Mercurial > hg > Members > kono > nitros9-code
annotate level1/modules/kernel.asm @ 1587:5f18094d961d
kernel modules renamed to krn, updated makefiles, clock2_tc3 now clock2_cloud9...
| author | boisy |
|---|---|
| date | Mon, 24 May 2004 14:51:21 +0000 |
| parents | 32b27b6792b6 |
| children |
| rev | line source |
|---|---|
| 0 | 1 ******************************************************************** |
| 1368 | 2 * Kernel - NitrOS-9 Level 1 Kernel |
| 0 | 3 * |
| 4 * $Id$ | |
| 5 * | |
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6 * This is how the memory map looks after the kernel has initialized: |
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7 * |
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8 * $0000----> ================================== |
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9 * | | |
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10 * | | |
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11 * $0020-$0111 | System Globals (D.FMBM-D.XNMI) | |
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12 * | | |
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13 * | | |
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14 * $0200---->|==================================| |
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15 * | Free Memory Bitmap | |
| 1383 | 16 * $0200-$021F | (1 bit = 256 byte page) | |
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17 * |----------------------------------| |
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18 * | System Dispatch Table | |
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19 * $0222-$0291 | (Room for 56 addresses) | |
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20 * |----------------------------------| |
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21 * $0292-$02FF | User Dispatch Table | |
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22 * | (Room for 56 addresses) | |
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23 * $0300---->|==================================| |
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24 * | | |
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25 * | | |
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26 * $0300-$03FF | Module Directory Entries | |
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27 * | (Room for 64 entries) | |
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28 * | | |
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29 * $0400---->|==================================| |
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30 * | | |
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31 * $0400-$04FF | System Stack | |
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32 * | | |
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33 * $0500---->|==================================| |
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34 * |
| 1287 | 35 * Edt/Rev YYYY/MM/DD Modified by |
| 36 * Comment | |
| 0 | 37 * ------------------------------------------------------------------ |
| 1287 | 38 * 14 1985/??/?? |
| 39 * From Tandy OS-9 Level One VR 02.00.00 | |
| 40 * | |
| 41 * 15 2002/07/21 Boisy G. Pitre | |
| 42 * Module validation consists only of module header parity check. | |
| 43 * CRC check is not done unless D.CRC is set to 1, which is NOT the | |
| 44 * default case. By default, D.CRC is set to 0, thus there is no | |
| 45 * CRC checking. Speeds up module loads quite a bit. The Init module | |
| 46 * has a bit in a compatibility byte that can turn on/off CRC checking | |
| 1444 | 47 * |
| 48 * 15r1 2003/12/09 Boisy G. Pitre | |
| 49 * Kernel no longer scans for modules in I/O space. | |
| 0 | 50 |
| 1368 | 51 nam Kernel |
| 52 ttl NitrOS-9 Level 1 Kernel | |
| 0 | 53 |
| 54 ifp1 | |
| 55 use defsfile | |
| 56 use scfdefs | |
| 57 endc | |
| 58 | |
| 59 tylg set Systm+Objct | |
| 60 atrv set ReEnt+rev | |
| 1444 | 61 rev set $01 |
| 300 | 62 edition set 15 |
| 0 | 63 |
| 64 L0000 mod eom,name,tylg,atrv,OS9Cold,size | |
| 65 | |
| 66 size equ . | |
| 67 | |
| 1368 | 68 name fcs /Kernel/ |
| 0 | 69 fcb edition |
| 70 | |
| 1383 | 71 InitNam fcs /Init/ |
| 0 | 72 |
| 1383 | 73 P2Nam fcs /KernelP2/ |
| 0 | 74 |
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75 VectCode bra SWI3Jmp $0100 |
| 0 | 76 nop |
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77 bra SWI2Jmp $0103 |
| 0 | 78 nop |
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1197
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79 bra SWIJmp $0106 |
| 0 | 80 nop |
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1197
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parents:
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81 bra NMIJmp $0109 |
| 0 | 82 nop |
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1197
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boisy
parents:
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83 bra IRQJmp $010C |
| 0 | 84 nop |
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1197
607fcc81c5ae
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boisy
parents:
977
diff
changeset
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85 bra FIRQJmp $010F |
| 0 | 86 |
| 87 SWI3Jmp jmp [>D.SWI3] | |
| 88 SWI2Jmp jmp [>D.SWI2] | |
| 89 SWIJmp jmp [>D.SWI] | |
| 90 NMIJmp jmp [>D.NMI] | |
| 91 IRQJmp jmp [>D.IRQ] | |
| 92 FIRQJmp jmp [>D.FIRQ] | |
| 93 VectCSz equ *-VectCode | |
| 94 | |
| 95 | |
| 96 SysTbl fcb F$Link | |
| 97 fdb FLink-*-2 | |
| 98 | |
| 99 fcb F$Fork | |
| 100 fdb FFork-*-2 | |
| 101 | |
| 102 fcb F$Chain | |
| 103 fdb FChain-*-2 | |
| 104 | |
| 105 fcb F$Chain+$80 | |
| 106 fdb SFChain-*-2 | |
| 107 | |
| 108 fcb F$PrsNam | |
| 109 fdb FPrsNam-*-2 | |
| 110 | |
| 111 fcb F$CmpNam | |
| 112 fdb FCmpNam-*-2 | |
| 113 | |
| 114 fcb F$SchBit | |
| 115 fdb FSchBit-*-2 | |
| 116 | |
| 117 fcb F$AllBit | |
| 118 fdb FAllBit-*-2 | |
| 119 | |
| 120 fcb F$DelBit | |
| 121 fdb FDelBit-*-2 | |
| 122 | |
| 123 fcb F$CRC | |
| 124 fdb FCRC-*-2 | |
| 125 | |
| 126 fcb F$SRqMem+$80 | |
| 127 fdb FSRqMem-*-2 | |
| 128 | |
| 129 fcb F$SRtMem+$80 | |
| 130 fdb FSRtMem-*-2 | |
| 131 | |
| 132 fcb F$AProc+$80 | |
| 133 fdb FAProc-*-2 | |
| 134 | |
| 135 fcb F$NProc+$80 | |
| 136 fdb FNProc-*-2 | |
| 137 | |
| 138 fcb F$VModul+$80 | |
| 139 fdb FVModul-*-2 | |
| 140 | |
| 141 fcb F$SSvc | |
| 142 fdb FSSvc-*-2 | |
| 143 | |
| 144 fcb $80 | |
| 145 | |
| 146 * | |
| 147 * OS-9 Genesis! | |
| 148 OS9Cold equ * | |
| 149 * clear out system globals from $0020-$0400 | |
| 150 ldx #D.FMBM | |
| 151 ldy #$400-D.FMBM | |
| 152 clra | |
| 153 clrb | |
| 154 L007F std ,x++ | |
| 155 leay -2,y | |
| 156 bne L007F | |
| 157 * set up system globals | |
| 158 inca | |
| 159 inca D = $200 | |
| 160 std <D.FMBM $200 = start of free memory bitmap | |
| 161 addb #$20 | |
| 162 std <D.FMBM+2 $220 = end of free memory bitmap | |
| 163 addb #$02 | |
| 164 std <D.SysDis $222 = addr of sys dispatch tbl | |
| 165 addb #$70 | |
| 296 | 166 std <D.UsrDis $292 = addr of usr dispatch tbl |
| 0 | 167 clrb |
| 168 inca D = $300 | |
| 169 std <D.ModDir $300 = mod dir start | |
| 170 stx <D.ModDir+2 X = $400 = mod dir end | |
| 171 leas >$0100,x S = $500 (system stack?) | |
| 172 | |
| 173 * Check for valid RAM starting at $400 | |
| 174 ChkRAM leay ,x | |
| 175 ldd ,y store org contents in D | |
| 176 ldx #$00FF | |
| 177 stx ,y write pattern to ,Y | |
| 178 cmpx ,y same as what we wrote? | |
| 179 bne L00C2 nope, not RAM here! | |
| 180 ldx #$FF00 try different pattern | |
| 181 stx ,y write it to ,Y | |
| 182 cmpx ,y same as what we wrote? | |
| 183 bne L00C2 nope, not RAM here! | |
| 184 std ,y else restore org contents | |
| 185 leax >$0100,y check top of next 256 block | |
| 1298 | 186 cmpx #Bt.Start stop short of boot track mem |
| 0 | 187 bcs ChkRAM |
| 188 leay ,x | |
| 189 * Here, Y = end of RAM | |
| 190 L00C2 leax ,y X = end of RAM | |
| 191 stx <D.MLIM save off memory limit | |
| 192 | |
| 193 * Copy vector code over to address $100 | |
| 194 pshs y,x | |
| 195 leax >VectCode,pcr | |
| 247 | 196 ldy #D.XSWI3 |
| 0 | 197 ldb #VectCSz |
| 198 L00D2 lda ,x+ | |
| 199 sta ,y+ | |
| 200 decb | |
| 201 bne L00D2 | |
| 202 puls y,x | |
| 203 * validate modules at top of RAM (kernel, etc.) | |
| 204 L00DB lbsr ValMod | |
| 205 bcs L00E6 | |
| 206 ldd M$Size,x | |
| 207 leax d,x go past module | |
| 208 bra L00EC | |
| 209 L00E6 cmpb #E$KwnMod | |
| 210 beq L00EE | |
| 211 leax 1,x | |
| 1444 | 212 * Modification to stop scan into I/O space |
| 213 L00EC cmpx #Bt.Start+Bt.Size | |
| 214 bcs L00DB | |
| 0 | 215 |
| 216 * copy vectors to system globals | |
| 217 L00EE leay >Vectors,pcr | |
| 218 leax >L0000,pcr | |
| 219 pshs x | |
| 220 ldx #D.SWI3 | |
| 221 L00FB ldd ,y++ | |
| 222 addd ,s | |
| 223 std ,x++ | |
| 224 cmpx #$0036 | |
| 225 bls L00FB | |
| 226 leas 2,s restore stack | |
| 227 | |
| 228 * fill in more system globals | |
| 229 leax >URtoSs,pcr | |
| 230 stx <D.URtoSs | |
| 231 leax >UsrIRQ,pcr | |
| 232 stx <D.UsrIRQ | |
| 233 leax >UsrSvc,pcr | |
| 234 stx <D.UsrSvc | |
| 235 leax >SysIRQ,pcr | |
| 236 stx <D.SysIRQ | |
| 237 stx <D.SvcIRQ | |
| 238 leax >SysSvc,pcr | |
| 239 stx <D.SysSvc | |
| 240 stx <D.SWI2 | |
| 241 leax >Poll,pcr | |
| 242 stx <D.Poll | |
| 243 leax >Clock,pcr | |
| 244 stx <D.Clock | |
| 245 stx <D.AltIRQ | |
| 246 | |
| 247 * install system calls | |
| 248 leay >SysTbl,pcr | |
| 249 lbsr InstSSvc | |
| 250 | |
| 251 * link to init module | |
| 252 lda #Systm+0 | |
| 253 leax >InitNam,pcr | |
| 254 os9 F$Link | |
| 255 lbcs OS9Cold | |
| 256 stu <D.Init | |
| 308 | 257 lda Feature1,u get feature byte 1 |
| 306 | 258 bita #CRCOn CRC on? |
| 259 beq GetMem branch if not (already cleared earlier) | |
| 260 inc <D.CRC else turn on CRC checking | |
| 261 GetMem ldd MaxMem+1,u | |
| 0 | 262 clrb |
| 263 cmpd <D.MLIM | |
| 264 bcc L0158 | |
| 265 std <D.MLIM | |
| 266 L0158 ldx <D.FMBM | |
| 267 ldb #$F8 | |
| 268 stb ,x | |
| 269 clra | |
| 270 ldb <D.MLIM | |
| 271 negb | |
| 272 tfr d,y | |
| 273 negb | |
| 274 lbsr L065A | |
| 275 | |
| 276 * jump into OS9p2 here | |
| 277 leax >P2Nam,pcr | |
| 278 lda #Systm+Objct | |
| 279 os9 F$Link | |
| 280 lbcs OS9Cold | |
| 281 jmp ,y | |
| 165 | 282 SWI3 pshs pc,x,b |
| 0 | 283 ldb #P$SWI3 |
| 284 bra L018C | |
| 165 | 285 SWI2 pshs pc,x,b |
| 0 | 286 ldb #P$SWI2 |
| 287 bra L018C | |
| 247 | 288 DUMMY rti |
| 165 | 289 SVCIRQ jmp [>D.SvcIRQ] |
| 290 SWI pshs pc,x,b | |
| 0 | 291 ldb #P$SWI |
| 292 L018C ldx >D.Proc | |
| 293 ldx b,x get SWI entry | |
| 294 stx 3,s put in PC on stack | |
| 295 puls pc,x,b | |
| 296 | |
| 297 UsrIRQ leay <L01B1,pcr | |
| 298 * transition from user to system state | |
| 299 URtoSs clra | |
| 300 tfr a,dp clear direct page | |
| 301 ldx <D.Proc | |
| 302 ldd <D.SysSvc | |
| 303 std <D.SWI2 | |
| 304 ldd <D.SysIRQ | |
| 305 std <D.SvcIRQ | |
| 306 leau ,s | |
| 307 stu P$SP,x | |
| 308 lda P$State,x | |
| 309 ora #SysState | |
| 310 sta P$State,x | |
| 311 jmp ,y | |
| 312 | |
| 313 L01B1 jsr [>D.Poll] | |
| 314 bcc L01BD | |
| 315 ldb ,s | |
| 316 orb #$10 | |
| 317 stb ,s | |
| 318 L01BD lbra L0255 | |
| 319 | |
| 320 SysIRQ clra | |
| 321 tfr a,dp | |
| 322 jsr [>D.Poll] | |
| 323 bcc L01CF | |
| 324 ldb ,s | |
| 325 orb #$10 | |
| 326 stb ,s | |
| 327 L01CF rti | |
| 328 Poll comb | |
| 329 rts | |
| 330 | |
| 331 Clock ldx <D.SProcQ | |
| 332 beq L01FD | |
| 333 lda P$State,x | |
| 334 bita #TimSleep | |
| 335 beq L01FD | |
| 336 ldu P$SP,x | |
| 337 ldd P$SP,u | |
| 338 subd #$0001 | |
| 339 std P$SP,u | |
| 340 bne L01FD | |
| 341 L01E7 ldu P$Queue,x | |
| 342 bsr L021A | |
| 343 leax ,u | |
| 344 beq L01FB | |
| 345 lda P$State,x | |
| 346 bita #TimSleep | |
| 347 beq L01FB | |
| 348 ldu P$SP,x | |
| 349 ldd P$SP,u | |
| 350 beq L01E7 | |
| 351 L01FB stx <D.SProcQ | |
| 352 L01FD dec <D.Slice | |
| 353 bne ClockRTI | |
| 354 lda <D.TSlice | |
| 355 sta <D.Slice | |
| 356 ldx <D.Proc | |
| 357 beq ClockRTI | |
| 358 lda P$State,x | |
| 359 ora #TimOut | |
| 360 sta P$State,x | |
| 361 bpl L0212 branch if not system state | |
| 362 ClockRTI rti | |
| 363 | |
| 364 L0212 leay >L0255,pcr | |
| 365 bra URtoSs | |
| 366 | |
| 367 * X = proc desc | |
| 368 FAProc ldx R$X,u | |
| 369 L021A pshs u,y | |
| 370 ldu #$003F | |
| 371 bra L0228 | |
| 372 L0221 ldb P$Age,u | |
| 373 incb | |
| 374 beq L0228 | |
| 375 stb P$Age,u | |
| 376 L0228 ldu P$Queue,u U = proc desc | |
| 377 bne L0221 | |
| 378 ldu #$003F | |
| 379 lda P$Prior,x | |
| 380 sta P$Age,x | |
| 381 orcc #IntMasks | |
| 382 L0235 leay ,u | |
| 383 ldu P$Queue,u | |
| 384 beq L023F | |
| 385 cmpa P$Age,u | |
| 386 bls L0235 | |
| 387 L023F stu P$Queue,x | |
| 388 stx P$Queue,y | |
| 389 clrb | |
| 390 puls pc,u,y | |
| 391 | |
| 392 UsrSvc leay <L024E,pcr | |
| 393 orcc #IntMasks | |
| 394 lbra URtoSs | |
| 395 | |
| 396 L024E andcc #^IntMasks | |
| 397 ldy <D.UsrDis | |
| 398 bsr L0278 | |
| 399 L0255 ldx <D.Proc get current proc desc | |
| 400 beq FNProc branch to FNProc if none | |
| 401 orcc #IntMasks | |
| 402 ldb P$State,x | |
| 403 andb #^SysState | |
| 404 stb P$State,x | |
| 405 bitb #TimOut | |
| 406 beq L02D1 | |
| 407 andb #^TimOut | |
| 408 stb P$State,x | |
| 409 bsr L021A | |
| 410 bra FNProc | |
| 411 | |
| 412 * system call entry | |
| 413 SysSvc clra | |
| 414 tfr a,dp set direct page to 0 | |
| 415 leau ,s | |
| 416 ldy <D.SysDis | |
| 417 bsr L0278 | |
| 418 rti | |
| 419 | |
| 420 L0278 pshs u | |
| 421 ldx R$PC,u point X to PC | |
| 422 ldb ,x+ get func code at X | |
| 423 stx R$PC,u restore updated PC | |
| 424 lslb multiply by 2 | |
| 425 bcc L0288 branch if user call | |
| 426 rorb | |
| 427 ldx -2,y | |
| 428 bra L0290 | |
| 429 L0288 cmpb #$6E | |
| 430 bcc L02A7 | |
| 431 ldx b,y X = addr of system call | |
| 432 beq L02A7 | |
| 433 L0290 jsr ,x jsr into system call | |
| 434 L0292 puls u | |
| 435 tfr cc,a | |
| 436 bcc FixCC branch if no error | |
| 437 stb R$B,u store error code | |
| 438 FixCC ldb R$CC,u get caller's CC | |
| 439 andb #^(Negative+Zero+TwosOvfl+Carry) | |
| 440 stb R$CC,u | |
| 441 anda #Negative+Zero+TwosOvfl+Carry | |
| 442 ora R$CC,u | |
| 443 sta R$CC,u | |
| 444 rts | |
| 445 L02A7 comb | |
| 446 ldb #E$UnkSvc | |
| 447 bra L0292 | |
| 448 | |
| 449 * no signal handler, exit with signal value as exit code | |
| 450 L02AC ldb P$State,x | |
| 451 orb #SysState | |
| 452 stb P$State,x | |
| 453 ldb <P$Signal,x | |
| 454 andcc #^(IntMasks) | |
| 455 os9 F$Exit | |
| 456 | |
| 457 FNProc clra | |
| 458 clrb | |
| 459 std <D.Proc | |
| 460 bra L02C2 | |
| 461 * execution goes here when there are no active processes | |
| 462 L02C0 cwai #^(IntMasks) | |
| 463 L02C2 orcc #IntMasks | |
| 464 ldx <D.AProcQ get next active process | |
| 465 beq L02C0 CWAI if none | |
| 466 ldd P$Queue,x get queue ptr | |
| 467 std <D.AProcQ store in Active Q | |
| 468 stx <D.Proc store in current process | |
| 469 lds P$SP,x get process' stack ptr | |
| 470 L02D1 ldb P$State,x get state | |
| 471 bmi L0308 branch if system state | |
| 472 bitb #Condem process condemned? | |
| 473 bne L02AC branch if so... | |
| 474 ldb <P$Signal,x get signal no | |
| 475 beq L02FF branch if none | |
| 476 decb decrement | |
| 477 beq L02FC branch if wake up | |
| 478 ldu <P$SigVec,x get signal handler addr | |
| 479 beq L02AC branch if none | |
| 480 ldy <P$SigDat,x get data addr | |
| 481 ldd $06,s | |
| 482 pshs u,y,b,a | |
| 483 ldu $0A,s | |
| 484 lda <P$Signal,x | |
| 485 ldb $09,s | |
| 486 tfr d,y | |
| 487 ldd $06,s | |
| 488 pshs u,y,b,a | |
| 489 clrb | |
| 490 L02FC stb <P$Signal,x | |
| 491 L02FF ldd <P$SWI2,x | |
| 492 std <D.SWI2 | |
| 493 ldd <D.UsrIRQ | |
| 494 std <D.SvcIRQ | |
| 495 L0308 rti | |
| 496 | |
| 497 FLink pshs u save caller regs | |
| 498 ldd R$A,u | |
| 499 ldx R$X,u | |
| 500 lbsr L0443 | |
| 501 bcc FLinkOK | |
| 502 ldb #E$MNF | |
| 503 bra L033D | |
| 504 * U = module dir entry | |
| 505 FLinkOK ldy ,u get module ptr | |
| 506 ldb M$Revs,y | |
| 507 bitb #ReEnt reentrant? | |
| 508 bne L032A branch if so | |
| 509 tst $02,u link count zero? | |
| 510 beq L032A yep, ok to link to nonreent | |
| 511 comb else module is busy | |
| 512 ldb #E$ModBsy | |
| 513 bra L033D | |
| 514 L032A inc $02,u increment link count | |
| 515 ldu ,s get caller regs from stack | |
| 516 stx R$X,u | |
| 517 sty R$U,u | |
| 518 ldd M$Type,y | |
| 519 std R$D,u | |
| 520 ldd M$IDSize,y | |
| 521 leax d,y | |
| 522 stx R$Y,u | |
| 523 L033D puls pc,u | |
| 524 | |
| 525 FVModul pshs u | |
| 526 ldx R$X,u | |
| 527 bsr ValMod | |
| 528 puls y | |
| 529 stu R$U,y | |
| 530 rts | |
| 531 * X = address of module to validate | |
| 532 ValMod bsr ChkMHCRC | |
| 533 bcs L039A | |
| 534 lda M$Type,x | |
| 535 pshs x,a | |
| 536 ldd M$Name,x | |
| 537 leax d,x X = addr of name in mod | |
| 538 puls a | |
| 539 lbsr L0443 | |
| 540 puls x | |
| 541 bcs L039B | |
| 542 ldb #E$KwnMod | |
| 543 cmpx ,u | |
| 544 beq L03A1 | |
| 545 lda M$Revs,x | |
| 546 anda #RevsMask | |
| 547 pshs a | |
| 548 ldy ,u | |
| 549 lda M$Revs,y | |
| 550 anda #RevsMask | |
| 551 cmpa ,s+ same revision as other mod? | |
| 552 bcc L03A1 | |
| 553 pshs y,x | |
| 554 ldb M$Size,u | |
| 555 bne L0395 | |
| 556 ldx ,u | |
| 557 cmpx <D.BTLO | |
| 558 bcc L0395 | |
| 559 ldd $02,x | |
| 560 addd #$00FF | |
| 561 tfr a,b | |
| 562 clra | |
| 563 tfr d,y | |
| 564 ldb ,u | |
| 565 ldx <D.FMBM | |
| 566 os9 F$DelBit | |
| 567 clr $02,u | |
| 568 L0395 puls y,x | |
| 569 L0397 stx ,u | |
| 570 clrb | |
| 571 L039A rts | |
| 572 L039B leay ,u | |
| 573 bne L0397 | |
| 574 ldb #E$DirFul | |
| 575 L03A1 coma | |
| 576 rts | |
| 577 | |
| 578 * check module header and CRC | |
| 579 * X = address of potential module | |
| 580 ChkMHCRC ldd ,x | |
| 581 cmpd #M$ID12 sync bytes? | |
| 582 bne L03B1 nope, not a module here | |
| 583 leay M$Parity,x | |
| 584 bsr ChkMHPar check header parity | |
| 585 bcc L03B5 branch if ok | |
| 586 L03B1 comb | |
| 587 ldb #E$BMID | |
| 588 rts | |
|
297
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589 |
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590 L03B5 |
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591 * Following 4 lines added to support no CRC checks - 2002/07/21 |
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592 lda <D.CRC is CRC checking on? |
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eda95fad0c31
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593 bne DoCRCCk branch if so |
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594 clrb |
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595 rts |
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596 |
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|
597 DoCRCCk pshs x |
| 0 | 598 ldy M$Size,x |
| 599 bsr ChkMCRC checkm module CRC | |
| 600 puls pc,x | |
| 601 * check module header parity | |
| 602 * Y = pointer to parity byte | |
| 603 ChkMHPar pshs y,x | |
| 604 clra | |
| 605 ChkM010 eora ,x+ | |
| 606 cmpx 2,s compare to addr of M$Parity | |
| 607 bls ChkM010 | |
| 608 cmpa #$FF | |
| 609 puls pc,y,x | |
| 610 * X = address of potential module | |
| 611 * Y = size of module | |
| 612 ChkMCRC ldd #$FFFF | |
| 613 pshs b,a | |
| 614 pshs b,a | |
| 615 leau 1,s | |
| 616 L03D4 lda ,x+ | |
| 617 bsr CRCAlgo | |
| 618 leay -1,y dec Y (size of module) | |
| 619 bne L03D4 continue | |
| 620 clr -1,u | |
| 621 lda ,u | |
| 622 cmpa #CRCCon1 | |
| 623 bne L03EC | |
| 624 ldd 1,u | |
| 625 cmpd #CRCCon23 | |
| 626 beq L03EF | |
| 627 L03EC comb | |
| 628 ldb #E$BMCRC | |
| 629 L03EF puls pc,y,x | |
| 630 | |
| 631 * F$CRC | |
| 632 FCRC ldx R$X,u | |
| 633 ldy R$Y,u | |
| 634 beq L0402 | |
| 635 ldu R$U,u | |
| 636 L03FA lda ,x+ | |
| 637 bsr CRCAlgo | |
| 638 leay -1,y | |
| 639 bne L03FA | |
| 640 L0402 clrb | |
| 641 rts | |
| 642 | |
| 643 CRCAlgo eora ,u | |
| 644 pshs a | |
| 645 ldd $01,u | |
| 646 std ,u | |
| 647 clra | |
| 648 ldb ,s | |
| 649 lslb | |
| 650 rola | |
| 651 eora 1,u | |
| 652 std 1,u | |
| 653 clrb | |
| 654 lda ,s | |
| 655 lsra | |
| 656 rorb | |
| 657 lsra | |
| 658 rorb | |
| 659 eora 1,u | |
| 660 eorb 2,u | |
| 661 std 1,u | |
| 662 lda ,s | |
| 663 lsla | |
| 664 eora ,s | |
| 665 sta ,s | |
| 666 lsla | |
| 667 lsla | |
| 668 eora ,s | |
| 669 sta ,s | |
| 670 lsla | |
| 671 lsla | |
| 672 lsla | |
| 673 lsla | |
| 674 eora ,s+ | |
| 675 bpl L0442 | |
| 676 ldd #$8021 | |
| 677 eora ,u | |
| 678 sta ,u | |
| 679 eorb 2,u | |
| 680 stb 2,u | |
| 681 L0442 rts | |
| 682 | |
| 683 L0443 ldu #$0000 | |
| 684 tfr a,b | |
| 685 anda #TypeMask | |
| 686 andb #LangMask | |
| 687 pshs u,y,x,b,a | |
| 688 bsr EatSpace | |
| 689 cmpa #PDELIM pathlist char? | |
| 690 beq L049C branch if so | |
| 1452 | 691 * lbsr L074D parse name |
| 692 lbsr ParseNam parse name | |
| 0 | 693 bcs L049D return if error |
| 694 ldu <D.ModDir | |
| 695 L045B pshs u,y,b | |
| 696 ldu ,u | |
| 697 beq L048B | |
| 698 ldd $04,u | |
| 699 leay d,u | |
| 700 ldb ,s | |
| 701 lbsr L07AB | |
| 702 bcs L0493 | |
| 703 lda $05,s | |
| 704 beq L0476 | |
| 705 eora $06,u | |
| 706 anda #$F0 | |
| 707 bne L0493 | |
| 708 L0476 lda $06,s | |
| 709 beq L0480 | |
| 710 eora $06,u | |
| 711 anda #$0F | |
| 712 bne L0493 | |
| 713 L0480 puls u,x,b | |
| 714 stu $06,s | |
| 715 bsr EatSpace | |
| 716 stx $02,s | |
| 717 clra | |
| 718 bra L049D | |
| 719 L048B ldd $0B,s | |
| 720 bne L0493 | |
| 721 ldd $03,s | |
| 722 std $0B,s | |
| 723 L0493 puls u,y,b | |
| 724 leau $04,u | |
| 725 cmpu <D.ModDir+2 | |
| 726 bcs L045B | |
| 727 L049C comb | |
| 728 L049D puls pc,u,y,x,b,a | |
| 729 | |
| 730 EatSpace lda #C$SPAC | |
| 731 EatSpc10 cmpa ,x+ | |
| 732 beq EatSpc10 | |
| 733 lda ,-x | |
| 734 rts | |
| 735 | |
| 736 FFork ldx <D.PrcDBT | |
| 737 os9 F$All64 | |
| 738 bcs L0517 | |
| 739 ldx <D.Proc | |
| 740 pshs x save calling proc desc on stack | |
| 741 ldd P$User,x | |
| 742 std P$User,y | |
| 743 lda P$Prior,x | |
| 744 clrb | |
| 745 std P$Prior,y | |
| 746 ldb #SysState | |
| 747 stb P$State,y | |
| 748 sty <D.Proc | |
| 749 ldd <P$NIO,x | |
| 750 std <P$NIO,y | |
| 751 ldd <P$NIO+2,x | |
| 752 std <P$NIO+2,y | |
| 753 leax <P$DIO,x | |
| 754 leay <P$DIO,y | |
| 755 ldb #DefIOSiz | |
| 756 * copy I/O stuff from parent to child | |
| 757 L04D7 lda ,x+ | |
| 758 sta ,y+ | |
| 759 decb | |
| 760 bne L04D7 | |
| 761 * X/Y = address of path table in respective proc desc | |
| 762 * Dup stdin/stdout/stderr | |
| 763 ldb #$03 | |
| 764 L04E0 lda ,x+ | |
| 765 os9 I$Dup | |
| 766 bcc L04E8 | |
| 767 clra | |
| 768 L04E8 sta ,y+ | |
| 769 decb | |
| 770 bne L04E0 | |
| 771 bsr L0553 | |
| 772 bcs L050C | |
| 773 puls y get parent proc desc | |
| 774 sty <D.Proc | |
| 775 lda P$ID,x get ID of new process | |
| 776 sta R$A,u store in caller's A | |
| 777 ldb P$CID,y get child id of parent | |
| 778 sta P$CID,y store new proc in parent's CID | |
| 779 lda P$ID,y get ID of parent | |
| 780 std P$PID,x store in child proc desc | |
| 781 ldb P$State,x update state of child | |
| 782 andb #^SysState | |
| 783 stb P$State,x | |
| 784 os9 F$AProc insert child in active Q | |
| 785 rts | |
| 786 L050C pshs b | |
| 787 os9 F$Exit | |
| 788 comb | |
| 789 puls x,b | |
| 790 stx <D.Proc | |
| 791 rts | |
| 792 L0517 comb | |
| 793 ldb #E$PrcFul | |
| 794 rts | |
| 795 | |
| 796 FChain bsr L0543 | |
| 797 bcs L0531 | |
| 798 orcc #IntMasks | |
| 799 ldb $0D,x | |
| 800 andb #$7F | |
| 801 stb $0D,x | |
| 802 L0527 os9 F$AProc | |
| 803 os9 F$NProc | |
| 804 | |
| 805 SFChain bsr L0543 | |
| 806 bcc L0527 | |
| 807 L0531 pshs b | |
| 808 stb <P$Signal,x | |
| 809 ldb P$State,x | |
| 810 orb #Condem | |
| 811 stb P$State,x | |
| 812 ldb #$FF | |
| 813 stb P$Prior,x | |
| 814 comb | |
| 815 puls pc,b | |
| 816 L0543 pshs u | |
| 817 ldx <D.Proc | |
| 818 ldu <P$PModul,x | |
| 819 os9 F$UnLink | |
| 820 ldu ,s | |
| 821 bsr L0553 | |
| 822 puls pc,u | |
| 823 L0553 ldx <D.Proc | |
| 824 pshs u,x | |
| 825 ldd <D.UsrSvc | |
| 826 std <P$SWI,x | |
| 827 std <P$SWI2,x | |
| 828 std <P$SWI3,x | |
| 829 clra | |
| 830 clrb | |
| 831 sta <P$Signal,x | |
| 832 std <P$SigVec,x | |
| 833 lda R$A,u | |
| 834 ldx R$X,u | |
| 835 os9 F$Link | |
| 836 bcc L0578 | |
| 837 os9 F$Load | |
| 838 bcs L05E7 | |
| 839 L0578 ldy <D.Proc | |
| 840 stu <P$PModul,y | |
| 841 cmpa #Prgrm+Objct | |
| 842 beq L058B | |
| 843 cmpa #Systm+Objct | |
| 844 beq L058B | |
| 845 comb | |
| 846 ldb #E$NEMod | |
| 847 bra L05E7 | |
| 848 L058B leay ,u Y = addr of module | |
| 849 ldu 2,s get U off stack (caller regs) | |
| 850 stx R$X,u | |
| 851 lda R$B,u | |
| 852 clrb | |
| 853 cmpd M$Mem,y compare passed mem to module's | |
| 854 bcc L059B branch if less than | |
| 855 ldd M$Mem,y | |
| 856 L059B addd #$0000 | |
| 857 bne L05A0 | |
| 858 L05A0 os9 F$Mem | |
| 859 bcs L05E7 | |
| 860 subd #R$Size subtract registers | |
| 861 subd R$Y,u subtract parameter area | |
| 862 bcs L05E5 | |
| 863 ldx R$U,u get parameter area | |
| 864 ldd R$Y,u get parameter size | |
| 865 pshs b,a | |
| 866 beq L05BE | |
| 867 leax d,x point to end of param area | |
| 868 L05B6 lda ,-x get byte, dec X | |
| 869 sta ,-y save byte in data area, dec X | |
| 870 cmpx R$U,u at top of param area? | |
| 871 bhi L05B6 | |
| 872 * set up registers for return of F$Fork/F$Chain | |
| 873 L05BE ldx <D.Proc | |
| 874 sty -$08,y put in X on caller stack | |
| 875 leay -R$Size,y back up register size | |
| 876 sty P$SP,x | |
| 877 lda P$ADDR,x | |
| 878 clrb | |
| 879 std R$U,y lowest address | |
| 880 sta R$DP,y set direct page | |
| 881 adda P$PagCnt,x | |
| 882 std R$Y,y | |
| 883 puls b,a | |
| 884 std R$D,y size of param area | |
| 885 ldb #Entire | |
| 886 stb R$CC,y | |
| 887 ldu <P$PModul,x get addr of prim. mod | |
| 888 ldd M$Exec,u | |
| 889 leau d,u | |
| 890 stu R$PC,y put in PC on caller reg | |
| 891 clrb | |
| 892 L05E5 ldb #E$IForkP | |
| 893 L05E7 puls pc,u,x | |
| 894 | |
| 895 FSRqMem ldd R$D,u | |
| 896 addd #$00FF | |
| 897 clrb | |
| 898 std R$D,u | |
| 899 ldx <D.FMBM+2 | |
| 900 ldd #$01FF | |
| 901 pshs b,a | |
| 902 bra L0604 | |
| 903 L05FA dec $01,s | |
| 904 ldb $01,s | |
| 905 L05FE lsl ,s | |
| 906 bcc L060A | |
| 907 rol ,s | |
| 908 L0604 leax -1,x | |
| 909 cmpx <D.FMBM | |
| 910 bcs L0620 | |
| 911 L060A lda ,x | |
| 912 anda ,s | |
| 913 bne L05FA | |
| 914 dec 1,s | |
| 915 subb 1,s | |
| 916 cmpb 1,u | |
| 917 rora | |
| 918 addb 1,s | |
| 919 rola | |
| 920 bcs L05FE | |
| 921 ldb 1,s | |
| 922 clra | |
| 923 incb | |
| 924 L0620 leas 2,s | |
| 925 bcs L0635 | |
| 926 ldx <D.FMBM | |
| 927 tfr d,y | |
| 928 ldb 1,u | |
| 929 clra | |
| 930 exg d,y | |
| 931 bsr L065A | |
| 932 exg a,b | |
| 933 std 8,u | |
| 934 L0633 clra | |
| 935 rts | |
| 936 L0635 comb | |
| 937 ldb #E$MemFul | |
| 938 rts | |
| 939 | |
| 940 FSRtMem ldd R$D,u | |
| 941 addd #$00FF | |
| 942 tfr a,b | |
| 943 clra | |
| 944 tfr d,y | |
| 945 ldd R$U,u | |
| 946 beq L0633 | |
| 947 tstb | |
| 948 beq L064E | |
| 949 comb | |
| 950 ldb #E$BPAddr | |
| 951 rts | |
| 952 L064E exg a,b | |
| 953 ldx <D.FMBM | |
| 954 bra L06AD | |
| 955 | |
| 956 FAllBit ldd R$D,u | |
| 957 leau R$X,u | |
| 958 pulu y,x | |
| 959 L065A pshs y,x,b,a | |
| 960 bsr L0690 | |
| 961 tsta | |
| 962 pshs a | |
| 963 bmi L0671 | |
| 964 lda ,x | |
| 965 L0665 ora ,s | |
| 966 leay -1,y | |
| 967 beq L0689 | |
| 968 lsr ,s | |
| 969 bcc L0665 | |
| 970 sta ,x+ | |
| 971 L0671 tfr y,d | |
| 972 sta ,s | |
| 973 lda #$FF | |
| 974 bra L067B | |
| 975 L0679 sta ,x+ | |
| 976 L067B subb #$08 | |
| 977 bcc L0679 | |
| 978 dec ,s | |
| 979 bpl L0679 | |
| 980 L0683 lsla | |
| 981 incb | |
| 982 bne L0683 | |
| 983 ora ,x | |
| 984 L0689 sta ,x | |
| 985 clra | |
| 986 leas 1,s | |
| 987 puls pc,y,x,b,a | |
| 988 L0690 pshs b | |
| 989 lsra | |
| 990 rorb | |
| 991 lsra | |
| 992 rorb | |
| 993 lsra | |
| 994 rorb | |
| 995 leax d,x | |
| 996 puls b | |
| 997 lda #$80 | |
| 998 andb #$07 | |
| 999 beq L06A6 | |
| 1000 L06A2 lsra | |
| 1001 decb | |
| 1002 bne L06A2 | |
| 1003 L06A6 rts | |
| 1004 | |
| 1005 FDelBit ldd R$D,u | |
| 1006 leau R$X,u | |
| 1007 pulu y,x | |
| 1008 L06AD pshs y,x,b,a | |
| 1009 bsr L0690 | |
| 1010 coma | |
| 1011 pshs a | |
| 1012 bpl L06C4 | |
| 1013 lda ,x | |
| 1014 L06B8 anda ,s | |
| 1015 leay -1,y | |
| 1016 beq L06D8 | |
| 1017 asr ,s | |
| 1018 bcs L06B8 | |
| 1019 sta ,x+ | |
| 1020 L06C4 tfr y,d | |
| 1021 bra L06CA | |
| 1022 L06C8 clr ,x+ | |
| 1023 L06CA subd #$0008 | |
| 1024 bhi L06C8 | |
| 1025 beq L06D8 | |
| 1026 L06D1 lsla | |
| 1027 incb | |
| 1028 bne L06D1 | |
| 1029 coma | |
| 1030 anda ,x | |
| 1031 L06D8 sta ,x | |
| 1032 clr ,s+ | |
| 1033 puls pc,y,x,b,a | |
| 1034 | |
| 1035 FSchBit pshs u | |
| 1036 ldd R$D,u | |
| 1037 ldx R$X,u | |
| 1038 ldy R$Y,u | |
| 1039 ldu R$U,u | |
| 1040 bsr L06F3 | |
| 1041 puls u | |
| 1042 std R$D,u | |
| 1043 sty R$Y,u | |
| 1044 rts | |
| 1045 L06F3 pshs u,y,x,b,a | |
| 1046 pshs y,b,a | |
| 1047 clr 8,s | |
| 1048 clr 9,s | |
| 1049 tfr d,y | |
| 1050 bsr L0690 | |
| 1051 pshs a | |
| 1052 bra L0710 | |
| 1053 L0703 leay $01,y | |
| 1054 sty $05,s | |
| 1055 L0708 lsr ,s | |
| 1056 bcc L0714 | |
| 1057 ror ,s | |
| 1058 leax $01,x | |
| 1059 L0710 cmpx $0B,s | |
| 1060 bcc L0732 | |
| 1061 L0714 lda ,x | |
| 1062 anda ,s | |
| 1063 bne L0703 | |
| 1064 leay $01,y | |
| 1065 tfr y,d | |
| 1066 subd $05,s | |
| 1067 cmpd $03,s | |
| 1068 bcc L0739 | |
| 1069 cmpd $09,s | |
| 1070 bls L0708 | |
| 1071 std $09,s | |
| 1072 ldd $05,s | |
| 1073 std $01,s | |
| 1074 bra L0708 | |
| 1075 L0732 ldd $01,s | |
| 1076 std $05,s | |
| 1077 coma | |
| 1078 bra L073B | |
| 1079 L0739 std $09,s | |
| 1080 L073B leas $05,s | |
| 1081 puls pc,u,y,x,b,a | |
| 1082 | |
| 1452 | 1083 |
| 1084 use krnl/fprsnam.asm | |
| 1085 *FPrsNam ldx R$X,u | |
| 1086 * bsr L074D | |
| 1087 * std R$D,u | |
| 1088 * bcs L0749 | |
| 1089 * stx R$X,u | |
| 1090 *L0749 sty R$Y,u | |
| 1091 * rts | |
| 1092 *L074D lda ,x | |
| 1093 * cmpa #PDELIM pathlist char? | |
| 1094 * bne L0755 branch if not | |
| 1095 * leax 1,x go past pathlist char | |
| 1096 *L0755 leay ,x | |
| 1097 * clrb | |
| 1098 * lda ,y+ | |
| 1099 * anda #$7F | |
| 1100 * bsr L0792 | |
| 1101 * bcs L0772 | |
| 1102 *L0760 incb | |
| 1103 * lda -1,y | |
| 1104 * bmi L076F hi bit set on this char, done | |
| 1105 * lda ,y+ | |
| 1106 * anda #$7F | |
| 1107 * bsr IllChar | |
| 1108 * bcc L0760 | |
| 1109 * lda ,-y | |
| 1110 *L076F andcc #^Carry | |
| 1111 * rts | |
| 1112 *L0772 cmpa #C$COMA comma? | |
| 1113 * bne L0778 | |
| 1114 *L0776 lda ,y+ | |
| 1115 *L0778 cmpa #C$SPAC space? | |
| 1116 * beq L0776 | |
| 1117 * lda ,-y | |
| 1118 * comb | |
| 1119 * ldb #E$BNam | |
| 1120 * rts | |
| 0 | 1121 |
| 1122 * check for illegal characters in a pathlist | |
| 1452 | 1123 *IllChar cmpa #C$PERD period? |
| 1124 * beq L07C9 branch if so | |
| 1125 * cmpa #'0 zero? | |
| 1126 * bcs L07A2 branch if less than | |
| 1127 * cmpa #'9 number? | |
| 1128 * bls L07C9 branch if lower/same | |
| 1129 * cmpa #'_ underscore? | |
| 1130 * beq L07C9 branch if so | |
| 1131 *L0792 cmpa #'A A? | |
| 1132 * bcs L07A2 branch if less than | |
| 1133 * cmpa #'Z Z? | |
| 1134 * bls L07C9 branch if less or equal | |
| 1135 * cmpa #'a a? | |
| 1136 * bcs L07A2 branch if lower | |
| 1137 * cmpa #'z z? | |
| 1138 * bls L07C9 branch if less or equal | |
| 1139 *L07A2 orcc #Carry | |
| 1140 * rts | |
| 0 | 1141 |
| 1142 FCmpNam ldb R$B,u | |
| 1143 leau R$X,u | |
| 1144 pulu y,x | |
| 1145 L07AB pshs y,x,b,a | |
| 1146 L07AD lda ,y+ | |
| 1147 bmi L07BE | |
| 1148 decb | |
| 1149 beq L07BA | |
| 1150 eora ,x+ | |
| 1151 anda #$DF | |
| 1152 beq L07AD | |
| 1153 L07BA orcc #Carry | |
| 1154 puls pc,y,x,b,a | |
| 1155 L07BE decb | |
| 1156 bne L07BA | |
| 1157 eora ,x | |
| 1158 anda #$5F | |
| 1159 bne L07BA | |
| 1160 puls y,x,b,a | |
| 1161 L07C9 andcc #^Carry | |
| 1162 rts | |
| 1163 | |
| 1164 FSSvc ldy R$Y,u | |
| 1165 bra InstSSvc | |
| 1166 SSvcLoop tfr b,a put syscall code in A | |
| 1167 anda #$7F kill hi bit | |
| 1168 cmpa #$7F is code $7F? | |
| 1169 beq SSvcOK | |
|
977
dd89c62ea2ca
os9.asm and oscode.asm now use BTStart symbolic from systype
boisy
parents:
308
diff
changeset
|
1170 cmpa #$37 compare against highest call allowed |
|
dd89c62ea2ca
os9.asm and oscode.asm now use BTStart symbolic from systype
boisy
parents:
308
diff
changeset
|
1171 bcs SSvcOK branch if A less than highest call |
| 0 | 1172 comb |
| 1173 ldb #E$ISWI | |
| 1174 rts | |
| 1175 SSvcOK lslb | |
| 1176 ldu <D.SysDis | |
| 1177 leau b,u U points to entry in table | |
| 1178 ldd ,y++ get addr of func | |
| 1179 leax d,y get absolute addr | |
| 1180 stx ,u store in system table | |
| 1181 bcs InstSSvc branch if system only | |
| 1182 stx <$70,u else store in user table too | |
| 1183 InstSSvc ldb ,y+ get system call code in B | |
| 1184 cmpb #$80 end of table? | |
| 1185 bne SSvcLoop branch if not | |
| 1186 rts | |
| 1187 | |
| 1188 emod | |
| 1189 eom equ * | |
| 1190 | |
| 165 | 1191 fdb Clock |
| 247 | 1192 Vectors fdb SWI3 SWI3 |
| 1193 fdb SWI2 SWI2 | |
| 1194 fdb DUMMY FIRQ | |
| 1195 fdb SVCIRQ IRQ | |
| 1196 fdb SWI SWI | |
| 1197 fdb DUMMY NMI | |
| 0 | 1198 |
| 1199 end | |
| 1200 |