;-----
SEE
IF
LOCATION
THAT
CAUSED
PARITY
CHECK CAN
8E
FOUND
POST
(01/10/86)
·--
--
----------------------------------------------------
;
TH
I S ROUT I NE CHECKSUMS OPT
10NAL
ROM
MODULES AND
;
IF
CHECKSUM
IS
OK,
CALLS
INIT/TEST
CODE
IN
MODULE
5-101
SET
FOR 1
6K8
SCAN
SET
S I TO
8E
REAL
TI
VE TO
START
OF
ES
READ 1
6K8
OF MEMORY
SEE I F PAR I
TY
CHECK
HAPPENED
PRINT
ROW
OF
11111
IF
PARITY
CHECK COULD NOT
8E
RE-CREATED
SET
COUNT
SAVE COUNT
ADJUST
GO
PRINT
ADDRESS
IF
IT
DID
PO I
NT
TO
NEXT
1
6K
8LOCK
PR I
NT
SEGMENT
VALUE
HALT
SYSTEM
PO I
NT
TO
NEXT
8YTE
ADD
ALL
8YTES
IN
ROS MODULE
SUM
=
01
GET
MEMORY
SIZE
WORD
SET
0 I R
FLAG
TO I NCR I MENT
POINT
OX
AT
START
OF
MEM
POST
CHECKSUM ERROR
AND
EXIT
SAVE AX REG CONTENTS
READ CURRENT
VAL
OF PORT 8
FLIP
ALL
81TS
I
SOLATE
CONTROL
81
T
MASK OUT OF
ORIGINAL
VAL
OR
NEW
CONTROL 8 I
TIN
SET
PO I NTER TO
NEXT
MODULE
RETR I VE COUNT
DO
CHECKS~M
; TOGGLE PAR I
TY
CHECK
ENA8LES
; 0 I
SA8LE.
TRAP
; PO I
NT
ES TO
DATA
AREA
; RESTORE AX REG
; RESTORE
OR
I G CONTENTS OF AX
;
HALT
SYSTEM
; SAVE PO
INTER
; ZERO OUT
AH
;
GET
LENGTH
I
NO
I CATOR
;
MULTI
PL
Y
8Y
5 12
1-18
01-10-86
'PARITY
CHECK
l'
,CR,LF
'11111'
,CR,LF
AX
AL,DS:
[8X]
8X
C26
AL,AL
DX,DS
PRT_SEG
ENDP
AL,OOH
OAOH,AL
AL,PORT
8
AL,001100008
PORT
8,AL
AL,1To011118
PORT
8,AL
8X
,CtMEMORY_
SIZE
DX,DX
DS,DX
ES,DX
CX,4000H
S I
,S
I
OX
DS:DATA
PROC NEAR
AX
AL,PORT
B
AH,AL
-
AL
AL,010000008
AH,101111118
AL,AH
PORT
8,AL
AL,EOI
INTAOO,AL
AX
ENDP
LODS8
AL,PORT
C
AL,Il0000008
PRT
NMI
DX,0400H
8X,I6D
NMI LOOP
S I
,TDFFSET
D2A)
P_MSG
08
08
8L
I NK
LED
PROCEDURE FOR
MFG
RUN-
I N
TESTS
I F
LED
I S
ON,
TURN I T
OFF.
I F
OFF,
TURN
ON.
ADD
INC
LOOP
OR
RET
~~:=:~::~:~~
----
:~~~
---------
----
---
--
---
MESSAGE AREA FOR POST
C26:
02
014:
·----------------------------------------
;
ROS
CHECKSUM SU8ROUT I NE
~~~-~~~~~~~~----~~~~----~~~~------------~
NEXT
ROS MODULE
-
MOV
CX , 0 ; NUM8ER
OF
8YTES
TO ADD
ROS CHECKSUM
CNT:
;
ENTRY
FOR OPT
10NAL
ROS
TEST
-
XOR
-
AL,AL
D2A
ASSUME
8L1NK
INT
-
STI
PUSH
IN
MOV
NOT
AND
AND
OR
OUT
MOV
OUT
POP
IRET
8LINK_INT
MOV
OUT
IN
OR
OUT
AND
OUT
MOV
CLD
SU8
NMI
LOOP:
-
MOV
MOV
MOV
SU8
REP
IN
AND
JNZ
ADD
SU8
JNZ
MOV
CALL
CLI
HLT
PRT
NMI:
-
MOV
CALL
CLI
HLT
POP
IRET
NMI_INT_'
·
---------
-------------------------------
EO
08
'101'
,CR,LF
; SYSTEM
80ARD
ERROR
El
08
'
201'
,CR,LF
; MEMORY ERROR
F3A
08
'ROM'
,CR,
LF
;
ROM
CHECKSUM ERROR
F3C
08
'1801'
,CR,LF
;
EXPANSION
10
80X
ERROR
01
08
'PARITY
CHECK
2'
,CR,LF
·--------------------------------------------------------
ROM
CHECK PROC NEAR
-
MOV
AX,DATA
MOV
ES,AX
SU8
AH,AH
MOV
AL,
[8X+2]
MOV
CL,09H
SHL
AX
,CL
MOV
CX,AX
PUSH CX
MOV
CX,4
SHR
AX,CL
ADD
OX,
AX
POP CX
CALL
ROS
CHECKSUM CNT
JZ
ROM-CHECK I -
CALL
ROM-ERR-
JMP
ROM:CHECK_END
ROM
CHECK
1:
- POSH
188F
188F
89
0000
18C2
18C2
32
CO
18C4
18C4
02
01
18C6
43
18C1
E2
F8
18C9
OA
CO
18C8
C3
18CC
1890
F3/
AC
189F
E4
62
18A
1
24
CO
18A3
15
II
18A5
81
C2
0400
18A9
83
E8
10
18AC
15
E6
18AE
8E
1902
R
1881
E8
1991
R
1884
FA
1885
F4
1886
1886
8C
DA
1
888
E8
OC8A R
1888
FA
188C
F4
1880
1880
58
188E
CF
188F
18CC 31
30
31
00
OA
1801
20
32 30
31
ODOA
1801
52
4F
40
00
OA
18DC 3 I
38
30
31
00
OA
18E2
50
41
52
49
54
59
20
43 48
45
43
48
20
32
00
OA
18F2
50
41
52
49
54
59
20
43 48 45
43
48
20
31
00
OA
1902
3F 3F
3F 3F
3F
00
OA
181F
80
00
1881
E6
AO
1883
E4
61
1885
OC
30
1881
E6
61
1889
24
CF
1888
E6
61
1880
88
1E
0013
R
1891
FC
1892
28
02
1894
1894
8E
DA
1896
8E
C2
1898
89
4000
1898
28
F6
1909
1909
F8
190A
50
1908
E4
61
1900
8A
EO
190F
F6
DO
1911
24
40
1913
80
E4
8F
1916
OA
C4
1918
E6
61
191A
80
20
191 C
E6
20
191E
58
191F
CF
1920
1920
1920
88
----
R
1923
8E
CO
1925
2A
E4
1921
8A
41
02
192A
81
09
192C
03
EO
192E
88
C8
1930
51
1931
89
0004
1934
03
E8
1936
03
DO
1938
59
1939
E8
18C2
R
193C
14
06
193E
E8
0146
R
1941
E8
14
90
1944
1944
52
IBM
Personal
Computer
MACRO
Assembler
Version
2.00
POST
-----
01/10/86
SYSTEM POST AND
810S
PROCEDURES
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20
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