Bob Orrfelt has done wonders in his resurrection of the 2068 cartridge. While the programs on the two sample cartridges that I have tried are very simple they do demonstrate the use of the cartridge to store and use programs. Bob will soon, to my understanding, have an EPROM programmer available that will allow the user to load a Basic program into their computer and thus program the EPROM. Loading of a program is as simple as inserting the cartridge into the cartridge port, turning on the computer, turning on the cartridge by throwing a switch, and pressing NEW and ENTER. The program is instantly loaded and running.
The switch on the cartridge is very handy if you wish to transfer the EPROM program into RAM and view it. To do this insert the cartridge making sure that it is switched in the off position. Turn on the computer and type in the following programs (you can not enter any program lines with the EPROM is on or the EPROM has been RUN and stopped).
Source Code
1 FOR n=32768 to 40959
3 OUT 244,16: LET x=PEEK n
5 OUT 244,0: POKE (n+16384),x
7 NEXT n
8 STOP
10 FOR n=49161 TO 57343
20 LET x=PEEK n
25 IF n=49161 THEN PRINT x;: LET n=n+2: GO TO 40
30 IF x=13 THEN PRNIT : LET n=n+2: PRINT PEEK n;: LET n=n+2
34 IF x=14 THEN LET n=n+5
38 IF x<>13 AND x<>14 AND x>5 AND x<>239 AND x<>20 THEN PRINT CHR$ x;
40 NEXT N