Changes
/* CHR$ () */
| 1 | &01 | SOH | 0-255 | PRINTS CHARACTER TO SCREEN |
| 2 | &02 | STX | NONE | TURNS TEXT CURSOR OFF |
| 3 | &03 | ETX | NONE | TURNS TEXT CURSOR ON IN IMMEDIATE || | | | | MODE |
| 4 | &04 | EOT | 0-2 | SET SCREEN MODE |
| 5 | &05 | ENQ | 0-255 | PRINT CHARACTER AT GRAPHICS CURS. |
| 17 | 145 (128+17) | File already exists. |
| 18 | 146 (128+18) | File does not exists. |
| 19 | 147 (128+19) | Direcotry Directory is full. |
| 20 | 148 (128+20) | Disc is full. |
| 21 | 149 (128+21) | Disc changed while file were open. |
