island-story/src/game.s

INCLUDE "hardware.inc"

SECTION "Game Loop", ROM0

Game_Start::
    ; disable ldc (CAN ONLY BE DONE DURING VBLANK) & interrupts
    halt
    di
    ld hl, rLCDC
    res 7, [hl]

    ld hl, intro_Data
    call Map_Load

    call Player_Init

    call Font_Init

    ; re-enable ldc & interrupts
    ld hl, rLCDC
    set 7, [hl]
    ei

.loop:
    ld hl, frame
    inc [hl]

    call Keys_Update
    call Player_Update

    ; wait for vblank
    halt

    call Map_Update

    ; ~160 cycles
    ld a, HIGH(_OAM)
    call DMA_Start

    jr .loop