10 has a single 4Kx8 EPROM that operates off 5v only and my schematic show three 2708 EPROMs 1Kx8 that run +12,+5, and -5. Does anyone know the firmware for it. Better yet does anyone have a copy they would share. My processor will not send -IOREQ to enable 4556 decoder. I can ground the pin and sequencer panel comes alive but none of the switches function, they just light up and I hear the tape deck. I'm hoping it is EPROM related. I know the processor is good. Any help appreciated.
Message
P10 Sequencer
2008-06-23 by fsimon100