island-ctory/src/helpers.asm

SECTION "LCD controller status interrupt", ROM0[$0048]
    ;; HACK!!!!!!!!!!!!!
    ;; there's some sort of bug in the emulator which needs to be fixed,
    ;; which screws up the program counter immediately after it exits a halt.
    ;; this nop protects against that for now.
    nop
    jp isr_wrapper

SECTION "vblank", ROM0[$40]

handle_vblank:
    reti

SECTION "interrupt routines", ROM0

_interrupts_disable::
    di
    ret

_interrupts_enable::
    ei
    ret

SECTION "hUGE ISR", ROM0

isr_wrapper:
    ld a, [_game_state]
    cp 0
    jr nz, .done
    push af
    push hl
    push bc
    push de
    call hUGE_dosound
    pop de
    pop bc
    pop hl
    pop af
.done:
    reti