6800 Details

[herby1620]

I see that the KC cassette version of the 680 basic code is "out there". Has anyone posted a version of the S1/S9 code as a text file?? Does Microsoft know about this? Do they care?? I don't see anywhere where links are shown.

I'd be very interested in this. I've (somewhere) got one of the cassettes (long ago, it is buried now, I suspect) and want to adapt it to a different ACIA based monitor. As I remember it, the "instruction manual" was a small sheet of paper (less than letter size) printed on both sides.

I never built a KC tape box. I had an ASR33 teletype and then a floppy disk (all 100k of it!).

The other basic (Uiterwyk's) that is BCD based (more accurate, slower) I long ago typed in the source. Interesting how you find out about how basic works inside. The Microsoft (Altair 680) one used tokens, the Uiterwyk one always re-scanned the text (slower).

[Grant Stockly]

I made that text file that is floating around. Recovered it off of the tape myself.

Basic uses the ACIA ROM to do serial I/O. It also uses the KCACR ROM for tape I/O. You should be able to just write your own ROMs or change the call locations for those ROM calls.

Download the attached files for the two versions of KCACR basic. These files are ready to be transmitted as is to the ACIA monitor ROM in the 680.