| Volex TTX2000 S Issue 1.2 | Routines |
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| MASK_INT | 0038 | PUSH AF | If interrupt reset flag is 0, jump to START to reset. This catches the situation where the BASIC ROM has cleared the printer buffer and this ROM gets paged in directly. | |
| 0039 | LD A,(interrupt_reset_flag) | |||
| 003C | AND A | |||
| 003D | JR Z,START | |||
| 003F | POP AF | Else return from interrupt service routine. | ||
| 0040 | RETI | |||
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