BASIC IV ROM Routines
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Submitted by Steve Fewell
Routine: NextCharPTRB
Name: Next Char PTRB
Starting Address: &8ED5
Exit: Move past spaces in BASIC's Text
Pointer B and return the next Character in the string.
Description:
Reads past any space characters found at the current position in the PTRB.
Returns with the next non-space Character from PTRB in A, and with the PTRB
Offset pointing to this value.
Disassembly for the Next Char PTRB routine
8ED5 | 164 027 | A4 1B | LDY &1B | |
8ED7 | 230 027 | E6 1B | INC &1B | |
8ED9 | 177 025 | B1 19 | LDA (&19),Y | |
8EDB | 201 032 | C9 20 | CMP#&20 | |
8EDD | 240 246 | F0 F6 | BEQ -10 --> &8ED5 | |
8EDF | ` | 096 | 60 | RTS |