-
Notifications
You must be signed in to change notification settings - Fork 2
/
Copy pathBATCHCOM.PAS
5610 lines (5347 loc) · 165 KB
/
BATCHCOM.PAS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
program BatchCompiler;
{$I+}
{$M 65520, 0, 655360}
uses
Dos, Crt, BCHelp;
procedure ShowAllCommands;
begin
ShowCommands;
end;
const
adNumParameters = $100 + 3;
adParameters = $100 + 4;
adDosVersionPart1 = $100 + 84;
adDosVersionPart2 = $100 + 85;
adEnviron = $100 + 86;
adTextAttribute = $100 + 88;
adScreenWidth = $100 + 89;
adScreenHeight = $100 + 91;
adWriteASCIIZString = $100 + 93;
adScreenBuffer = $100 + 95;
adWriteChar = $100 + 97;
adCRLF = $100 + 99;
adDraft = $100 + 102;
adErrorProc = $100 + 104;
adCheckErrors = $100 + 106;
adExtraErrorProc = $100 + 107;
adReadKey = $100 + 109;
adCheckBreak = $100 + 111;
adDTA = $100 + 112;
adForAllFilesDo = $100 + 114;
adFileAttr = $100 + 116;
adVersionError = $100 + 118;
adFormatStr = $100 + 120;
adDraft2 = $100 + 122;
adEL = $100 + 124;
adReadVal = $100 + 125;
adForDTA = $100 + 127;
adEnvSeg = $100 + 129;
adSP = $100 + 131;
adCrtWriteChar = $100 + 133;
adCrtWriteString = $100 + 135;
adMore = $100 + 137;
adMoreLine = $100 + 138;
adOP = $100 + 139;
adMoreProc = $100 + 140;
adBreak = $100 + 142;
adHandleOutput = $100 + 144;
adWindMin = $100 + 146;
adWindMax = $100 + 148;
adActivePage = $100 + 150;
adPCopyBuffer = $100 + 151;
adInputStr = $100 + 153;
adUseCRT = $100 + 155;
adNumberFormat = $100 + 156;
adReturnAddr = $100 + 160;
opNUL = $FF;
opPRN = $05;
opAUX = $04;
opCON = $00;
const
IncludeErrMsg: Boolean = False;
IncludeFormatStr: Boolean = False;
ForAllUsed: Boolean = False;
ForInDoUsed: Boolean = False;
ReadValUsed: Boolean = False;
OverwriteFiles: Boolean = False;
IncludeMore: Boolean = False;
IncludeSaveScreen: Boolean = False;
IncludeCRTInput: Boolean = False;
CommentSet: Boolean = False;
OnLine: Boolean = True;
const
MaxLabels = 750;
MaxVars = 100;
VarPos: Word = 0;
LabelPos: Word = 0;
Lab = True;
Ref = False;
IFAddr: Word = 0;
FORAddr: Word = 0;
FORAddr2: Word = 0;
EnvLength: Word = $8192;
StackSpace: Word = $0200;
type
VarType = record
Name: string[16];
Address: Word;
end;
var
InputFile,
OutputFile: Text;
InputName,
OutputName: string[94];
CurLine, S, T, U, V: string;
PrNum, Lin: Word;
CmdDone: Boolean;
Labels: Array[1..MaxLabels] of LongInt;
LabelAddr: Array[1..MaxLabels] of Word;
LabelTp: Array[1..MaxLabels] of Boolean;
LabelLine: Array[1..MaxLabels] of Word;
Vars: Array[1..MaxVars] of VarType;
Number: Longint;
const
txVersionError: string[80] =
'DOS version 2.0 or higher required';
Comment: string[80] =
#9;
procedure StartProgramCode; assembler;
asm
jmp @StartProgram
db 00 { Number of parameters }
db 00, 00, 00, 00, 00 { Addresses of all parameters }
db 00, 00, 00, 00, 00
db 00, 00, 00, 00, 00
db 00, 00, 00, 00, 00
db 00, 00, 00, 00, 00
db 00, 00, 00, 00, 00
db 00, 00, 00, 00, 00
db 00, 00, 00, 00, 00
db 00, 00, 00, 00, 00
db 00, 00, 00, 00, 00
db 00, 00, 00, 00, 00
db 00, 00, 00, 00, 00
db 00, 00, 00, 00, 00
db 00, 00, 00, 00, 00
db 00, 00, 00, 00, 00
db 00, 00, 00, 00, 00
db 00, 00 { DOS version }
dw 0000 { Environment table }
db 07 { Text attrib }
dw 80 - 1 { Screen Width }
dw 25 - 1 { Screen Height }
dw 0000, 0000, 0000 { Write procedures }
db 0dh, 0ah, 0 { CR/LF }
dw 0000 { 255-byte draft string }
dw 0000 { procedure to handle errors }
db 01 { Check for errors }
dw 0000 { Some error messages }
dw 0000 { Read key }
db 0FFh { Check Break }
dw 0000 { DTA address }
dw 0000 { For all files do ... }
dw 0000 { File attributes }
dw 0000 { Version Error Text }
dw 0000 { FormatStr }
dw 0000 { Draft string }
db 00 { Error level }
dw 0000 { Read dec/hex value }
dw 0000 { DTA address for FOR .. IN .. DO }
dw 0000 { Environment segment }
dw 0000 { Stack Pointer }
dw 0000 { CRT Write Char }
dw 0000 { CRT Write string }
db 00 { More }
db 00 { More Line }
db 00 { NUL }
dw 0000 { --More-- }
dw 0000 { Check Ctrl-C }
dw 0000 { output to PRN/AUX/NUL }
db 0, 0, 79, 24 { Window coordinates }
db 00 { Active screen page }
dw 0000 { Buffer for screen contens }
dw 0000 { CRT input string }
db 00 { Use CRT? }
db '%Ld', 0 { Number Format }
dw 0000 { Return address after error }
@StartProgram: mov sp, [adSP]
mov ah, 0Fh
int 10h
mov [adActivePage], bh
call @GetString
db ' ', 8, '$'
@GetString: pop dx
mov ah, 9
int 21h
mov ah, 8
mov bh, [adActivePage]
int 10h
mov [adTextAttribute], ah
push es
mov ax, 0040h
mov es, ax
mov ax, 0b800h
seges
cmp Byte Ptr [0049h], 7
jnz @SBOk
mov ah, 0b0h
@SBOk: pop es
mov [adScreenBuffer], ax
mov si, 0081h
mov di, 0080h
mov dx, adParameters
mov Byte Ptr [adNumParameters], 00
@GetParams: lodsb
cmp al, ' '
jz @GetParams
cmp al, 9
jz @GetParams
cmp al, 0dh
jz @ParamsDone
dec si
inc Byte Ptr [adNumParameters]
mov ax, di
push di
mov di, dx
stosb
mov dx, di
pop di
@CopyParam: lodsb
cmp al, ' '
jz @CopyDone
cmp al, 9
jz @CopyDone
cmp al, 0dh
jz @CopyDone
stosb
jmp @CopyParam
@CopyDone: dec si
mov al, 0
stosb
jmp @GetParams
@ParamsDone: mov ax, 3000h
int 21h
or al, al
jnz @VersionOk
mov dx, [adVersionError]
@Error: mov ah, 9
int 21h
mov ax, 4c01h
int 21h
@VersionOk: mov [adDosVersionPart1], al
mov [adDosVersionPart2], ah
mov dx, [adDTA]
mov ah, 1ah
int 21h
mov ax, [002ch]
xor si, si
mov di, [adEnviron]
push ds
mov ds, ax
@CopyEnv: lodsb
stosb
or al, al
jnz @CopyEnv
cmp Byte Ptr [si], 0
jnz @CopyEnv
stosb
pop ds
mov ax, cs
add [adEnvSeg], ax
mov ah, 4Ah
mov bx, [adSP]
add bx, 10h
mov cl, 4
shr bx, cl
int 21h
xor si, si { for RETURN without GOSUB }
push si
ret
dw 1011h
end;
procedure HandleOutput; assembler;
asm
push ax
push dx
mov ah, [adOP]
or ah, ah
jz @GoBack
cmp ah, 0FFh
jz @GoBack
mov dl, al
int 21h
@GoBack: pop dx
pop ax
ret
dw 1011h
end;
procedure CheckBreak; assembler;
asm
cmp Byte Ptr [adCheckBreak], 0
jz @GoBack
push ax
mov ah, 0Bh
int 21h
pop ax
@GoBack: ret
dw 1011h
end;
procedure HandleError; assembler;
asm
mov Byte Ptr [adEL], al
cmp Byte Ptr [adCheckErrors], 0
jz @End
mov bx, [adWriteASCIIZString]
or ax, ax
jz @End
call @Start
db 0dh, 0ah, 'DOS error ', 0
@Start: pop si
push ax
call bx
pop ax
aam
add ax, 3030h
push ax
mov al, ah
call Word Ptr [adWriteChar]
pop ax
call Word Ptr [adWriteChar]
cmp Word Ptr [adExtraErrorProc], 0000
jz @NotInstalled
mov al, ':'
call Word Ptr [adWriteChar]
mov al, ' '
call Word Ptr [adWriteChar]
mov al, [adEL]
call Word ptr [adExtraErrorProc]
@NotInstalled: call @PrtLine
db '.', 0dh, 0ah, 'Continue (y/n)? ', 0
@PrtLine: pop si
call bx
@Again: call Word Ptr [adReadKey]
mov si, adCRLF
and al, 0DFh
cmp al, 'Y'
jz @Continue
cmp al, 'N'
jnz @Again
call Word Ptr [adWriteChar]
call bx
mov ax, 4c01h
int 21h
@Continue: call Word Ptr [adWriteChar]
call bx
@End: ret
dw 1011h
end;
procedure ErrorMessages; assembler;
asm
cmp al, 1
jnz @NotEr1
call @Show
db 'Invalid function number', 0
@NotEr1: cmp al, 2
jnz @NotEr2
call @Show
db 'File not found', 0
@NotEr2: cmp al, 3
jnz @NotEr3
call @Show
db 'Path not found', 0
@NotEr3: cmp al, 4
jnz @NotEr4
call @Show
db 'Too many open files', 0
@NotEr4: cmp al, 5
jnz @NotEr5
call @Show
db 'File access denied', 0
@NotEr5: cmp al, 6
jnz @NotEr6
call @Show
db 'Invalid file handle', 0
@NotEr6: cmp al, 8
jnz @NotEr8
call @Show
db 'Insufficient memory', 0
@NotEr8: cmp al, 10
jnz @NotEr10
call @Show
db 'Environment invalid', 0
@NotEr10: cmp al, 12
jnz @NotEr12
call @Show
db 'Invalid file access code', 0
@NotEr12: cmp al, 15
jnz @NotEr15
call @Show
db 'Invalid disk drive', 0
@NotEr15: cmp al, 16
jnz @NotEr16
call @Show
db 'Cannot remove current directory', 0
@NotEr16: cmp al, 17
jnz @NotEr17
call @Show
db 'Cannot rename across drives', 0
@NotEr17: cmp al, 19
jnz @NotEr19
call @Show
db 'Disk write-protected', 0
@NotEr19: cmp al, 21
jnz @NotEr21
call @Show
db 'Drive not ready', 0
@NotEr21: cmp al, 23
jnz @NotEr23
call @Show
db 'CRC error in data', 0
@NotEr23: cmp al, 25
jnz @NotEr25
call @Show
db 'Disk seek error', 0
@NotEr25: cmp al, 27
jnz @NotEr27
call @Show
db 'Sector not found', 0
@NotEr27: cmp al, 28
jnz @NotEr28
call @Show
db 'Printer out of paper', 0
@NotEr28: cmp al, 29
jnz @NotEr29
call @Show
db 'Write fault', 0
@NotEr29: cmp al, 30
jnz @NotEr30
call @Show
db 'Read fault', 0
@NotEr30: cmp al, 31
jnz @NotEr31
call @Show
db 'General failure', 0
@NotEr31: call @Show
db 8, 8, 0
@Show: pop si
call Word Ptr [adWriteASCIIZString]
@End: ret
dw 1011h
end;
procedure DOSWriteChar; assembler;
asm
cmp Byte Ptr [adOP], opCON
jz @Ok
call Word Ptr [adHandleOutput]
ret
@Ok: push ax
push dx
mov dl, al
mov ah, 02
int 21h
pop dx
pop ax
cmp al, 0Ah
jnz @NotLF
call Word Ptr [adMoreProc]
@NotLF: ret
dw 1011h
end;
procedure BIOSWriteChar; assembler;
asm
cmp Byte Ptr [adOP], opCON
jz @Ok
call Word Ptr [adHandleOutput]
ret
@Ok: push ax
push bx
mov ah, 0eh
mov bh, [adActivePage]
mov bl, [adTextAttribute]
int 10h
pop bx
pop ax
call Word Ptr [adBreak]
cmp al, 0Ah
jnz @NotLF
call Word Ptr [adMoreProc]
@NotLF: ret
dw 1011h
end;
procedure WriteASCIIZString; assembler;
asm
cmp Byte Ptr [adOP], opCON
jz @Ok
ret
@Ok: push ax
@Repeat: lodsb
or al, al
jz @End
call Word Ptr [adWriteChar]
jmp @Repeat
@End: pop ax
ret
dw 1011h
end;
procedure CRTWriteChar; assembler;
asm
cmp Byte Ptr [adOP], opCON
jz @Ok
call Word Ptr [adHandleOutput]
ret
@Ok: push ax
push bx
push cx
push dx
push di
push bp
push ax
mov ah, 3
mov bh, [adActivePage]
int 10h
pop ax
cmp al, 9
jz @Tab
cmp al, 8
jz @BS
cmp al, 7
jnz @NotBeep
mov ax, 0E07h
int 10h
jmp @Done
@NotBeep: call @WriteChar
@Done: mov ah, 2
mov bh, [adActivePage]
int 10h
call Word Ptr [adBreak]
pop bp
pop di
pop dx
pop cx
pop bx
pop ax
ret
@BS: or dl, dl
jz @Done
dec dl
jmp @Done
@Tab: mov al, ' '
call @WriteChar
test dl, 7
jnz @Tab
jmp @Done
@WriteChar: cmp al, 0Ah
jz @LF
cmp al, 0Dh
jnz @NotCr
mov dl, 0
ret
@NotCr: push ax
push dx
mov ax, [adScreenWidth]
inc ax
mul dh
mov dh, 0
add ax, dx
shl ax, 1
mov di, ax
pop dx
pop ax
mov ah, [adTextAttribute]
push es
mov es, [adScreenBuffer]
stosw
pop es
cmp dl, [adScreenWidth]
jz @NewLine
inc dl
ret
@NewLine: mov dl, 0
@LF: cmp dh, [adScreenHeight]
jnb @Scroll
inc dh
jmp @CheckLine
@Scroll: push ax
push bx
push cx
push dx
mov ax, 601h
mov bh, [adTextAttribute]
xor cx, cx
mov dl, [adScreenWidth]
mov dh, [adScreenHeight]
int 10h
pop dx
pop cx
pop bx
pop ax
@CheckLine: push ax
push bx
mov ah, 2
mov bh, [adActivePage]
int 10h
call Word Ptr [adMoreProc]
pop bx
pop ax
ret
dw 1011h
end;
procedure CRTWriteString; assembler;
asm
cmp Byte Ptr [adOP], opCON
jz @Ok
push ax
lodsb
or al, al
jz @OPDone
call Word Ptr [adHandleOutput]
@OPDone: pop ax
ret
@Ok: push di
push bp
push ax
push bx
push cx
push dx
mov ah, 3
mov bh, [adActivePage]
int 10h
@Next: lodsb
or al, al
jz @StringDone
cmp al, 9
jz @Tab
cmp al, 8
jz @BS
cmp al, 7
jnz @NotBeep
mov ax, 0E07h
int 10h
jmp @Next
@NotBeep: call @WriteChar
jmp @Next
@BS: or dl, dl
jz @Next
dec dl
jmp @Next
@StringDone: mov ah, 2
mov bh, [adActivePage]
int 10h
call Word Ptr [adBreak]
pop dx
pop cx
pop bx
pop ax
pop bp
pop di
ret
@Tab: mov al, ' '
call @WriteChar
test dl, 7
jnz @Tab
jmp @Next
@WriteChar: cmp al, 0Ah
jz @LF
cmp al, 0Dh
jnz @NotCr
mov dl, 0
ret
@NotCr: push ax
push dx
mov ax, [adScreenWidth]
inc ax
mul dh
mov dh, 0
add ax, dx
shl ax, 1
mov di, ax
pop dx
pop ax
mov ah, [adTextAttribute]
push es
mov es, [adScreenBuffer]
stosw
pop es
cmp dl, [adScreenWidth]
jz @NewLine
inc dl
ret
@NewLine: mov dl, 0
@LF: cmp dh, [adScreenHeight]
jnb @Scroll
inc dh
jmp @CheckLine
@Scroll: push ax
push bx
push cx
push dx
mov ax, 601h
mov bh, [adTextAttribute]
xor cx, cx
mov dl, [adScreenWidth]
mov dh, [adScreenHeight]
int 10h
pop dx
pop cx
pop bx
pop ax
@CheckLine: push ax
push bx
mov ah, 2
mov bh, [adActivePage]
int 10h
call Word Ptr [adMoreProc]
pop bx
pop ax
ret
dw 1011h
end;
procedure DOSReadKey; assembler;
asm
push dx
mov ah, 8
int 21h
or al, al
jnz @1
push ax
mov ah, 8
int 21h
mov dh, al
pop ax
mov ah, dh
@1: pop dx
ret
dw 1011h
end;
procedure BIOSReadKey; assembler;
asm
call Word Ptr [adBreak]
mov al, 0
int 16h
ret
dw 1011h
end;
procedure Shift; assembler;
asm
mov cl, [adNumParameters]
mov ch, 0
jcxz @End
mov si, adParameters + 1
mov di, adParameters
cld
rep movsb
dec Byte Ptr [adNumParameters]
@End: ret
dw 1011h
end;
procedure ClearScreen; assembler;
asm
call Word Ptr [adBreak]
mov ax, 0600h
mov bh, [adTextAttribute]
mov cx, [adWindMin]
mov dx, [adWindMax]
int 10h
mov dx, [adWindMin]
mov ah, 2
mov bh, [adActivePage]
int 10h
ret
dw 1011h
end;
procedure ShowBreak; assembler;
asm
call @Start
db 'BREAK is ', 0
@Start: pop si
mov bx, [adWriteASCIIZString]
call bx
mov ax, 3300h
int 21h
shl dl, 1
shl dl, 1
call @WriteOnOff
db 'off', 0
db 'on', 0
@WriteOnOff: pop si
mov dh, 0
add si, dx
call bx
mov si, adCRLF
call bx
ret
dw 1011h
end;
procedure SetBreak; assembler;
asm
mov ax, 3301h
int 21h
ret
dw 1011h
end;
procedure ShowVerify; assembler;
asm
call @Start
db 'VERIFY is ', 0
@Start: pop si
mov bx, [adWriteASCIIZString]
call bx
mov ah, 54h
int 21h
shl al, 1
shl al, 1
call @WriteOnOff
db 'off', 0
db 'on', 0
@WriteOnOff: pop si
mov ah, 0
add si, ax
call bx
mov si, adCRLF
call bx
ret
dw 1011h
end;
procedure SetVerify; assembler;
asm
mov ah, 2eh
mov al, dl
mov dh, 0
int 21h
ret
dw 1011h
end;
procedure ChangeDir; assembler;
asm
mov Byte Ptr [adEL], 0
mov [adReturnAddr], sp
mov si, dx
cld
@GetChar: lodsb
or al, al
jz @ShowDir
mov dl, al
and dl, 0dfh
lodsb
cmp al, ':'
jz @ShowDirDrive
@SetDir: mov dx, [adDraft2]
mov ah, 3bh
int 21h
jnc @DirOk
call di
@DirOk: ret
@ShowDirDrive: lodsb
or al, al
jnz @SetDir
mov al, dl
sub al, '@'
jmp @DriveKnown
@ShowDir: mov ah, 19h
int 21h
inc al
@DriveKnown: mov dl, al
push ax
mov si, [adDraft]
push si
mov ah, 47h
int 21h
jnc @NoError
call di
mov sp, [adReturnAddr]
ret
@NoError: pop si
pop ax
add al, '@'
call bx
mov al, ':'
call bx
mov al, '\'
call bx
call bp
mov si, adCRLF
call bp
ret
dw 1011h
end;
procedure SetDosVar; assembler;
asm
mov bx, ax
mov si, bx
cmp Byte Ptr [si], 0
jnz @SetVar
@ShowEnv: mov si, [adEnviron]
mov bx, [adWriteASCIIZString]
@ShowStr: cmp Byte Ptr [si], 0
jz @ShowDone
call bx
push si
mov si, adCRLF
call bx
pop si
jmp @ShowStr
@ShowDone: ret
@SetVar: mov di, si
mov cx, 0FFFFh
xor al, al
cld
repnz scasb
mov al, '='
dec di
stosb
sub di, si
mov cx, di
mov di, [adEnviron]
@Search: cmp Byte Ptr [di], 0
jz @NotFound
push cx
push si
push di
rep cmpsb
pop di
pop si
pop cx
jz @VarFound
mov al, 0
push cx
mov cx, 0FFFFh
repnz scasb
pop cx
jmp @Search
@VarFound: push cx
mov si, di
mov al, 0
mov cx, 0FFFFh
repnz scasb
xchg si, di
push si
xor cx, cx
dec si
@CountLen: lodsw
dec si
inc cx
or ax, ax
jnz @CountLen
pop si
rep movsb
pop cx
dec di
@NotFound: mov si, bx
push di
mov di, si
add di, cx
mov Byte Ptr [di - 1], 0
pop di
mov bp, dx
cmp Byte Ptr [bp], 0
jz @EndVar
dec cx
rep movsb
mov al, '='
stosb
mov si, dx
@CopyValue: lodsb
stosb
or al, al
jnz @CopyValue
@EndVar: mov al, 0
stosb
@End: call Word Ptr [adBreak]
ret
dw 1011h