66 lines
1016 B
ArmAsm
66 lines
1016 B
ArmAsm
; crt0.s for ZX Spectrum
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.module crt0
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.globl _main
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.globl ___sdcc_call_hl
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; Ordering of segments for the linker - copied from sdcc crt0.s
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.area _CODE
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.area _INITIALIZER
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.area _HOME
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.area _GSINIT
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.area _GSFINAL
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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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.area _CODE
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_Start:
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di
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im 1
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; stack pointer already set by BIOS
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call gsinit ; Initialize global and static variables.
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call _main
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rst 0x0 ; Restart when main() returns.
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.area _GSINIT
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gsinit::
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; Implicitly zeroed global and static variables.
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ld bc, #l__DATA
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ld a, b
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or a, c
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jr Z, zeroed_data
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ld hl, #s__DATA
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ld (hl), #0x00
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dec bc
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ld a, b
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or a, c
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jr Z, zeroed_data
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ld e, l
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ld d, h
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inc de
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ldir
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zeroed_data:
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; Explicitly initialized global variables.
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ld bc, #l__INITIALIZER
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ld a, b
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or a, c
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jr Z, gsinit_static
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ld de, #s__INITIALIZED
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ld hl, #s__INITIALIZER
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ldir
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gsinit_static:
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; Explicitly initialized static variables inserted by compiler here.
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.area _GSFINAL
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ret
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.area _HOME
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