mirror of
https://github.com/sehugg/8bitworkshop.git
synced 2024-11-27 01:51:35 +00:00
81 lines
967 B
Plaintext
81 lines
967 B
Plaintext
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_palette = 0x0040
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_cellram = 0xe000
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_tileram = 0xe800
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org $0000
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_start::
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;<stdin>:19:
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LD SP,$E800 ; set up stack pointer
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DI ; disable interrupts
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;<stdin>:20:
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jp _main
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;<stdin>:23:
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; ---------------------------------
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; Function main
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; ---------------------------------
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_main::
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;<stdin>:26:
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ld a,0x01
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out (_palette),a
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;<stdin>:27:
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ld hl,_tileram
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ld (hl), 0xfe
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ld e, l
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ld d, h
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inc de
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ld bc, 0x07ff
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ldir
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;<stdin>:28:
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ld hl,_cellram
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ld (hl), 0x00
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ld e, l
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ld d, h
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inc de
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ld bc, 0x07ff
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ldir
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;<stdin>:29:
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ld c,0x00
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;<stdin>:30:
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00112$:
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ld a,c
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rlca
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rlca
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rlca
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and a,0xf8
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ld e,a
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ld d,0x00
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00106$:
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;<stdin>:31:
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ld l,d
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ld h,0x00
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add hl, hl
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add hl, hl
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add hl, hl
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add hl, hl
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add hl, hl
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ld a,low (_cellram)
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add a, l
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ld l,a
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ld a,high (_cellram)
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adc a, h
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ld h,a
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ld b,0x00
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add hl, bc
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ld (hl),e
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;<stdin>:30:
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inc d
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ld a,d
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sub a, 0x20
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jr C,00106$
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;<stdin>:29:
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inc c
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ld a,c
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sub a, 0x20
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jr C,00112$
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;<stdin>:34:
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00104$:
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jr 00104$
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