- VM now prompts for filename to load bytecode from
- Added new EightBall disassembler (`disass`), removed disassembly printout from compiler
- Fixes to interpreter / compiler error reporting. Should no longer report completely incorrect line numbers!
- Added new immediate mode VM instructions for load (`LDAWI`, `LDABI`, `LDRWI`, `LDRBI`), store (`STAWI`, `STABI`, `STRWI`, `STRBI`), and flow control (`JSRI`, `JMPI`, `BRCI`). Modified compiler to use these new instructions. This significantly improves code density and VM execution speed.
- Compiler: do not emit LDI 0, DISC sequence, which is a no-op.
- VM: add GPL info and progress when loading bytecode
- Most importantly: a version of Tetris coded in EightBall!
- Fixed indentation of VM code. Turned on stack checks for GCC only.
- Added new `VM_DISCARD` VM instruction (and compiler support). This makes the VM significantly more efficient.
- Configured Linux VM to be compatible with Apple II environment.
- Added line to force to interpret mode to prevent surprises.
- Compiler: fixed bug when exiting `for` loop using `return`. The compiler was leaking a word on the evalutation stack after jumping out of the body of the `for` loop.
- New keyword `const`
- `const` values are supported as array dimensions and variable.array initializers
- Refactored code and saved several 100 bytes
- Compiler generates better VM code for array allocation
- The compiler was not pushing the SENTINEL value to the operator stack and popping it afterwards, so the expression parsing was getting messed up. Now fixed.
- Also added targets to the Makefile to allow the emulators to be run directly (make xvic, make x64, make mame).
End of line on CBM is 13, not 10.
Converted sieve4.8b and unittest,8b to PETSCII and added them to test.d64
Unit tests run on C64 with only one failure (same failure as when running under Linux VM).
This fixes a memory corruption bug that occurred when compiling code with subroutines. The symbol table was corrupting the source code. This was showing up on 6502 systems only (seemed okay on Linux).
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Bobbi Webber-Manners