1f4c460f4f
Add GitHub Actions CI with automated build and test. Implement real terminal I/O with raw mode (enable_raw/disable_raw, proper INKEY$ polling via VMIN=0/VTIME=0, INPUT$ function). Add Sixel graphics engine with virtual framebuffer (SCREEN 1: 320x200, SCREEN 2: 640x200), Bresenham line drawing, midpoint circle, flood fill PAINT, DRAW mini-language parser, and Sixel encoder with RLE. Replace all graphics stubs with real implementations (PSET, LINE, CIRCLE, DRAW, PAINT, COLOR, SCREEN, POINT). Fix AND/OR/XOR operator precedence to be lower than relational operators. Add 13 classic test programs (39 total). Bump version to 0.5.0.
12 lines
273 B
QBasic
12 lines
273 B
QBasic
10 REM ON ERROR GOTO / RESUME test
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20 ON ERROR GOTO 100
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30 PRINT "Before error"
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40 ERROR 5
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50 PRINT "After resume"
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60 PRINT "Triggering div by zero"
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70 X = 1 / 0
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80 PRINT "After second resume"
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90 PRINT "Error handler OK" : END
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100 PRINT "Caught error"; ERR
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110 RESUME NEXT
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