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HEAD
Added heap support functions
[fw/sdcc]
/
device
/
lib
/
gbz80
/
crt0.s
1
;; Generic crt0.s for a GBZ80
2
.globl _main
3
4
.area _HEADER (ABS)
5
;; Reset vector
6
.org 0
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jp init
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.org 0x08
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reti
11
.org 0x10
12
reti
13
.org 0x18
14
reti
15
.org 0x20
16
reti
17
.org 0x28
18
reti
19
.org 0x30
20
reti
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.org 0x38
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reti
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.org 0x100
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jp 0x150
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27
.org 0x150
28
init:
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di
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;; Stack at the top of memory.
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ld sp,#0xdfff
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;; Setup global data
34
call gsinit
35
36
;; Use _main instead of main to bypass sdcc's intelligence
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call _main
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jp _exit
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;; Ordering of segments for the linker.
41
.area _CODE
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.area _GSINIT
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.area _GSFINAL
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.area _DATA
46
.area _BSS
47
.area _HEAP
48
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.area _CODE
50
__clock::
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ld a,#2
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rst 0x08
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ret
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_exit::
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;; Exit - special code to the emulator
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ld a,#0
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rst 0x08
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1$:
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halt
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jr 1$
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.area _GSINIT
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gsinit::
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.area _GSFINAL
67
ret