81 lines
2.8 KiB
Plaintext
81 lines
2.8 KiB
Plaintext
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AST RESEARCH TECHNICAL BULLETIN TB-0262 02/12/87
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DECISION DATA MODEL #5751-01 CLUSTER
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WITH 5250 MODEL 11
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The model #5751-01 from Decision Data claims to emulate an
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IBM model 5294 cluster controller. However with information
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obtained from their technical support group, this is not the
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case. Instead, the Decision Data model #5751-01 should be
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treated as an IBM model 12 remote controller. Incidentally,
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the Decision Data model #5751-01 will not support IBM's
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Displaywrite/3x, which is also true with IBM's model 12
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remote controller.
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This technical bulletin concerns itself with the way the
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Decision Data model #5751-01 handles workstation addressing
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on an IBM System/3x. This unit either has 4 or 8 ports
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depending upon which option was taken. It is important to
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note that port #1 should always be used. The following
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addressing scheme should be used if the Decision Data model
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#5751-01 cluster controller is chosen over the IBM model
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5294 cluster controller:
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Unit Address of Decision Data IBM
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5250 Model 11 Terminals Model #5751-01 System
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and or Emulators Cluster Controller 3X
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04 ------------> 00 Note #1
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00 ------------> 02 Note #2
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**NOTE**
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#1 If the AST5251/11 emulator and or terminal is the very
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first physical device from the Decision Data model
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#5751-01 cluster controller, unit address number 04
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must be used. Please note that a physical device
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was specified. Multiple session support with the
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AST5251/11 Plus, however, will not be supported.
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#2 The very last physical device or the terminator on the
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line must have a unit address of 00.
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The following example will illustrate this addressing scheme
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more clearly:
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Unit Address of Decision Data IBM
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5250 Model 11 Terminals Model #5751-01 System
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and or Emulators Cluster Controller 3X
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04
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(first physical device ------------> 00
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on the line)
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00
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(last physical device ------------> 02
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or terminator on the line)
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01
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(cabled through ------------> 03
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physical device)
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02
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(cabled through ------------> 04
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physical device)
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03
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(cabled through ------------> 05
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physical device)
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05
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(cabled through ------------> 06
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physical device)
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06
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(cabled through ------------> 07
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physical device)
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