/usr/share/z88dk/lib/sam_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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 | ; Startup fo SAM Coupe
;
; Stefano 26/3/2001
;
; If an error occurs eg break we just drop back to BASIC
;
; $Id: sam_crt0.asm,v 1.8 2007/06/27 20:49:28 dom Exp $
;
MODULE sam_crt0
;
; Initially include the zcc_opt.def file to find out lots of lovely
; information about what we should do..
;
INCLUDE "zcc_opt.def"
; No matter what set up we have, main is always, always external to
; this fileb
XREF _main
;
; Some variables which are needed for both app and basic startup
;
XDEF cleanup
XDEF l_dcal
; Integer rnd seed
XDEF _std_seed
; vprintf is internal to this file so we only ever include one of the set
; of routines
XDEF _vfprintf
; Exit variables
XDEF exitsp
XDEF exitcount
XDEF heaplast ;Near malloc heap variables
XDEF heapblocks
; For stdin, stdout, stder
XDEF __sgoioblk
; Graphics stuff
XDEF base_graphics
XDEF coords
; Sound stuff
XDEF snd_tick
; Now, getting to the real stuff now!
org 32768
.start
ld (start1+1),sp
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
; Special SAM stuff goes here
; Set screen to mode 0
ld a,0
call $15A ; JMODE
; set stream to channel 's' (upper screen)
ld a,2
call $112 ; JSETSTRM
; End of SAM stuff
call _main
.cleanup
;
; Deallocate memory which has been allocated here!
;
push hl
IF !DEFINED_nostreams
IF DEFINED_ANSIstdio
LIB closeall
call closeall
ENDIF
ENDIF
pop bc
; Special SAM stuff goes here
; End of SAM stuff
.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
;Seed for integer rand() routines
._std_seed defw 0
;Atexit routine
.exitsp
defw 0
.exitcount
defb 0
IF DEFINED_NEED1bitsound
.snd_tick defb 0 ; Sound variable
ENDIF
; Heap stuff
.heaplast defw 0
.heapblocks defw 0
; mem stuff
.base_graphics
defw 16384
.coords defw 0
defm "Small C+ SAM Coupe"
defb 0
;All the float stuff is kept in a different file...for ease of altering!
;It will eventually be integrated into the library
;
;Here we have a minor (minor!) problem, we've no idea if we need the
;float package if this is separated from main (we had this problem before
;but it wasn't critical..so, now we will have to read in a file from
;the directory (this will be produced by zcc) which tells us if we need
;the floatpackage, and if so what it is..kludgey, but it might just work!
;
;Brainwave time! The zcc_opt file could actually be written by the
;compiler as it goes through the modules, appending as necessary - this
;way we only include the package if we *really* need it!
IF NEED_floatpack
INCLUDE "#float.asm"
;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
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