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97 lines
1.5 KiB
97 lines
1.5 KiB
include "video.inc"
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include "hardware.inc"
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section "home/video.asm@vram", vram[$9800]
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v_bgmap1:: ds $400
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v_bgmap2:: ds $400
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section "home/video.asm", rom0
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lcd_vblank_wait::
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ldh a, [r_ly]
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cp r_ly_vblank + 1
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jr nz, lcd_vblank_wait
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ret
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lcd_blank_wait::
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push af
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.loop
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ldh a, [r_stat]
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and r_stat_mode
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cp r_stat_mode_vblank + 1
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jr nc, .loop
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pop af
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ret
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lcd_disable::
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call lcd_vblank_wait
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ld hl, r_lcdc
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res r_lcdc_on_f, [hl]
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ld hl, r_ie
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res r_int_vblank_f, [hl]
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ret
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lcd_enable::
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ld hl, r_lcdc
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set r_lcdc_on_f, [hl]
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ld hl, r_if
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res r_int_vblank_f, [hl]
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ld hl, r_ie
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set r_int_vblank_f, [hl]
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ret
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vram_clear::
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xor a
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ld hl, mmap_vram
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ld bc, mmap_vram_end - mmap_vram
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call memset
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ld hl, mmap_oam
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ld bc, mmap_oam_end - mmap_oam
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jp memset
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vram_clear_bgmap::
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xor a
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ld hl, v_bgmap1
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ld bc, bgmap_width * bgmap_height
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jp memset
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; Set black/white palettes
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pals_set_bw::
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if def(ENABLE_CGB)
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ldh a, [h_console]
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cp console_cgb
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jr c, .dmg
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ld a, r_bcps_inc | 0 << r_bcps_pal_f | 0 << r_bcps_offs_f
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ld c, LOW(r_bcps)
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ldh [c], a
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inc c
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ld hl, .pal_bw
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ld b, 8
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.loop_pal_1
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ld a, [hl+]
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ldh [c], a
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dec b
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jr nz, .loop_pal_1
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ret
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endc
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.dmg
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ld a, $e4
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ld hl, r_bgp
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ld [hl+], a ; r_bgp
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ld [hl+], a ; r_obp0
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ld [hl+], a ; r_obp1
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ret
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if def(ENABLE_CGB)
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.pal_bw
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dw $7fff
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dw $5294
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dw $294a
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dw $0000
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endc
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