6100 MPS-B Programming Manual

WRITING APPLICATIONS THAT USE 6100 MPS-B
Define Poll/Select List
The Poll/Select list length is derived using the following
formula:
Length = Number of Stations * (p + s) + 4
The Poll/Select entry for each station should have a sequence
header in the following form:
EOT prefix optional-type-id ENQ
prefix Station identifier
optional-type-id Optional Poll or Select type identifier
For Burroughs or Lear-Siegler terminals, the entry should be
formatted:
EOT a1 a1 p ENQ -poll entry
EOT a1 a1 q ENQ -select entry
a1 is the station address character. For Burroughs and
Lear-Siegler terminal Poll/Select entries, this
character must appear in duplicate.
For NCR terminals, the entry should be formatted:
EOT a1 ENQ
a1 is the station address character (bit 5 determines
whether this is a Poll or Select entry).
A station Poll entry can be disabled by setting the most
significant bit in the entry’s first byte to 1. This is helpful
if you want to maintain list order consistency while changing the
poll state of individual stations.
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