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107 lines
1.3 KiB
107 lines
1.3 KiB
INCLUDE "hardware.inc"
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INCLUDE "util.inc"
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SECTION "Header", ROM0[$100]
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_entry:
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di
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jp start
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rept $150 - _entry
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db 0
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endr
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SECTION "Frame", WRAM0
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frame:: db
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SECTION "VBlank", ROM0[$40]
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handle_vblank:
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reti
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SECTION "Code", ROM0
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start:
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ld hl, rLCDC
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res 7, [hl]
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res 2, [hl]
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ld hl, rIE
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ld [hl], IEF_VBLANK
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call OAM_Init
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; call Keys_Init
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; call Player_Init
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ld hl, intro_Data
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call Map_Load
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; set palette
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ld a, %11100100
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ld hl, rOBP0
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ld [hl], a
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ld hl, rBGP
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ld [hl], a
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; enable lcd, sprites and interrupts
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ld hl, rLCDC
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set 7, [hl]
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set 1, [hl]
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ei
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.loop:
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ld hl, frame
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inc [hl]
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call Keys_Update
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call scroll_update
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; wait for vblank
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halt
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call Map_Update
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; ~160 cycles
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ld a, HIGH(_OAM)
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call DMA_Start
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jp .loop
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; TODO: Move into player movement routine
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scroll_update:
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; scroll map with arrow keys
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ld a, [keys]
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and PADF_UP
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jr z, .down
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ld d, 1
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call Map_ScrollUp
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ret
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.down:
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ld a, [keys]
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and PADF_DOWN
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jr z, .right
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ld d, 1
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call Map_ScrollDown
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ret
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.right:
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ld a, [keys]
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and PADF_RIGHT
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jr z, .left
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ld d, 1
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call Map_ScrollRight
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ret
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.left:
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ld a, [keys]
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and PADF_LEFT
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ret z
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ld d, 1
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call Map_ScrollLeft
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