/usr/share/z88dk/lib/cpc_crt0.asm is in z88dk-data 1.8.ds1-10.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 | ; CRT0 for the Amstrad CPC family
;
; Stefano Bodrato 8/6/2000
;
; $Id: cpc_crt0.asm,v 1.13 2008/05/26 06:38:07 stefano Exp $
;
MODULE cpc_crt0
;--------
; Include zcc_opt.def to find out some info
;--------
INCLUDE "zcc_opt.def"
;--------
; Some scope definitions
;--------
XREF _main ;main() is always external to crt0 code
XDEF cleanup ;jp'd to by exit()
XDEF l_dcal ;jp(hl)
XDEF _vfprintf ;jp to the printf() core
XDEF exitsp ;atexit() variables
XDEF exitcount
XDEF heaplast ;Near malloc heap variables
XDEF heapblocks
XDEF __sgoioblk ;stdio info block
XDEF base_graphics ;Graphical variables
XDEF coords ;Current xy position
XDEF snd_tick ;Sound variable
XDEF call_rom3 ;Interposer
XDEF firmware_bc ;Needed by the firmware interposer
;--------
; Set an origin for the application (-zorg=) default to $6000
;--------
IF !myzorg
defc myzorg = $6000
ENDIF
org myzorg
org myzorg
;--------
; REAL CODE
;--------
.start
ld hl,($39) ; Original Interrupt code
ld (oldint),hl
ld hl,newint ; Point to a null handler (increase stability)
ld ($39),hl
ld (start1+1),sp
ld hl,-6530
add hl,sp
ld sp,hl
ld (exitsp),sp
exx
ld (firmware_bc),bc ; keep BC', otherwise crash
exx
IF !DEFINED_nostreams
IF DEFINED_ANSIstdio
; Set up the std* stuff so we can be called again
ld hl,__sgoioblk+2
ld (hl),19 ;stdin
ld hl,__sgoioblk+6
ld (hl),21 ;stdout
ld hl,__sgoioblk+10
ld (hl),21 ;stderr
ENDIF
ENDIF
; INIT math identify platform
IF NEED_floatpack
LIB init_floatpack
call init_floatpack
ENDIF
call _main
.cleanup
;
; Deallocate memory which has been allocated here!
;
IF !DEFINED_nostreams
IF DEFINED_ANSIstdio
LIB closeall
call closeall
ENDIF
ENDIF
exx
ld bc,(firmware_bc) ; restore BC'
exx
ld hl,(oldint)
ld ($39),hl
.start1 ld sp,0
ret
.l_dcal jp (hl)
; Now, define some values for stdin, stdout, stderr
.__sgoioblk
IF DEFINED_ANSIstdio
INCLUDE "#stdio_fp.asm"
ELSE
defw -11,-12,-10
ENDIF
; Now, which of the vfprintf routines do we need?
._vfprintf
IF DEFINED_floatstdio
LIB vfprintf_fp
jp vfprintf_fp
ELSE
IF DEFINED_complexstdio
LIB vfprintf_comp
jp vfprintf_comp
ELSE
IF DEFINED_ministdio
LIB vfprintf_mini
jp vfprintf_mini
ENDIF
ENDIF
ENDIF
IF !DEFINED_HAVESEED
XDEF _std_seed ;Integer rand() seed
._std_seed defw 0 ; Seed for integer rand() routines
ENDIF
.exitsp defw 0 ; atexit
.exitcount defb 0
.base_graphics
defw $C000
.coords defw 0
.firmware_bc defw 0
.heaplast defw 0 ; Address of last block on heap
.heapblocks defw 0 ; Number of blocks
defm "Small C+ CPC"
defb 0
IF NEED_floatpack
INCLUDE "#float.asm"
;.init_floatpack
; ret
;seed for random number generator - not used yet..
.fp_seed defb $80,$80,0,0,0,0
;Floating point registers...
.extra defs 6
.fa defs 6
.fasign defb 0
ENDIF
.newint
ei
reti
.oldint
defw 0
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