[ DOCS ] : OpenCBM Manual
Replicated, corrected and reformatted from https://opencbm.trikaliotis.net/ on 7/16/2025
Category: archives
[ DOCS ] : Memo Star Kernal Command Reference
Courtesy of Zippy Zap @ Lemon64 forums: Has built-in function keys, uses wedge style commands with @ and >. so >$ is directory (or @$) > or @ reads the error channel. Does not have a fast loader. Command Action @ or > Read error channel >$ or @$ Load disk directory LOAD”PRGNAME” (with or without ,8 or ,9) Load file from disk @8...
Commodore 64 Kernalpalooza
Today, we can change and swap the kernal about and try out new things a lot faster and easier than it used to be.
We’ll go over the different levels of things that can be done, from experimenting with simple kernal code changes to options for swapping out the installed and in-use version!
ROM updates & working with EPROMs
[Archived from Peter Schepers’ site]
The ROM’s in the C64 and the original 1541 models are 24 pin and are not directly pin compatible with burnable 2732 or 2764 EPROMS. In order to upgrade to a newer ROM revision or change the ROM to something else and use either a 2732 (for the character set) or 2764 (for kernal/DOS) EPROM, a socket adapter must be built. See here for detailed instructions on how to build one.
Making Commodore 64 ROM Socket Adapters
Socket adapters are required on the original C64 and 1541 models when replacing the existing 24-pin ROM with a 28-pin EPROM, like a 2764 or larger. They are also needed if you want to replace a 2764 with a larger 27128, a 27128 with a 27256 or a 27256 with a 27512. All of these adapters are covered here.
Microtext 2.6
This is a cool programming “framework” that was adapted for the C64, and was intended to allow programmers and users to easily create and use programs across multiple platforms freely.
[ DOCS ] : Turbo ROM MkIII Reference
f1: LIST: + CHR$(13)f2: OLD + CHR$(13)f3: RUN: + CHR$(13)f4: Toggles something? ON/OFF (maybe fastload?)f5: LOAD + CHR$(13)f6: SAVE”f7: @$* + CHR$(13)f8: LOAD + CHR$(13) I also found a couple more: CTRL + f1: @N* + CHR$(13)CTRL + f7: Disable Function Keys Now before you go pressing CTRL + F1 be warned, THIS WILL FORMAT THE DISK IN DRIVE 8, and give it a label...
[ DOCS ] : JiffyDOS Command Reference
Command Action @ Read the disk drive error channel @C:newfile=file Copy a file on the same diskette @I Initalize the disk drive @N:diskname,ID Format a NEW diskette @N:diskname Short NEW @Q Disable the JiffyDOS commands @R:[newname]=[oldname] Rename A File @S:[file1],[file2]… Scratch a file (files) @UJ Reset the disk drive @V Validate a disk @$ Display a disk directory @#device Set the default device number...
[ DOCS ] : PiffyDOS Kernal Documentation
PiffyDOS – Programmers JiffyDOS JiffyDOS from CMD has almost become a de-facto standard for the Commodore world. It’s compatibility, speed and features makes it the natural choice for users today. I found it very interesting how CMD managed to squeeze everything into that 8kb of ROM and started to disassemble the code. With the Omicron re-assembler I got about 100k of text that i...