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Routines |
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This subroutine leads to a following numeric expression being evaluated but zero being used instead if there is no expression.
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| FETCH_NUM | 1CDE | CP $0D | Jump forward if at the end of a line. | |||||||
| 1CE0 | JR Z,USE_ZERO | |||||||||
| 1CE2 | CP ":" | But jump to CLASS_06 unless at the end of a statement. | ||||||||
| 1CE4 | JR NZ,CLASS_06 | |||||||||
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This entry point is used by the routines at SAVE_ETC and LIST.
The calculator is now used to add the value zero to the calculator stack.
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| USE_ZERO | 1CE6 | CALL SYNTAX_Z | Do not perform the operation if syntax is being checked. | |||||||
| 1CE9 | RET Z | |||||||||
| 1CEA | RST $28 | Use the calculator. | ||||||||
| 1CEB | DEFB $A0 | stk_zero | ||||||||
| 1CEC | DEFB $38 | end_calc | ||||||||
| 1CED | RET | Return with zero added to the stack. | ||||||||
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