Steve, I think I will make a tool to examine the checksums of REXCPM memory blocks to see if your software is loading correctly, ok? I'll send it along in a day or so. Steve
On Wed, Oct 21, 2020 at 11:55 AM Steve Glenner <[email protected]> wrote: > 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 > >
