IBM XT 5160

DR I VE TYPE TABLE
ASSUME CS :CODE,DS :DATA ,ES :DATA
THROUGHOUT THE 0 I SKETTE B I OS, THE FOLLOW I NG I NFORMAT ION I S CONTA I NED IN
THE FOLLOW I NG MEMORY LOCAT IONS AND REG I STERS. NOT ALL 0 I SKETTE B I OS
FUNCT IONS REQU I RE ALL OF THESE PARAMETERS.
5-25
I»~> ENTRY POINT FOR ORG OEC59H
; I NTERRUPTS BACK ON
; USER REG I STER
USER REG I STER
HEAD "
DR I VE , OR USER REG I STER
BUFFER OFFSET PARAMETER OR REG I STER
TRACK
'-SECTOR , OR USER REG I STER
BP => PARAMETER LIST DEP. ON AH
~~~! I] : ~~~6~R,'
[BP +2 ] = BUFFER OFF SET
FOR RETURN OF DR I VE PARAMETERS I
CLI[BP] = BITS 7&6 HI BITS OF MAX CYL
BITS 0-5 MAX SECTORS/TRACK
~~n~~:H : ~~~S\~~T; ~F MAX CYL.
: ~~~I~~:;I : r::I::: :N::~~:E:MOS TYPE
; DHI BP+5 = MAX HEAD ,
; 0
II BP+6 = OFFSET TO 0 I SK BASE
; BUFFER SEGMENT PARM OR USER REG I STER
; USER REG I STERS
; SEGMENT OF B I
OS OATA AREA TO OS
; CHECK FOR > LARGEST FUNCTI ON
; FUNCTION OK ,
;
REPLACE WITH KNOWN I NVAL I 0 FUNCT I ON
RESET OR STATUS ?
IF RESET OR STATUS DRIVE ALWAYS OK
READ DR I VE PARMS ?
I F SO DR I VE CHECKED LATER
DR I VES 0, 1 ,2 AND 3 OK
I F 0 OR 1 THEN JUMP
REPLACE WITH KNOWN I NV AL I 0 FUNCT I ON
CL = FUNCT I ON
CX = FUNCT I ON
FUNCTI ON TIMES 2
LOAD START OF FUNCTION TABLE
ADD OFFSET I NTO TABLE => ROUTI NE
AX = HEAD ',' OF SECTORS OR DASD TYPE
OX = DRIVE'
S I = HEAD ',' OF SECTORS OR DASD TYPE
01 = DRIVE'
LOAD STATUS TO AH FOR STATUS FUNCTION
INITIALIZE FOR ALL OTHERS
1-3
01-10-86
SRT=D, HD UNLOAD=OF - 1 ST SPEC I FY BYTE
HD LOAD= 1, MODE=DMA - 2ND SPEC I FY BYTE
WA ITT I ME AFTER OPERAT I ON TILL MOTOR OFF
512 BYTES I SECTOR
EOT (
LAST SECTOR ON TRACK)
GAP LENGTH
DTL
GAP LENGTH FOR FORMAT
FILL BYTE FOR FORMAT
HEAD SETTLE T I ME (M I LL I SECONDS)
MOTOR START T I ME (I 18 SECONDS l
MAX. TRACK NUMBER
DATA TRANSFER RATE
DISKETTE (01/10/86)
7FH
80H
01 : DRI VE ,
CL,AH
CH,CH
CL,I
BX, OFFSET FNC TAB
BX,CX -
AH,DH
DH,DH
S I ,AX
DI,DX
AH,ClDSKETTE STATUS
ClDSKETTE_STATUS, 0
AH,I
OK DRV
AH~8
OK DRV
DL~3
OK DRV
AH~14H
OS
SI
DDS
AH, (FNC TAE-FNC TAB) 12
OK FUNC- -
AH~14H
PROC FAR
BP
01
OX
BX
CX
BP,SP
01 SK INT 1
DSKETTE SETUP
DISKETTE 10 1
NEC OUTPUT -
RESULTS
SEEK
DDS:NEAR
01 SK BASE:NEAR
WAITF:NEAR
MD TBL 1: NEAR
MD-TBL2: NEAR
MD-TBL3: NEAR
MD-TBL4: NEAR
MD-TBL5: NEAR
MD:TBL6: NEAR
EQU
EQU
STRUC
DB
DB
DB
DB
DB
DB
DB
DB
DB
DB
DB
DB
DB
ENDS
MOV
XOR
SHL
MOV
ADD
MOV
XOR
MOV
MOV
MOV
MOV
PUSH
PUSH
CALL
CMP
JB
MOV
OK FUNC:
- CMP
JBE
CMP
JZ
CMP
JBE
MOV
DISKETTE 10 1
STI-
PUSH
PUSH
PUSH
PUSH
PUSH
MOV
EXTRN
EXTRN
EXTRN
EXTRN
EXTRN
EXTRN
EXTRN
EXTRN
EXTRN
CODE
SEGMENT BYTE PUBL I C
PUBLIC
PUBLIC
PUBLIC
PUBLIC
PUBLIC
PUBLIC
. ----------------------------------------------------------------
DR_TYPE LABEL BYTE
DB 0 1 ; DR I VE TYPE, MED I A TABLE
OW OFFSET MD TBL 1
DB
02+B I T70N-
OW OFFSET MD TBL2
DB 02 -
OW OFFSET MD TBL3
DB 03 -
OW OFFSET MD TBL4
DB 04+B I T70N-
OW OFFSET MD TBL5
DB 04 -
OW OFFSET MD_TBL6
DR TYPE E =1 ; END OF TABLE
DR:CNT - EQU (DR_TYPE_E-DR_TYPEl/3; NUMBER OF DRIVE TYPES
PAGE
MD STRUC
MD-SPEC 1
MD-SPEC2
MD-OFF TIM
MD-BYT-SEC
MD-SEC-TRK
MD-GAP-
MD-DTL
MD-GAP3
MD-F IL BYT
MD-HD TIM
MD-STR TIM
MD-MAX-TRK
MD-RATE
MD:STRUC
BIT70FF
BIT70N
215
216
217
218
0000
219 0001
220 0002
221 0003
222 0004
223 0005
224 0006
225 0007
226 0008
227 0009
228 OOOA
229 OOOB
230 OOOC
231 0000
232
233 = 007F
234 = 0080
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
0000
254
255
256
257
258
259
260
0000
261 0000 01
262 0001 0000 E
263 0003 82
264 0004 0000 E
265 0006 02
266 0007 0000 E
267 0009 03
268 OOOA 0000 E
269 OOOC 84
270 0000 0000 E
271 OOOF 04
272 00100000 E
273 = 0012
274 = 0006
275
276
0012
277 0012 FB
278 0013 55
279 0014 57
280 0015 52
281 0016 53
282 0017 51
283 0018 8B EC
284
285
286
287
288
289
290
291
292
293
294
295
296
297 001A IE
298 001 B 56
299 001 C E8 0000 E
300 001 F 80 FC 19
301 0022 72 02
302 0024 B4 14
303 0026
304 0026 80 FC 01
305 0029 76 OC
306 002B 80 FC 08
307 002E 74 07
308 0030 80 FA 03
309 0033 76 02
310 0035 B4 14
311 0037
312 0037 8A CC
313 0039 32 ED
314 003B DO EI
315 0030 BB 0060 R
316 0040 03 09
317 0042 8A E6
318 0044 32 F6
319 0046 8B FO
320 0048 8B FA
321 004A 8A 26 0041 R
322 004E C6 06 0041 R 00
323
324
325
326
327
328
I BM Persona I Computer MACRO Assemb I er Vers i on 2.00
DSKETTE - - 01 110/86 0 I SKETTE ADAPTER B I OS