CBM prg Studio Version 2.7.0 is released. There are a lot of new features in this version. I’d really appreciate it if you report any bugs you find or have any suggestions/comments.

CBM prg Studio allows you to type a BASIC or Machine Code program in using a nice Windows environment and convert it to a ‘.prg’ file which you can run on an emulator, or even a real C64 / VIC20 or PET if you’re feeling brave and have the right kit.

CBM prg Studio is the result of merging C64PrgGen and VIC20PrgGen. Adding new features and fixing bugs in two apps which were 95% similar was a bit of a nightmare so merging them made sense.

It was also a good opportunity for a face lift and to add some new features, such as:

• Programs are project based, meaning all related source files, sprite files etc. are kept in one place and multiple source files can be linked more easily.
• Tabbed MDI.
• Syntax highlighting.

What CBM prg Studio isn’t is a front-end for tok64, cbmcnvrt, bastext or any other tokeniser / detokeniser / assembler. It’s all been written completely from scratch.

New features:

• Debugger:
  • Keyboard shortcuts.
  • Instruction cycle counter.
  • Overlay files.
  • VICE Snapshot files (for C64 and VIC 20 only).
  • Better execution control, e.g. step over, into etc.
  • Change SP and SR registers.
  • Memory viewer.
  • Much better performance.
  • Updated tutorial.

• Character editor:
  • Edited characters indicator.
  • Copy groups of characters.
  • Scroll the scratchpad.

• BASIC:
  • Batch mode added.
  • Constants can be defined/redefined in code, and use hex values.
  • Auto line numbering inproved.

Bugs fixed:

• ‘£’ was in invalid BASIC character.
• $(nn),y was not being assembled properly, whereas ($nn),y was.
• Casted offsets (offsets which are based on other offsets) were broken.
• Problems renumbering BASIC programs with ON..GOTO/GOSUB with spaces in the line number list.
• PC relative offsets (e.g. bvc *-2) fixed.
• ‘Align’ directive not working.
• Load/save in character editor.
• Multicolour issues with the screen/character/sprite editors.
• Including sprite files (IncBin) into assembly source only generated 63 bytes.

See the help for a complete list of new features and fixed bugs.

Download: CBM prg Studio v2.7.0 (881)

source: ajordison.co.uk