mirror of
https://github.com/sehugg/8bitworkshop.git
synced 2024-11-22 14:33:51 +00:00
136 lines
2.7 KiB
ArmAsm
136 lines
2.7 KiB
ArmAsm
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.area _HOME
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.area _CODE
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.area _INITIALIZER
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.area _DATA
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.area _INITIALIZED
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.area _BSEG
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.area _BSS
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.area _HEAP
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;--------------------------------------------------------
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; File Created by SDCC : free open source ANSI-C Compiler
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; Version 3.6.5 # (UNIX)
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;--------------------------------------------------------
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.module minimal
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.optsdcc -mz80
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;--------------------------------------------------------
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; Public variables in this module
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;--------------------------------------------------------
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.globl _start
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.globl _tileram
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.globl _cellram
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.globl _main
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;--------------------------------------------------------
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; special function registers
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;--------------------------------------------------------
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_palette = 0x0040
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;--------------------------------------------------------
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; ram data
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;--------------------------------------------------------
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.area _DATA
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_cellram = 0xe000
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_tileram = 0xe800
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;--------------------------------------------------------
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; ram data
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;--------------------------------------------------------
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.area _INITIALIZED
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;--------------------------------------------------------
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; absolute external ram data
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;--------------------------------------------------------
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.area _DABS (ABS)
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;--------------------------------------------------------
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; global & static initialisations
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;--------------------------------------------------------
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.area _HOME
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.area _GSINIT
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.area _GSFINAL
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.area _GSINIT
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;--------------------------------------------------------
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; Home
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;--------------------------------------------------------
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.area _HOME
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.area _HOME
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;--------------------------------------------------------
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; code
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;--------------------------------------------------------
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.area _CODE
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;<stdin>:15:
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; ---------------------------------
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; Function start
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; ---------------------------------
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_start::
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;<stdin>:19:
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LD SP,#0xE800 ; 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,#<(_cellram)
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add a, l
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ld l,a
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ld a,#>(_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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.area _CODE
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.area _INITIALIZER
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.area _CABS (ABS)
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