Basics - BASIC Interpreter for old computers

The project is currently primarily focused on APPLE II computers, with an architecture that allows for expansion to other retro computers.

Project Objectives

• BASIC Interpreter for old computers

Planned Developments

• Support for retro computers:
  • Commodore 64
  • Amstrad
  • MSX flavors
  • Others...

Technical Stack

• Go 1.25+

Version control system

• Jujutsu (jj) + Git

Supported computers

APPLE II

Supported instructions set

• REM
• PRINT
• LET
• FOR ... TO ... STEP ... NEXT
• IF ... THEN ... ELSE ...
• GOTO
• GOSUB ... RETURN
• HTAB
• VTAB
• END

Supported operators

• =
• <>
• <
• >
• <=
• >=
• +
• -
• *
• /
• ^

Extended instructions set

• GOTO support use of identifier and complex expressions. You can write:

10 A=10
20 GOTO (A*3)+10
30 PRINT "Hello"
40 END

• GOSUB support use of identifier and complex expressions. You can write:

10 PRINT "Hello ":A=50:GOSUB A*2:PRINT "!!!"
30 END
100 PRINT "World":RETURN

• HTAB and VTAB support user of identifier and complex expressions. You can write:

10 FOR A = 1 TO 15
20 HTAB A * 2: VTAB A: PRINT A
30 NEXT A
40 B = 0
50 FOR A = 15 TO 0 STEP -3
60 HTAB A * 2
70 VTAB A/3+12+B
80 PRINT A
90 B = B + 2
100 NEXT A
110 FOR A = 1 TO 15
120 HTAB A * 2: VTAB 24: PRINT A
130 NEXT A

License

This project is licensed under the MIT License - see the LICENSE file for details.

Project Status

✅ In active development — architecture being finalized.

Contribution

Contributions are welcome:

• Fork
• Branch
• Commit with clear messages
• Pull Request

Author

Project developed by ultra-sonic-28