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·
--
-
-
- -
------ ---- --- --- - -- - ----- -
--------
----------------- -
- ----
PRINT A SEGMENT VALUE TO LOOK LIKE A 20 BIT ADDRESS
;
OX MUST CONTAIN SEGMENT VALUE TO BE PRINTED
·
------
- - -
--- --- ---- - -- ---- ------ ------ - ---
--
--
-----------------
foRT SEG PROC
NEAR
-
MOV
AL,DH
;GET MSB
CALL
XPC BYTE
MOV
AL,DL
;LSB
CALL
XPC BYTE
MOV
AL,'O'
; PRINT A '0 '
CALL
PRT HEX
MOV
AL,' ,
; SPACE
CALL
PRT_HEX
RET
PRT_SEG ENDP
·
-- --
- - - - -
- -- -- - -- - -- - --- ---- --
---
-- ------- - -- -
--
-
------- ---- -- --
TH IS SUBROUT I NE PERFORMS A READ
1 WR I TE STORAGE TEST ON A BLOCK
;
OF STORAGE.
ENTRY REQU I REMENTS:
ES = ADDRESS OF STORAGE SEGMENT BE I NG TESTED
OS = ADDRESS OF STORAGE SEGMENT BE I NG TESTED
;
CX = WORD COUNT OF STORAGE BLOCK TO BE TESTED
EX I T PARAMETERS:
;
ZERO FLAG = 0
IF STORAGE ERROR
(DATA COMPARE OR PARITY
CHECK.
AL=O DENOTES A PAR I TY CHECK. ELSE AL=XOR' ED
;
BIT PATTERN OF THE EXPECTED DATA PATTERN VS THE ACTUAL
DATA READ.
; AX,BX,CX,DX,DI, AND
51
ARE ALL DESTROYED.
5-97
PO I NT TO LAST WORD JUST WR I TTEN
SET 0 I R FLAG TO GO BACKWARDS
INITIALIZE DESTINATION POINTER
SETUP WORD COUNT FOR LOOP
I NNER TEST LOOP
READ OLD TEST WORD FROM STORAGE
OAT A READ AS EXPECTED
?
NO -
GO TO ERROR ROUT I NE
GET NEXT DATA PATTERN TO WR I TE
WRITE INTO LOCATION JUST READ
DECREMENT WORD COUNT AND LOOP
SET 0 I R FLAG TO GO FORWARD
SET PO I NTER TO BEG LOCA T I ON
INITIALIZE DESTINATION POINTER
SETUP WORD COUNT FOR LOOP
SETUP COMPARE PATTERN OF "OAA55H".
I NNER TEST LOOP
READ OLD TEST WORD FROM STORAGE
DATA READ AS EXPECTED
?
NO -
GO TO ERROR ROUT I NE
GET NEXT DATA PATTERN TO WR I TE
WRITE INTO LOCATION JUST READ
DECREMENT WORD COUNT AND LOOP
PO I NT TO LAST WORD JUST WR I TTEN
SET 0 I R FLAG TO GO BACKWARDS
INITIALIZE DESTINATION POINTER
SETUP WORD COUNT FOR LOOP
SETUP COMPARE PATTERN "OFFFFH"
I NNER TEST LOOP
READ OLD TEST WORD FROM STORAGE
OAT A READ AS EXPECTED
?
NO -
GO TO ERROR ROUT I NE
GET NEXT DATA PATTERN TO WR ITE
WR I TE INTO LOCATION JUS TREAD
DECREMENT WORD COUNT AND LOOP
SET
0
I R FLAG TO GO FORWARD
SET PO I NTER TO BEG LOCA T I ON
INI TI ALI ZE DESTINATION POINTER
SETUP WORD COUNT FOR LOOP
SETUP COMPARE PATTERN "00101H".
INNER TEST LOOP
READ OLD TEST WORD FROM STORAGE
DATA READ AS EXPECTED
?
NO -
GO TO ERROR ROUT I NE
WR I TE ZERO INTO LOCA T I ON READ
DECREMENT WORD COUNT AND LOOP
; DECREMENT CYCLES COUNT TILL COUNT END
RESTORE (AH)
RETURN
(CX) = 0
; LOOP TILL WRAP THROUGH FF
; GET INITIAL DATA PATTERN TO WRITE
;
SET INITIAL COMPARE PATTERN.
; FILL STORAGE LOCAT IONS I N BLOCK
; TOGGLE PAR I TY CHECK LATCHES
SAVE WORD COUNT OF BLOCK TO TEST
SET 0 I R FLAG TO INCREMENT
SET 0 I =OFFSET 0 REL TO ES REG
SETUP FOR O->FF PATTERN TEST
; ON FIRST BYTE
; O.K.?
; GO ERROR I F NOT
POST (01/10/86)
1-14
01-10-86
WAITFI
AX
C3
51,01
CX,BX
AX,DX
C7X
AX,OAA55H
PROC
NEAR
BX,CX
01,01
AX,AX
01
01
l~: 'D~J
AL,AH
C7
AH
AL,AH
C2
1
AX~055AAH
DX,AX
STOSW
AL,PORT B
AL,030H-
PORT_B,AL
AL,OCFH
PORT_B,AL
01
01
C5
AX,DX
C7X
AX,00101H
C6
AX,DX
C7X
AX,OFFFFH
C4
51,01
CX,BX
DX,AX
AX,DX
C7X
01
01
51,01
CX,BX
DX,AX
01
01
51,01
CX,BX
DX,AX
MOV
MOV
XOR
JNZ
INC
MOV
JNZ
MOV
MOV
REP
IN
OR
OUT
NOP
AND
OUT
DEC
DEC
STD
MOV
MOV
LODSW
XOR
JNE
MOV
STOSW
LOOP
CLD
INC
INC
MOV
MOV
MOV
LODSW
XOR
JNE
MOV
STOSW
LOOP
DEC
DEC
STD
MOV
MOV
MOV
LODSW
XOR
JNE
MOV
STOSW
LOOP
CLD
INC
INC
MOV
MOV
MOV
LODSW
XOR
JNE
STOSW
LOOP
WAITF9:
STGTST CNT
-
MOV
CLD
SUB
SUB
LOOP
POP
RET
WAITF
ENDP
C3:
C4:
C5:
C6:
1478 OCB6 E2 EF
1479 OCB8
1480 OCB8 58
1481
OCB9 C3
1482
1483 OCBA
1484
1485
1486
1487
1488
1489 OCBA
1490 OCBA 8A C6
1491
OCBC E8
1958 R
1492 OCBF 8A C2
1493 OCC I E8 1958 R
1494 OCC4 BO 30
1495 OCC6 E8
1969 R
1496 OCC9 BO 20
1497 OCCB E8 1969 R
1498 OCCE C3
1499 OCCF
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516 OCCF
151 7 OCCF 8B 09
1518 OCDI FC
15 I 9 OCD2 2B FF
1520 OCD4 2B CO
1521 OCD6
1522 OCD6 88 05
1523 OCD8 8A 05
1524 OCDA 32 C4
1525 OCDC 75 79
1526 OCDE FE C4
1527 OCEO 8A C4
1528 OCE2 75 F2
1529 OCE4 B8 55AA
1530 OCE7 8B DO
1531
OCE9 F31 AB
1532 OCEB E4 61
1533 OCED OC 30
1534 OCEF E6 6 I
1535 OCF 1 90
1536 OCF2 24 CF
1537 OCF4 E6 61
1538
1539 OCF6 4F
1540 OCF7 4F
1541 OCF8 FD
1542 OCF9 8B F7
1543 OCFB 8B CB
1544 OCFD
1545 OCFD AD
1546 OCFE 33 C2
1547 0000 75 57
1548 0002 B8 AA55
1549 0005 AB
1550 0006 E2 F5
1551
1552 0008 FC
1553 0009 47
1554 ODOA 47
1555 ODOB 8B F7
1556 0000 8B CB
1557 ODOF 8B DO
1558 0011
1559 0011
AD
1560 0012 33 C2
1561
0014 75 43
1562 0016 B8 FFFF
1563 0019 AB
1564 00 I A E2 F5
1565
1566 ODIC 4F
1567 0010 4F
1568 ODIE FD
1569 ODIF 8B F7
1570 0021
8B CB
1571 0023 8B DO
1572 0025
1573 0025 AD
1574 0026 33 C2
1575 0028 75 2F
I 576 OD2A B8 0 I 0 1
1577 0020 AB
1578 OD2E E2 F5
1579
1580 0030 FC
1581
0031 47
1582 0032 47
1583 0033 8B F7
1584 0035 8B CB
1585 0037 8B DO
1586 0039
1587 0039 AD
1588 OD3A 33 C2
1589 OD3C 75
I B
1590 OD3E AB·
159 I OD3F E2 F8
IBM Personal Computer MACRO Assembler
Version 2.00
POST -----
01/10/86
SYSTEM POST AND BIOS PROCEDURES
- Quick Links:
- Section 1. System Board
- 64/256K System Board
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