4551c88a50
BSAVE/BLOAD: save and load virtual memory blocks with 0xFD-header binary format, operating on the current DEF SEG segment. TUI color: tui_refresh emits ANSI SGR codes from cell attributes; COLOR statement sets tui.current_attr when TUI is active. Extended PEEK/POKE: CGA graphics framebuffer (interlaced layout) via gfx_cga_peek/poke routed through virmem when gfx_active(); BIOS keyboard shift flags (offset 0x17 bit 7 = insert mode). Add bibliography to language reference. 64 tests, all passing.
1.6 KiB
1.6 KiB
GW-BASIC 2026
A portable C reimplementation of Microsoft GW-BASIC, using the original 8088 assembly source (released by Microsoft in 2020) as the authoritative reference.
This is not a transpilation — it reimplements the algorithms in clean C11
with modern data structures while targeting bug-compatible behavior.
Unlike the original assembly (43,771 lines across 43 .ASM files), this
version is structured as modular C suitable for new feature development.
Highlights
- Authentic full-screen editor — dynamically sized screen buffer (25×80
default, full terminal with
--full), free cursor movement, Enter-on-any-line, F1-F10 function keys, Insert/Overwrite toggle - Binary and ASCII file formats —
SAVEwrites tokenized binary by default,LOADauto-detects format (just like the real thing) - INKEY$ extended keys — arrow keys, F-keys, and navigation keys return proper
CHR$(0)+ scan code two-byte sequences - Sixel graphics —
SCREEN 1/SCREEN 2rendering in compatible terminals - Sound —
SOUND,BEEP,PLAY(MML) via PulseAudio - Full file I/O — sequential, random-access, SAVE/LOAD/MERGE/CHAIN/COMMON
- Printer output —
LPRINT/LLISTto file or real hardware via--lpt - Classic programs — Hamurabi, Lunar Lander, Gunner, and Diamond from David Ahl's BASIC Computer Games (1978) run out of the box
- 64 test programs with golden-file regression testing and DOSBox-X compatibility testing against real GWBASIC.EXE
- MIT License
:maxdepth: 2
getting-started
language-reference
architecture
development
roadmap