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Note 155.0 FLAMINGO Physical Data Bit Map. 2 replies
MAST::RUDMAN "Cogito ergo sum, cogito..." 88 lines 17-SEP-1992 10:55
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For those of with a need to determine (quickly) where a particular data bit in
any given longword maps to physically (i.e. what DRAM on what FSIM), I offer the
following Bit Map. This map shows the FSIMs in their physical locations as
viewed from the system card side of the enclosure. Each set of four 3 digit
numbers equates to 1 DRAM. Each 3 digit number is made of of the Longword
designator (first digit) and the bit within that longword (last two digits).
The 'c' appearing as the middle bit indicates that that bit is an ECC checkbit.
Each tier (8) of FSIMs potentially represents 2 banks of memory (one bank per
populated side of the FSIM). The banks are numbered 0 to 7 with 0 being the
side closest to the system card and 7 being the side farthest from the system
card.
Determination of which FSIM you are interested in is accomplished in the
following manner:
1. From the console execute: SHOW MEM
This will show you what address range is mapped into which
bank.
2. Compare the address you're interested with the address table to
determine what physical bank the address was mapped into.
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DRAM= ___________ __________ ___________ __________
XXX XXX | 603 615 || 403 407 | | 203 215 || 003 007 |
XXX XXX | 607 620 || 415 420 | | 207 220 || 015 020 |
| ------- || ------- | | ------- || ------- |
Data pins | 619 6c1 || 419 428 | | 219 2c1 || 019 028 |
are: | 628 6c7 || 4c1 4c7 | | 228 2c7 || 0c1 0c7 |
1,2,24,25 | ------- || ------- | | ------- || ------- |
| 624 625 || 424 425 | | 224 225 || 024 025 |
Legend: | 627 631 || 427 431 | | 227 231 || 027 031 |
| ------- || ------- | | ------- || ------- |
lbb lbb | 618 629 || 418 429 | | 218 229 || 018 029 |
lbb lbb | 6c4 6c2 || 4c4 4c2 | | 2c4 2c2 || 0c4 0c2 |
| ------- || ------- | | ------- || ------- |
l =longword # | 602 606 || 402 406 | | 202 206 || 002 006 |
bb =bit # | 610 614 || 410 414 | | 210 214 || 010 014 |
(c =checkbit) | ------- || ------- | | ------- || ------- |
| ------- || ------- | | ------- || ------- |
| 703 707 || 503 507 | | 303 307 || 103 107 |
| 715 720 || 515 520 | | 315 320 || 115 120 |
| ------- || ------- | | ------- || ------- |
| 719 728 || 519 528 | | 319 328 || 119 128 |
| 7c1 7c7 || 5c1 5c7 | | 3c1 3c7 || 1c1 1c7 |
| ------- || ------- | | ------- || ------- |
| 724 725 || 524 525 | | 324 325 || 124 125 |
| 727 731 || 527 531 | | 327 331 || 127 131 |
| ------- || ------- | | ------- || ------- |
| 718 729 || 518 529 | | 318 329 || 118 129 |
| 7c4 7c2 || 5c4 5c2 | | 3c4 3c2 || 1c4 1c2 |
| ------- || ------- | | ------- || ------- |
| 702 706 || 502 506 | ___ | 302 306 || 102 106 |
| 710 714 || 510 514 | | C | | 310 314 || 110 114 |
----------- ---------- | P | ----------- ----------
----------- ---------- | U | ----------- ----------
| 709 708 || 509 508 | --- | 309 308 || 109 108 |
| 704 700 || 504 500 | | 304 300 || 104 100 |
| ------- || ------- | | ------- || ------- |
| 721 717 || 521 517 | | 321 317 || 121 117 |
| 713 712 || 513 512 | | 313 312 || 113 112 |
| ------- || ------- | | ------- || ------- |
| 7c0 726 || 5c0 526 | | 3c0 326 || 1c0 126 |
| 723 722 || 523 522 | | 323 322 || 123 122 |
| ------- || ------- | | ------- || ------- |
| 7c3 7c6 || 5c3 5c6 | | 3c3 3c6 || 1c3 1c6 |
| 730 716 || 530 516 | | 330 316 || 130 116 |
| ------- || ------- | | ------- || ------- |
| 7c5 711 || 5c5 511 | | 3c5 311 || 1c5 111 |
| 705 701 || 505 501 | | 305 301 || 105 101 |
| ------- || ------- | | ------- || ------- |
| ------- || ------- | | ------- || ------- |
| 609 608 || 409 408 | | 209 208 || 009 008 |
| 604 600 || 404 400 | | 204 200 || 004 000 |
| ------- || ------- | | ------- || ------- |
| 621 617 || 421 417 | | 221 217 || 021 017 |
| 613 612 || 413 412 | | 213 212 || 013 012 |
| ------- || ------- | | ------- || ------- |
| 6c0 626 || 4c0 426 | | 2c0 226 || 0c0 026 |
| 623 622 || 423 422 | | 223 222 || 023 022 |
| ------- || ------- | | ------- || ------- |
| 6c3 630 || 4c3 4c6 | | 2c3 230 || 0c3 0c6 |
Back | 6c6 616 || 430 416 | | 2c6 216 || 030 016 | Front
of | ------- || ------- | | ------- || ------- | of
box | 6c5 605 || 4c5 411 | | 2c5 205 || 0c5 011 | box
| 611 601 || 405 401 | | 211 201 || 005 001 |
----------- ---------- ----------- ----------
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Note 155.1 FLAMINGO Physical Data Bit Map. 1 of 2
MAST::RUDMAN "Cogito ergo sum, cogito..." 10 lines 2-OCT-1992 21:19
-< ...and to decode the bit in error from a crash... >-
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In order to decode exactly where the bit is located, you also need to be able
to determine on which FSIM the failire is located. To do this you need to see
the contents of the FILL_SYND and BIU_STAT registers. Bit's 13 & 12 are loaded
with the failing Quadword (QW0-QW3). The lower 7 bits of the FILL_SYND are
loaded with the syndrome for the lower longword (in the aforementioned
Quadword) and the next 7 bits for the upper longword. Refer to the syndrome
decode table in the EV4 CPU Chip Spec for syndrome-to-bit decode.
Rick
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Note 155.2 FLAMINGO Physical Data Bit Map. 2 of 2
MAST::RUDMAN "Cogito ergo sum, cogito..." 34 lines 6-NOV-1992 14:07
-< Fill Syndrome decode table >-
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Data bit Syndrome (hex) Check bit Syndrome (hex)
------------------------------- ------------------------------
00 4F C0 01
01 4A C1 02
02 52 C2 04
03 54 C3 08
04 57 C4 10
05 58 C5 20
06 5B C6 40
07 5D
08 23
09 25
10 26
11 29
12 2A
13 2C
14 31
15 34
16 0E
17 0B
18 13
19 15
20 16
21 19
22 1A
23 1C
24 62
25 64
26 67
27 68
28 6B
29 6D
30 70
31 75
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