Routines |
Prev: 07427 | Up: Map | Next: 07595 |
This subroutine is used to find occurrences of either DATA, DEF FN or NEXT.
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LOOK_PROG | 07558 | LD A,(HL) | Fetch the present character. | |||||||||||
07559 | CP ":" | Jump forward if it is a ':', which will indicate there are more statements in the present line. | ||||||||||||
07561 | JR Z,LOOK_P_2 | |||||||||||||
Now a loop is entered to examine each further line in the program.
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LOOK_P_1 | 07563 | INC HL | Fetch the high byte of the line number and return with carry set if there are no further lines in the program. | |||||||||||
07564 | LD A,(HL) | |||||||||||||
07565 | AND 192 | |||||||||||||
07567 | SCF | |||||||||||||
07568 | RET NZ | |||||||||||||
07569 | LD B,(HL) | The line number is fetched and passed to NEWPPC. | ||||||||||||
07570 | INC HL | |||||||||||||
07571 | LD C,(HL) | |||||||||||||
07572 | LD (23618),BC | |||||||||||||
07576 | INC HL | Then the length is collected. | ||||||||||||
07577 | LD C,(HL) | |||||||||||||
07578 | INC HL | |||||||||||||
07579 | LD B,(HL) | |||||||||||||
07580 | PUSH HL | The pointer is saved whilst the address of the end of the line is formed in the BC register pair. | ||||||||||||
07581 | ADD HL,BC | |||||||||||||
07582 | LD B,H | |||||||||||||
07583 | LD C,L | |||||||||||||
07584 | POP HL | The pointer is restored. | ||||||||||||
07585 | LD D,0 | Set the statement counter to zero. | ||||||||||||
LOOK_P_2 | 07587 | PUSH BC | The end-of-line pointer is saved whilst the statements of the line are examined. | |||||||||||
07588 | CALL EACH_STMT | |||||||||||||
07591 | POP BC | |||||||||||||
07592 | RET NC | Make a return if there was an 'occurrence'; otherwise consider the next line. | ||||||||||||
07593 | JR LOOK_P_1 |
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