Routines
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09506: THE 'SCANNING TWO CO-ORDINATES' SUBROUTINE
This subroutine is called by S_SCREEN, S_ATTR and S_POINT to make sure the required two co-ordinates are given in their proper form.
Output
F Zero flag set if checking syntax
S_2_COORD 09506 RST 32 Fetch the next character.
09507 CP "(" Is it a '('?
09509 JR NZ,S_RPORT_C Report the error if it is not.
09511 CALL NEXT_2NUM Co-ordinates to calculator stack.
09514 RST 24 Fetch the current character.
09515 CP ")" Is it a ')'?
S_RPORT_C 09517 JP NZ,REPORT_C Report the error if it is not.
This routine continues into SYNTAX_Z.
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