| Routines

7CD0: Make a character walk up and down until a certain time

Used by command lists 0x00, 0x02, 0x04, 0x06, 0x08, 0x0A, 0x0C, 0x0E, 0x10, 0x14, 0x1A, 0x20, 0x22, 0x24, 0x26, 0x28, 0x2E, 0x30, 0x32, 0x34, 0x48, 0x4A, 0x4C, 0x50, 0x52, 0x54, 0x56 and 0x58 to make a character walk up and down within 7 spaces to the left of a fixed location (the 'walkabout origin') until a specified time, e.g. the end of the lesson or when a teacher arrives at the doorway of the classroom.
Input
H | Character number (0xB7-0xD1)
7CD0 | CALL $627D | Get the next byte (the event identifier) from the command list
7CD3 | LD L,$06 | Place it in byte 0x06 of the character's buffer
7CD5 | LD (HL),A
7CD6 | CALL $7CAB | Has the specified time arrived, and is the character at the walkabout origin?
7CD9 | JP NC,$638C | Move to the next command in the command list if so
7CDC | CALL $639F | Otherwise send the character off to another walkabout destination via the routine at 63ED, and return to the instruction at 7CDF (below) when done
7CDF | JR $7CD6 |