SM n
+----++-----------------------------------------+-------------------------+
|TOHM|| TOHM BIT                                | ERP BOX NUMBER          |
|I*2 || 0    1    2    3    4    5    6    7    | (Add 100*(SM-1))        |
+----++-----------------------------------------+-------------------------+
| 00 || B01T B02T B03T B04T B05T B06T B07T B08T | 01 02 03 04 05 06 07 08 |
|    || B01A B02A B03A B04A B05A B06A B07A B08A |                         |
+----++-----------------------------------------+-------------------------+
| 01 || B09T B10T B11T B12T B13T B14T B15T B16T | 09 10 11 12 13 14 15 16 |
|    || B09A B10A B11A B12A B13A B14A B15A B16A |
+----++-----------------------------------------+-------------------------+
| 02 || C01T C02T C03T C04T C05T C06T C07T C08T | 17 18 19 20 21 22 23 24 |
|    || C01A C02A C03A C04A C05A C06A C07A C08A |                         |
+----++-----------------------------------------+-------------------------+
| 03 || C09T C10T C11T C12T C13T C14T C15T C16T | 25 26 27 28 29 30 31 32 |
|    || C09A C10A C11A C12A C13A C14A C15A C16A |                         |
+----++-----------------------------------------+-------------------------+
| 04 || W01T W02T W03T W04T W05T W06T W07T ---- | 33 34 35 36 37 38 39    |
|    || W01A W02A W03A W04A W05A W06A W07A ---- |                         |
+----++-----------------------------------------+-------------------------+
| 05 || E01T E02T E03T E04T E05T E06T E07T ---- | 40 41 42 43 44 45 46    |
|    || E01A E02A E03A E04A E05A E06A E07A ---- |
+----++-----------------------------------------+-------------------------+
      
SM n+1
+----++-----------------------------------------+-------------------------+
| 06 || B01T B02T B03T B04T B05T B06T B07T B08T | 01 02 03 04 05 06 07 08 |
|    || B01A B02A B03A B04A B05A B06A B07A B08A |
+----++-----------------------------------------+-------------------------+
| 07 || B09T B10T B11T B12T B13T B14T B15T B16T | 09 10 11 12 13 14 15 16 |
|    || B09A B10A B11A B12A B13A B14A B15A B16A |
+----++-----------------------------------------+-------------------------+
| 08 || C01T C02T C03T C04T C05T C06T C07T C08T | 17 18 19 20 21 22 23 24 |
|    || C01A C02A C03A C04A C05A C06A C07A C08A |
+----++-----------------------------------------+-------------------------+
| 09 || C09T C10T C11T C12T C13T C14T C15T C16T | 25 26 27 28 29 30 31 32 |
|    || C09A C10A C11A C12A C13A C14A C15A C16A |
+----++-----------------------------------------+-------------------------+
| 10 || W01T W02T W03T W04T W05T W06T W07T ---- | 33 34 35 36 37 38 39    |
|    || W01A W02A W03A W04A W05A W06A W07A ---- |
+----++-----------------------------------------+-------------------------+
| 11 || W01T W02T W03T W04T W05T W06T W07T ---- | 40 41 42 43 44 45 46    |
|    || W01A W02A W03A W04A W05A W06A W07A ---- |
+----++-----------------------------------------+-------------------------+
      
SM n  
+----++-----------------------------------------+-------------------------+
| 12 || W08T W09T W10T W11T W12T W13T W14T ---- | 71 72 73 74 75 76 77    |
|    || ---- ---- E08T E09T E10T E11T E12T E13T |       82 83 84 85 86 87 |
+----++-----------------------------------------+-------------------------+
| 13 || E14T ---- ---- ---- ---- ---- ---- ---- | 88                      |
|    || ---- ---- ---- ---- ---- ---- ---- ---- |                         |
+----++-----------------------------------------+-------------------------+
| 14 || W08A W09A W10A W11A W12A W13A W14A ---- | 71 72 73 74 75 76 77    |
|    || ---- ---- E08A E09A E10A E11A E12A E13A |       82 83 84 85 86 87 |
+----++-----------------------------------------+-------------------------+
| 15 || E14A ---- ---- ---- ---- ---- ---- ---- | 88                      |
|    || ---- ---- ---- ---- ---- ---- ---- ---- |                         |
+----++-----------------------------------------+-------------------------+
| 16 || T01T T02T T03T T04T T05T T06T T07T T08T | 54 55 56 57 58 59 60 61 |
|    || T09T T10T T11T T12T T13T T14T T15T T16T | 62 63 64 65 66 67 68 69 |
+----++-----------------------------------------+-------------------------+
| 17 || T17T ---- ---- ---- ---- ---- ---- ---- | 70                      |
|    || ---- ---- ---- ---- ---- ---- ---- ---- |                         |
+----++-----------------------------------------+-------------------------+
| 18 || T01A T02A T03A T04A T05A T06A T07A T08A | 54 55 56 57 58 59 60 61 |
|    || T09A T10A T11A T12A T13A T14A T15A T16A | 62 63 64 65 66 67 68 69 |
+----++-----------------------------------------+-------------------------+
| 19 || T17A ---- ---- ---- ---- ---- ---- ---- | 70                      |
|    || ---- ---- ---- ---- ---- ---- ---- ---- |                         |
+----++-----------------------------------------+-------------------------+
      
SM n+1
+----++-----------------------------------------+-------------------------+
| 20 || W08T W09T W10T W11T W12T W13T W14T ---- | 71 72 73 74 75 76 77    |
|    || ---- ---- E08T E09T E10T E11T E12T E13T |       82 83 84 85 86 87 |
+----++-----------------------------------------+-------------------------+
| 21 || E14T ---- ---- ---- ---- ---- ---- ---- | 88                      |
|    || ---- ---- ---- ---- ---- ---- ---- ---- |                         |
+----++-----------------------------------------+-------------------------+
| 22 || W08A W09A W10A W11A W12A W13A W14A ---- | 71 72 73 74 75 76 77    |
|    || ---- ---- E08A E09A E10A E11A E12A E13A |       82 83 84 85 86 87 |
+----++-----------------------------------------+-------------------------+
| 23 || E14A ---- ---- ---- ---- ---- ---- ---- | 88                      |
|    || ---- ---- ---- ---- ---- ---- ---- ---- |                         |
+----++-----------------------------------------+-------------------------+
| 24 || T01T T02T T03T T04T T05T T06T T07T T08T | 54 55 56 57 58 59 60 61 |
|    || T09T T10T T11T T12T T13T T14T T15T T16T | 62 63 64 65 66 67 68 69 |
+----++-----------------------------------------+-------------------------+
| 25 || T17T ---- ---- ---- ---- ---- ---- ---- | 70                      |
|    || ---- ---- ---- ---- ---- ---- ---- ---- |                         |
+----++-----------------------------------------+-------------------------+
| 26 || T01A T02A T03A T04A T05A T06A T07A T08A | 54 55 56 57 58 59 60 61 |
|    || T09A T10A T11A T12A T13A T14A T15A T16A | 62 63 64 65 66 67 68 69 |
+----++-----------------------------------------+-------------------------+
| 27 || T17A ---- ---- ---- ---- ---- ---- ---- | 70                      |
|    || ---- ---- ---- ---- ---- ---- ---- ---- |                         |
+----++-----------------------------------------+-------------------------+
      
 n/s (microVAX 1 and 3 only)
+----++-----------------------------------------+-------------------------+
| 28 || N01T N02T N03T N04T N05T N06T N07T ---- | 47 48 49 50 51 52 53    |
|    || ---- ---- ---- ---- ---- ---- ---- ---- |                         |
+----++-----------------------------------------+-------------------------+
| 29 || ---- ---- ---- ---- ---- ---- ---- ---- |                         |
|    || ---- ---- ---- ---- ---- ---- ---- ---- |                         |
+----++-----------------------------------------+-------------------------+
| 30 || N01A N02A N03A N04A N05A N06A N07A ---- | 47 48 49 50 51 52 53    |
|    || ---- ---- ---- ---- ---- ---- ---- ---- |                         |
+----++-----------------------------------------+-------------------------+
| 31 || ---- ---- ---- ---- ---- ---- ---- ---- |                         |
|    || ---- ---- ---- ---- ---- ---- ---- ---- |                         |
+----++-----------------------------------------+-------------------------+


Notes:

a) Words 0-23 are defined for pre-attico data.  North and South faces
are described with the same format as attico data at the end of the
equipment.

b) For backwards compatibility, the pre-attico data for both supermodules
is read out first, followed by attico data, and finally by n/s data (if
present).

c) For pre-attico data, the first 8 bits (least significant) in each
word have trigger information, the last 8 bits (most significant)
contain activity information.

d) Attico data is organized into 18 bits, read out by 24 bit reads.
This resulting data is padded to 32 bits in software so that there are
an even number of I*2 words.  This is why there are a large number of
unused bits above.

e) There is space left between W14 and E08 because for face triggering
the 18 bits in are divided into two patches of 9 bits.  In addition,
each pair of adjacent bits shares hardware, so the first bit chosen for
the East attico is the 11th bit.