Hello I’m looking to borrow or buy cheaply any M100 option rom to verify my M100 works with option rooms.
I’m trying to get a new REXCPM working on my M100, and running into an issue where the software will not run after initializing and loading the REXCPM software onto it. Basically the initialization program seems to complete without errors, initializing the directory and transferring the RXC_11_b39 firmware from a disk emulator, but then when I enter “CALL 63012” the M100 sort of hangs and various areas of the screen get all black pixels, like the block character is sent for a few repeats on random parts of the screen, but it never results in a working Rex. Resetting goes back to the basic menu but no rexmgr shows up. I’ve worked with Stephen Adolph a bit on this, he’s sent me a test program to test all the memory on the REXCPM which seems to succeed, so I next want to verify that the M100 option rom circuitry is working under normal conditions. I don’t need any specific rom, and I don’t even need to keep it very long if you want it back. Alternately, I have several microcontrollers and even an old pic-kit programmer so maybe I could burn a conventional option rom image to a physical EEPROM (I guess a 27C256?) Thanks, Steve
