/usr/share/z88dk/lib/oz_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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 | ; CRT0 for the Sharp OZ family
;
; Stefano Bodrato 13 Aug. 2002
;
; Mix of the Dominic's work and the Hi-Tech C modifications
; by the OZDEV team (Alexander R. Pruss, Green, etc..)
;
; all the "$" prefixes have been changed to "s_";
; the "$sp$" label is been changed to "s_sp".
;
; the "-DOZDK" enables the OZ7xx DK compatibility mode
; with extra functions and interrupt handling
; (this causes the DEFINED_ozgetch2 flag to be activated)
;
; - - - - - - -
;
; $Id: oz_crt0.asm,v 1.6 2007/06/27 20:49:27 dom Exp $
;
; - - - - - - -
MODULE oz_crt0
;-------
; Include zcc_opt.def to find out information about us
;-------
INCLUDE "zcc_opt.def"
;-------
; Some general scope declarations
;-------
XREF _main ;main() is always external to crt0 code
XDEF cleanup ;jp'd to by exit()
XDEF l_dcal ;jp(hl)
XDEF _std_seed ;Integer rand() seed
XDEF _vfprintf ;jp to the printf() core
XDEF exitsp ;atexit() variables
XDEF exitcount
XDEF __sgoioblk ;stdio info block
XDEF heaplast ;Near malloc heap variables
XDEF heapblocks
XDEF base_graphics ;Graphical variables
XDEF coords ;Current xy position
XDEF s_filetypetable
XDEF saved_hl ;Temporary store used by compiler
XDEF saved_de ;for hl and de
; --- OZ related stuff---
XDEF ozactivepage ;current mem page
XDEF ozmodel ;detected model (call "detect" first)
XDEF ozbacklight ;display light status
XDEF ozcontrast ;display contrast
XDEF ozbacklight_save
XDEF s_ozlcdstatus
XDEF s_init_unblank ;service entry point to go back from "ozfast" or "ozblankscreen"
XDEF ScrCharSet
IF DEFINED_ozgetch2
XDEF KeyBufGetPos ;
XDEF KeyBufPutPos ; don't
XDEF EnableKeyboard
XDEF KeyboardBuffer
ENDIF
; --- settings ---
XDEF ozkeyrepeatspeed
XDEF ozkeyrepeatdelay
XDEF ozclick_setting
XDEF ozautoofftime
XDEF ozautoblanktime
XDEF ozautolightofftime
XDEF ozprogoptions
; --- -------- ---
defc contrast = 0c026h
defc lcdstatus = 0c024h
org $8000
DEFB 00h, 64h, 09h, 0FEh, 31h, 26h, 48h, 41h
DEFB 30h, 31h, 32h, 0Dh, 75h, 31h, 03h, 0FEh, 5Ah, 0Fh
start:
jr skipname
ozfilename:
defm "BFILNAMEBAS"
defb 00
ozfileowner:
defw 65535
; __ozspare1start:
skipname:
in a,(1)
push af
in a,(2)
push af ; save starting 8000 page
ld a,2
out (1),a
ld a,4
out (2),a ; page first code page into 8000h
jp continue
continue:
ld a,(0c068h) ; backlight state
ld (ozbacklight),a
ld (ozbacklight_save),a
ld hl,(lcdstatus)
ld (s_ozlcdstatus),hl
ld a,(contrast)
ld (ozcontrast),a
di
in a,(7)
;ld (intset),a
ld (intset+1),a
ld a,0ffh-(16+128+1) ;; ARP: was 4+32 !!
out (7),a
call s_swapupperpages
;; now our code is paged in as follows:
;; 8000h: first code page, originally in page 406h
;; a000h: second code page, originally in page 407h
;; c000h: third code page, originally in page 408h
;; e000h: fourth code page, originally in page 409h
;; pages 408h and 409h store the initial contents of c000h-ffffh
;; sp points to 0fe00h
; clear BSS segment (lifted from Hi-Tech C init code, but modified)
;ld de,__Lbss ;Start of BSS segment
;or a ;clear carry
;ld hl,__Hbss
;sbc hl,de ;size of uninitialized data area
;jr z,EmptyBSS
;ld c,l
;ld b,h
;dec bc
;ld l,e
;ld h,d
;inc de
;ld (hl),0
;ldir ;clear memory
;EmptyBSS:
IF DEFINED_ozgetch2
ld hl,KeyBufGetPos
ld (hl),0
ld de,KeyBufGetPos+1
ld bc,26-1
ldir
; ld a,1
; out (19h),a
; ld a,10
; out (17h),a
; xor a
; out (18h),a
; ld a,2
; out (16h),a ;; enable key click
LIB ozcustomisr
LIB ozsetisr
ld hl,ozcustomisr
push hl
call ozsetisr ;; install our ISR
pop bc
ld a,l
or h
jr nz,__exit
ENDIF
;ld hl,1
;push hl
;call _ozclick
;pop hl
;ld hl,argv
;push hl
;ld hl,1
;push hl
;------- Z88DK specific code (begin) -------
ld (start1+1),sp ;Save entry stack
ld hl,-64
add hl,sp
ld sp,hl
ld (exitsp),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
;-------- Z88DK specific code (end) -------
call _main ;call main program
; __ozspare1end:
;------- Z88DK specific code (begin) -------
.cleanup
;
; Deallocate memory which has been allocated here!
;
IF !DEFINED_nostreams
IF DEFINED_ANSIstdio
LIB closeall
call closeall
ENDIF
ENDIF
.start1 ld sp,0 ;Restore stack to entry value
;ret
;-------- Z88DK specific code (end) -------
;pop hl
;pop hl ; argv (??)
_ozexitrestoreint:
_exit:
ld a,7
out (3),a
ld a,4
out (4),a ;; page in proper second page
;call __ozcallexitfunctions
__exit:
s_init_unblank: ; ozblankscreen or ozfast might have hidden everything;
call ret_only ; if so, ret_only is changed into "ozunblankscreen" to make it back visible.
di
;intset equ $+1
.intset ld a,0ffh
out (7),a
im 1
call s_swapupperpages
call s_clearbacklighttimer
;; restore a bunch of stuff
ld a,(ozbacklight_save)
ld (0c068h),a
ld hl,(s_ozlcdstatus)
ld (lcdstatus),hl ;; restore right LCD Status
ld a,(ozcontrast)
ld (contrast),a
IF DEFINED_ozgetch2
ld hl,KeyBufGetPos ;; put keyboard buffer in standard buffer
ld de,0c031h
ld bc,24
ldir
ENDIF
s_wipe_hook:
nop
nop
nop
; ld hl,0406h
; ld c,4
; out (c),h
; dec c
; out (c),l
; dec c
ld a,6
out (3),a
ld a,4
out (4),a
jp continue2+2000h
continue2:
; pop hl
; out (c),h
; dec c
; out (c),l ; restore starting page
pop af
out (2),a
pop af
out (1),a
xor a
out (22h),a ; restore default display page
ei
_bdos: ;; dummy routines
ret
s_sp:
defw 0fe00h
swapret: defw 0
s_swapupperpages: ;; must be called with interrupts disabled
pop bc
ld (s_swapupperpages_ret+1),bc
ld a,8
out (3),a
ld a,4 ; page in page 408 at 0a000h
out (4),a
ld d,0c0h
call s_swappage ; swap 0a000h page with 0c000h page
ld a,9
out (3),a
; ld a,4
; out (4),a ; page in page 409 at 0a000h
ld d,0e0h
call s_swappage ; swap 0a000h page with 0e000h page
ld hl,0
add hl,sp
ld de,(s_sp)
ld (s_sp),hl
ex de,hl
ld sp,hl
.s_swapupperpages_ret jp 0
;s_swapupperpages_ret equ $-2
s_swappage: ;; must be called with interrupts disabled!
;; swaps pages at a000 and at d*256
pop bc
ld (s_swappage_ret+1),bc
ld hl,0
add hl,sp
ld (s_saved_sp+1),hl
ld hl,0a000h
ld sp,hl
ld e,l
ex de,hl
ld a,h
add a,20h ; end marker
top:
pop bc ;10
ld e,(hl) ;7
ld (hl),c ;7
inc l ;4
ld d,(hl) ;7
ld (hl),b ;7
inc l ;4
push de ;11
pop de ;10 ;SP=SP+2
pop bc ;10
ld e,(hl)
ld (hl),c
inc l
ld d,(hl)
ld (hl),b
inc l
push de
pop de
jp nz,top ;10
inc h
cp h
jp nz,top
.s_saved_sp ld hl,0000 ;;
;s_saved_sp equ $-2 ;; self-mod
ld sp,hl
ld a,7
out (3),a
;; ld a,4
;; out (4),a ; page in second code page
.s_swappage_ret jp 0
;$swappage_ret equ $-2
s_32kintoff:
di
im 1
ret_only:
ret
s_32kinton:
ld a,0feh
ld i,a
im 2
ei
ret
s_clearbacklighttimer:
ld hl,0
ld (0c00dh),hl
ld hl,(s_ozlcdstatus)
ld (lcdstatus),hl
ret
ozbacklight:
defb 0
ozbacklight_save:
defb 0
ozcontrast:
defb 0
s_ozlcdstatus:
defw 0
IF DEFINED_ozgetch2
KeyBufGetPos: defb 0
KeyBufPutPos: defb 0
KeyboardBuffer: ; 123456789012345678901234
defm "(c)Pruss,Green,&c vZ88DK"
ENDIF
ScrCharSet: defb 1
;argv: defw __ozfilename
EnableKeyboard: defs 1
;HeapTop EQU 0f980h
;Model32k EQU 1
; --- settings - leave untouched ---
ozkeyrepeatspeed:
defb 5
ozkeyrepeatdelay:
defb 32
ozclick_setting:
defb 1
ozautoofftime:
defw 60*180 ;; 3 hours
ozautoblanktime:
defw 240 ;; 4 minutes
ozautolightofftime:
defw 120 ;; 2 minutes
ozprogoptions:
defb 0
;; padding (for future expansion)
defb 0,0,0,0
;------------------------------------------
;------------------------------------------
; End of startup part, routines following
;------------------------------------------
;------------------------------------------
.l_dcal
jp (hl)
; Now, define some values for stdin, stdout, stderr
IF (!DEFINED_nostreams) ~ (DEFINED_ANSIstdio) ; ~ = AND
.__sgoioblk
INCLUDE "#stdio_fp.asm"
ENDIF
;---------------------------------
; Select which printf core we want
;---------------------------------
._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
;-----------
; Now some variables
;-----------
.coords defw 0 ; Current graphics xy coordinates
base_graphics: defw A000h ; Address of the Graphics map
ozactivepage: defw 0400h ; Page number for the graph map (0400h for A000h)
ozmodel: defb -1 ; Set with "ozdetectmodel" (see libraries)
s_filetypetable: defw 0c089h
._std_seed defw 0 ; Seed for integer rand() routines
.exitsp defw 0 ; Address of where the atexit() stack is
.exitcount defb 0 ; How many routines on the atexit() stack
.heaplast defw 0 ; Address of last block on heap
.heapblocks defw 0 ; Number of blocks
.saved_hl defw 0 ; Temp store for hl
.saved_de defw 0 ; Temp store for de
defm "Small C+ OZ" ;Unnecessary file signature
defb 0
;-----------------------
; Floating point support
;-----------------------
IF NEED_floatpack
INCLUDE "#float.asm"
.fp_seed defb $80,$80,0,0,0,0 ;FP seed (unused ATM)
.extra defs 6 ;FP register
.fa defs 6 ;FP Accumulator
.fasign defb 0 ;FP register
ENDIF
|