[Copyright 1999,2002 Frank Durda IV, All Rights Reserved. Mirroring of any material on this page in any form is expressly prohibited. The official web site for this material is: http://nemesis.lonestar.org Contact this address for use clearances: clearance at nemesis.lonestar.org Comments and queries to this address: web_software_2011 at nemesis.lonestar.org]
MISOSYS EDAS-4.3 04/11/99 21:40:12 SYS10 - LS-DOS 6.2 Page 00001
00001 ;SYS10/ASM - LS-DOS 6.2
00003 ;
000D 00004 CR EQU 13
00005 ;
00006 *LIST OFF ;Get SYS0/EQU
00322 *LIST ON
0000 00323 *GET COPYCOM:3 ;Copyright message
00324 ; COPYCOM - File for Copyright COMment block
00325 ;
0000 00326 *GET BUILDVER/ASM:3
00327 ;
00328 ; Buildver/asm is a bit of a kludge since not all utilities can load
00329 ; equates from LDOS60 and still compile. LOWCORE and everybody else
00330 ; relies on this setting, and it eventually ends up in LDOS60/EQU
00331 ; for programs that can use that.
00332 ;
FFFF 00333 @BLD631 EQU -1 ;<631>Build 631 distribution (LEVEL 1B)
00334 ; These switches activate patches made since the 1B release.
00335 ; It is important that all earlier patches be enabled when a higher
00336 ; patch is enabled.
00337 ; Patches C thru F were published in TMQ IV.iv, page 32 (NOTE: the
00338 ; patch addresses listed for SPOOL in SPOOL1/FIX are 19H high.)
FFFF 00339 @BLD631C EQU -1 ;<631>Apply 1C patches (SETKI)
FFFF 00340 @BLD631D EQU -1 ;<631>Apply 1D patches (DIR)
FFFF 00341 @BLD631E EQU -1 ;<631>Apply 1E patches (DIR & MEMDISK/DCT)
FFFF 00342 @BLD631F EQU -1 ;<631>Apply 1F patches (SPOOL)
00343 ; Patches G and H were published in TMQ V.i, pages 10 and 18/19.
FFFF 00344 @BLD631G EQU -1 ;<631>Apply 1G patches (//KEYIN,DIR,DO *)
FFFF 00345 @BLD631H EQU -1 ;<631>Apply 1H patches (MEMORY)
00346 ;
00347 ;End of BUILDVER/ASM
00348 IF @BLD631
00350 ELSE
00351 COM '<*(C) 1982,3,4,6 by LSI*>'
00352 ENDIF
00353 ;
1E00 00354 ORG 1E00H
00355 ;
1E00 E670 00356 SYS10 AND 70H ;Strip bit 7
1E02 C8 00357 RET Z ;Back on zero entry
1E03 FE10 00358 CP 10H ;Remove all for now
1E05 C0 00359 RET NZ ;Ret if any other entry
1E06 1A 00360 LD A,(DE) ;Test device/file
1E07 CB7F 00361 BIT 7,A ;File open or device?
1E09 2860 00362 JR Z,CLOSDCB ;Jump if device
1E0B CD6815 00363 CALL CKOPEN@ ;Test for open file
1E0E DD7E01 00364 LD A,(IX+1) ; & link the FCB to IX
1E11 E607 00365 AND 7 ;Test for remove access
1E13 FE02 00366 CP 2
1E15 3804 00367 JR C,REMOV1 ;Jump if access granted
1E17 3E25 00368 LD A,25H ; else init errcod
1E19 B7 00369 OR A
1E1A C9 00370 RET
1E1B DD4E06 00371 REMOV1 LD C,(IX+6) ;P/u drive #
1E1E DD4607 00372 LD B,(IX+7) ;P/u DEC
1E21 CD7418 00373 CALL @GATRD ;Read GAT => DIRBUF$
1E24 CCBB18 00374 REMOV2 CALL Z,@DIRRD ;Read dir for this DEC
1E27 C0 00375 RET NZ ;Ret if read error
1E28 3E16 00376 LD A,22 ;Point to 1st extent
1E2A 85 00377 ADD A,L
1E2B 6F 00378 LD L,A
1E2C 5E 00379 REMOV3 LD E,(HL) ;P/u relative cylinder
1E2D 2C 00380 INC L
1E2E 56 00381 LD D,(HL) ;P/u granule allocation
1E2F ED53541E 00382 LD (EXTINFO+1),DE ;Modify later instruction
1E33 7B 00383 LD A,E ;Ck if extent in use
1E34 FEFE 00384 CP 0FEH
1E36 3006 00385 JR NC,FIXDIR ;Jump if not used
1E38 2C 00386 INC L
1E39 CD891E 00387 CALL RMVEXT ;Deallocate ext from GAT
1E3C 18EE 00388 JR REMOV3 ;Loop to next extent
00389 ;
00390 ; Deallocated last extent; clean up directory
00391 ;
1E3E 7D 00392 FIXDIR LD A,L ;Point to 1st byte
1E3F E6E0 00393 AND 0E0H ; of DIR entry
1E41 6F 00394 LD L,A
1E42 CBA6 00395 RES 4,(HL) ;Show dir entry spare
1E44 CD0318 00396 CALL @DIRWR ;Write the dir record
1E47 CC9718 00397 CALL Z,@HITRD ;Grab HIT => SBUFF$
1E4A 261D 00398 LD H,SBUFF$<-8 ;Point to HIT entry
1E4C 68 00399 LD L,B ; & zero out DEC pos
1E4D 3600 00400 LD (HL),0
1E4F CC9818 00401 CALL Z,@HITWR ;Write HIT back to disk
1E52 C0 00402 RET NZ ;Ret if read/write error
1E53 110000 00403 EXTINFO LD DE,0 ;P/u last extent info
00404 ;
00405 ; If extended directory record in use,
00406 ; D -> DEC of FXDE record
00407 ; E -> FE if FXDE, FF if extent unused
00408 ;
1E56 42 00409 LD B,D ;Ck for FXDE in use
1E57 7B 00410 LD A,E
1E58 FEFE 00411 CP 0FEH ;X'FE' => FXDE in use
1E5A 28C8 00412 JR Z,REMOV2 ;Jump if FXDE in use
1E5C CD7518 00413 CALL @GATWR ; else write the GAT
1E5F C0 00414 RET NZ ;Ret if write error
1E60 DDE5 00415 PUSH IX ;Transfer FCB address
1E62 E1 00416 POP HL ; to HL & zero out FCB
1E63 0620 00417 LD B,32 ;Init for 32 byte field
1E65 AF 00418 XOR A ;Zero the accumulator
1E66 77 00419 ZERLP1 LD (HL),A ;Go for it!
1E67 23 00420 INC HL
1E68 10FC 00421 DJNZ ZERLP1
1E6A C9 00422 RET
00423 ;
00424 ; REMOVE will only close a logical device
00425 ;
1E6B FE10 00426 CLOSDCB CP 10H ;Is this an open DCB?
1E6D 3E26 00427 LD A,38 ;Init "file not open
1E6F C0 00428 RET NZ
1E70 CD6615 00429 CALL LNKFCB@ ;Link to DCB (DE->IX)
1E73 DD4E06 00430 LD C,(IX+6) ;Get device name
1E76 DD4607 00431 LD B,(IX+7)
1E79 DD36002A 00432 LD (IX+0),'*' ;Stuff device indicator
1E7D DD7101 00433 LD (IX+1),C ;Stuff 1st char of name
1E80 DD7002 00434 LD (IX+2),B ;Stuff 2nd char of name
1E83 DD360303 00435 LD (IX+3),3 ;Terminate with ETX
1E87 AF 00436 XOR A
1E88 C9 00437 RET
00438 ;
00439 ; Deallocate an extent
00440 ;
1E89 E5 00441 RMVEXT PUSH HL
1E8A C5 00442 PUSH BC
1E8B 3E08 00443 LD A,8 ;P/u the # of grans per
1E8D CD2B1A 00444 CALL @DCTBYT ; cylinder into reg A
1E90 07 00445 RLCA ;Shift into bits 0-2
1E91 07 00446 RLCA
1E92 07 00447 RLCA
1E93 E607 00448 AND 7 ;Remove all else
1E95 3C 00449 INC A ;Adjust for zero offset
00450 ;
00451 ; Ck for 2-sided operation
00452 ;
1E96 6F 00453 LD L,A ;Save current grans/cyl
1E97 3E04 00454 LD A,4
1E99 CD2B1A 00455 CALL @DCTBYT ;Get 2-sided flag
1E9C CB6F 00456 BIT 5,A ;Test 2-sided
1E9E 7D 00457 LD A,L ;Xfer value back
1E9F 2801 00458 JR Z,$+3 ;Bypass if 1-sided
1EA1 87 00459 ADD A,A ; else multiply by 2
1EA2 32BA1E 00460 LD (GRNSCYL+1),A ;Modify later instruction
1EA5 6B 00461 LD L,E ;Relative cylinder -> L
1EA6 2623 00462 LD H,DIRBUF$<-8 ;Point to GAT byte
1EA8 7A 00463 LD A,D ;Rel gran & # of grans
1EA9 E61F 00464 AND 1FH ;Get # of grans
1EAB 4F 00465 LD C,A ; into reg C & adjust
1EAC 0C 00466 INC C ; for zero offset
1EAD AA 00467 XOR D ;Get rel gran & shift
1EAE 07 00468 RLCA ; into bits 0-2
1EAF 07 00469 RLCA
1EB0 07 00470 RLCA
1EB1 F5 00471 RMVEX1 PUSH AF ;Save rel starting gran
1EB2 46 00472 LD B,(HL) ;P/u allocation byte
1EB3 CDC51E 00473 CALL RMVGRN ;Turn off bit for a gran
1EB6 70 00474 LD (HL),B ;Update GAT byte
1EB7 F1 00475 POP AF ;Recover starting gran
1EB8 3C 00476 INC A ;Bump up
1EB9 FE00 00477 GRNSCYL CP 0 ;Ck with grans per cyl
1EBB 2002 00478 JR NZ,DECGRNS ;Go if still on this cyl
1EBD AF 00479 XOR A ; else zero gran counter
1EBE 2C 00480 INC L ;Bump to next cyl in GAT
1EBF 0D 00481 DECGRNS DEC C ;Decrement # of grans
1EC0 20EF 00482 JR NZ,RMVEX1 ;Go if more to deallocate
1EC2 C1 00483 POP BC ; else recover regs
1EC3 E1 00484 POP HL ; & go home
1EC4 C9 00485 RET
00486 ;
00487 ; Remove a bit to deallocate & free up a gran
00488 ;
1EC5 E607 00489 RMVGRN AND 7 ;Max 8-grans per cyl
1EC7 07 00490 RLCA ;Shift to create RES
1EC8 07 00491 RLCA
1EC9 07 00492 RLCA
1ECA F680 00493 OR 80H ;Merge rest of RES code
1ECC 32D01E 00494 LD (RMVGRN1+1),A ;Stuff into the inst
1ECF CB80 00495 RMVGRN1 RES 0,B ;Reset proper bit
1ED1 C9 00496 RET
00497 ;
1ED2 00498 LAST EQU $
00499 IFGT $,DIRBUF$
00500 ERR 'Module too big'
00501 ENDIF
23FE 00502 ORG MAXCOR$-2
23FE D200 00503 DW LAST-SYS10 ;Overlay size
00504 ;
1E00 00505 END SYS10
1E00 is the transfer address
00000 Total errors
[Copyright 1999,2002 Frank Durda IV, All Rights Reserved. Mirroring of any material on this page in any form is expressly prohibited. The official web site for this material is: http://nemesis.lonestar.org Contact this address for use clearances: clearance at nemesis.lonestar.org Comments and queries to this address: web_software_2011 at nemesis.lonestar.org]