This is modified source code based on BBC BASIC (Z80) by R.T. Russell, who kindly agreed to release the original sources under the zlib license at the request of David Given. David published the sources as part of his cpmish project.

The original sources released by R.T. Russell are in the initial commit. I have made the following modifications:

• Modified sources to assemble with z88dk's z80asm
• Fixed a bug that causes the RUN command to hang under emulators.
• Moved hardware-specific functions from patch.asm to hardware.asm.
• Implemented CLS, TAB, and COLOUR using ANSI escape codes
• Added a Makefile and this README

Planned modifications:

• Graphics support for the TMS9918A video chip for use with my video card for the RC2014.
• Sound support for my SN76489 sound card and/or Ed Brindley's YM2149 sound card
• Joystick support for my Game Controller board supporting ColecoVision, Sega, and Atari controllers.
• Back port additional functionality from modern BBC BASIC.

Download and install z88dk (compile if necessary). Make sure z88dk's bin directory containing z80asm is in your path.

Run make to build bbcbasic.com.

If make is not available, run:

z80asm -obbcbasic.com -b -d -l -m main.asm exec.asm eval.asm fpp.asm hardware.asm cpm.asm ram.asm