AN-6131API
11
Holt Integrated Circuits
6.
BC High Priority Asynchronous Message Insertion.
Follow the same steps as the previous BC low priority message example but this time Press ‘H’ to
insert a single high priority message. This command is repeatable and the Bus B LED will flash with
each command. Inserted High Priority messages occur upon completion of any in-process message
when insertion is requested.
7.
Command ‘E’ Enumerate Card is reserved for future use.
8.
From a RESET, if the BC is started before enabling the ‘K’ and ‘T’ sequence to display message
traffic, the first message may contain an error. This is normal; this occurs because the RT and MT
are enabled midstream of a message in progress.
9.
The ‘N’ command transmits fifteen commands to RT address 3. Press ‘B’ to enable the RT.
Press ‘N’ to execute the BC transmissions (15 messages are transmitted) which will appear on the
bus as shown below. To optionally see the message traffic on the console, enable the RT message
traffic by pressing ‘T’ if it hasn’t already been enabled.
