evv/gw-basic-2026

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Eremey Valetov ad21350003 Add full-screen TUI editor, DOSBox-X compat testing, rename to GW-BASIC 2026

Authentic GW-BASIC screen editor with 25x80 buffer, free cursor movement,
enter-on-any-line, F1-F10 function keys, Insert/Overwrite toggle, KEY
ON/OFF/LIST statement, and Ctrl+Break handling. HAL pointer swap routes
all PRINT/LIST/error output through the TUI automatically. Piped mode
unchanged (50/50 tests pass).

Adds automated compatibility testing infrastructure: DOSBox-X headless
config, PRINT-to-file transform script, and run_compat.sh with --generate
and --compare modes for verifying output against real GWBASIC.EXE.

Project renamed from gwbasic-c to GW-BASIC 2026.

2026-02-22 12:18:17 -05:00

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Getting Started

Dependencies

C11 compiler (GCC or Clang)
CMake 3.10+
PulseAudio development library (libpulse-simple) — optional, for SOUND/BEEP/PLAY

On Debian/Ubuntu:

sudo apt-get install build-essential cmake libpulse-dev

On Fedora/RHEL:

sudo dnf install gcc cmake pulseaudio-libs-devel

Building

git clone https://github.com/evvaletov/gw-basic-2026.git
cd gw-basic-2026
mkdir -p build && cd build
cmake .. && make

The binary is build/gwbasic.

Usage

Interactive Mode

Running ./gwbasic with no arguments launches the full-screen editor:

$ ./gwbasic
GW-BASIC 2026 0.5.0
(C) Eremey Valetov 2026. MIT License.
Based on Microsoft GW-BASIC assembly source.
Ok
PRINT 2+2
 4
Ok
FOR I=1 TO 5:PRINT I;:NEXT
 1  2  3  4  5
Ok

Use arrow keys to move the cursor freely. Press Enter on any screen line to re-enter it. F1-F10 insert common commands (F2 runs the program).

Running a Program File

./gwbasic tests/programs/prime_sieve.bas

Piped Input

echo '10 FOR I=1 TO 10:PRINT I*I;:NEXT' | ./gwbasic

Direct Mode Expressions

Type expressions and statements at the Ok prompt:

PRINT SIN(3.14159/2)
 1
A$="HELLO WORLD":MID$(A$,7,5)="BASIC":PRINT A$
HELLO BASIC

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