This is an adapter for connecting the 1541 (or other IEC floppy disk drives) to the Userport of a CBM8032 etc.

PET_CBM_1541_Adapter

This is an adapter for connecting the 1541 (or other IEC floppy disk drives) to the Userport of a CBM8032 etc. It is the reconstruction of a hardware, that fits to an old EPROM, that was found in a CBM8032. Most likely, it works with other BASIC 4.0 CBM/PET computers.

For communication with the disk drive, a special instruction set is required.

• each instruction starts with '!'
• there are a couple of floppy disk related instructions, that have an alternative representation in the EPROM
• a !q will deactivate/quite the software
• a [email protected] will display the status of the 1541
• a [email protected]"command" will send a command to the 1541
• No device number (,8) is required for any of the instructions
• The instructions are mostly standard BASIC4 instructions and can be short-cut as usually

!load"progname": loads a program from 1541
!save"progname": saves a program to 1541
!verify"progname": verifies a program
!catalog: displays the driectory of the floppy disk in the 1541
!open#SA,"file name": it requires a # and after that it is a secondary address*
!print#,"text": prints a texts, also a secondary address after #*
!get#: *
!close#SA: closes a file, also a secondary address after #*
!input#SA: *

!cmd: *

The items marked with * require some further investigation. See the test documentation.

The software resides in a 2532 EPROM in UD11 and is started with SYS40960.

Find more in the project documentation and my website