IBM AT 5170 Technical Reference page 233

IBM Personal Computer MACRO Assembler Vers<on 2.00
1-4
TEST2 ---- 06/10/85 POST TESTS AND INITIALIZATION ROUTINES 06-10-85
0170 07
POP ES
344 0171 26: C7 06 005A 0000 MOV ES:SS TEMP.BASE LO WORD,O
345 017826: C6 06 005C 00
MOV 8YTE PTR ES: 15S-TEi:i:P.BASE HI BYTEI,O
346 017E 8E 0058 MOV SI,SS TEMP - - ­
347 0181 8E 06 MOV SS,SI­
348 0183 8C FFFO
MOV SP,MAX_SEG_LEN-2
349
350 DATA SEGMENT TO SYSTEM DATA AREA
351
352 0186 6A 18
PUSH BYTE PTR RSDA PTR
POINT TO DATA AREA
353 0166 IF
POP
05 ­
354
355 0169 BO 80
OOV AL, PAR I TY CHECK SET CHECK PAR I TY
356 018B E6 87
OUT
DMA_PAGE+6,AL SAVE WH I CH CHECK TO USE
351
358
PR I NT 64 K BYTES OK
359
360 0160 B8 0040
OOV AX,64
STARTING AMOUNT OF MEMORY OK
361 0190 E8 099F R CALL
PRT _OK
POST 65K OK MESSAGE
362
363
GET THE MEMORY SIZE DETERM I NED
I
PREPARE 8X AND OX FOR BAD CMOS 1
364
365 0193 88 B081
MOV AX, ICMOS U M
5
LO+NM11-H+CMOS U M
5
HI+NMI
366 0196 E8 0000 E CAll CMOS READ - - - HIGH BYTE­
367 019986 EO
XCHG AH,A[ SAVE HIGH BYTE
368 0198 E8 0000 E
CALL CMOS READ LOW 8YTE
369 019E 8B
IE
0013 R MOV 8X,Q!lMEMORY SIZE LOAD THE BASE MEMORY SIZE
370 0lA2 8B 03 MOV DX,eX - SAVE BASE MEMORY SizE
371 0lA4 03 08 ADD BX,AX SET TOTAL MEMORY SIZE
312
373
1-----
I S CMOS GOOD 7
314
375 0lA6 BO 8E
OOV AL, CMOS 0 I AG+NM I DETERMJNE THE CONDITION OF CMOS
376 0lA8 E8 0000 E
CALL CMOS_READ GET THE CMOS STATUS
311
376 0lA8 A8 CO
TEST AL,BAD BAT+BAO CKSUM
CMOS OK
7
379 OIAD 74 02
J,
E20BO - -
GO I F YES
380 OlAF EB 5B
JMP SHORT E20C
DEFAULT IF NOT
381
382
GET THE BASE 0->640K MEMORY SIZE FROM CONFIGURATION IN CMOS
383 OIBI E20BO:
384 OIBI B8 9596 MOV AX, (CMOS B M S LO+NM I) -H+CMOS 8 M 5 HI +NM I
385 0184 E8 0000 E CALL CMOS READ - - - HIGH BYTE­
386 0187 24 3F
AND AL,03FH MASK OFF THE MANUFACTURING TEST BITS
387 018986 EO
XCHG AH,AL , SAVE HIGH BYTE
388 0lB8 E8 0000 E
CALL CMOS READ ; LOW BYTE OF 8ASE MEMORY 5 I ZE
389 0 I BE 3B DO
CMP DX,AX ; IS MEMORY SIZE GREATER THAN CONFIG?
390 0 I CO 74 13 .JZ E2081 I GO I F EQUAL
3.,
392
1-----
SET MEMORY SIZE DETERMINE NOT EQUAL TO CONFIGURATION
393
394 0lC2 50 PUSH AX SAVE AX
395
a
I C3 88 8E8E
OOV AX,X· (CMOS DIAG+NMI) ADDRESS THE STATUS BYTE
396 01C6 E8 0000 E
CALL
CMOS READ - GET THE STATUS
397 0 I C9 DC 10
OR
AL,W-MEM SIZE SET CMOS FLAG
398 0lC8 86 C4 XCHG AL.AH - SAVE AL AND GET ADDRESS
399
oleo
E8 0000 E
CALL CMOS WR I TE WRITE UPDATED STATUS
400 DIDO 58
POP
AX -
RESTORE AX
401 0101 3B DO
eMP DX,AX
I S MEMORY SIZE GREATER THAN CONF I G
7
402 0103 77 37
JA
E20C DEFAULT TO MEMORY SIZE DETERMINED
7
403 0105 E2081:
404 0105 8B 08
~OV BX,AX SET BASE MEMORY SIZE I N TOT AL REG I STER
405 0107 88 DO
~OV
DX,AX SAVE
IN
BASE SIZE REGISTER
406
401 ;~---~
CHECK MEMORY SIZE A80VE 640K FROM CONFIGURATION
408
409 0109 B8 9798 MOY AX,(CMOS EMS LO+NMII·H+(CMOS EMS HI+NMI)
410 OIDC E8 0000 E
CALL CMOS READ - - - ; HIGH-BYTE ­
411 OIDF 86 EO
XCHG AH,A[ ; SAVE HIGH BYTE
412 OIEI E8 0000 E
CALL CMOS READ ; LOW BYTE
413 01E4 88 C8 MOY CX, AX ; SAVE THE ABOVE 640K MEMORY SIZE
414 ;----- ABOVE 640K SIZE FROM MEMORY SIZE OETERM I NE
415 ;----- CX=CONFIG AX=MEMORY SIZE DETERMINE
416 01E6 88 8081
MOV
AX, (CMOS U M 5 LO+NM I I ·H+ (CMOS U M S HI +NM I I
417 0lE9 E8 0000 E CALL CMOS READ - - - ; HI GH-8YTE ­
418 OIEC 86 EO
XCHG AH,AL ; SAVE HIGH BYTE
419 OIEE E8 0000 E CALL CMOS READ ; LOW BYTE
420
WHICH IS GREATER - AX = MEMORY SIZE DETERMINE
421 ----- CX = CONFIGURATION (ABOVE 6401 BX = SIZE (BELOW 6401
422
423 0 IF 1 3B C8
eMP CX,AX ; IS CONFIGURATION EQUAL TO DETERMINED?
424 0lF3 74 OF
JZ
SET_MEMI ; GO IF EQUAL
425
426 ;----- SET MEMORY SIZE DETERMINE NOT EQUAL TO CONFIGURATION
421
426 0lF5 50
PUSH AX
SAVE AX
429
0 I F6 B8 8E8E
MOV
AX,X-(CMOS DIAG+NMII ADDRESS THE STATUS BYTE
430 0lF9 E8 0000 E
CALL CMOS READ - GET THE STATUS
431 OIFC DC 10
OR
AL.W-MEM SIZE SET CMOS FLAG
432 01FE 86 C4
XCHG
AL,AH - SAVE AL
433 0200 E8 0000 E
CALL
CMOS WR (TE UPDATE STATUS BYTE
434 0203 58
POP
AX -
RESTORE AX
435
436 0204
SET MEMI :
431 0204 38 C8
- CMP
CX,AX
IS CONFIG GREATER THAN DETERMINED?
438
0206 11 02
JA
SET MEM GO IF YES
43'
0208 88 C8
~OV CX,AX USE MEMORY SIZE DETERM I NE I F NOT
440 020A
SET MEM:
-
441
020A 03 09
ADD
BX,CX
SET TOTAL MEMORY SIZE
442 020C E20C:
443 020C 81 FA 020 I
COP DX,513 CHECK IF 8ASE MEMORY LESS 512K
444 0210 72 00
JB NO_640
GO IF YES
445
446 0212 B8 B3B3
OOV
AX,X· (CMOS INFOI28+NMII SET 640K BASE MEMORY BIT
447 0215 E8 0000 E
CALL CMOS READ GET THE CURRENT STATUS
448 0218 DC 80
OR
AL,M640K TURN ON 640K BI T IF NOT ALREADY ON
449 021A 86 C4
XCHG AL,AH
SAVE THE CURRENT DIAGNOSTIC STATUS
450 021C E8 0000 E
CALL
CMOS_WRITE RESTORE THE STATUS
451 021F
452 021F 89 IE 0017
R
OOV
WORD PTR IIKB FLAG, BX SAVE TOTAL SIZE FOR LATER TESTING
453 0223 C I EB 06
5HR
8X,6 -
D[VIDE BY 64
454 0226 48
OEC BX 1ST 64K ALREADY DONE
455 0227 C I EA 06
5HR
DX,6
DIVIDE BY 64 FOR BASE
450
TEST2
5-61