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[MS-DOS.git] / v4.0 / src / CMD / FORMAT / FORPROC.ASM
1 ; SCCSID = @(#)forproc.asm 1.2 85/07/25
2 ;\ f
3 .xlist
4 .xcref
5 BREAK MACRO subtitle
6 SUBTTL subtitle
7 PAGE
8 ENDM
9
10 INCLUDE FORCHNG.INC
11 INCLUDE SYSCALL.INC
12 INCLUDE FOREQU.INC
13 INCLUDE FORMACRO.INC
14 INCLUDE FORSWTCH.INC
15 INCLUDE IOCTL.INC
16 .cref
17 .list
18 data segment public para 'DATA'
19 data ends
20
21 code segment public para 'CODE'
22 assume cs:code,ds:data
23
24 PUBLIC FormatAnother?,Yes?,REPORT,USER_STRING
25 public fdsksiz,badsiz,syssiz,datasiz,biosiz
26 public AllocSize,AllocNum
27
28 extrn std_printf:near,crlf:near,PrintString:near
29 extrn Multiply_32_Bits:near
30 extrn AddToSystemSize:near
31
32 data segment public para 'DATA'
33 extrn driveLetter:byte
34 extrn msgInsertDisk:byte
35 extrn msgFormatAnother?:byte
36 extrn msgTotalDiskSpace:byte
37 extrn msgSystemSpace:byte
38 extrn msgBadSpace:byte
39 extrn msgDataSpace:byte
40 extrn Read_Write_Relative:byte
41 extrn msgAllocSize:byte
42 extrn MsgAllocNum:Byte
43 extrn deviceParameters:byte
44 extrn bios:byte
45 extrn dos:byte
46 extrn command:byte
47 extrn Serial_Num_Low:Word
48 extrn Serial_Num_High:Word
49 extrn msgSerialNumber:Byte
50 extrn SwitchMap:Word
51
52
53 extrn inbuff:byte
54
55 fdsksiz dd 0
56
57 syssiz dd 0
58 biosiz dd 0
59
60 badsiz dd 0
61
62 datasiz dd 0
63
64 AllocSize dd 0 ; ;AN000;
65 AllocNum dw 0 ; ;AN000;
66 dw offset driveLetter
67 data ends
68
69 FormatAnother? proc near
70 ; Wait for key. If yes return carry clear, else no. Insures
71 ; explicit Y or N answer.
72 Message msgFormatAnother? ; ;AC000;
73 CALL Yes?
74 JNC WAIT20
75 JZ WAIT20
76 CALL CRLF
77 JMP SHORT FormatAnother?
78 WAIT20: ; ;AC000;
79 RET ; ;AC000;
80 FormatAnother? endp
81
82 ;*****************************************************************************
83 ;Routine name:Yes?
84 ;*****************************************************************************
85 ;
86 ;Description: Validate that input is valid Y/N for the country dependent info
87 ; Wait for key. If YES return carry clear,else carry set.
88 ; If carry is set, Z is set if explicit NO, else key was not Yes or No.
89 ;
90 ;Called Procedures: Message (macro)
91 ; User_String
92 ;
93 ;Change History: Created 4/32/87 MT
94 ;
95 ;Input: None
96 ;
97 ;Output: CY = 0 Yes is entered
98 ; CY = 1, Z = No
99 ; CY = 1, NZ = other
100 ;
101 ;Psuedocode
102 ;----------
103 ;
104 ; Get input (CALL USER STRING)
105 ; IF got character
106 ; Check for country dependent Y/N (INT 21h, AX=6523h Get Ext Country)
107 ; IF Yes
108 ; clc
109 ; ELSE (No)
110 ; IF No
111 ; stc
112 ; Set Zero flag
113 ; ELSE (Other)
114 ; stc
115 ; Set NZ
116 ; ENDIF
117 ; ENDIF
118 ; ELSE (nothing entered)
119 ; stc
120 ; Set NZ flag
121 ; ENDIF
122 ; ret
123 ;*****************************************************************************
124
125 Procedure YES? ; ;AN000;
126
127 call User_String ;Get character ; ;
128 ; $IF NZ ;Got one if returned NZ ;AC000;
129 JZ $$IF1
130 mov al,23h ;See if it is Y/N ;AN000;
131 mov dl,[InBuff+2] ;Get character ;AN000;
132 DOS_Call GetExtCntry ;Get country info call ;AN000;
133 cmp ax,Found_Yes ;Which one? ;AC000;
134 ; $IF E ;Got a Yes ;AC000;
135 JNE $$IF2
136 clc ;Clear CY for return ;AN000;
137 ; $ELSE ;Not a Yes ;AN000;
138 JMP SHORT $$EN2
139 $$IF2:
140 cmp ax,Found_No ;Is it No? ;AC000;
141 ; $IF E ;Yep ;AN000;
142 JNE $$IF4
143 stc ;Set CY for return ;AC000;
144 ; $ELSE ;Something else we don't want ;AN000;
145 JMP SHORT $$EN4
146 $$IF4:
147 xor al,al ;Set NZ flag for ret ;AC000;
148 cmp al,1 ; " " " " ;AC000;
149 stc ;And CY flag for good measure ;AN000;
150 ; $ENDIF ; ;AN000;
151 $$EN4:
152 ; $ENDIF ; ;AN000;
153 $$EN2:
154 ; $ELSE ;No char found at all ;AN000;
155 JMP SHORT $$EN1
156 $$IF1:
157 xor al,al ;Set NZ flag for ret ;AN000;
158 cmp al,1 ; " " " " ;AN000;
159 stc ;And CY flag for good measure ;AN000;
160 ; $ENDIF ; ;AN000;
161 $$EN1:
162 ret ; ; ;
163
164 Yes? endp ; ;AN000;
165
166
167 USER_STRING:
168 ; Get a string from user. Z is set if user typed no chars (imm CR)
169 ; We need to flush a second time to get rid of incoming Kanji characters also.
170 MOV AX,(STD_CON_INPUT_FLUSH SHL 8) + 0 ; Clean out input
171 INT 21H
172 MOV DX,OFFSET INBUFF
173 MOV AH,STD_CON_STRING_INPUT
174 INT 21H
175 MOV AX,(STD_CON_INPUT_FLUSH SHL 8) + 0 ; Clean out input
176 INT 21H
177 CMP BYTE PTR [INBUFF+1],0
178 RET
179
180 ;*********************************************
181 ; Make a status report including the following information:
182 ; Total disk capacity
183 ; Total system area used
184 ; Total bad space allocated
185 ; Total data space available
186 ; Number of allocation units
187 ; Size of allocation units
188
189 REPORT:
190 call crlf
191
192 call Calc_System_Space ;an013; dms;calc system space
193 call Calc_Total_Addressible_Space ;an013; dms;calc total space
194
195 Message msgTotalDiskSpace ; ;AC000;
196 ;call std_printf
197 cmp WORD PTR SYSSIZ,0
198 JNZ SHOWSYS
199 cmp WORD PTR SYSSIZ+2,0
200 JZ CHKBAD
201 SHOWSYS:
202 Message msgSystemSpace ; ;AC000;
203 ;CALL std_printf ;Report space used by system
204 CHKBAD:
205 cmp WORD PTR BADSIZ,0
206 JNZ SHOWBAD
207 cmp WORD PTR BADSIZ+2,0
208 JZ SHOWDATA
209 SHOWBAD:
210 Message msgBadSpace ; ;AC000;
211 ;call std_printf
212 SHOWDATA:
213
214
215 MOV CX,WORD PTR Fdsksiz
216 MOV BX,WORD PTR Fdsksiz+2
217 SUB CX,WORD PTR BADSIZ
218 SBB BX,WORD PTR BADSIZ+2
219 SUB CX,WORD PTR SYSSIZ
220 SBB BX,WORD PTR SYSSIZ+2
221 MOV word ptr datasiz,CX
222 MOV word ptr datasiz+2,BX
223 Message msgDataSpace ; ;AC000;
224 ;call std_printf
225
226 call crlf ; ;AN000;
227 mov ax,deviceParameters.DP_BPB.BPB_BytesPerSector ; ;AN000;
228 mov cl,deviceParameters.DP_BPB.BPB_SectorsPerCluster ; ;AN000;
229 xor ch,ch ; ;AN000;
230 mul cx ;Get bytes per alloc ;AN000;
231
232 mov word ptr AllocSize,ax ;Save allocation size ;AN000;
233 mov word ptr AllocSize+2,dx ; for message ;AN000;
234 Message msgAllocSize ;Print size of cluster ;AN000;
235 call Get_Free_Space ;an013; dms;get disk space
236
237 mov word ptr AllocNum,bx ;Put result in msg ;AN000;
238 Message msgAllocNum ; = cluster/disk ;AN000;
239 call crlf ; ;AN000;
240 test switchmap, SWITCH_8 ;If 8 tracks, don't display ;AN027;
241 jnz NOSERIALNUMBER ;serial number ;AN027;
242 Message msgSerialNumber ;Spit out serial number ;AN000;
243 call crlf ;
244 NOSERIALNUMBER: ;AN027;
245 RET ;
246
247 ;*****************************************************************************
248 ;Routine name: Read_Disk
249 ;*****************************************************************************
250 ;
251 ;description: Read in data using Generic IOCtl
252 ;
253 ;Called Procedures: None
254 ;
255 ;
256 ;Change History: Created 5/13/87 MT
257 ;
258 ;Input: AL = Drive number (0=A)
259 ; DS:BX = Transfer address
260 ; CX = Number of sectors
261 ; Read_Write_Relative.Start_Sector_High = Number of sectors high
262 ; DX = logical sector number low
263 ;
264 ;Output: CY if error
265 ; AH = INT 25h error code
266 ;
267 ;Psuedocode
268 ;----------
269 ; Save registers
270 ; Setup structure for function call
271 ; Read the disk (AX=440Dh, CL = 6Fh)
272 ; Restore registers
273 ; ret
274 ;*****************************************************************************
275
276 Procedure Read_Disk ; ;AN000;
277
278 ;This is setup for INT 25h right;AN000;
279 ;Change it to Read relative sect;AN000;
280 push bx ;Save registers ;AN000;
281 push cx ; ;AN000;
282 push dx ; ;AN000;
283 push si ; ;AN000;
284 push di ; ;AN000;
285 push bp ; ;AN000;
286 push es ; ;AN000;
287 push ds ;
288 mov si,data ; ;AN000;
289 mov es,si ; ;AN000;
290
291 assume es:data,ds:nothing ; ;AN000;
292
293 mov es:Read_Write_Relative.Buffer_Offset,bx ;Get transfer buffer add;AN000;
294 mov bx,ds ; ;AN000;
295 mov es:Read_Write_Relative.Buffer_Segment,bx ;Get segment ;AN000;
296 mov bx,data ;Point DS at parameter list ;AN000;
297 mov ds,bx ; ;AN000;
298
299 assume ds:data,es:data
300
301 mov Read_Write_Relative.Number_Sectors,cx ;Number of sec to read ;AN000;
302 mov Read_Write_Relative.Start_Sector_Low,dx ;Start sector ;AN000;
303 mov bx,offset Read_Write_Relative ; ;AN000;
304 mov cx,0FFFFh ;Read relative sector ;AN000;
305 INT 25h ;Do the read ;AN000;
306 pop dx ;Throw away flags on stack ;AN000;
307 pop ds ;
308 pop es ; ;AN000;
309 pop bp ; ;AN000;
310 pop di ; ;AN000;
311 pop si ; ;AN000;
312 pop dx ;Restore registers ;AN000;
313 pop cx ; ;AN000;
314 pop bx ; ;AN000;
315 ret ; ;AN000;
316
317
318 Read_Disk endp ; ;AN000;
319
320 ;*****************************************************************************
321 ;Routine name: Write_Disk
322 ;*****************************************************************************
323 ;
324 ;description: Write Data using Generic IOCtl
325 ;
326 ;Called Procedures: None
327 ;
328 ;
329 ;Change History: Created 5/13/87 MT
330 ;
331 ;Input: AL = Drive number (0=A)
332 ; DS:BX = Transfer address
333 ; CX = Number of sectors
334 ; Read_Write_Relative.Start_Sector_High = Number of sectors high
335 ; DX = logical sector number low
336 ;
337 ;Output: CY if error
338 ; AH = INT 26h error code
339 ;
340 ;Psuedocode
341 ;----------
342 ; Save registers
343 ; Setup structure for function call
344 ; Write to disk (AX=440Dh, CL = 4Fh)
345 ; Restore registers
346 ; ret
347 ;*****************************************************************************
348
349 Procedure Write_Disk ; ;AN000;
350
351
352 ;This is setup for INT 26h right
353 ;Change it to Read relative sect
354
355 push bx ;Save registers ;AN000;
356 push cx ; ;AN000;
357 push dx ; ;AN000;
358 push si ; ;AN000;
359 push di ; ;AN000;
360 push bp ; ;AN000;
361 push es ; ;AN000;
362 push ds ;
363 mov si,data ; ;AN000;
364 mov es,si ; ;AN000;
365
366 assume es:data,ds:nothing ; ;AN000;
367
368 mov es:Read_Write_Relative.Buffer_Offset,bx ;Get transfer buffer add;AN000;
369 mov bx,ds ; ;AN000;
370 mov es:Read_Write_Relative.Buffer_Segment,bx ;Get segment ;AN000;
371 mov bx,data ;Point DS at parameter list ;AN000;
372 mov ds,bx ; ;AN000;
373
374 assume ds:data,es:data
375
376 mov Read_Write_Relative.Number_Sectors,cx ;Number of sec to write ;AN000;
377 mov Read_Write_Relative.Start_Sector_Low,dx ;Start sector ;AN000;
378 mov bx,offset Read_Write_Relative ; ;AN000;
379 mov cx,0FFFFh ;Write relative sector ;AN000;
380 INT 26h ;Do the write ;AN000;
381 pop dx ;Throw away flags on stack ;AN000;
382 pop ds ; ;AN000;
383 pop es ; ;AN000;
384 pop bp ; ;AN000;
385 pop di ; ;AN000;
386 pop si ; ;AN000;
387 pop dx ;Restore registers ;AN000;
388 pop cx ; ;AN000;
389 pop bx ; ;AN000;
390 ret ; ;AN000;
391
392 Write_Disk endp ; ;AN000;
393
394 ;=========================================================================
395 ; Calc_Total_Addressible_Space : Calculate the total space that is
396 ; addressible on the the disk by DOS.
397 ;
398 ; Inputs : none
399 ;
400 ; Outputs : Fdsksiz - Size in bytes of the disk
401 ;=========================================================================
402
403 Procedure Calc_Total_Addressible_Space ;an013; dms;
404
405 push ax ;an013; dms;save affected regs
406 push dx ;an013; dms;
407 push bx ;an013; dms;
408
409 call Get_Free_Space ;an013; dms;get free disk space
410
411 push bx ;an013; dms;save avail. cluster
412 push dx ;an013; dms;save total. cluster
413
414 mov ax,dx ;an013; dms;get total clusters
415
416 xor bx,bx ;an013; dms;clear bx
417 xor cx,cx ;an013; dms;clear cx
418 mov cl,DeviceParameters.DP_BPB.BPB_SectorsPerCluster ;an013; dms;get total sectors
419 call Multiply_32_Bits ;an013; dms;multiply
420
421 xor cx,cx ;an013; dms;clear cx
422 mov cx,DeviceParameters.DP_BPB.BPB_BytesPerSector ;an013; dms;get total bytes
423 call Multiply_32_Bits ;an013; dms; multiply
424
425 mov word ptr Fdsksiz,ax ;an013; dms;save high word
426 mov word ptr Fdsksiz+2,bx ;an013; dms;save low word
427
428 pop dx ;an000; dms;get total clusters
429 pop bx ;an000; dms;get avail clusters
430
431 mov ax,dx ;an013; dms;get total clusters
432 sub ax,bx ;an013; dms;get bad clusters
433
434 xor bx,bx ;an013; dms;clear bx
435 xor cx,cx ;an013; dms;clear cx
436 mov cl,DeviceParameters.DP_BPB.BPB_SectorsPerCluster ;an013; dms;get total sectors
437 call Multiply_32_Bits ;an013; dms;multiply
438
439 xor cx,cx ;an013; dms;clear cx
440 mov cx,DeviceParameters.DP_BPB.BPB_BytesPerSector ;an013; dms;get total bytes
441 call Multiply_32_Bits ;an013; dms; multiply
442
443 sub ax,word ptr syssiz ;an013; dms;account for system
444 sbb bx,word ptr syssiz+2 ;an013; dms;size
445
446 mov word ptr Badsiz,ax ;an013; dms;save high word
447 mov word ptr Badsiz+2,bx ;an013; dms;save low word
448
449 pop bx ;an013; dms;
450 pop dx ;an013; dms;restore regs
451 pop ax ;an013; dms;
452
453 ret ;an013; dms;
454
455 Calc_Total_Addressible_Space endp ;an013; dms;
456
457
458 ;=========================================================================
459 ; Get_Free_Space : Get the free space on the disk.
460 ;
461 ; Inputs : none
462 ;
463 ; Outputs : BX - Available space in clusters
464 ; DX - Total space in clusters
465 ;=========================================================================
466
467 Procedure Get_Free_Space ;an013; dms;
468
469 xor ax,ax ;an013; dms;clear ax
470 mov ah,36h ;an013; dms;Get disk free space
471 mov dl,driveletter ;an013; dms;get drive letter
472 sub dl,"A" ;an013; dms;get 0 based number
473 inc dl ;an013; dms;make it 1 based
474 int 21h ;an013; dms;
475 ret ;an013; dms;
476
477 Get_Free_Space endp ;an013; dms;
478
479 ;=========================================================================
480 ; Calc_System_Space : This routine calculates the space occupied by
481 ; the system on the disk.
482 ;
483 ; Inputs : DOS.FileSizeInBytes
484 ; BIOS.FileSizeInBytes
485 ; Command.FileSizeInBytes
486 ;
487 ; Outputs : SysSiz - Size of the system
488 ;=========================================================================
489
490 Procedure Calc_System_Space ;an013; dms;
491
492 push ax ;an013; dms;save regs
493 push dx ;an013; dms;
494
495 mov word ptr SysSiz+0,00h ;an013; dms;clear variable
496 mov word ptr SysSiz+2,00h ;an013; dms;
497
498 mov ax,word ptr [DOS.FileSizeInBytes+0] ;an013; dms;get low word
499 mov dx,word ptr [DOS.FileSizeInBytes+2] ;an013; dms;get high word
500 call AddToSystemSize ;an013; dms;add in values
501
502 mov ax,word ptr [BIOS.FileSizeInBytes+0] ;an013; dms;get bios size
503 mov dx,word ptr [BIOS.FileSizeInBytes+2] ;an013; dms;
504 call AddToSystemSize ;an013; dms;add in values
505
506 mov ax,word ptr [COMMAND.FileSizeInBytes+0] ;an013; dms;get command size
507 mov dx,word ptr [COMMAND.FileSizeInBytes+2] ;an013; dms;
508 call AddToSystemSize ;an013; dms;add in values
509
510 pop dx ;an013; dms;restore regs
511 pop ax ;an013; dms;
512
513 ret ;an013; dms;
514
515 Calc_System_Space endp ;an013; dms;
516
517
518
519 code ends
520 end
521 \1a
The original sources of MS-DOS 1.25, 2.0, and 4.0 for reference purposes