Mercurial > hg > Members > kono > nitros9-code
annotate level1/modules/kernel.asm @ 1071:853a796a1bcd
Removed logbook
| author | boisy |
|---|---|
| date | Mon, 31 Mar 2003 14:10:56 +0000 |
| parents | dd89c62ea2ca |
| children | 607fcc81c5ae |
| rev | line source |
|---|---|
| 0 | 1 ******************************************************************** |
| 2 * OS9p1 - OS-9 Level One V2 P1 module | |
| 3 * | |
| 4 * $Id$ | |
| 5 * | |
| 6 * Ed. Comments Who YY/MM/DD | |
| 7 * ------------------------------------------------------------------ | |
| 201 | 8 * 14 From Tandy OS-9 Level One VR 02.00.00 |
| 300 | 9 * 15 Module validation consists only of module BGP 02/07/21 |
| 10 * header parity check. CRC check is not done | |
| 11 * unless D.CRC is set to 1, which is NOT the | |
| 12 * default case. By default, D.CRC is set | |
| 13 * to 0, thus there is no CRC checking. Speeds | |
| 14 * up module loads quite a bit. | |
| 306 | 15 * The Init module has a bit in a compatibility |
| 16 * byte that can turn on/off CRC checking | |
| 0 | 17 |
| 18 | |
| 19 nam OS9 | |
| 20 ttl OS-9 Level One V2 P1 module | |
| 21 | |
| 22 ifp1 | |
| 23 use defsfile | |
| 24 use scfdefs | |
| 25 endc | |
| 26 | |
| 27 tylg set Systm+Objct | |
| 28 atrv set ReEnt+rev | |
| 29 rev set $01 | |
| 300 | 30 edition set 15 |
| 0 | 31 |
| 32 L0000 mod eom,name,tylg,atrv,OS9Cold,size | |
| 33 | |
| 34 size equ . | |
| 35 | |
| 36 name fcs /OS9/ | |
| 37 fcb edition | |
| 38 | |
| 39 fcc /CC/ | |
| 40 | |
| 41 InitNam fcs /INIT/ | |
| 42 | |
| 43 P2Nam fcs /OS9P2/ | |
| 44 | |
| 45 VectCode bra SWI3Jmp | |
| 46 nop | |
| 47 bra SWI2Jmp | |
| 48 nop | |
| 49 bra SWIJmp | |
| 50 nop | |
| 51 bra NMIJmp | |
| 52 nop | |
| 53 bra IRQJmp | |
| 54 nop | |
| 55 bra FIRQJmp | |
| 56 | |
| 57 SWI3Jmp jmp [>D.SWI3] | |
| 58 SWI2Jmp jmp [>D.SWI2] | |
| 59 SWIJmp jmp [>D.SWI] | |
| 60 NMIJmp jmp [>D.NMI] | |
| 61 IRQJmp jmp [>D.IRQ] | |
| 62 FIRQJmp jmp [>D.FIRQ] | |
| 63 VectCSz equ *-VectCode | |
| 64 | |
| 65 | |
| 66 SysTbl fcb F$Link | |
| 67 fdb FLink-*-2 | |
| 68 | |
| 69 fcb F$Fork | |
| 70 fdb FFork-*-2 | |
| 71 | |
| 72 fcb F$Chain | |
| 73 fdb FChain-*-2 | |
| 74 | |
| 75 fcb F$Chain+$80 | |
| 76 fdb SFChain-*-2 | |
| 77 | |
| 78 fcb F$PrsNam | |
| 79 fdb FPrsNam-*-2 | |
| 80 | |
| 81 fcb F$CmpNam | |
| 82 fdb FCmpNam-*-2 | |
| 83 | |
| 84 fcb F$SchBit | |
| 85 fdb FSchBit-*-2 | |
| 86 | |
| 87 fcb F$AllBit | |
| 88 fdb FAllBit-*-2 | |
| 89 | |
| 90 fcb F$DelBit | |
| 91 fdb FDelBit-*-2 | |
| 92 | |
| 93 fcb F$CRC | |
| 94 fdb FCRC-*-2 | |
| 95 | |
| 96 fcb F$SRqMem+$80 | |
| 97 fdb FSRqMem-*-2 | |
| 98 | |
| 99 fcb F$SRtMem+$80 | |
| 100 fdb FSRtMem-*-2 | |
| 101 | |
| 102 fcb F$AProc+$80 | |
| 103 fdb FAProc-*-2 | |
| 104 | |
| 105 fcb F$NProc+$80 | |
| 106 fdb FNProc-*-2 | |
| 107 | |
| 108 fcb F$VModul+$80 | |
| 109 fdb FVModul-*-2 | |
| 110 | |
| 111 fcb F$SSvc | |
| 112 fdb FSSvc-*-2 | |
| 113 | |
| 114 fcb $80 | |
| 115 | |
| 116 * | |
| 117 * OS-9 Genesis! | |
| 118 OS9Cold equ * | |
| 119 * clear out system globals from $0020-$0400 | |
| 120 ldx #D.FMBM | |
| 121 ldy #$400-D.FMBM | |
| 122 clra | |
| 123 clrb | |
| 124 L007F std ,x++ | |
| 125 leay -2,y | |
| 126 bne L007F | |
| 127 * set up system globals | |
| 128 inca | |
| 129 inca D = $200 | |
| 130 std <D.FMBM $200 = start of free memory bitmap | |
| 131 addb #$20 | |
| 132 std <D.FMBM+2 $220 = end of free memory bitmap | |
| 133 addb #$02 | |
| 134 std <D.SysDis $222 = addr of sys dispatch tbl | |
| 135 addb #$70 | |
| 296 | 136 std <D.UsrDis $292 = addr of usr dispatch tbl |
| 0 | 137 clrb |
| 138 inca D = $300 | |
| 139 std <D.ModDir $300 = mod dir start | |
| 140 stx <D.ModDir+2 X = $400 = mod dir end | |
| 141 leas >$0100,x S = $500 (system stack?) | |
| 142 | |
| 143 * Check for valid RAM starting at $400 | |
| 144 ChkRAM leay ,x | |
| 145 ldd ,y store org contents in D | |
| 146 ldx #$00FF | |
| 147 stx ,y write pattern to ,Y | |
| 148 cmpx ,y same as what we wrote? | |
| 149 bne L00C2 nope, not RAM here! | |
| 150 ldx #$FF00 try different pattern | |
| 151 stx ,y write it to ,Y | |
| 152 cmpx ,y same as what we wrote? | |
| 153 bne L00C2 nope, not RAM here! | |
| 154 std ,y else restore org contents | |
| 155 leax >$0100,y check top of next 256 block | |
|
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os9.asm and oscode.asm now use BTStart symbolic from systype
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156 cmpx #BTStart stop short of boot track mem |
| 0 | 157 bcs ChkRAM |
| 158 leay ,x | |
| 159 * Here, Y = end of RAM | |
| 160 L00C2 leax ,y X = end of RAM | |
| 161 stx <D.MLIM save off memory limit | |
| 162 | |
| 163 * Copy vector code over to address $100 | |
| 164 pshs y,x | |
| 165 leax >VectCode,pcr | |
| 247 | 166 ldy #D.XSWI3 |
| 0 | 167 ldb #VectCSz |
| 168 L00D2 lda ,x+ | |
| 169 sta ,y+ | |
| 170 decb | |
| 171 bne L00D2 | |
| 172 puls y,x | |
| 173 * validate modules at top of RAM (kernel, etc.) | |
| 174 L00DB lbsr ValMod | |
| 175 bcs L00E6 | |
| 176 ldd M$Size,x | |
| 177 leax d,x go past module | |
| 178 bra L00EC | |
| 179 L00E6 cmpb #E$KwnMod | |
| 180 beq L00EE | |
| 181 leax 1,x | |
| 182 L00EC bne L00DB | |
| 183 | |
| 184 * copy vectors to system globals | |
| 185 L00EE leay >Vectors,pcr | |
| 186 leax >L0000,pcr | |
| 187 pshs x | |
| 188 ldx #D.SWI3 | |
| 189 L00FB ldd ,y++ | |
| 190 addd ,s | |
| 191 std ,x++ | |
| 192 cmpx #$0036 | |
| 193 bls L00FB | |
| 194 leas 2,s restore stack | |
| 195 | |
| 196 * fill in more system globals | |
| 197 leax >URtoSs,pcr | |
| 198 stx <D.URtoSs | |
| 199 leax >UsrIRQ,pcr | |
| 200 stx <D.UsrIRQ | |
| 201 leax >UsrSvc,pcr | |
| 202 stx <D.UsrSvc | |
| 203 leax >SysIRQ,pcr | |
| 204 stx <D.SysIRQ | |
| 205 stx <D.SvcIRQ | |
| 206 leax >SysSvc,pcr | |
| 207 stx <D.SysSvc | |
| 208 stx <D.SWI2 | |
| 209 leax >Poll,pcr | |
| 210 stx <D.Poll | |
| 211 leax >Clock,pcr | |
| 212 stx <D.Clock | |
| 213 stx <D.AltIRQ | |
| 214 | |
| 215 * install system calls | |
| 216 leay >SysTbl,pcr | |
| 217 lbsr InstSSvc | |
| 218 | |
| 219 * link to init module | |
| 220 lda #Systm+0 | |
| 221 leax >InitNam,pcr | |
| 222 os9 F$Link | |
| 223 lbcs OS9Cold | |
| 224 stu <D.Init | |
| 308 | 225 lda Feature1,u get feature byte 1 |
| 306 | 226 bita #CRCOn CRC on? |
| 227 beq GetMem branch if not (already cleared earlier) | |
| 228 inc <D.CRC else turn on CRC checking | |
| 229 GetMem ldd MaxMem+1,u | |
| 0 | 230 clrb |
| 231 cmpd <D.MLIM | |
| 232 bcc L0158 | |
| 233 std <D.MLIM | |
| 234 L0158 ldx <D.FMBM | |
| 235 ldb #$F8 | |
| 236 stb ,x | |
| 237 clra | |
| 238 ldb <D.MLIM | |
| 239 negb | |
| 240 tfr d,y | |
| 241 negb | |
| 242 lbsr L065A | |
| 243 | |
| 244 * jump into OS9p2 here | |
| 245 leax >P2Nam,pcr | |
| 246 lda #Systm+Objct | |
| 247 os9 F$Link | |
| 248 lbcs OS9Cold | |
| 249 jmp ,y | |
| 165 | 250 SWI3 pshs pc,x,b |
| 0 | 251 ldb #P$SWI3 |
| 252 bra L018C | |
| 165 | 253 SWI2 pshs pc,x,b |
| 0 | 254 ldb #P$SWI2 |
| 255 bra L018C | |
| 247 | 256 DUMMY rti |
| 165 | 257 SVCIRQ jmp [>D.SvcIRQ] |
| 258 SWI pshs pc,x,b | |
| 0 | 259 ldb #P$SWI |
| 260 L018C ldx >D.Proc | |
| 261 ldx b,x get SWI entry | |
| 262 stx 3,s put in PC on stack | |
| 263 puls pc,x,b | |
| 264 | |
| 265 UsrIRQ leay <L01B1,pcr | |
| 266 * transition from user to system state | |
| 267 URtoSs clra | |
| 268 tfr a,dp clear direct page | |
| 269 ldx <D.Proc | |
| 270 ldd <D.SysSvc | |
| 271 std <D.SWI2 | |
| 272 ldd <D.SysIRQ | |
| 273 std <D.SvcIRQ | |
| 274 leau ,s | |
| 275 stu P$SP,x | |
| 276 lda P$State,x | |
| 277 ora #SysState | |
| 278 sta P$State,x | |
| 279 jmp ,y | |
| 280 | |
| 281 L01B1 jsr [>D.Poll] | |
| 282 bcc L01BD | |
| 283 ldb ,s | |
| 284 orb #$10 | |
| 285 stb ,s | |
| 286 L01BD lbra L0255 | |
| 287 | |
| 288 SysIRQ clra | |
| 289 tfr a,dp | |
| 290 jsr [>D.Poll] | |
| 291 bcc L01CF | |
| 292 ldb ,s | |
| 293 orb #$10 | |
| 294 stb ,s | |
| 295 L01CF rti | |
| 296 Poll comb | |
| 297 rts | |
| 298 | |
| 299 Clock ldx <D.SProcQ | |
| 300 beq L01FD | |
| 301 lda P$State,x | |
| 302 bita #TimSleep | |
| 303 beq L01FD | |
| 304 ldu P$SP,x | |
| 305 ldd P$SP,u | |
| 306 subd #$0001 | |
| 307 std P$SP,u | |
| 308 bne L01FD | |
| 309 L01E7 ldu P$Queue,x | |
| 310 bsr L021A | |
| 311 leax ,u | |
| 312 beq L01FB | |
| 313 lda P$State,x | |
| 314 bita #TimSleep | |
| 315 beq L01FB | |
| 316 ldu P$SP,x | |
| 317 ldd P$SP,u | |
| 318 beq L01E7 | |
| 319 L01FB stx <D.SProcQ | |
| 320 L01FD dec <D.Slice | |
| 321 bne ClockRTI | |
| 322 lda <D.TSlice | |
| 323 sta <D.Slice | |
| 324 ldx <D.Proc | |
| 325 beq ClockRTI | |
| 326 lda P$State,x | |
| 327 ora #TimOut | |
| 328 sta P$State,x | |
| 329 bpl L0212 branch if not system state | |
| 330 ClockRTI rti | |
| 331 | |
| 332 L0212 leay >L0255,pcr | |
| 333 bra URtoSs | |
| 334 | |
| 335 * X = proc desc | |
| 336 FAProc ldx R$X,u | |
| 337 L021A pshs u,y | |
| 338 ldu #$003F | |
| 339 bra L0228 | |
| 340 L0221 ldb P$Age,u | |
| 341 incb | |
| 342 beq L0228 | |
| 343 stb P$Age,u | |
| 344 L0228 ldu P$Queue,u U = proc desc | |
| 345 bne L0221 | |
| 346 ldu #$003F | |
| 347 lda P$Prior,x | |
| 348 sta P$Age,x | |
| 349 orcc #IntMasks | |
| 350 L0235 leay ,u | |
| 351 ldu P$Queue,u | |
| 352 beq L023F | |
| 353 cmpa P$Age,u | |
| 354 bls L0235 | |
| 355 L023F stu P$Queue,x | |
| 356 stx P$Queue,y | |
| 357 clrb | |
| 358 puls pc,u,y | |
| 359 | |
| 360 UsrSvc leay <L024E,pcr | |
| 361 orcc #IntMasks | |
| 362 lbra URtoSs | |
| 363 | |
| 364 L024E andcc #^IntMasks | |
| 365 ldy <D.UsrDis | |
| 366 bsr L0278 | |
| 367 L0255 ldx <D.Proc get current proc desc | |
| 368 beq FNProc branch to FNProc if none | |
| 369 orcc #IntMasks | |
| 370 ldb P$State,x | |
| 371 andb #^SysState | |
| 372 stb P$State,x | |
| 373 bitb #TimOut | |
| 374 beq L02D1 | |
| 375 andb #^TimOut | |
| 376 stb P$State,x | |
| 377 bsr L021A | |
| 378 bra FNProc | |
| 379 | |
| 380 * system call entry | |
| 381 SysSvc clra | |
| 382 tfr a,dp set direct page to 0 | |
| 383 leau ,s | |
| 384 ldy <D.SysDis | |
| 385 bsr L0278 | |
| 386 rti | |
| 387 | |
| 388 L0278 pshs u | |
| 389 ldx R$PC,u point X to PC | |
| 390 ldb ,x+ get func code at X | |
| 391 stx R$PC,u restore updated PC | |
| 392 lslb multiply by 2 | |
| 393 bcc L0288 branch if user call | |
| 394 rorb | |
| 395 ldx -2,y | |
| 396 bra L0290 | |
| 397 L0288 cmpb #$6E | |
| 398 bcc L02A7 | |
| 399 ldx b,y X = addr of system call | |
| 400 beq L02A7 | |
| 401 L0290 jsr ,x jsr into system call | |
| 402 L0292 puls u | |
| 403 tfr cc,a | |
| 404 bcc FixCC branch if no error | |
| 405 stb R$B,u store error code | |
| 406 FixCC ldb R$CC,u get caller's CC | |
| 407 andb #^(Negative+Zero+TwosOvfl+Carry) | |
| 408 stb R$CC,u | |
| 409 anda #Negative+Zero+TwosOvfl+Carry | |
| 410 ora R$CC,u | |
| 411 sta R$CC,u | |
| 412 rts | |
| 413 L02A7 comb | |
| 414 ldb #E$UnkSvc | |
| 415 bra L0292 | |
| 416 | |
| 417 * no signal handler, exit with signal value as exit code | |
| 418 L02AC ldb P$State,x | |
| 419 orb #SysState | |
| 420 stb P$State,x | |
| 421 ldb <P$Signal,x | |
| 422 andcc #^(IntMasks) | |
| 423 os9 F$Exit | |
| 424 | |
| 425 FNProc clra | |
| 426 clrb | |
| 427 std <D.Proc | |
| 428 bra L02C2 | |
| 429 * execution goes here when there are no active processes | |
| 430 L02C0 cwai #^(IntMasks) | |
| 431 L02C2 orcc #IntMasks | |
| 432 ldx <D.AProcQ get next active process | |
| 433 beq L02C0 CWAI if none | |
| 434 ldd P$Queue,x get queue ptr | |
| 435 std <D.AProcQ store in Active Q | |
| 436 stx <D.Proc store in current process | |
| 437 lds P$SP,x get process' stack ptr | |
| 438 L02D1 ldb P$State,x get state | |
| 439 bmi L0308 branch if system state | |
| 440 bitb #Condem process condemned? | |
| 441 bne L02AC branch if so... | |
| 442 ldb <P$Signal,x get signal no | |
| 443 beq L02FF branch if none | |
| 444 decb decrement | |
| 445 beq L02FC branch if wake up | |
| 446 ldu <P$SigVec,x get signal handler addr | |
| 447 beq L02AC branch if none | |
| 448 ldy <P$SigDat,x get data addr | |
| 449 ldd $06,s | |
| 450 pshs u,y,b,a | |
| 451 ldu $0A,s | |
| 452 lda <P$Signal,x | |
| 453 ldb $09,s | |
| 454 tfr d,y | |
| 455 ldd $06,s | |
| 456 pshs u,y,b,a | |
| 457 clrb | |
| 458 L02FC stb <P$Signal,x | |
| 459 L02FF ldd <P$SWI2,x | |
| 460 std <D.SWI2 | |
| 461 ldd <D.UsrIRQ | |
| 462 std <D.SvcIRQ | |
| 463 L0308 rti | |
| 464 | |
| 465 FLink pshs u save caller regs | |
| 466 ldd R$A,u | |
| 467 ldx R$X,u | |
| 468 lbsr L0443 | |
| 469 bcc FLinkOK | |
| 470 ldb #E$MNF | |
| 471 bra L033D | |
| 472 * U = module dir entry | |
| 473 FLinkOK ldy ,u get module ptr | |
| 474 ldb M$Revs,y | |
| 475 bitb #ReEnt reentrant? | |
| 476 bne L032A branch if so | |
| 477 tst $02,u link count zero? | |
| 478 beq L032A yep, ok to link to nonreent | |
| 479 comb else module is busy | |
| 480 ldb #E$ModBsy | |
| 481 bra L033D | |
| 482 L032A inc $02,u increment link count | |
| 483 ldu ,s get caller regs from stack | |
| 484 stx R$X,u | |
| 485 sty R$U,u | |
| 486 ldd M$Type,y | |
| 487 std R$D,u | |
| 488 ldd M$IDSize,y | |
| 489 leax d,y | |
| 490 stx R$Y,u | |
| 491 L033D puls pc,u | |
| 492 | |
| 493 FVModul pshs u | |
| 494 ldx R$X,u | |
| 495 bsr ValMod | |
| 496 puls y | |
| 497 stu R$U,y | |
| 498 rts | |
| 499 * X = address of module to validate | |
| 500 ValMod bsr ChkMHCRC | |
| 501 bcs L039A | |
| 502 lda M$Type,x | |
| 503 pshs x,a | |
| 504 ldd M$Name,x | |
| 505 leax d,x X = addr of name in mod | |
| 506 puls a | |
| 507 lbsr L0443 | |
| 508 puls x | |
| 509 bcs L039B | |
| 510 ldb #E$KwnMod | |
| 511 cmpx ,u | |
| 512 beq L03A1 | |
| 513 lda M$Revs,x | |
| 514 anda #RevsMask | |
| 515 pshs a | |
| 516 ldy ,u | |
| 517 lda M$Revs,y | |
| 518 anda #RevsMask | |
| 519 cmpa ,s+ same revision as other mod? | |
| 520 bcc L03A1 | |
| 521 pshs y,x | |
| 522 ldb M$Size,u | |
| 523 bne L0395 | |
| 524 ldx ,u | |
| 525 cmpx <D.BTLO | |
| 526 bcc L0395 | |
| 527 ldd $02,x | |
| 528 addd #$00FF | |
| 529 tfr a,b | |
| 530 clra | |
| 531 tfr d,y | |
| 532 ldb ,u | |
| 533 ldx <D.FMBM | |
| 534 os9 F$DelBit | |
| 535 clr $02,u | |
| 536 L0395 puls y,x | |
| 537 L0397 stx ,u | |
| 538 clrb | |
| 539 L039A rts | |
| 540 L039B leay ,u | |
| 541 bne L0397 | |
| 542 ldb #E$DirFul | |
| 543 L03A1 coma | |
| 544 rts | |
| 545 | |
| 546 * check module header and CRC | |
| 547 * X = address of potential module | |
| 548 ChkMHCRC ldd ,x | |
| 549 cmpd #M$ID12 sync bytes? | |
| 550 bne L03B1 nope, not a module here | |
| 551 leay M$Parity,x | |
| 552 bsr ChkMHPar check header parity | |
| 553 bcc L03B5 branch if ok | |
| 554 L03B1 comb | |
| 555 ldb #E$BMID | |
| 556 rts | |
|
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557 |
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558 L03B5 |
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559 * Following 4 lines added to support no CRC checks - 2002/07/21 |
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560 lda <D.CRC is CRC checking on? |
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561 bne DoCRCCk branch if so |
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562 clrb |
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563 rts |
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564 |
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565 DoCRCCk pshs x |
| 0 | 566 ldy M$Size,x |
| 567 bsr ChkMCRC checkm module CRC | |
| 568 puls pc,x | |
| 569 * check module header parity | |
| 570 * Y = pointer to parity byte | |
| 571 ChkMHPar pshs y,x | |
| 572 clra | |
| 573 ChkM010 eora ,x+ | |
| 574 cmpx 2,s compare to addr of M$Parity | |
| 575 bls ChkM010 | |
| 576 cmpa #$FF | |
| 577 puls pc,y,x | |
| 578 * X = address of potential module | |
| 579 * Y = size of module | |
| 580 ChkMCRC ldd #$FFFF | |
| 581 pshs b,a | |
| 582 pshs b,a | |
| 583 leau 1,s | |
| 584 L03D4 lda ,x+ | |
| 585 bsr CRCAlgo | |
| 586 leay -1,y dec Y (size of module) | |
| 587 bne L03D4 continue | |
| 588 clr -1,u | |
| 589 lda ,u | |
| 590 cmpa #CRCCon1 | |
| 591 bne L03EC | |
| 592 ldd 1,u | |
| 593 cmpd #CRCCon23 | |
| 594 beq L03EF | |
| 595 L03EC comb | |
| 596 ldb #E$BMCRC | |
| 597 L03EF puls pc,y,x | |
| 598 | |
| 599 * F$CRC | |
| 600 FCRC ldx R$X,u | |
| 601 ldy R$Y,u | |
| 602 beq L0402 | |
| 603 ldu R$U,u | |
| 604 L03FA lda ,x+ | |
| 605 bsr CRCAlgo | |
| 606 leay -1,y | |
| 607 bne L03FA | |
| 608 L0402 clrb | |
| 609 rts | |
| 610 | |
| 611 CRCAlgo eora ,u | |
| 612 pshs a | |
| 613 ldd $01,u | |
| 614 std ,u | |
| 615 clra | |
| 616 ldb ,s | |
| 617 lslb | |
| 618 rola | |
| 619 eora 1,u | |
| 620 std 1,u | |
| 621 clrb | |
| 622 lda ,s | |
| 623 lsra | |
| 624 rorb | |
| 625 lsra | |
| 626 rorb | |
| 627 eora 1,u | |
| 628 eorb 2,u | |
| 629 std 1,u | |
| 630 lda ,s | |
| 631 lsla | |
| 632 eora ,s | |
| 633 sta ,s | |
| 634 lsla | |
| 635 lsla | |
| 636 eora ,s | |
| 637 sta ,s | |
| 638 lsla | |
| 639 lsla | |
| 640 lsla | |
| 641 lsla | |
| 642 eora ,s+ | |
| 643 bpl L0442 | |
| 644 ldd #$8021 | |
| 645 eora ,u | |
| 646 sta ,u | |
| 647 eorb 2,u | |
| 648 stb 2,u | |
| 649 L0442 rts | |
| 650 | |
| 651 L0443 ldu #$0000 | |
| 652 tfr a,b | |
| 653 anda #TypeMask | |
| 654 andb #LangMask | |
| 655 pshs u,y,x,b,a | |
| 656 bsr EatSpace | |
| 657 cmpa #PDELIM pathlist char? | |
| 658 beq L049C branch if so | |
| 659 lbsr L074D parse name | |
| 660 bcs L049D return if error | |
| 661 ldu <D.ModDir | |
| 662 L045B pshs u,y,b | |
| 663 ldu ,u | |
| 664 beq L048B | |
| 665 ldd $04,u | |
| 666 leay d,u | |
| 667 ldb ,s | |
| 668 lbsr L07AB | |
| 669 bcs L0493 | |
| 670 lda $05,s | |
| 671 beq L0476 | |
| 672 eora $06,u | |
| 673 anda #$F0 | |
| 674 bne L0493 | |
| 675 L0476 lda $06,s | |
| 676 beq L0480 | |
| 677 eora $06,u | |
| 678 anda #$0F | |
| 679 bne L0493 | |
| 680 L0480 puls u,x,b | |
| 681 stu $06,s | |
| 682 bsr EatSpace | |
| 683 stx $02,s | |
| 684 clra | |
| 685 bra L049D | |
| 686 L048B ldd $0B,s | |
| 687 bne L0493 | |
| 688 ldd $03,s | |
| 689 std $0B,s | |
| 690 L0493 puls u,y,b | |
| 691 leau $04,u | |
| 692 cmpu <D.ModDir+2 | |
| 693 bcs L045B | |
| 694 L049C comb | |
| 695 L049D puls pc,u,y,x,b,a | |
| 696 | |
| 697 EatSpace lda #C$SPAC | |
| 698 EatSpc10 cmpa ,x+ | |
| 699 beq EatSpc10 | |
| 700 lda ,-x | |
| 701 rts | |
| 702 | |
| 703 FFork ldx <D.PrcDBT | |
| 704 os9 F$All64 | |
| 705 bcs L0517 | |
| 706 ldx <D.Proc | |
| 707 pshs x save calling proc desc on stack | |
| 708 ldd P$User,x | |
| 709 std P$User,y | |
| 710 lda P$Prior,x | |
| 711 clrb | |
| 712 std P$Prior,y | |
| 713 ldb #SysState | |
| 714 stb P$State,y | |
| 715 sty <D.Proc | |
| 716 ldd <P$NIO,x | |
| 717 std <P$NIO,y | |
| 718 ldd <P$NIO+2,x | |
| 719 std <P$NIO+2,y | |
| 720 leax <P$DIO,x | |
| 721 leay <P$DIO,y | |
| 722 ldb #DefIOSiz | |
| 723 * copy I/O stuff from parent to child | |
| 724 L04D7 lda ,x+ | |
| 725 sta ,y+ | |
| 726 decb | |
| 727 bne L04D7 | |
| 728 * X/Y = address of path table in respective proc desc | |
| 729 * Dup stdin/stdout/stderr | |
| 730 ldb #$03 | |
| 731 L04E0 lda ,x+ | |
| 732 os9 I$Dup | |
| 733 bcc L04E8 | |
| 734 clra | |
| 735 L04E8 sta ,y+ | |
| 736 decb | |
| 737 bne L04E0 | |
| 738 bsr L0553 | |
| 739 bcs L050C | |
| 740 puls y get parent proc desc | |
| 741 sty <D.Proc | |
| 742 lda P$ID,x get ID of new process | |
| 743 sta R$A,u store in caller's A | |
| 744 ldb P$CID,y get child id of parent | |
| 745 sta P$CID,y store new proc in parent's CID | |
| 746 lda P$ID,y get ID of parent | |
| 747 std P$PID,x store in child proc desc | |
| 748 ldb P$State,x update state of child | |
| 749 andb #^SysState | |
| 750 stb P$State,x | |
| 751 os9 F$AProc insert child in active Q | |
| 752 rts | |
| 753 L050C pshs b | |
| 754 os9 F$Exit | |
| 755 comb | |
| 756 puls x,b | |
| 757 stx <D.Proc | |
| 758 rts | |
| 759 L0517 comb | |
| 760 ldb #E$PrcFul | |
| 761 rts | |
| 762 | |
| 763 FChain bsr L0543 | |
| 764 bcs L0531 | |
| 765 orcc #IntMasks | |
| 766 ldb $0D,x | |
| 767 andb #$7F | |
| 768 stb $0D,x | |
| 769 L0527 os9 F$AProc | |
| 770 os9 F$NProc | |
| 771 | |
| 772 SFChain bsr L0543 | |
| 773 bcc L0527 | |
| 774 L0531 pshs b | |
| 775 stb <P$Signal,x | |
| 776 ldb P$State,x | |
| 777 orb #Condem | |
| 778 stb P$State,x | |
| 779 ldb #$FF | |
| 780 stb P$Prior,x | |
| 781 comb | |
| 782 puls pc,b | |
| 783 L0543 pshs u | |
| 784 ldx <D.Proc | |
| 785 ldu <P$PModul,x | |
| 786 os9 F$UnLink | |
| 787 ldu ,s | |
| 788 bsr L0553 | |
| 789 puls pc,u | |
| 790 L0553 ldx <D.Proc | |
| 791 pshs u,x | |
| 792 ldd <D.UsrSvc | |
| 793 std <P$SWI,x | |
| 794 std <P$SWI2,x | |
| 795 std <P$SWI3,x | |
| 796 clra | |
| 797 clrb | |
| 798 sta <P$Signal,x | |
| 799 std <P$SigVec,x | |
| 800 lda R$A,u | |
| 801 ldx R$X,u | |
| 802 os9 F$Link | |
| 803 bcc L0578 | |
| 804 os9 F$Load | |
| 805 bcs L05E7 | |
| 806 L0578 ldy <D.Proc | |
| 807 stu <P$PModul,y | |
| 808 cmpa #Prgrm+Objct | |
| 809 beq L058B | |
| 810 cmpa #Systm+Objct | |
| 811 beq L058B | |
| 812 comb | |
| 813 ldb #E$NEMod | |
| 814 bra L05E7 | |
| 815 L058B leay ,u Y = addr of module | |
| 816 ldu 2,s get U off stack (caller regs) | |
| 817 stx R$X,u | |
| 818 lda R$B,u | |
| 819 clrb | |
| 820 cmpd M$Mem,y compare passed mem to module's | |
| 821 bcc L059B branch if less than | |
| 822 ldd M$Mem,y | |
| 823 L059B addd #$0000 | |
| 824 bne L05A0 | |
| 825 L05A0 os9 F$Mem | |
| 826 bcs L05E7 | |
| 827 subd #R$Size subtract registers | |
| 828 subd R$Y,u subtract parameter area | |
| 829 bcs L05E5 | |
| 830 ldx R$U,u get parameter area | |
| 831 ldd R$Y,u get parameter size | |
| 832 pshs b,a | |
| 833 beq L05BE | |
| 834 leax d,x point to end of param area | |
| 835 L05B6 lda ,-x get byte, dec X | |
| 836 sta ,-y save byte in data area, dec X | |
| 837 cmpx R$U,u at top of param area? | |
| 838 bhi L05B6 | |
| 839 * set up registers for return of F$Fork/F$Chain | |
| 840 L05BE ldx <D.Proc | |
| 841 sty -$08,y put in X on caller stack | |
| 842 leay -R$Size,y back up register size | |
| 843 sty P$SP,x | |
| 844 lda P$ADDR,x | |
| 845 clrb | |
| 846 std R$U,y lowest address | |
| 847 sta R$DP,y set direct page | |
| 848 adda P$PagCnt,x | |
| 849 std R$Y,y | |
| 850 puls b,a | |
| 851 std R$D,y size of param area | |
| 852 ldb #Entire | |
| 853 stb R$CC,y | |
| 854 ldu <P$PModul,x get addr of prim. mod | |
| 855 ldd M$Exec,u | |
| 856 leau d,u | |
| 857 stu R$PC,y put in PC on caller reg | |
| 858 clrb | |
| 859 L05E5 ldb #E$IForkP | |
| 860 L05E7 puls pc,u,x | |
| 861 | |
| 862 FSRqMem ldd R$D,u | |
| 863 addd #$00FF | |
| 864 clrb | |
| 865 std R$D,u | |
| 866 ldx <D.FMBM+2 | |
| 867 ldd #$01FF | |
| 868 pshs b,a | |
| 869 bra L0604 | |
| 870 L05FA dec $01,s | |
| 871 ldb $01,s | |
| 872 L05FE lsl ,s | |
| 873 bcc L060A | |
| 874 rol ,s | |
| 875 L0604 leax -1,x | |
| 876 cmpx <D.FMBM | |
| 877 bcs L0620 | |
| 878 L060A lda ,x | |
| 879 anda ,s | |
| 880 bne L05FA | |
| 881 dec 1,s | |
| 882 subb 1,s | |
| 883 cmpb 1,u | |
| 884 rora | |
| 885 addb 1,s | |
| 886 rola | |
| 887 bcs L05FE | |
| 888 ldb 1,s | |
| 889 clra | |
| 890 incb | |
| 891 L0620 leas 2,s | |
| 892 bcs L0635 | |
| 893 ldx <D.FMBM | |
| 894 tfr d,y | |
| 895 ldb 1,u | |
| 896 clra | |
| 897 exg d,y | |
| 898 bsr L065A | |
| 899 exg a,b | |
| 900 std 8,u | |
| 901 L0633 clra | |
| 902 rts | |
| 903 L0635 comb | |
| 904 ldb #E$MemFul | |
| 905 rts | |
| 906 | |
| 907 FSRtMem ldd R$D,u | |
| 908 addd #$00FF | |
| 909 tfr a,b | |
| 910 clra | |
| 911 tfr d,y | |
| 912 ldd R$U,u | |
| 913 beq L0633 | |
| 914 tstb | |
| 915 beq L064E | |
| 916 comb | |
| 917 ldb #E$BPAddr | |
| 918 rts | |
| 919 L064E exg a,b | |
| 920 ldx <D.FMBM | |
| 921 bra L06AD | |
| 922 | |
| 923 FAllBit ldd R$D,u | |
| 924 leau R$X,u | |
| 925 pulu y,x | |
| 926 L065A pshs y,x,b,a | |
| 927 bsr L0690 | |
| 928 tsta | |
| 929 pshs a | |
| 930 bmi L0671 | |
| 931 lda ,x | |
| 932 L0665 ora ,s | |
| 933 leay -1,y | |
| 934 beq L0689 | |
| 935 lsr ,s | |
| 936 bcc L0665 | |
| 937 sta ,x+ | |
| 938 L0671 tfr y,d | |
| 939 sta ,s | |
| 940 lda #$FF | |
| 941 bra L067B | |
| 942 L0679 sta ,x+ | |
| 943 L067B subb #$08 | |
| 944 bcc L0679 | |
| 945 dec ,s | |
| 946 bpl L0679 | |
| 947 L0683 lsla | |
| 948 incb | |
| 949 bne L0683 | |
| 950 ora ,x | |
| 951 L0689 sta ,x | |
| 952 clra | |
| 953 leas 1,s | |
| 954 puls pc,y,x,b,a | |
| 955 L0690 pshs b | |
| 956 lsra | |
| 957 rorb | |
| 958 lsra | |
| 959 rorb | |
| 960 lsra | |
| 961 rorb | |
| 962 leax d,x | |
| 963 puls b | |
| 964 lda #$80 | |
| 965 andb #$07 | |
| 966 beq L06A6 | |
| 967 L06A2 lsra | |
| 968 decb | |
| 969 bne L06A2 | |
| 970 L06A6 rts | |
| 971 | |
| 972 FDelBit ldd R$D,u | |
| 973 leau R$X,u | |
| 974 pulu y,x | |
| 975 L06AD pshs y,x,b,a | |
| 976 bsr L0690 | |
| 977 coma | |
| 978 pshs a | |
| 979 bpl L06C4 | |
| 980 lda ,x | |
| 981 L06B8 anda ,s | |
| 982 leay -1,y | |
| 983 beq L06D8 | |
| 984 asr ,s | |
| 985 bcs L06B8 | |
| 986 sta ,x+ | |
| 987 L06C4 tfr y,d | |
| 988 bra L06CA | |
| 989 L06C8 clr ,x+ | |
| 990 L06CA subd #$0008 | |
| 991 bhi L06C8 | |
| 992 beq L06D8 | |
| 993 L06D1 lsla | |
| 994 incb | |
| 995 bne L06D1 | |
| 996 coma | |
| 997 anda ,x | |
| 998 L06D8 sta ,x | |
| 999 clr ,s+ | |
| 1000 puls pc,y,x,b,a | |
| 1001 | |
| 1002 FSchBit pshs u | |
| 1003 ldd R$D,u | |
| 1004 ldx R$X,u | |
| 1005 ldy R$Y,u | |
| 1006 ldu R$U,u | |
| 1007 bsr L06F3 | |
| 1008 puls u | |
| 1009 std R$D,u | |
| 1010 sty R$Y,u | |
| 1011 rts | |
| 1012 L06F3 pshs u,y,x,b,a | |
| 1013 pshs y,b,a | |
| 1014 clr 8,s | |
| 1015 clr 9,s | |
| 1016 tfr d,y | |
| 1017 bsr L0690 | |
| 1018 pshs a | |
| 1019 bra L0710 | |
| 1020 L0703 leay $01,y | |
| 1021 sty $05,s | |
| 1022 L0708 lsr ,s | |
| 1023 bcc L0714 | |
| 1024 ror ,s | |
| 1025 leax $01,x | |
| 1026 L0710 cmpx $0B,s | |
| 1027 bcc L0732 | |
| 1028 L0714 lda ,x | |
| 1029 anda ,s | |
| 1030 bne L0703 | |
| 1031 leay $01,y | |
| 1032 tfr y,d | |
| 1033 subd $05,s | |
| 1034 cmpd $03,s | |
| 1035 bcc L0739 | |
| 1036 cmpd $09,s | |
| 1037 bls L0708 | |
| 1038 std $09,s | |
| 1039 ldd $05,s | |
| 1040 std $01,s | |
| 1041 bra L0708 | |
| 1042 L0732 ldd $01,s | |
| 1043 std $05,s | |
| 1044 coma | |
| 1045 bra L073B | |
| 1046 L0739 std $09,s | |
| 1047 L073B leas $05,s | |
| 1048 puls pc,u,y,x,b,a | |
| 1049 | |
| 1050 FPrsNam ldx R$X,u | |
| 1051 bsr L074D | |
| 1052 std R$D,u | |
| 1053 bcs L0749 | |
| 1054 stx R$X,u | |
| 1055 L0749 sty R$Y,u | |
| 1056 rts | |
| 1057 L074D lda ,x | |
| 1058 cmpa #PDELIM pathlist char? | |
| 1059 bne L0755 branch if not | |
| 1060 leax 1,x go past pathlist char | |
| 1061 L0755 leay ,x | |
| 1062 clrb | |
| 1063 lda ,y+ | |
| 1064 anda #$7F | |
| 1065 bsr L0792 | |
| 1066 bcs L0772 | |
| 1067 L0760 incb | |
| 1068 lda -1,y | |
| 1069 bmi L076F hi bit set on this char, done | |
| 1070 lda ,y+ | |
| 1071 anda #$7F | |
| 1072 bsr IllChar | |
| 1073 bcc L0760 | |
| 1074 lda ,-y | |
| 1075 L076F andcc #^Carry | |
| 1076 rts | |
| 1077 L0772 cmpa #C$COMA comma? | |
| 1078 bne L0778 | |
| 1079 L0776 lda ,y+ | |
| 1080 L0778 cmpa #C$SPAC space? | |
| 1081 beq L0776 | |
| 1082 lda ,-y | |
| 1083 comb | |
| 1084 ldb #E$BNam | |
| 1085 rts | |
| 1086 | |
| 1087 * check for illegal characters in a pathlist | |
| 1088 IllChar cmpa #C$PERD period? | |
| 1089 beq L07C9 branch if so | |
| 1090 cmpa #'0 zero? | |
| 1091 bcs L07A2 branch if less than | |
| 1092 cmpa #'9 number? | |
| 1093 bls L07C9 branch if lower/same | |
| 1094 cmpa #'_ underscore? | |
| 1095 beq L07C9 branch if so | |
| 1096 L0792 cmpa #'A A? | |
| 1097 bcs L07A2 branch if less than | |
| 1098 cmpa #'Z Z? | |
| 1099 bls L07C9 branch if less or equal | |
| 1100 cmpa #'a a? | |
| 1101 bcs L07A2 branch if lower | |
| 1102 cmpa #'z z? | |
| 1103 bls L07C9 branch if less or equal | |
| 1104 L07A2 orcc #Carry | |
| 1105 rts | |
| 1106 | |
| 1107 FCmpNam ldb R$B,u | |
| 1108 leau R$X,u | |
| 1109 pulu y,x | |
| 1110 L07AB pshs y,x,b,a | |
| 1111 L07AD lda ,y+ | |
| 1112 bmi L07BE | |
| 1113 decb | |
| 1114 beq L07BA | |
| 1115 eora ,x+ | |
| 1116 anda #$DF | |
| 1117 beq L07AD | |
| 1118 L07BA orcc #Carry | |
| 1119 puls pc,y,x,b,a | |
| 1120 L07BE decb | |
| 1121 bne L07BA | |
| 1122 eora ,x | |
| 1123 anda #$5F | |
| 1124 bne L07BA | |
| 1125 puls y,x,b,a | |
| 1126 L07C9 andcc #^Carry | |
| 1127 rts | |
| 1128 | |
| 1129 FSSvc ldy R$Y,u | |
| 1130 bra InstSSvc | |
| 1131 SSvcLoop tfr b,a put syscall code in A | |
| 1132 anda #$7F kill hi bit | |
| 1133 cmpa #$7F is code $7F? | |
| 1134 beq SSvcOK | |
|
977
dd89c62ea2ca
os9.asm and oscode.asm now use BTStart symbolic from systype
boisy
parents:
308
diff
changeset
|
1135 cmpa #$37 compare against highest call allowed |
|
dd89c62ea2ca
os9.asm and oscode.asm now use BTStart symbolic from systype
boisy
parents:
308
diff
changeset
|
1136 bcs SSvcOK branch if A less than highest call |
| 0 | 1137 comb |
| 1138 ldb #E$ISWI | |
| 1139 rts | |
| 1140 SSvcOK lslb | |
| 1141 ldu <D.SysDis | |
| 1142 leau b,u U points to entry in table | |
| 1143 ldd ,y++ get addr of func | |
| 1144 leax d,y get absolute addr | |
| 1145 stx ,u store in system table | |
| 1146 bcs InstSSvc branch if system only | |
| 1147 stx <$70,u else store in user table too | |
| 1148 InstSSvc ldb ,y+ get system call code in B | |
| 1149 cmpb #$80 end of table? | |
| 1150 bne SSvcLoop branch if not | |
| 1151 rts | |
| 1152 | |
| 1153 emod | |
| 1154 eom equ * | |
| 1155 | |
| 165 | 1156 fdb Clock |
| 247 | 1157 Vectors fdb SWI3 SWI3 |
| 1158 fdb SWI2 SWI2 | |
| 1159 fdb DUMMY FIRQ | |
| 1160 fdb SVCIRQ IRQ | |
| 1161 fdb SWI SWI | |
| 1162 fdb DUMMY NMI | |
| 0 | 1163 |
| 1164 end | |
| 1165 |