Use this appendix to reconfigure jumpers on the system and expansion memory boards, and when you add SIMM memory or identify a failing SIMM.
A jumper is a small metal sleeve that slides over two neighboring pins in a 3- pin header to provide an electrical connection. Pin 1 is identified by the square solder pad. See Figure A-1 and Figure A-2 to locate jumpers on both boards.
Table A-1 System Board Jumper Configuration
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Label Jumper Default Configuration Function ---------------------------------------------------------------------------------------------------
ARB1 J1701 1-2 IN Enable internal VME arbiter
ARB2 J1702 1-2 IN Enable internal VME arbiter
ARB4 J1703 1-2 IN Enable internal VME arbiter
ARB3 J1704 1-2 IN Enable internal VME arbiter
ARBDIS J1705 1-2 OUT Disable internal VME arbiter
VMERST J1706 1-2 OUT VME reset in
2-3 IN VME reset out
VME17 J1801 1-2 IN Enable VME IRQ7 to system board
VME 16 3-4 IN Enable VME IRQ6 to system board
VME15 5-6 IN Enable VME IRQ5 to system board
VME14 7-8 IN Enable VME IRQ4 to system board
VME13 9-10 IN Enable VME IRQ3 to system board
VME12 11-12 IN Enable VME IRQ2 to system board
VME11 13-14 IN Enable VME IRQ1 to system board
None 15-16 OUT Not used
VMCK J1802 1-2 IN Enable VME 16 MHz clock (remove for in-circuit test)
SLOT1 J1803 1-2 IN Enable VME slot 1 functionality
SCSCK J2202 1-2 IN Enable ESP-236 25 MHz clock
TDMSE J2602 1-2 IN Disable TD mouse signal; read only
2-3 IN TD mouse controlled by 85C30; read/write (special function)
SERCK J2603 1-2 IN Enable UART 19.6608 MHz clock (remove for in-circuit test)
232/423- J2803 1-2 IN With J2804, sets serial ports to RS-223
2-3 IN With J2804, sets serial ports to RS-423A
232/423+ J2804 1-2 IN With J2803, sets serial ports to RS-232
2-3 IN With J2803, sets serial ports to RS-423A
FUNC- J3201 1-2 IN Enable 80 MHz clock (remove for in-circuit test)
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Table A-2 provides the jumper configurations for the expansion memory board.
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Label Jumper Configuration Function ------------------------------------------------------------------------------
Bank 0 installed P3601 1-2 SIMMs installed in Bank 0
In, Out 2-3 SIMMs not installed in Bank 0
Bank 1 installed P3602 1-2 SIMMs installed in Bank 1
In, Out 2-3 SIMMs not installed in Bank 1
Bank 2 installed P3603 1-2 SIMMs installed in Bank 2
In, Out 2-3 SIMMs not installed in Bank 2
Bank 3 installed P3604 1-2 SIMMs installed in Bank 3
In, Out 2-3 SIMMs not installed in Bank 3
Bank 0, 1 SIMMs P3605 1-2 Double-sided SIMMs in Banks 0 and 1
Dbl, Sgl 2-3 Single-sided SIMMS in Banks 0 and 1
Bank 2, 3 SIMMs P360 1-2 Double-sided SIMMs in Banks 2 and 3
Dbl, Sgl 2-3 Single-sided SIMMs in Banks 2 and 3
Board P3607 1-2 Select memory board 2
1, 2 2-3 Select memory board 1
Bank 3 P3301 1-2 80ns SIMMs installed
80ns, 100ns 2-3 100ns SIMMs installed
Bank 2 P3302 1-2 80ns SIMMs installed
80ns, 100ns 2-3 100ns SIMMs installed
Bank 1 P3303 1-2 80ns SIMMs installed
80ns, 100ns 2-3 100ns SIMMs installed
Bank 0 P3304 1-2 80ns SIMMs installed
80ns, 100ns 2-3 100ns SIMMs installed
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When a SIMM fails during Power-on Self-test (POST), the U-number, physical address, and board identification (memory- or system board) displays on the tty terminal.
Table A-3 Displayed Hex Value for Board/Bank
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Displayed Hex Value Board Bank ----------------------------------------------------------------------------------------------------
0 x x x x x x x* System 0
1 x x x x x x x System 1
2 x x x x x x x - illegal - no Bank 2 on the system board
3 x x x x x x x - illegal - no Bank 3 on the system board
4 x x x x x x x 1st EXPM 0
5 x x x x x x x 1st EXPM 1
6 x x x x x x x 1st EXPM 2
7 x x x x x x x 1st EXPM 3
8 x x x x x x x 2nd EXPM 0
9 x x x x x x x 2nd EXPM 1
A x x x x x x x 2nd EXPM 2
B x x x x x x x 2nd EXPM 3
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The method used to identify the indicted SIMM is unique to the particular operating system running on your system. To determine the U-number of the failed SIMM, perform the appropriate procedure below:
AFAR1, AFAR0 and AFSR should print out when the next error occurs.
Figure A-3 Example Printout of Error Information
Note -
The important values presented in Figure A-3 are:
AFSR = 0x3401
AFAR0 = 0x9fc60d30
AFAR1 = 0x518fb8a0
Following steps below, use this information to determine the involved system
board or memory board, and to identify the u-number of the failed SIMM.
This is the block number.
From our example in Figure A-3, the AFSR value is used to produce the block number as follows:
So, AFSR [7:4] is 0; the block number is 0.
Determine the temporary offset as follows:
If the value of 11:8 is 4 or 5 (decimal), multiply the block number (noted
in step a) by 8 (see illustration below).
This yields the temporary offset value (in this example, "0").
Using these eight bits
S7, S6, S5, S4 = 0011
S3, S2, S1, S0 = 0100
refer to Table A-4 to determine the syndrome code.
Table A-4 Syndrome Field Interpretation
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S7 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 S6 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 Syndrome S5 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 Bits S4 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 S3 S2 S1 S0 ---------------------------------------------------------------------------------------------
0 0 0 0 * C4 C5 D C6 D D T C7 D D T D T T Q
0 0 0 1 C0 D D 00 D 25 M D D 05 17 D 08 D D 12
0 0 1 0 C1 D D 01 D 29 36 D D M 21 D 13 D D 09
0 0 1 1 D 32 33 D 42 D D M 47 D D M D T T D
0 1 0 0 C2 D D 10 D 27 07 D D M 19 D 02 D D 14
0 1 0 1 D 57 61 D 59 Q D M 63 D Q M D M M D
0 1 1 0 D M 04 D 39 D D 22 M D D 30 D 16 24 D
0 1 1 1 T D D M D M 54 D D 50 M D T D D M
1 0 0 0 C3 D D 15 D 31 M D D 38 23 D 03 D D 11
1 0 0 1 D 37 M D M D D 18 06 D D 26 D 20 28 D
1 0 1 0 D 49 53 D 51 Q D M 55 D Q M D M M D
1 0 1 1 T D D M D M 62 D D 58 M D T D D M
1 1 0 0 D 40 45 D 34 D D T 35 D D T D M M D
1 1 0 1 T D D T D M 48 D D 52 M D M D D M
1 1 1 0 T D D T D M 56 D D 60 M D M D D M
1 1 1 1 Q 44 41 D 46 D D M 43 D D M D M M Q
* No error detected
D Double-bit error
T Triple-bit error
Q Quadruple-bit error
M More than 4-bit error
Numeric Bit number os the single-bit error
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Note that in our example
S7, S6, S5, S4 = 0011
S3, S2, S1, S0 = 0100
the syndrome code is 10:
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S7 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 S6 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 Syndrome S5 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 Bits S4 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 S3 S2 S1 S0 --------------------------------------------------------------------
0 0 0 0 * C4 C5 D C6 D D T C7 D D T D T T Q
0 0 0 1 C0 D D 00 D 25 M D D 05 17 D 08 D D 12
0 0 1 0 C1 D D 01 D 29 36 D D M 21 D 13 D D 09
0 0 1 1 D 32 33 D 42 D D M 47 D D M D T T D
0 1 0 0 C2 D D 10 D 27 07 D D M 19 D 02 D D 14
0 1 0 1 D 57 61 D 59 Q D M 63 D Q M D M M D
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Table A-5 Method Used to Identify the Faulty SIMM
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Syndrome Code Value Nature of Failure Diagnosis Offset Computation Method ------------------------------------------------------------------------------------------------------------------------------------------
0 Through 63 Single byte error Identify the faulty SIMM offset = offset1 and (7-syn_code/8).
Use AFAR1 and 0x0xfffffff8 + offset as the
physical address for decoding.
64 Through 71 Single byte error Identify the faulty SIMM offset = offset and (7-syn_code mod 8).
Use AFAR1 and 0x0xfffffff8 + offset as the
physical address for decoding.
72 or Greater Multiple byte error Identify the group of 8 The 8 true physical addresses are:
SIMMs which is failing
AFAR1 and 0xfffffff8 + 0
AFAR1 and 0xfffffff8 + 1
AFAR1 and 0xfffffff8 + 2
AFAR1 and 0xfffffff8 + 3
AFAR1 and 0xfffffff8 + 4
AFAR1 and 0xfffffff8 + 5
AFAR1 and 0xfffffff8 + 6
AFAR1 and 0xfffffff8 + 7
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Given that the syndrome code established in step c above is 10, the row "0 through 63" in Table A-5 applies since 10 is within the range 0-63.
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Syndrome Code Value Nature of Failure Diagnosis Offset Computation Method --------------------------------------------------------------------------------------------------------------
0 Through 63 Single byte error Identify the faulty SIMM offset = offset1 and (7-syn_code/8).
Use AFAR1 and 0x0xfffffff8 + offset as the
physical address for decoding.
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Offset = offset + (7 -10/8)
Our offset is 0
Offset = 0 + (7 -10/8)
= 0 + (7 -1)
= 6
(AFAR1 and 0xfffffff8) + offset
= 0x518fb8a0 and 0xfffffff8 + 6
= 0x 0x518fb8a0 + 6
= 0x518fb8a6
From the example above, bits [31:28] are 5.
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PA PA [2:0]: 000 001 010 011 100 101 110 111 29,28,3 Data: 63:56 55:48 47:40 39:32 31:24 23:16 15:8 7:0 ECC: 7 6 5 4 3 2 1 0 -----------------------------------------------------------------------
0 0 0 U1805 U1801 U1705 U1701 U1605 U1601 U1505 U1501
0 0 1 U1807 U1803 U1707 U1703 U1607 U1603 U1507 U1503
0 1 0 U1806 U1802 U1706 U1702 U1606 U1602 U1506 U1502
0 1 1 U1808 U1804 U1708 U1704 U1608 U1604 U1508 U1504
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The failing SIMM is on the 1st expansion memory board in location U1506.
An ECC correctable error is reported only when there are more that 256 errors for each SIMM. By default, this prints only to the log file. Override default reporting using the procedure below.
AFAR1, AFAR0 and AFSR should print out when the next error occurs.
o SIMM number
o Offset of the error byte in the 8/16/32 byte transaction
o Bits in error
o Physical addresses of the start of the 8/16/32 byte group in error
An example appears below:
In this case,
(0x518fb8a0 AND fffffff8) + 6
The following tables and figure are supplemental information.
Table A-6 SIMM U-Numbers for System Board
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PA 28,3 PA [2:0]: 000 001 010 011 100 101 110 111 Data: 63:56 55:48 47:40 39:32 31:24 23:16 15:8 7:0 ECC: 7 6 5 4 3 2 1 0 -----------------------------------------------------------------------
0 0 U1201 U1203 U1205 U1207 U1101 U1103 U1105 U1107
0 1 U1401 U1403 U1405 U1407 U1301 U1303 U1305 U1307
1 0 U1202 U1204 U1206 U1208 U1102 U1104 U1106 U1108
1 1 U1402 U1404 U1406 U1408 U1302 U1304 U1306 U1308
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Table A-7 SIMM U-Numbers for Memory Board
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PA PA [2:0]: 000 001 010 011 100 101 110 111 29,28,3 Data: 63:56 55:48 47:40 39:32 31:24 23:16 15:8 7:0 ECC: 7 6 5 4 3 2 1 0 -----------------------------------------------------------------------
0 0 0 U1805 U1801 U1705 U1701 U1605 U1601 U1505 U1501
0 0 1 U1807 U1803 U1707 U1703 U1607 U1603 U1507 U1503
0 1 0 U1806 U1802 U1706 U1702 U1606 U1602 U1506 U1502
0 1 1 U1808 U1804 U1708 U1704 U1608 U1604 U1508 U1504
1 0 0 U2205 U2201 U2105 U2101 U2005 U2001 U1905 U1901
1 0 1 U2207 U2203 U2107 U2103 U2007 U2003 U1907 U1904
1 1 0 U2206 U2202 U2106 U2102 U2006 U2002 U1906 U1902
1 1 1 U2208 U2204 U2108 U2104 U2008 U2004 U1908 U1904
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