I have released an update to the firmware for the Altair 8800c front panel interface board. Firmware version 1.1 is available here:
https://deramp.com/downloads/altair/har ... air_8800c/
In version 1.1, the inject code for the two Intel hex file loaders has been updated to stay and execute at the address specified on the front panel switches instead of relocating itself to high memory when executed. With the previous version, you could not load a hex file into high memory even if you specified that that loader be placed in low memory.
Mike