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MISOSYS EDAS-4.3 04/11/99 22:42:31 SYS2 - LS-DOS 6.3 Page 00001
00001 ;SYS2/ASM - LS-DOS 6.3
00003 ;
00004 ; This SYS module performs the following functions:
00005 ; . OPENs an existing File or Device
00006 ; . INITs a new File
00007 ; . Checks availability of a specific drive
00008 ; . Hashes an 11-byte field (file name & ext)
00009 ; . Hashes an 8-byte field (password)
00010 ; . Renames a filespec/devspec
00011 ; . Gets the address of a device control block
00012 ;
000D 00013 CR EQU 13
00014 *LIST OFF ;Get SYS0/EQU
00330 *LIST ON
0000 00331 *GET COPYCOM:3 ;Copyright message
00332 ; COPYCOM - File for Copyright COMment block
00333 ;
0000 00334 *GET BUILDVER/ASM:3
00335 ;
00336 ; Buildver/asm is a bit of a kludge since not all utilities can load
00337 ; equates from LDOS60 and still compile. LOWCORE and everybody else
00338 ; relies on this setting, and it eventually ends up in LDOS60/EQU
00339 ; for programs that can use that.
00340 ;
FFFF 00341 @BLD631 EQU -1 ;<631>Build 631 distribution (LEVEL 1B)
00342 ; These switches activate patches made since the 1B release.
00343 ; It is important that all earlier patches be enabled when a higher
00344 ; patch is enabled.
00345 ; Patches C thru F were published in TMQ IV.iv, page 32 (NOTE: the
00346 ; patch addresses listed for SPOOL in SPOOL1/FIX are 19H high.)
FFFF 00347 @BLD631C EQU -1 ;<631>Apply 1C patches (SETKI)
FFFF 00348 @BLD631D EQU -1 ;<631>Apply 1D patches (DIR)
FFFF 00349 @BLD631E EQU -1 ;<631>Apply 1E patches (DIR & MEMDISK/DCT)
FFFF 00350 @BLD631F EQU -1 ;<631>Apply 1F patches (SPOOL)
00351 ; Patches G and H were published in TMQ V.i, pages 10 and 18/19.
FFFF 00352 @BLD631G EQU -1 ;<631>Apply 1G patches (//KEYIN,DIR,DO *)
FFFF 00353 @BLD631H EQU -1 ;<631>Apply 1H patches (MEMORY)
00354 ;
00355 ;End of BUILDVER/ASM
00356 IF @BLD631
00358 ELSE
00359 COM '<*(C) 1982,3,4,6 by LSI*>'
00360 ENDIF
00361 ;
1E00 00362 ORG 1E00H
00363 ;
1E00 E670 00364 SYS2 AND 70H ;Strip all but entry
1E02 C8 00365 RET Z ;Back on zero entry
1E03 FE10 00366 CP 10H ;Check for OPEN
1E05 CA5E1F 00367 JP Z,OPEN
1E08 FE20 00368 CP 20H ;Check for INIT
1E0A CA1821 00369 JP Z,INIT
1E0D FE70 00370 CP 70H ;Check for rename
1E0F CA1722 00371 JP Z,RENAME
1E12 FE30 00372 CP 30H ;Get a DCB?
1E14 2849 00373 JR Z,GTDCB
1E16 FE40 00374 CP 40H ;Drive availability?
1E18 2860 00375 JR Z,CKDRV
1E1A FE60 00376 CP 60H ;Check password hash
1E1C 2810 00377 JR Z,HASHPSWD
00378 ;
00379 ; Routine to hash a file name
00380 ;
00381 HASHNAME
1E1E 060B 00382 LD B,11 ;Init for 11 chars
1E20 AF 00383 XOR A ;Clear for start
1E21 AE 00384 HNAME1 XOR (HL) ;Modulo 2 addition
1E22 23 00385 INC HL ;Bump to next character
1E23 07 00386 RLCA ;Rotate bit structure
1E24 10FB 00387 DJNZ HNAME1 ; & loop for field len
1E26 B7 00388 OR A ;Do not permit a zero
1E27 2001 00389 JR NZ,HNAME2 ; hash code
1E29 3C 00390 INC A
1E2A 32DC22 00391 HNAME2 LD (FILEHASH),A ;Stuff code for later
1E2D C9 00392 RET
00393 ;
00394 ; Hash a password
00395 ;
00396 HASHPSWD
1E2E 210700 00397 LD HL,7 ;Hashing will be from
1E31 19 00398 ADD HL,DE ; right to left so
1E32 EB 00399 EX DE,HL ; point to lo-order
1E33 21FFFF 00400 LD HL,-1 ;Init shift reg to 1's
1E36 0608 00401 LD B,8 ;Init for 8-char string
1E38 1A 00402 HPSWD1 LD A,(DE) ;P/u the next byte
1E39 D5 00403 PUSH DE ; & save the pointer
1E3A 57 00404 LD D,A
1E3B 5C 00405 LD E,H
1E3C 7D 00406 LD A,L ;Modulo 2 add bits 0-2
1E3D E607 00407 AND 7 ; to bits 4-6 of the
1E3F 0F 00408 RRCA ; 16-bit shift register
1E40 0F 00409 RRCA
1E41 0F 00410 RRCA
1E42 AD 00411 XOR L
1E43 6F 00412 LD L,A ;Shift shift-register
1E44 2600 00413 LD H,0 ; left by 4-bits to
1E46 29 00414 ADD HL,HL ; isolate bits 4-7
1E47 29 00415 ADD HL,HL
1E48 29 00416 ADD HL,HL
1E49 29 00417 ADD HL,HL
1E4A AC 00418 XOR H ;Mod 2 add SR bits 4-7
1E4B AA 00419 XOR D ;Mod 2 add new byte
1E4C 57 00420 LD D,A ;Save tempy for hi-order
1E4D 7D 00421 LD A,L
1E4E 29 00422 ADD HL,HL
1E4F AC 00423 XOR H
1E50 AB 00424 XOR E
1E51 5F 00425 LD E,A
1E52 EB 00426 EX DE,HL ;SR result to HL
1E53 D1 00427 POP DE ;P/u pointer to string
1E54 1B 00428 DEC DE ; & point to next byte
1E55 10E1 00429 DJNZ HPSWD1 ;Loop for field length
1E57 AF 00430 XOR A
1E58 C9 00431 RET
00432 ;
00433 ; Routine to locate a Device Control Block
00434 ;
1E59 DD5E01 00435 GETDCB LD E,(IX+1) ;P/u the 2-character
1E5C DD5602 00436 LD D,(IX+2) ; device name
1E5F 210802 00437 GTDCB LD HL,KIDCB$ ;Point to 1st DCB
1E62 E5 00438 DEV1 PUSH HL
1E63 7D 00439 LD A,L ;Point to device
1E64 C606 00440 ADD A,6 ; name field
1E66 6F 00441 LD L,A
1E67 7E 00442 LD A,(HL) ;P/u 1st char of name
1E68 2C 00443 INC L ;Point to 2nd char
1E69 BB 00444 CP E ;Compare 1st for match
1E6A 2006 00445 JR NZ,DEV2 ;No match? then loop
1E6C 7E 00446 LD A,(HL) ;1st matches, does 2nd?
1E6D BA 00447 CP D
1E6E 2002 00448 JR NZ,DEV2 ;Loop if no match
1E70 E1 00449 POP HL ;Get start of DCB
1E71 C9 00450 RET
1E72 F1 00451 DEV2 POP AF ;Pop last DCB start
1E73 2C 00452 INC L ;Inc to start of next DCB
1E74 20EC 00453 JR NZ,DEV1 ;Bypass if not at end
00454 ;
00455 ; Device not found in tables
00456 ;
1E76 3E08 00457 LD A,8 ;"device not available"
1E78 B7 00458 OR A
1E79 C9 00459 RET
00460 ;
00461 ; Check a drive for availability
00462 ;
1E7A FDE5 00463 CKDRV PUSH IY ;We use IY in disk I/O
1E7C CD1E1A 00464 CALL @GTDCT ;Get driver routine addr
1E7F FD7E00 00465 LD A,(IY+0) ;P/u drive vector
1E82 FEC3 00466 CP 0C3H ;Ck for enabled
1E84 C2311F 00467 JP NZ,CKDR5 ;Bypass if disabled
1E87 E5 00468 PUSH HL
1E88 D5 00469 PUSH DE
1E89 FDCB035E 00470 BIT 3,(IY+3) ;Test for HARD drive
1E8D 2019 00471 JR NZ,CKDRV1A ;If so bypass range check
1E8F FD7E06 00472 LD A,(IY+6) ;Make sure the current
1E92 FDBE05 00473 CP (IY+5) ; cylinder is in range
1E95 3006 00474 JR NC,CKDRV1 ;Go if in range
1E97 CDC819 00475 CALL @RSTOR ;Restore drive
1E9A C2401F 00476 JP NZ,CKDR7A ;Go if error
00477 ;
1E9D FD5605 00478 CKDRV1 LD D,(IY+5) ;P/u current track
1EA0 1E00 00479 LD E,0 ;Set for sector 0
1EA2 CDD019 00480 CALL @SEEK ;Set track info to FDC
1EA5 C2401F 00481 JP NZ,CKDR7A ;Go if error
1EA8 CDD419 00482 CKDRV1A CALL @RSLCT ;Wait until not busy
1EAB C2401F 00483 JP NZ,CKDR7A ;Not there - ret NZ
1EAE FDCB035E 00484 BIT 3,(IY+3) ;If hard drive, bypass
1EB2 2032 00485 JR NZ,CKDR2B ; index pulse
1EB4 FDCB0466 00486 BIT 4,(IY+4) ;If "ALIEN" by pass
1EB8 202C 00487 JR NZ,CKDR2B ; test of index pulses
00488 IF @MOD4
1EBA 3A0E00 00489 LD A,(FDDINT$) ;Check 'SMOOTH' state
1EBD B7 00490 OR A
1EBE 3E09 00491 LD A,09 ;Set MSB of count down
1EC0 2803 00492 JR Z,INTRON ;Go if not SMOOTH
1EC2 CB3F 00493 SRL A ;Divide the count by two
1EC4 F3 00494 DI
00495 ENDIF
00496 IF @MOD2
00497 LD A,20
00498 ENDIF
1EC5 32D71E 00499 INTRON LD (CDCNT+1),A ;Store in 'LD H' instruction
1EC8 212000 00500 LD HL,0020H ;Set up count (short)
00501 ;
00502 ; Test for diskette in drive & rotating
00503 ;
1ECB CD341F 00504 CKDR1 CALL INDEX ;Test index pulse
1ECE 20FB 00505 JR NZ,CKDR1 ;Jump on index
1ED0 FDCB047E 00506 BIT 7,(IY+4) ;Check CKDRV inhibit bit
1ED4 2010 00507 JR NZ,CKDR2B ;If on skip index test
1ED6 2600 00508 CDCNT LD H,00H ;CKDRV counter (long)
00509 ;Count set from above
1ED8 CD341F 00510 CKDR2 CALL INDEX ;Test index pulse
1EDB 28FB 00511 JR Z,CKDR2 ;Jump on no index
00512 IF @MOD4
1EDD FB 00513 EI ;OK for INTs now
00514 ENDIF
1EDE 212000 00515 LD HL,0020H ;Index off wait (short)
1EE1 CD341F 00516 CKDR2A CALL INDEX
1EE4 20FB 00517 JR NZ,CKDR2A ;Jump on index
00518 ;
00519 ; Diskette is rotating
00520 ;
1EE6 F5 00521 CKDR2B PUSH AF ;Save FDC status
1EE7 CDF718 00522 CALL @DIRCYL ;Get directory track in D
1EEA 21001D 00523 LD HL,SBUFF$ ;Point to HIT buffer
1EED 5D 00524 LD E,L ;Sector 0 for GAT
1EEE CDD818 00525 CALL @RDSSC ;Read the GAT
1EF1 204C 00526 JR NZ,CKDR7 ;Jump on error
00527 ;
00528 ; Update YFLAG$ for year type
00529 ;
1EF3 ED5BCC1D 00530 LD DE,(SBUFF$+0CCH) ;Gat type byte
1EF7 79 00531 LD A,C ;Drive # to A
1EF8 07 00532 RLCA ;Rotate it into posn
1EF9 07 00533 RLCA ;For SET x,(hl)
1EFA 07 00534 RLCA ; opcode
1EFB F6C6 00535 OR 0C6H ;For SET opcode
1EFD CB5A 00536 BIT 3,D ;Is disk new type?
1EFF 2002 00537 JR NZ,FIXBIT ;Go if so
1F01 EE40 00538 XOR 40H ;Else make RES opcode
1F03 320A1F 00539 FIXBIT LD (BIT1),A ;Save opcode
1F06 218200 00540 LD HL,YFLAG$ ;Pt to year type flag
1F09 CB 00541 DB 0CBH ;Either SET or RES
1F0A 00 00542 BIT1 DB 0
1F0B FDCB035E 00543 BIT 3,(IY+3) ;If rigid drive,
1F0F 2012 00544 JR NZ,CKDR3 ; bypass the rest
1F11 3E22 00545 LD A,22H ;Add offset
1F13 83 00546 ADD A,E
1F14 FD7706 00547 LD (IY+6),A ;Max track # to DCT
1F17 FDCB04AE 00548 RES 5,(IY+4) ;Set to side 0
1F1B CB6A 00549 BIT 5,D ;Test double sided
1F1D 2804 00550 JR Z,CKDR3 ;Jump if only single
1F1F FDCB04EE 00551 SET 5,(IY+4) ;Set for side 2
1F23 F1 00552 CKDR3 POP AF ;Recover FDC status
1F24 07 00553 CKDR3A RLCA ;Shift write prot to 7
1F25 FDB603 00554 OR (IY+3) ;Merge Soft WP bit
1F28 E680 00555 AND 80H ;Strip all but 7
1F2A 328020 00556 LD (OPNCB9+1),A ;Save WP status for OPNCB
1F2D 87 00557 ADD A,A ;Write prot to carry flg
00558 ;
1F2E 00559 CKDR4 EQU $
1F2E FB 00560 EI
1F2F D1 00561 POP DE
1F30 E1 00562 POP HL
1F31 FDE1 00563 CKDR5 POP IY
1F33 C9 00564 RET
1F34 7C 00565 INDEX LD A,H
1F35 B5 00566 OR L
1F36 2807 00567 JR Z,CKDR7
1F38 2B 00568 DEC HL
1F39 CDD419 00569 CALL @RSLCT ;Check for index pulse
1F3C CB4F 00570 BIT 1,A ;Test index
1F3E C9 00571 RET
1F3F F1 00572 CKDR7 POP AF
00573 ;
1F40 B7 00574 CKDR7A OR A ;Set NZ ret
1F41 18EB 00575 JR CKDR4 ; and exit
00576 ;
00577 ; OPEN a device
00578 ; Device Control Blocks are from X'0208' - X'02FF'
00579 ;
1F43 CD591E 00580 DEVOPEN CALL GETDCB ;Find the DCB named
1F46 C0 00581 RET NZ ; in the IX pointer
00582 ;
00583 ; Found the needed Device Control Block
00584 ;
1F47 44 00585 DEV4 LD B,H ;Xfer dcb vector to BC
1F48 4D 00586 LD C,L
1F49 DDE5 00587 PUSH IX ;User DCB to HL
1F4B E1 00588 POP HL
1F4C 3610 00589 LD (HL),10H ;Show routed
1F4E 23 00590 INC HL
1F4F 71 00591 LD (HL),C ;Stuff dcb vector
1F50 23 00592 INC HL
1F51 70 00593 LD (HL),B
1F52 23 00594 INC HL
1F53 AF 00595 XOR A ;Zero next 3 bytes
1F54 77 00596 LD (HL),A
1F55 23 00597 INC HL
1F56 77 00598 LD (HL),A
1F57 23 00599 INC HL
1F58 77 00600 LD (HL),A
1F59 23 00601 INC HL
1F5A 73 00602 LD (HL),E ;Stuff dcb name
1F5B 23 00603 INC HL
1F5C 72 00604 LD (HL),D
1F5D C9 00605 RET
00606 ;
00607 ;
00608 ; OPEN a file
00609 ; HL <= the address of a 256-byte buffer
00610 ; DE <= the address of a 32-byte FCB
00611 ; B <= the logical record length (LREC)
00612 ;
1F5E CD6615 00613 OPEN CALL LNKFCB@ ;Set up link to dcb
1F61 3A7C00 00614 OPEN1 LD A,(SFLAG$) ;Stuff current sysflag
1F64 323620 00615 LD (OPEN14+1),A ; to check later then
1F67 E6F8 00616 AND 0F8H ; remove bits 0, 1 & 2
1F69 327C00 00617 LD (SFLAG$),A
1F6C DD7E00 00618 LD A,(IX+0)
1F6F FE2A 00619 CP '*' ;If name starts with '*',
1F71 28D0 00620 JR Z,DEVOPEN ; it is a device spec
1F73 78 00621 LD A,B ;P/u Lrl requested
1F74 32DB22 00622 LD (LREC$),A
1F77 22C520 00623 LD (OPNCB4+1),HL ;Stuff disk I/O buffer
1F7A DDE5 00624 PUSH IX ;Transfer the filespec
1F7C E1 00625 POP HL ; into the system
1F7D CD9E21 00626 CALL XFRSPEC ; buffer area
1F80 C0 00627 RET NZ ;Return if bad name
1F81 21C622 00628 LD HL,NAME$EXT ;Point to name/ext field
1F84 CD1E1E 00629 CALL HASHNAME ; & hash it (11 chars)
1F87 11BE22 00630 LD DE,PSWDBUF ;Point to the password
1F8A CD2E1E 00631 CALL HASHPSWD ; & hash it
1F8D 22D122 00632 LD (PW$HASH1),HL ;Stuff owner pswd
1F90 22D322 00633 LD (PW$HASH2),HL ;Stuff user pswd
1F93 3E00 00634 OPEN2 LD A,0 ;P/u drive
1F95 4F 00635 LD C,A
1F96 3C 00636 INC A ;Jump if :d entered
1F97 2001 00637 JR NZ,OPEN3
1F99 4F 00638 LD C,A
1F9A CD7A1E 00639 OPEN3 CALL CKDRV ;Drive available?
1F9D 2013 00640 JR NZ,OPEN6 ;Jump if not
1F9F CD9718 00641 CALL @HITRD ;Get hash index table
1FA2 C0 00642 RET NZ ;Return if read error
00643 ;
00644 ; Compare hashed filename/ext with each entry
00645 ; in the HIT to see if file is on this drive
00646 ;
1FA3 7E 00647 OPEN4 LD A,(HL) ;Bypass HIT entry if
1FA4 B7 00648 OR A ; unused
1FA5 2808 00649 JR Z,OPEN5
1FA7 E5 00650 PUSH HL ;Not vacant
1FA8 21DC22 00651 LD HL,FILEHASH ;Point to DEC
1FAB BE 00652 CP (HL) ;Compare with HIT entry
1FAC E1 00653 POP HL
1FAD 2821 00654 JR Z,OPEN9 ;Jump if a match else
1FAF 2C 00655 OPEN5 INC L ; bump to next entry
1FB0 20F1 00656 JR NZ,OPEN4 ;Loop until 256 bytes
00657 ;
00658 ; File not on this drive
00659 ;
1FB2 CDBB1F 00660 OPEN6 CALL TESTDRV ;Bump drive if we can
1FB5 38E3 00661 JR C,OPEN3 ;Loop if another to test
1FB7 3E18 00662 OPEN7 LD A,24 ;File not found error
1FB9 B7 00663 OR A
1FBA C9 00664 RET
1FBB 3A941F 00665 TESTDRV LD A,(OPEN2+1) ;If drive still X'FF',
1FBE 3C 00666 INC A ; then advance to next
1FBF B7 00667 OR A ;Reset Carry for ret w/o
1FC0 C0 00668 RET NZ ; affecting Z/NZ result
1FC1 0C 00669 INC C ;Bump drive counter
1FC2 79 00670 LD A,C
1FC3 FE08 00671 CP 8 ;Loop end, 8 max
1FC5 C9 00672 RET
00673 ;
00674 ; Although the HIT entry matched, the filename/ext
00675 ; did not (due to a collision). Continue to scan
00676 ; the rest of the hash index table.
00677 ;
1FC6 C1 00678 OPEN8 POP BC ;Remove ret address and
1FC7 E1 00679 POP HL ; excess registers
1FC8 C1 00680 POP BC
1FC9 CD9718 00681 CALL @HITRD ;Re-read the hit
1FCC E1 00682 POP HL
1FCD C0 00683 RET NZ ;Go on i/o error
1FCE 18DF 00684 JR OPEN5
00685 ;
00686 ; The hashed name matches, read the directory
00687 ;
1FD0 E5 00688 OPEN9 PUSH HL
1FD1 C5 00689 PUSH BC
1FD2 45 00690 LD B,L ;Set up the DEC
1FD3 CDBB18 00691 CALL @DIRRD
1FD6 2803 00692 JR Z,OPEN10 ;Jump if no error
1FD8 C1 00693 POP BC ; else pop returns
1FD9 E1 00694 POP HL
1FDA C9 00695 RET ; & exit
00696 ;
00697 ; Verify that directory entry is this file
00698 ;
1FDB E5 00699 OPEN10 PUSH HL
1FDC C5 00700 PUSH BC ;Save drive (reg C)
00701 ;
00702 ; If bit 7 is set, it denotes an extended
00703 ; directory entry which does not include
00704 ; the filename. Go to next HIT entry if set
00705 ;
1FDD CB7E 00706 BIT 7,(HL) ;Test for FXDE
1FDF 20E5 00707 JR NZ,OPEN8 ;Jump if extended
1FE1 CB66 00708 BIT 4,(HL) ;If DIR record spare,
1FE3 28E1 00709 JR Z,OPEN8 ; continue to search
1FE5 3E05 00710 LD A,5 ;Point to filename/ext
1FE7 85 00711 ADD A,L ; field in directory
1FE8 6F 00712 LD L,A
1FE9 11C622 00713 LD DE,NAME$EXT ;Point to entered name
1FEC 060B 00714 LD B,11 ;Init to check 11 chars
1FEE 1A 00715 OPEN11 LD A,(DE) ;Verify a match
1FEF BE 00716 CP (HL) ; or no match
1FF0 20D4 00717 JR NZ,OPEN8 ;Go to next HIT entry
1FF2 23 00718 INC HL ; if no match; else bump
1FF3 13 00719 INC DE ; pointers & loop
1FF4 10F8 00720 DJNZ OPEN11
1FF6 C1 00721 POP BC ;Matches! get drive #
1FF7 79 00722 LD A,C ; & stuff it
1FF8 32941F 00723 LD (OPEN2+1),A
1FFB E1 00724 POP HL
1FFC F1 00725 POP AF
1FFD F1 00726 POP AF
1FFE C5 00727 PUSH BC ;Save DEC and drive
1FFF E5 00728 PUSH HL ;Save ptr to dir record
2000 7E 00729 LD A,(HL) ;P/u 1st byte of dir rec
2001 32D722 00730 LD (DIR$INIT),A ;Stuff it
2004 E607 00731 AND 7 ;Strip all but protection
2006 4F 00732 LD C,A
2007 0600 00733 LD B,0
2009 3E10 00734 LD A,16 ;Point to update password
200B 85 00735 ADD A,L
200C 6F 00736 LD L,A
200D ED5BD322 00737 LD DE,(PW$HASH2) ;P/u password hash
2011 7E 00738 LD A,(HL) ;P/u owner pswd lo order
2012 23 00739 INC HL
2013 E5 00740 PUSH HL
2014 66 00741 LD H,(HL) ;P/u owner pswd hi order
2015 6F 00742 LD L,A
2016 3A7700 00743 LD A,(NFLAG$) ;P/u NFLAG$
2019 CB7F 00744 BIT 7,A ;Check network active bit
201B 2802 00745 JR Z,USEPWD
201D 54 00746 LD D,H
201E 5D 00747 LD E,L
201F AF 00748 USEPWD XOR A ;Compare password entry
2020 ED52 00749 SBC HL,DE ; with owner password
2022 E1 00750 POP HL
2023 2822 00751 WASMAT JR Z,OPEN16 ;Grant access if match
2025 79 00752 LD A,C ;Recover protection
2026 FE07 00753 CP 7 ;Abort if "no access"
2028 2006 00754 JR NZ,OPEN13 ;Have access if not "no"
00755 ;
00756 ; File is password protected - abort
00757 ;
202A E1 00758 OPEN12 POP HL
202B C1 00759 POP BC
202C 3E19 00760 LD A,25 ;"file access denied"
202E B7 00761 OR A
202F C9 00762 RET
00763 ;
00764 ; Check if prot is exec only
00765 ;
2030 79 00766 OPEN13 LD A,C
2031 FE06 00767 CP 6 ;Check for EXEC ONLY
2033 2012 00768 JR NZ,OPEN16 ;Jump if not
2035 0600 00769 OPEN14 LD B,0 ;P/u SFLAG$ entry state
2037 CB50 00770 BIT 2,B ;Did RUN request open?
2039 2807 00771 JR Z,OPEN15 ;Bypass if NOT from RUN
203B 217C00 00772 LD HL,SFLAG$
203E CBCE 00773 SET 1,(HL) ;Show RUN & EXEC file
2040 3E05 00774 LD A,5 ;Set read access for now
2042 21791A 00775 OPEN15 LD HL,SET@EXEC ;Set RST vector to turn
2045 36C9 00776 LD (HL),0C9H ; off DEBUG
2047 32B520 00777 OPEN16 LD (OPNCB1+1),A ;Stuff access level
204A E1 00778 POP HL ;Ptr to direc record
204B C1 00779 POP BC ;P/u DEC and drive
00780 ;
00781 ; Routine to open up the fcb from the directory
00782 ; HL => directory record in SBUFF$
00783 ; BC => DEC and drive used for directory read/write
00784 ; IX => pointer to File Control Block
00785 ;
204C FDE5 00786 OPNCB PUSH IY ;Save IY
204E E5 00787 PUSH HL ;Transfer direc record
204F FDE1 00788 POP IY ; ptr to IY
2051 C5 00789 PUSH BC ;Save DEC and drive
2052 CDA520 00790 CALL OPNCB0 ;Create the opened FCB
2055 C1 00791 POP BC
2056 213620 00792 LD HL,OPEN14+1 ;If from LOAD, don't do
2059 CB46 00793 BIT 0,(HL) ; any further checks
205B 2804 00794 JR Z,OPNEX1
205D AF 00795 XOR A
205E FDE1 00796 OPNEX POP IY
2060 C9 00797 RET
2061 FDCB016E 00798 OPNEX1 BIT 5,(IY+1) ;If file already open
2065 280F 00799 JR Z,OPNCB8 ; then set read-only
2067 FDE1 00800 POP IY ; & return "file open...
2069 DD7E01 00801 OPNEX2 LD A,(IX+1) ;P/u current attributes
206C E6F8 00802 AND 0F8H ;Mask off current prot
206E F605 00803 OR 5 ; & replace with READ
2070 DD7701 00804 LD (IX+1),A ;Reset access to READ
2073 3E29 00805 LD A,41 ;Set "file already open"
2075 C9 00806 RET
00807 ;
00808 ; If access level is > read, set file open flag in
00809 ; the directory & note close authority in the FCB.
00810 ;
2076 DD7E01 00811 OPNCB8 LD A,(IX+1) ;P/u FCB access level
2079 E607 00812 AND 7 ;Mask off other junk
207B FE05 00813 CP 5 ;Ck READ, EXEC, NONE
207D 3017 00814 JR NC,OPNCB10 ;Go if one of the above
207F 3E00 00815 OPNCB9 LD A,0 ;P/u CKDRV status
2081 07 00816 RLCA ;Was drive write prot?
2082 381C 00817 JR C,FRCREAD ;CF = WP
2084 FDCB01EE 00818 SET 5,(IY+1) ;Set file open in direc
2088 3A7700 00819 LD A,(NFLAG$) ;P/u Nflag
208B CB47 00820 BIT 0,A ;Check for function ON
208D C40318 00821 CALL NZ,@DIRWR ;Write the directory
2090 20CC 00822 JR NZ,OPNEX
2092 DDCB00F6 00823 SET 6,(IX+0) ;Set close authority
00824 ;
00825 ; Ck if passed LRL matches directory
00826 ;
2096 DD7E09 00827 OPNCB10 LD A,(IX+9) ;P/u LRL from FCB &
2099 FDBE04 00828 CP (IY+4) ; compare with directory
209C 3E2A 00829 LD A,42 ;Init "LRL open fault
209E 18BE 00830 JR OPNEX
00831 ;
00832 ; Disk write protected - Change access to READ
00833 ;
20A0 CD6920 00834 FRCREAD CALL OPNEX2 ;Change access to READ
20A3 18F1 00835 JR OPNCB10
00836 ;
00837 ; This routine creates the open file control block
00838 ;
20A5 EB 00839 OPNCB0 EX DE,HL
20A6 DDE5 00840 PUSH IX ;Transfer fcb pointer
20A8 E1 00841 POP HL
20A9 1A 00842 LD A,(DE) ;Get DIR+0
20AA E620 00843 AND 20H ;Keep "PDS" bit & show
20AC F680 00844 OR 80H ; FCB as open
20AE 77 00845 LD (HL),A ;Shove into FCB+0
20AF 23 00846 INC HL
20B0 3ADB22 00847 LD A,(LREC$) ;P/u lrl
20B3 B7 00848 OR A ;Test for 0 (256)
20B4 3E00 00849 OPNCB1 LD A,0 ;Now start byte 2 with
20B6 2802 00850 JR Z,OPNCB2 ; that set by "OPEN16"
20B8 F680 00851 OR 80H ;Show sector or byte I/O
20BA F620 00852 OPNCB2 OR 20H ;Show buffer is empty
00853 ;
00854 ; Set bit 3 if filespec ended in an
00855 ; exclamation point. This causes the
00856 ; directory to be updated on every
00857 ; file write where the EOF is extended
00858 ;
20BC F600 00859 OPNCB3 OR 0
20BE 77 00860 LD (HL),A ;Init FCB+1
20BF 23 00861 INC HL
20C0 AF 00862 XOR A
20C1 77 00863 LD (HL),A ;Init FCB+2 with 0
20C2 23 00864 INC HL
20C3 D5 00865 PUSH DE ;Put address of disk I/O
20C4 110000 00866 OPNCB4 LD DE,0 ; buf into FCB+3 & FCB+4
20C7 73 00867 LD (HL),E
20C8 23 00868 INC HL
20C9 72 00869 LD (HL),D
20CA 23 00870 INC HL
20CB D1 00871 POP DE ;FCB+5 with 0 for
20CC 77 00872 LD (HL),A ; lo order next
20CD 23 00873 INC HL
20CE 71 00874 LD (HL),C ;FCB+6 with drive
20CF 23 00875 INC HL
20D0 70 00876 LD (HL),B ;FCB+7 with DEC
20D1 23 00877 INC HL
20D2 13 00878 INC DE ;Point to DIR EOF byte
20D3 13 00879 INC DE
20D4 13 00880 INC DE
20D5 1A 00881 LD A,(DE) ;P/u DIR lo order EOF
20D6 77 00882 LD (HL),A ; & stuff into FCB+8
20D7 23 00883 INC HL
20D8 13 00884 INC DE
20D9 3ADB22 00885 LD A,(LREC$) ;P/u lrl & stuff
20DC 77 00886 LD (HL),A ; into FCB+9
20DD 23 00887 INC HL
20DE AF 00888 XOR A
20DF 77 00889 LD (HL),A ;Init FCB+10 & FCB+11
20E0 23 00890 INC HL ; with zero for NRN
20E1 77 00891 LD (HL),A
20E2 23 00892 INC HL
20E3 CBE3 00893 SET 4,E ;Point to file EOF
20E5 010200 00894 LD BC,2 ;Move ERN
20E8 EB 00895 EX DE,HL
20E9 EDB0 00896 LDIR ; and zero BC reg
20EB EB 00897 EX DE,HL
20EC 3E05 00898 LD A,5 ;Max 5 extents
20EE F5 00899 PUSH AF
20EF 1A 00900 OPNCB5 LD A,(DE) ;Move starting track
20F0 77 00901 LD (HL),A
20F1 23 00902 INC HL
20F2 13 00903 INC DE
20F3 1A 00904 LD A,(DE) ;Move grans & offset
20F4 77 00905 LD (HL),A
20F5 23 00906 INC HL
20F6 E61F 00907 AND 1FH ;Strip out grans
20F8 3C 00908 INC A ;Bump for zero offset
00909 ;
00910 ; Add reg A to reg pair BC
00911 ;
20F9 81 00912 ADD A,C ;Add previous count
20FA 4F 00913 LD C,A ;Update C
20FB 3001 00914 JR NC,$+3 ;Go if no carry to B
20FD 04 00915 INC B
20FE F1 00916 POP AF ;Recover counter
20FF 3D 00917 DEC A ;Decrement loop
2100 C8 00918 RET Z ;Done if moved in 5
2101 F5 00919 PUSH AF
2102 13 00920 INC DE
2103 1A 00921 LD A,(DE) ;Test for end of extents
2104 FEFE 00922 CP 0FEH ;Extent in use?
2106 3006 00923 JR NC,OPNCB6 ;Jump if not
2108 71 00924 LD (HL),C ;Stuff # of cumulative
2109 23 00925 INC HL ; grans to this
210A 70 00926 LD (HL),B ; allocation into FCB
210B 23 00927 INC HL
210C 18E1 00928 JR OPNCB5 ;Loop for next
00929 ;
00930 ; Unused extents - put X'FFFF' in remaining fields
00931 ;
210E F1 00932 OPNCB6 POP AF ;Recover counter
210F 07 00933 RLCA ;Make times 4 and
2110 07 00934 RLCA ; fill remaining
2111 47 00935 LD B,A ; extent bytes with
2112 36FF 00936 OPNCB7 LD (HL),0FFH ; 0FFH
2114 23 00937 INC HL
2115 10FB 00938 DJNZ OPNCB7
2117 C9 00939 RET
00940 ;
00941 ; INIT a file
00942 ; HL => the address of a 256-byte buffer
00943 ; DE => the address of a 32-byte FCB
00944 ; B => the logical record length (LREC)
00945 ;
2118 CD6615 00946 INIT CALL LNKFCB@ ;Link to FCB
211B 32B520 00947 LD (OPNCB1+1),A ;Start FCB+1 with 0
211E 3E10 00948 LD A,10H ;Init for no prot on
2120 323221 00949 LD (INIT0),A ; a new file
2123 E5 00950 PUSH HL
2124 217C00 00951 LD HL,SFLAG$ ;Reset called by RUN bit
2127 CB96 00952 RES 2,(HL)
2129 E1 00953 POP HL
212A CD611F 00954 CALL OPEN1 ;Can we "OPEN" the file?
212D C8 00955 RET Z ;Return if file existing
212E FE18 00956 CP 24 ;Return if error not
2130 C0 00957 RET NZ ; "file not found"
2131 3E10 00958 LD A,10H ;Set dir rec to show
2132 00959 INIT0 EQU $-1
2133 32D722 00960 LD (DIR$INIT),A ; assigned
2136 3A941F 00961 LD A,(OPEN2+1) ;P/u the drive entry
2139 4F 00962 LD C,A
213A 3C 00963 INC A ;Jump if a drive entry
213B F5 00964 PUSH AF
213C 2001 00965 JR NZ,INIT1 ; was made
213E 4F 00966 LD C,A
213F F1 00967 INIT1 POP AF ;Stack integrity
2140 CD7A1E 00968 CALL CKDRV ;Is this drive available?
2143 200C 00969 JR NZ,INIT2 ;Jump if not
2145 380A 00970 JR C,INIT2 ; or if write protected
2147 CD9718 00971 CALL @HITRD ;Read hash index table
214A C0 00972 RET NZ ;Return if read error
214B CD0A22 00973 CALL SPRHIT ;Locate spare entry
214E 281F 00974 JR Z,INIT4 ;Jump if space
2150 AF 00975 XOR A ;Set status of CKDRV=Z
2151 F5 00976 INIT2 PUSH AF ;Save last CKDRV status
2152 CDBB1F 00977 CALL TESTDRV
2155 38E8 00978 JR C,INIT1 ;Loop if not at end
2157 3A941F 00979 LD A,(OPEN2+1) ;If drivespec not entered
215A 3C 00980 INC A ; then "directory full
215B 2003 00981 JR NZ,INIT2A
215D F1 00982 POP AF ;Stack integrity
215E 1805 00983 JR ERR26
2160 F1 00984 INIT2A POP AF ; else if no drive then
2161 2008 00985 JR NZ,ERR32 ; "illegal drive...
2163 3803 00986 JR C,ERR15 ; else if write protect
2165 3E1A 00987 ERR26 LD A,26 ; "directory space full"
2167 01 00988 DB 1
2168 3E0F 00989 ERR15 LD A,15 ;"write protect...
216A 01 00990 DB 1
216B 3E20 00991 ERR32 LD A,32 ;"Illegal drive...
216D B7 00992 OR A
216E C9 00993 RET
00994 ;
00995 ; Found a spare HIT entry position
00996 ;
216F 45 00997 INIT4 LD B,L ;Save DEC
2170 3ADC22 00998 LD A,(FILEHASH) ;P/u filespec hash
2173 77 00999 LD (HL),A ; & store in HIT
2174 CD9818 01000 CALL @HITWR ;Write updated HIT
2177 CCBB18 01001 CALL Z,@DIRRD ;Read that dir record
217A C0 01002 RET NZ ;Return if read error
217B E5 01003 PUSH HL
217C C5 01004 PUSH BC
217D EB 01005 EX DE,HL
217E 010500 01006 LD BC,5 ;Move 1st 5 bytes into
2181 21D722 01007 LD HL,DIR$INIT ; directory record
2184 EDB0 01008 LDIR
2186 0E11 01009 LD C,17 ;Move filename & password
2188 21C622 01010 LD HL,NAME$EXT ; info into directory
218B EDB0 01011 LDIR
218D EB 01012 EX DE,HL
218E 060A 01013 LD B,10 ;Put X'FFFF' into 5 ext's
2190 CD1221 01014 INIT5 CALL OPNCB7 ;4 for the ext's & 1 for
2193 C1 01015 POP BC ; staarting info
2194 CD0318 01016 CALL @DIRWR ;Write updated directory
2197 E1 01017 POP HL
2198 C0 01018 RET NZ ;Return if write error
2199 CD4C20 01019 CALL OPNCB ; else open the fcb
219C 37 01020 SCF ;Indicate new file
219D C9 01021 RET
01022 ;
01023 ; Xfer the file spec to system buffer area
01024 ;
219E 0613 01025 XFRSPEC LD B,19
21A0 11BE22 01026 LD DE,PSWDBUF
21A3 3E20 01027 LD A,20H ;Blank out the filename
21A5 12 01028 XSPEC1 LD (DE),A ; field in system buffer
21A6 13 01029 INC DE
21A7 10FC 01030 DJNZ XSPEC1
21A9 3EFF 01031 LD A,0FFH ;Set drive to X'FF' for
21AB 32941F 01032 LD (OPEN2+1),A ; checking user entry
21AE 1EC6 01033 LD E,NAME$EXT&0FFH ;Xfer file name
01034 IF @BLD631
21B0 CDEE21 01035 CALL XSPEC8B ;<631>
01036 ELSE
01037 CALL XSPEC8
01038 ENDIF
21B3 4F 01039 LD C,A
21B4 78 01040 LD A,B
21B5 D608 01041 SUB 8 ;Any valid chars found?
21B7 2003 01042 JR NZ,XSPEC3 ;Jump if valid name
01043 ;
01044 ; Filename was invalid format
01045 ;
21B9 F613 01046 OR 19 ;"illegal file name"
21BB C9 01047 RET
01048 ;
01049 ; Continue to check file spec
01050 ;
21BC 79 01051 XSPEC3 LD A,C
21BD FE2F 01052 CP '/' ;Ext entered?
21BF 1ECE 01053 LD E,FILE$EXT&0FFH
21C1 0603 01054 LD B,3
21C3 CCF021 01055 CALL Z,XSPEC8A ;Xfer the ext
21C6 FE2E 01056 CP '.' ;Password entered?
21C8 1EBE 01057 LD E,PSWDBUF&0FFH
01058 IF @BLD631
21CA CCE921 01059 CALL Z,XSPEC8 ;<631>Xfer the password
01060 ELSE
01061 JR NZ,XSPEC3A
01062 LD A,17H ;If a password, set init
01063 LD (INIT0),A ; to show "no" prot level
01064 CALL XSPEC8 ;Xfer the password
01065 ENDIF
21CD FE3A 01066 XSPEC3A CP ':' ;Drive entered?
21CF 200D 01067 JR NZ,XSPEC6
21D1 7E 01068 LD A,(HL) ;P/u drive #
21D2 D630 01069 SUB '0' ;Convert to binary
21D4 32941F 01070 LD (OPEN2+1),A ;Stuff drive #
21D7 E6F8 01071 AND 0F8H ;Must be <0-7>
21D9 3E20 01072 LD A,32 ;"illegal drive #"
21DB C0 01073 RET NZ ;Return error if out
21DC 23 01074 INC HL ; of range
21DD 7E 01075 LD A,(HL) ;Does filespec end in
21DE D621 01076 XSPEC6 SUB 21H ; exclamation point?
21E0 3E08 01077 LD A,8 ;Init to set bit 3 of
21E2 2801 01078 JR Z,XSPEC7 ; FCB+1 & jump if "!"
21E4 AF 01079 XOR A ; else reset if not
21E5 32BD20 01080 XSPEC7 LD (OPNCB3+1),A
21E8 C9 01081 RET
01082 ;
01083 ;
01084 ;
01085 XSPEC8
01086 IF @BLD631
21E9 3E17 01087 LD A,17H ;If a password, set init
21EB 323221 01088 LD (INIT0),A ; to show "no" prot level
01089 XSPEC8B
01090 ENDIF
21EE 0608 01091 LD B,8
21F0 7E 01092 XSPEC8A LD A,(HL) ;P/u a filespec character
21F1 23 01093 INC HL ; & 1st test for A-Z
21F2 1809 01094 JR XSPEC10
21F4 7E 01095 XSPEC9 LD A,(HL) ;P/u a filespec character
21F5 23 01096 INC HL ;Advance to next one
21F6 FE30 01097 CP '0' ;Check for 0-9
21F8 D8 01098 RET C
21F9 FE3A 01099 CP '9'+1
21FB 3806 01100 JR C,XSPEC11
21FD FE41 01101 XSPEC10 CP 'A' ;Check for A-Z
21FF D8 01102 RET C
2200 FE5B 01103 CP 'Z'+1
2202 D0 01104 RET NC
2203 12 01105 XSPEC11 LD (DE),A ;Character is valid
2204 13 01106 INC DE ;Advance to next one
2205 10ED 01107 DJNZ XSPEC9 ; & loop
2207 7E 01108 LD A,(HL) ;P/u following character
2208 23 01109 INC HL
2209 C9 01110 RET
01111 ;
01112 ; Routine to find a spare HIT entry
01113 ;
220A 3E28 01114 SPRHIT LD A,28H ;Start scan here
220C CD1F18 01115 CALL @SCNHIT ;Call to SYSRES
220F C9 01116 RET
01117 ;
01118 ; Routine to rename a filespec/devspec
01119 ;
2210 3E18 01120 REN0 LD A,18H
2212 322320 01121 LD (WASMAT),A
2215 B7 01122 OR A ;Denote "file not in dir
2216 C9 01123 RET
2217 CD6615 01124 RENAME CALL LNKFCB@ ;Save regs & link to IX
221A DD7E00 01125 LD A,(IX+0) ;If a device, use the
221D D62A 01126 SUB '*' ; "device" routine
221F 2879 01127 JR Z,RENDEV
2221 FEA8 01128 CP 'R'!80H-'*' ;Special open condition?
2223 28EB 01129 JR Z,REN0 ;Go if so
2225 E5 01130 PUSH HL ;Save new pointer
2226 217C00 01131 LD HL,SFLAG$ ;Set don't test flags
2229 CBC6 01132 SET 0,(HL)
222B CD611F 01133 CALL OPEN1 ;Open the "old" spec
222E E1 01134 POP HL
222F C0 01135 RET NZ ;Exit on error
2230 DD7E01 01136 LD A,(IX+1) ;Make sure user has
2233 E607 01137 AND 7 ; permission to rename
2235 FE03 01138 CP 3
2237 3804 01139 JR C,REN1
2239 3E25 01140 LD A,25H ;"Illegal access...
223B B7 01141 OR A
223C C9 01142 RET
01143 ;
01144 ; User has access to rename - locate drivespec
01145 ;
223D E5 01146 REN1 PUSH HL ;Save start
223E 7E 01147 REN2 LD A,(HL) ;P/u char of new spec
223F 23 01148 INC HL
2240 FE0D 01149 CP CR
2242 2808 01150 JR Z,REN3 ;Go on ENTER
2244 FE03 01151 CP 3
2246 2804 01152 JR Z,REN3 ;Go on ETX
2248 FE3A 01153 CP ':'
224A 20F2 01154 JR NZ,REN2 ;Loop on colon
224C 2B 01155 REN3 DEC HL ;Backup to where the
224D 363A 01156 LD (HL),':' ; colon should go
224F 23 01157 INC HL ; & force the drivespec
2250 DD7E06 01158 LD A,(IX+6) ; to the same as "old"
2253 4F 01159 LD C,A ;Keep drive spec in C
2254 E607 01160 AND 7
2256 C630 01161 ADD A,'0' ;Make it an ASCII digit
2258 77 01162 LD (HL),A
2259 23 01163 INC HL
225A 360D 01164 LD (HL),CR
225C DD4607 01165 LD B,(IX+7) ;Get DEC
225F DDE1 01166 POP IX ;Put "new" FCB into IX
2261 C5 01167 PUSH BC ; & save DEC & drive
2262 217C00 01168 LD HL,SFLAG$ ;Set don't test flags
2265 CBC6 01169 SET 0,(HL)
2267 CD611F 01170 CALL OPEN1 ;Open the "new" spec
226A C1 01171 POP BC
226B 2004 01172 JR NZ,REN4 ;Should error here
226D 3E13 01173 REN3A LD A,19 ; or else return
226F B7 01174 OR A ; if "new" is existing
2270 C9 01175 RET ; & we opened it
2271 FE18 01176 REN4 CP 24 ;If not "file not found"
2273 C0 01177 RET NZ ; then is error
2274 CDBB18 01178 CALL @DIRRD ;Read "old's" directory
2277 C0 01179 RET NZ
2278 C5 01180 PUSH BC ;Save drive spec
2279 54 01181 LD D,H ;Xfer buffer hi
227A 7D 01182 LD A,L
227B C605 01183 ADD A,5 ;Pt to filename field
227D 5F 01184 LD E,A ;Set buffer lo
227E 21C622 01185 LD HL,NAME$EXT ;Point to where the
2281 010B00 01186 LD BC,11 ; new name is stored
2284 EDB0 01187 LDIR ;Move in new name
2286 C1 01188 POP BC
2287 CD0318 01189 CALL @DIRWR ;Rewrite the directory
228A CC9718 01190 CALL Z,@HITRD ;Read the HIT
228D C0 01191 RET NZ
228E 54 01192 LD D,H ;Set the buffer hi
228F 58 01193 LD E,B ;Set the exact HIT lo
2290 21C622 01194 LD HL,NAME$EXT ;This doesn't change C
2293 CD1E1E 01195 CALL HASHNAME ;Hash the new name
2296 12 01196 LD (DE),A ;Stuff code into HIT
2297 C39818 01197 JP @HITWR ;Rewrite & exit
01198 ;
01199 ; Routine to rename a device
01200 ;
229A E5 01201 RENDEV PUSH HL ;Save new pointer
229B CD591E 01202 CALL GETDCB ;Locate old in tables
229E DDE1 01203 POP IX ;Recover pointer to "new"
22A0 C0 01204 RET NZ ;Back if not in tables
22A1 7D 01205 LD A,L
22A2 FE31 01206 CP DCBKL$ ;Ck if protected device
22A4 3E28 01207 LD A,40 ;"Protected system device
22A6 D8 01208 RET C
22A7 DD7E00 01209 LD A,(IX+0) ;"new" must be a device
22AA FE2A 01210 CP '*'
22AC 20BF 01211 JR NZ,REN3A ;"illegal file name...
22AE E5 01212 PUSH HL ;Save address of "old"
22AF CD591E 01213 CALL GETDCB ;Ck if "new" is unused
22B2 E1 01214 POP HL ;Rcvr address of "old"
22B3 28B8 01215 JR Z,REN3A
22B5 010600 01216 LD BC,6 ;Point to name field
22B8 09 01217 ADD HL,BC ; of "old" device
22B9 73 01218 LD (HL),E ;Stuff new name into
22BA 23 01219 INC HL ; device control block
22BB 72 01220 LD (HL),D
22BC AF 01221 XOR A ;Set Z-flag
22BD C9 01222 RET
01223 ;
01224 ; Parameter storage area
01225 ;
01226 IF @BLD631
01227 ELSE
01228 FILEHASH DS 1
01229 ENDIF
22BE 01230 PSWDBUF DS 8
22C6 01231 NAME$EXT DS 8
22CE 01232 FILE$EXT DS 3
22D1 01233 PW$HASH1 DS 2
22D3 01234 PW$HASH2 DS 2
22D5 0000 01235 DW 0 ;ERN init
22D7 00 01236 DIR$INIT DB 0,0,0,0
00 00 00
01237 IF @BLD631
22DB 01238 LAST EQU $
22DB 01239 LREC$ DS 1 ;<631>
22DC 01240 FILEHASH DS 1 ;<631>
01241 ELSE
01242 LREC$ DS 1
01243 LAST EQU $
01244 ENDIF
01245 IFGT $,DIRBUF$
01246 ERR 'Module too big'
01247 ENDIF
23FE 01248 ORG MAXCOR$-2
23FE DB04 01249 DW LAST-SYS2 ;Overlay length
01250 ;
1E00 01251 END SYS2
1E00 is the transfer address
00000 Total errors
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