With the BASIC cartridge put into your 400/800 or BASIC switched on, type (e.g. after the READY prompt)
PEEK(43234)
and then press RETURN.
The computer will give you an result.
| Result | Revision of BASIC | Comment |
|---|---|---|
| 162 | Revision A | was sold as cartridge for ATARI 400 and 800 |
| 96 | Revision B | built into XL models (1200XL,600XL,800XL) |
| 234 | Revision C | built into XE models (65XE,130XE,800XE) |