| Routines

F499: 'J' pressed - jump

The address of this routine is found in the table of keypress handling routines at 6880. It is called from the main loop at 6767 when 'J' or 'L' is pressed.
F499 | CALL $6648 | Is ERIC on a staircase?
F49C | RET NZ | Return if so (ERIC can't jump while on a staircase)
F49D | LD BC,$0C04 | B=0x0C (ERIC with arm raised), C=0x04 (bit 2 set)
F4A0 | LD A,$10 | This will initialise the jumping action timer at 7FF6 to 0x10
F4A2 | JR $F478 | Start the jump