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55 lines
849 B
55 lines
849 B
4 years ago
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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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