| Location | Description |
|---|---|
| $68 | LOMEM (LOW BYTE is always 00) |
| $4E-$4F | Random Number field |
| $73-$74 | HIMEM: $73=LO BYTE |
| $75-$76 | Line number being executed |
| $AF-$B0 | End of Applesoft program |
| $D8 | ONERR flag (POKE 216,0 cancels ONERR) |
| $DE | ONERR error code in decimal (PEEK(222)) |
| $E0-$E1 | X-coordinate (0-279) in HEX |
| $E2 | Y-coordinate (0-191) in HEX |
| $E4 | Color being used (0-7) |
| $E6 | Current HI-RES page |
| $FBB3 | Apple II Type Identifier |