January 1991 COMINT PROM's ------------------------------------------------------ REV. 17-SEPT-1991 The first section of this note describes the code stored in the January 1991 version of the COMINT PROM's. The second section describes the steps that our 68020 must use along with multiple block transfers into the VBD in order to full obtain a L1 Data Block in a VAX Zebra bank as described in D0 Note 967. Item 477 and below (PROM address 1DD hex) is the "Classical Trigger Framework". Data in this ardrss range is read only on CBus 0. The structure of this data has not changed for some years. Items 478 through 532 (PROM address 1DE through 214 hex) are used to read out information from the final sums of the L1 Calorimeter Trigger and from the Fast Vertex, and from the L1.5 trigger. Once again data is read only on CBus 0. No data is read at Items 533 and 534 (PROM addresses 215 and 216 hex). No data is read at Items 4537 and 4538 (PROM addresses 697 and 698 hex). No data is read at Items 4859 and 4860 (PROM addresses 7D9 and 7DA hex). These locations are used to insert an Intermediate Word Count and to start another transfer to the VBD module. Above Item 535 (PROM adrs 217 hex) the MBA, CA, and FA PROMs for CBus 0 are identical to the MBA, CA, and FA PROMs for CBus 1 (except for PROM Addresses 7DB through 7FA where the CBus 1 PROM is all 0's). The CBUS1 PROMs should contain 0's elsewhere, while the contents of the CBus 0 PROMs from address 0 through address 1DD (hex) have been described in the document TRGINTR:DATA_BLOCK_ADDRESSES_PART1.TXT. For the Calorimeter Trigger the CBus 0 Prom's readout phi's 1 through 16, while the CBus 1 Prom's readout the phi's 17 through 32. NOTE: Because of the limited address range of the COMINT Prom's (2048 addresses) the full eta range of the Level 1 Calorimeter Trigger can not be readout with one COMINT card. The comint PROM's described below will readout the CTFE Trigger Tower Data only in the absolute eta range of 1 through 8. The CHTCR Jet Mask data and the CHTCR Hot Tower data is readout over the full eta range of absolute 1 through 20. It is indented that by use of the 68020 to move some parts of the data block and by use of multiple transfers into the VBD that the L1 Data Block as seen in a Zebra bank will fully match D0 Note 967. The code for the PROM's described in this note is stored in the files: COMMBA0A.DAT \ COMMBA1A.DAT \ COMCAD0A.DAT -- for CBus 0 COMCAD1A.DAT -- for CBus 1 COMFAD0A.DAT / COMFAD1A.DAT / History Slices -------------- The Function Addresses (history slices) readout on the CTFE and CHTCR cards are the 3rd from the newest as the current and the oldest as the previous (i.e. if the history slices are numbered 1 = newest through 8 = oldest then we want to read slices 4 and 8). In the CHTCR card this translates into Function Addresses 128...159 as the current beam crossing and 0...31 as the previous beam crossing. In the CTFE this requires reading Function Addresses 128...135 as the current beam crossing and 0...7 for data from the previous previous beam crossing. TRD Hot Tower Table Information ------------------------------- D0 Note 967 specifies Item Numbes 4539 through 4858 as TRD Hot Tower Table Information but it does not specify any details about the arrangement of data with in this section of the L1 Data Block. The arrangement implemented with these COMINT PROM's holds to the same "standard" that was specified in note 967 for reading out other sections of the L1 Calorimeter Trigger. Specifically: phi is the "fast" index with eta incrementing after a full scan through phi, phi's 1...16 are read on the Low Byte (CBus0) and phi's 17...32 are read on the High Byte (CBus1), the positive eta's are read first followed by the negative eta's. Recall that the Function Addresses available on the CHTCR card for reading the TRD Hot Tower Table Information are in the range from FA=0 through FA=15. Because these FA's are under 128 they are read on the second pass through the COMINT PROM's, i.e. the pass with the FA8 address line low, the pass that reads the "Previous Beam Crossing" data. Building the full L1 Data Block ------------------------------- All that follows below assumes that if the Current Beam Crossing data of an item appears in the "raw" Data Block at VME address $00300xyz, then that the data from the Previous Beam Crossing for this item appears at VME address $00301xyz The following is a list of VBD DMA sections used to build the data block. Length in Bytes VME Starting Decimal Hex Address Hex Contents --------------- ------------ --------------------------------- 1064 $428 $300004 Current Framework, Cal Trig Final Sums, L0 Vertex, and L1.5 data 2560 $A00 $306000 Current Cal Trig EM Et and HD Et 1064 $428 $301004 Previous Framework, Cal Trg Final Sums, L0 Vertex, and L1.5 data 2560 $A00 $307000 Previous Cal Trig EM Et and HD Et 260 $104 $306B00 EM Jet List 260 $104 $306D00 Total Et Jet List 1280 $500 $300830 Mask of Jet Patterns "Jet Mask" 640 $280 $301E74 TRD Hot Tower Table Information 100 $64 $301FB8 Specific Trigger Programming Infrm 512 $200 $304000 Pulser Programming Data, 2 groups of 64 longwords each, transported by but not part of the L1 Trigger Data Block. Central Detector and Calorimeters. 256 $100 $304400 CAMAC Data about less then 100 longwords. Transported by but not part of the L1 Trigger Data Block. The following is a list of the memory locations that will be used in the VME-214 Memory module. Recall that this module lives in VME addresses $00300000 through $00307FFF. VME Address Range Contents --------------------------- -------------------------------- $00300000 through $00300FFF Current Beam Crossing Data $00301000 through $00301FFF Previous Beam Crossing Data $00304000 through $003040FF Central Detector Pulser Data $00304100 through $003041FF Calorimeter Pulser Data $00304400 through $003047FF CAMAC Data $00305000 through $0030501F Crate Header data 5 longwords $00306000 through $003069FF Copy of Current Beam Crossing CTFE Data $00307000 through $003079FF Copy of Previous Beam Crossing CTFE Data $00306B00 through $00306C03 EM Et Jet List stored here for VBD to read $00306D00 through $00306E03 Total Et Jet List stored here for VBD to read List of steps for the 68020 to get the "raw" L1 Data Block ready for the VBD ---------------------------------------------------------------------------- Once at Initialization time ----------------------------- Write the value of the CTFE ADC zero energy responce, $08, in VME memory locations $00306000 through $00306A00 and locations $00307000 through $00307A00. For every Data Block ---------------------- Copy the CTFE Current Beam Crossing EM Et and HD Et data, that is read out with this version of the COMINT PROM's into the address range $00306000 through $003060A00. Specifically for the January 1991 COMINT PROM's which readout the CTFE data only in the eta range of |1...8| the following sections need to be copied: Copy $00300430 through $0030052C to the area starting with $00306000 Copy $00300530 through $0030062C to the area starting with $00306280 Copy $00300630 through $0030072C to the area starting with $00306500 Copy $00300730 through $0030082C to the area starting with $00306780 All copies are Longword copies and there are a total of 256 of them. Then copy the CTFE data from the Previous Beam Crossing to the area starting with address $00307000: Copy $00301430 through $0030152C to the area starting with $00307000 Copy $00301530 through $0030162C to the area starting with $00307280 Copy $00301630 through $0030172C to the area starting with $00307500 Copy $00301730 through $0030182C to the area starting with $00307780 All copies are Longword copies and there are a total of 256 of them. Build the event to event dynamic part of the information used to build the Jet Lists (Note 967 Items 4895...4910) and store it in the MVME-214 memory module starting at VME address $00301FFC. Build the EM Et Jet List and store it in the MVME-214 memory module starting at VME address $00306B00. Build the Total Et Jet List and store it in the MVME-214 memory module starting at VME address $00306D00. Tell the VBD to run its DMA list. Information at VME Longword Address $300000 ------------------------------------------- The standard VME address where the COMINT Card builds the "raw" L1 Data Block is starting with VME address 300000. Note that the first two Items in D0 Note 967 are stored in the VME longword with address 300004 (i.e. VME word 300004 and 300006. This is because VME longword 300000 is "skipped" because address 0 of the COMINT PROM's has not been used and because it takes one cycle of the COMINT data block buiilder to fill the output register of the COMINT's Registered PROM's. Data Structures Built by the January 1991 COMINT PROM's ----------------------------------------------------------- Specific Triggers Fired List VME Byte Address Byte of the Specific Triggers Fired List -------------- -------------------------------------------- 300387 1st byte (LSB) of Spec. Trigs. Fired List 300385 2nd byte of Specific Triggers Fired List 30038B 3rd byte of Specific Triggers Fired List 300389 4th byte (MSB) of Spec. Trigs. Fired List Bit Number VME ----------------------------- Longword 3 2 2 1 1 Address 1 4 3 6 5 8 7 0 -------- - - - - - - - - ----------------------------- $300380 | | | | | ----------------------------- $300384 | | 2nd | | 1st | Specific Triggers ----------------------------- Fired List in $300388 | | 4th | | 3rd | VME Memory. ----------------------------- 4 bytes total. $30038C | | | | | ----------------------------- EM Et Data Arrangement of this data in VME Addresses Bit Number VME ----------------------------- Longword 3 2 2 1 1 Address 1 4 3 6 5 8 7 0 -------- - - - - - - - - ----------------------------- $300430 | 18 | 2 | 17 | 1 | <--- Trigger ----------------------------- Tower Phi $300434 | 20 | 4 | 19 | 3 | Index ----------------------------- $300438 | 22 | 6 | 21 | 5 | Example is ----------------------------- shown for $30043C | 24 | 8 | 23 | 7 | Eta Index ----------------------------- equal +1 $300440 | 26 | 10 | 25 | 9 | Current Beam ----------------------------- Crossing $300444 | 28 | 12 | 27 | 11 | Data. ----------------------------- $300448 | 30 | 14 | 29 | 13 | ----------------------------- $30044C | 32 | 16 | 31 | 15 | ----------------------------- Specific Trigger Programming Data Arrangement of this Data in VME Addresses This is a diagram showing where the bytes of Specific Trigger Programming Information is stored in VME address space. There is information for the four EM Reference Sets and the four Total Et Reference Sets. The data for Specific Trigger #0 is stored in bit number 0 of the "first byte" and the data for Specific Trigger #31 is stored in most significant bit of the "fourth byte". Information Showing which Specific Triggers Depend on which Reference Sets Longword Next High Address Longword Bit Number Bit Number VME ------------------------- ------------------------- Longword 3 2 2 1 1 3 2 2 1 1 Address 1 4 3 6 5 8 7 0 1 4 3 6 5 8 7 0 -------- - - - - - - - - - - - - - - - - ------------------------- ------------------------- $301FB8 | - | 2nd | - | 1st | | - | 4th | - | 3rd | EM Ref Set 0 ------------------------- ------------------------- $301FC0 | - | 2nd | - | 1st | | - | 4th | - | 3rd | EM Ref Set 1 ------------------------- ------------------------- $301FC8 | - | 2nd | - | 1st | | - | 4th | - | 3rd | EM Ref Set 2 ------------------------- ------------------------- $301FD0 | - | 2nd | - | 1st | | - | 4th | - | 3rd | EM Ref Set 3 ------------------------- ------------------------- ------------------------- ------------------------- $301FD8 | - | 2nd | - | 1st | | - | 4th | - | 3rd | HD Ref Set 0 ------------------------- ------------------------- $301FE0 | - | 2nd | - | 1st | | - | 4th | - | 3rd | HD Ref Set 1 ------------------------- ------------------------- $301FE8 | - | 2nd | - | 1st | | - | 4th | - | 3rd | HD Ref Set 2 ------------------------- ------------------------- $301FF0 | - | 2nd | - | 1st | | - | 4th | - | 3rd | HD Ref Set 3 ------------------------- ------------------------- Information Showing which Specific Triggers Depend on which Reference Sets AND those Specific Triggers Fired on this Event Bit Number VME --------------------------------- Longword 3 2 2 1 1 Address 1 4 3 6 5 8 7 0 -------- - - - - - - - - --------------------------------- $301FF8 | RESERVED | --------------------------------- --------------------------------- $301FFC | 4th | 3rd | 2nd | 1st | EM Ref Set 0 --------------------------------- $302000 | 4th | 3rd | 2nd | 1st | EM Ref Set 1 --------------------------------- $302004 | 4th | 3rd | 2nd | 1st | EM Ref Set 2 --------------------------------- $302008 | 4th | 3rd | 2nd | 1st | EM Ref Set 3 --------------------------------- --------------------------------- $30200C | 4th | 3rd | 2nd | 1st | HD Ref Set 0 --------------------------------- $302010 | 4th | 3rd | 2nd | 1st | HD Ref Set 1 --------------------------------- $302014 | 4th | 3rd | 2nd | 1st | HD Ref Set 2 --------------------------------- $302018 | 4th | 3rd | 2nd | 1st | HD Ref Set 3 --------------------------------- MOTHER BOARD ADDRESS ==================== In MVME214 Starts @ Starts @ Note 967 PROM MBA VME hex ITEM Address Data Longword Number Hex hex Information Read from Trigger Address ------ --------- ---- --------------------------------- ------- 1..477 1...1DD Clasical Trigger Framework $300004 478 1DE...214 39 Framework Expansion, Calor Trig $3003BC Final Sums (533) 215 00 NO DATA READOUT $30042C (534) 216 00 NO DATA READOUT 535 217...256 A9 eta = 1..4, EM Et Trigger $300430 599 257...296 AA eta = 5..8 Tower 855 297...2D6 AC eta = -1..-4 EM Et Trigger $300530 919 2D7...316 AF eta = -5..-8 Tower 1175 317...356 A9 eta = 1..4, HD Et Trigger $300630 1239 357...396 AA eta = 5..8 Tower 1495 397...3D6 AC eta = -1..-4 HD Et Trigger $300730 1559 3D7...416 AF eta = -5..-8 Tower 3897 417...41E A9 eta = 1...4 EM Ref Set 0 $300830 3905 41F...426 AA eta = 5...8 Jet Mask 3913 427...42E C9 eta = 9...12 3921 42F...436 CA eta = 13...16 3929 437...43E E1 eta = 17...20 3937 43F...446 AC eta = -1...-4 EM Ref Set 0 $300880 3945 447...44E AF eta = -5...-8 Jet Mask 3953 44F...456 CC eta = -9...-12 3961 457...45E CF eta = -13...-16 3969 45F...466 E4 eta = -17...-20 3977 467...46E A9 eta = 1...4 EM Ref Set 1 $3008D0 3985 46F...476 AA eta = 5...8 Jet Mask 3993 477...47E C9 eta = 9...12 4001 47F...486 CA eta = 13...16 4009 487...48E E1 eta = 17...20 4017 48F...496 AC eta = -1...-4 EM Ref Set 1 $300920 4025 497...49E AF eta = -5...-8 Jet Mask 4033 49F...4A6 CC eta = -9...-12 4041 4A7...4AE CF eta = -13...-16 4049 4AF...4B6 E4 eta = -17...-20 4057 4B7...4BE A9 eta = 1...4 EM Ref Set 2 $300970 4065 4BF...4C6 AA eta = 5...8 Jet Mask 4073 4C7...4CE C9 eta = 9...12 4081 4CF...4D6 CA eta = 13...16 4089 4D7...4DE E1 eta = 17...20 4097 4DF...4E6 AC eta = -1...-4 EM Ref Set 2 $3009C0 4105 4E7...4EE AF eta = -5...-8 Jet Mask 4113 4EF...4F6 CC eta = -9...-12 4121 4F7...4FE CF eta = -13...-16 4129 4FF...506 E4 eta = -17...-20 4137 507...50E A9 eta = 1...4 EM Ref Set 3 $300A10 4145 50F...516 AA eta = 5...8 Jet Mask 4153 517...51E C9 eta = 9...12 4161 51F...526 CA eta = 13...16 4169 527...52E E1 eta = 17...20 4177 52F...536 AC eta = -1...-4 EM Ref Set 3 $300A60 4185 537...53E AF eta = -5...-8 Jet Mask 4193 53F...546 CC eta = -9...-12 4201 547...54E CF eta = -13...-16 4209 54F...556 E4 eta = -17...-20 4217 557...55E A9 eta = 1...4 HD Ref Set 0 $300AB0 4225 55F...566 AA eta = 5...8 Jet Mask 4233 567...56E C9 eta = 9...12 4241 56F...576 CA eta = 13...16 4249 577...57E E1 eta = 17...20 4257 57F...586 AC eta = -1...-4 HD Ref Set 0 $300B00 4265 587...58E AF eta = -5...-8 Jet Mask 4273 58F...596 CC eta = -9...-12 4281 597...59E CF eta = -13...-16 4289 59F...5A6 E4 eta = -17...-20 4297 5A7...5AE A9 eta = 1...4 HD Ref Set 1 $300B50 4305 5AF...5B6 AA eta = 5...8 Jet Mask 4313 5B7...5BE C9 eta = 9...12 4321 5BF...5C6 CA eta = 13...16 4329 5C7...5CE E1 eta = 17...20 4337 5CF...5D6 AC eta = -1...-4 HD Ref Set 1 $300BA0 4345 5D7...5DE AF eta = -5...-8 Jet Mask 4353 5DF...5E6 CC eta = -9...-12 4361 5E7...5EE CF eta = -13...-16 4369 5EF...5F6 E4 eta = -17...-20 4377 5F7...5FE A9 eta = 1...4 HD Ref Set 2 $300BF0 4385 5FF...606 AA eta = 5...8 Jet Mask 4393 607...60E C9 eta = 9...12 4401 60F...616 CA eta = 13...16 4409 617...61E E1 eta = 17...20 4417 61F...626 AC eta = -1...-4 HD Ref Set 2 $300C40 4425 627...62E AF eta = -5...-8 Jet Mask 4433 62F...636 CC eta = -9...-12 4441 637...63E CF eta = -13...-16 4449 63F...646 E4 eta = -17...-20 4457 647...64E A9 eta = 1...4 HD Ref Set 3 $300C90 4465 64F...656 AA eta = 5...8 Jet Mask 4473 657...65E C9 eta = 9...12 4481 65F...666 CA eta = 13...16 4489 667...66E E1 eta = 17...20 4497 66F...676 AC eta = -1...-4 HD Ref Set 3 $300CE0 4505 677...67E AF eta = -5...-8 Jet Mask 4513 67F...686 CC eta = -9...-12 4521 687...68E CF eta = -13...-16 4529 68F...696 E4 eta = -17...-20 (4537) 697 00 NO DATA READOUT $300D30 (4538) 698 00 NO DATA READOUT 4539 699...6B8 A9 eta = 1...4 TRD Hot Tower $300D34 4571 6B9...6D8 AA eta = 5...8 Table Information 4603 6D9...6F8 C9 eta = 9...12 4635 6F9...718 CA eta = 13...16 4667 719...738 E1 eta = 17...20 4699 739...758 AC eta = -1...-4 TRD Hot Tower $300E74 4731 759...778 AF eta = -5...-8 Table Information 4763 779...798 CC eta = -9...-12 4795 799...7B8 CF eta = -13...-16 4827 7B9...7D8 E4 eta = -17...-20 (4859) 7D9 00 NO DATA READOUT $300FB4 (4860) 7DA 00 NO DATA READOUT 4861 7DB...7FA 69 Specific Trigger Programming $300FB8 7FB...7FF 00 NO DATA READOUT $300FF8 CARD ADDRESS ============ Starts @ Card Note 967 PROM Adrs Starts@ ITEM Address Data VME hex Number Hex hex Information Read from Trigger Address ------ --------- ---- --------------------------------- ------- 1..477 1...1DD Clasical Trigger Framework 478 1DE...1ED 0A Frmwrk Expn EtEM,EtHD,Px,Py IMLRO Note Items 490..493 (i.e. the 4 reserved Items) may change in the future. 494 1EE...1FC 0B Frmwrk Expn EtTotal,Pt,L2 Sums IMLRO Note Items 497..499 (i.e. the missing Pt) may change in the future. 509 1FD...20C 0C Frmwrk Expn CHTCR Final Counts IMLRO 525 20D...214 09 Frmwrk Expn L0 Vertex, L1.5 IMLRO (533) 215 00 NO DATA READOUT (534) 216 00 NO DATA READOUT 535 217...416 the pattern 20, 22, 24, 26, 28, 2A, 2C, 2E, 30, 32, 34, 36, 38, 3A, 3C, 3E repeats 32 times. This is scanning through the CTFE cards in order to scan through phi which is the "fast" index. 8 scans to cover the: 8 positive eta EM Et's, the 8 negative eta EM Et's, the 8 positive eta HD Et's, and the 8 negative eta HD Et's. 3897 417...696 The Card Address pattern 2, 4 is repeated 320 times. Each time the 2,4 pattern is used all of the phi's at an eta are readout. There are 40 eta's per Reference Set and there are 8 Reference Sets. This scans through all of the Jet Masks (EM 0,1,2,3, and HD 0,1,2,3). (4537) 697 00 NO DATA READOUT (4538) 698 00 NO DATA READOUT 4539 699...7D8 The pattern 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5 is repeated 10 times. Each time the pattern is used all of the Hot Tower Table information for all of the phi's in an eta range of 4 units is readout. (4859) 7D9 00 NO DATA READOUT (4860) 7DA 00 NO DATA READOUT 4861 7DB...7FA The Card Address 0E is repeated 32 times to readout all 32 bytes from the AND-OR card that is used to pass Specific Trigger Programming Information. 7FB...7FF 00 NO DATA READOUT FUNCTION ADDRESSES ================== Starts @ Function Note 967 PROM Adrs Starts@ ITEM Address Data VME hex Number Hex hex Information Read from Trigger Address ------ --------- ---- --------------------------------- ------- 1..477 1...1DD Clasical Trigger Framework 478 1DE...1ED Frmwrk Expn EtEM,EtHD,Px,Py IMLRO The pattern is 0,1,2, 4,5,6, 8,9,A, C,D,E, 3,7,B,F. Note the last four Items 490...493 may change in the future (and to a different Card Address) as these are reserved Items at this time. 494 1EE...1FC Frmwrk Expn EtToT,Pt,L2EM,L2HD,L2Tot IMLRO The pattern is 8,9,A, 3,7,B, 0,1,2, 4,5,6, C,D,E. Note the second three Items 497...499 are for reading the missing Pt and for now these will be generated by the 68020. In the future the Pt items may/will change and may/will use a different Card Address. 509 1FD...20C Frmwrk Expn CHTCR Final Counts IMLRO The pattern is: 0,1,2,3,4,5,6,7,8,9,A, B,C,D,E,F. 525 20D...214 Frmwrk Expn L0 Vertex, L1.5 IMLRO For now the pattern is: 0,1,2,3,4,5,6,7. This may/will change in the future. (533) 215 00 NO DATA READOUT (534) 216 00 NO DATA READOUT 535 217...316 The pattern is sixteen 0's, then sixteen 2's, then sixteen 4's, then sixteen 6's. This pattern is repeated four times; first time scans eta's +1...+4, the second time scans eta's +5...+8, the third time scans eta's -1...-4, and the fourth time scans eta's -5...-8. This is used to read the EM Trigger Towers from the CTFE cards. 1175 317...416 The pattern is sixteen 1's, then sixteen 3's, then sixteen 5's, then sixteen 7's. This pattern is repeated four times; first time scans eta's +1...+4, the second time scans eta's +5...+8, the third time scans eta's -1...-4, and the fourth time scans eta's -5...-8. This is used to read the HD Trigger Towers from the CTFE cards. 3897 417...466 The pattern is 0, 0, 1, 1, 2, 2, 3, 3. This pattern is repeated ten times. The first five times reads out the eta range 1...20 and the second time reads out the range -1...-20. This is EM Ref Set 0 from the CHTCR card. 3977 467...4B6 The pattern is 4, 4, 5, 5, 6, 6, 7, 7. This pattern is repeated ten times. The first five times reads out the eta range 1...20 and the second time reads out the range -1...-20. This is EM Ref Set 1 from the CHTCR card. 4057 4B7...506 The pattern is 8, 8, 9, 9, A, A, B, B. This pattern is repeated ten times. The first five times reads out the eta range 1...20 and the second time reads out the range -1...-20. This is EM Ref Set 2 from the CHTCR card. 4137 507...556 The pattern is C, C, D, D, E, E, F, F. This pattern is repeated ten times. The first five times reads out the eta range 1...20 and the second time reads out the range -1...-20. This is EM Ref Set 3 from the CHTCR card. 4217 557...5A6 The pattern is 10,10,11,11,12,12,13,13. This pattern is repeated ten times. The first five times reads out the eta range 1...20 and the second time reads out the range -1...-20. This is HD Ref Set 0 from the CHTCR card. 4297 5A7...5F6 The pattern is 14,14,15,15,16,16,17,17. This pattern is repeated ten times. The first five times reads out the eta range 1...20 and the second time reads out the range -1...-20. This is HD Ref Set 1 from the CHTCR card. 4377 5F7...646 The pattern is 18,18,19,19,1A,1A,1B,1B. This pattern is repeated ten times. The first five times reads out the eta range 1...20 and the second time reads out the range -1...-20. This is HD Ref Set 2 from the CHTCR card. 4457 647...696 The pattern is 1C,1C,1D,1D,1E,1E,1F,1F. This pattern is repeated ten times. The first five times reads out the eta range 1...20 and the second time reads out the range -1...-20. This is HD Ref Set 3 from the CHTCR card. (4537) 697 00 NO DATA READOUT (4538) 698 00 NO DATA READOUT 4539 699..7D8 The pattern is 0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F. This is repeated 20 times. This reads out the Hot Tower Table information from the CHTCR cards. (4859) 7D9 00 NO DATA READOUT (4860) 7DA 00 NO DATA READOUT 4861 7DB...7FA The pattern to read the information from the AND-OR card is 0, 1, 2, ..., 1E, 1F. This is the Specific Trigger programming information. 7FB...7FF 00 NO DATA READOUT