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62892: Guide a character up or down staircases
The address of this interruptible subcommand routine is placed into bytes 14 and 15 of a character's buffer by the routine at 62976. It guides the character down to the first floor of a building (so that he can then leave it on the way to his final destination), or up to the floor he is heading for.
H Character number (215-229)
62892 LD L,0 Point HL at byte 0 of the character's buffer
62894 BIT 0,(HL) Is the character midstride?
62896 JP NZ,60506 If so, move the character from the midstride position and update the SRB
62899 LD L,3 Has this character's command list been marked for a restart?
62901 BIT 4,(HL)
62903 JP NZ,62084 Terminate this subcommand if so (this jump is never made because bit 4 of byte 3 is unused)
62906 DEC L L=2
62907 LD A,(HL) A=character's y-coordinate
62908 LD L,16 Compare it with the y-coordinate of the character's intermediate or final destination
62910 CP (HL)
62911 JP Z,62084 Terminate this subcommand if they match
62914 PUSH AF Save the carry flag
62915 CALL 62597 Make the character consider flipping a light switch
62918 POP AF Restore the carry flag
62919 JP C,60320 Make the character move down if he's above the level of his destination
62922 JP 60315 Otherwise make the character move up
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