Hi, I have a SWTPC 6800 computer that I have updated (decades ago) with a Percom SBC/9 CPU board. The board contains a 6809 processor. The board also contains two 2716 EPROMS labelled HUMBUG F000 and HUMBUG F800. Ideally I would like to get the source code for the monitor. If that's not possible a user manual for HUMBUG 6809 might suffice. I need to know the commands HUMBUG implements and the entry points for the standard functions such inputting and outputting characters through the serial port. I have found HUMBUG manuals for the 68K and something that is supposedly for the 6809 but most of the commands in that manual aren't implemented in the version of HUMBUG I have. Thanks for any help anyone is able to provide.