PLANET WATCHER
The archive
 
Everything that survives, as it was.
........................................
 
1 Original disc image, 1983
untouched, years read as 19xx
 
2 The 2026 disc
one change: the century
 
3 The astronomy manual (PDF)
 
4 AST2 source: the main program
463 lines of BBC BASIC. Line 238
is the famous one.
 
5 AST1 source: the title screen
the comet, drawn in 46 lines
 
........................................
B Back to the program
T Tonight's sky
 
Discs run in any BBC Micro emulator.
Boot with SHIFT+BREAK (Shift+F12).