.globl _ubox_get_tile RDVRM = 0x004a _ubox_get_tile:: ld hl, #2 add hl, sp ld b, #0 ld c, (hl) inc hl ld l, (hl) ld h, #0 add hl, hl add hl, hl add hl, hl add hl, hl add hl, hl add hl, bc ld bc, #0x1800 add hl, bc call RDVRM ld l, a ret