How The Input Queue Works; Clearing The Input Queue - Agilent Technologies 8163A Programming Manual

Introduction to Programming
20

How the Input Queue Works

The input queue is a FIFO queue (first-in first-out). Incoming bytes are
stored in the input queue as follows:
Receiving a byte:
1
• Clears the output queue.
• Clears Bit 7 (MSB).
No modification is made inside strings or binary blocks. Outside strings
2
and binary blocks, the following modifications are made:
• Lower-case characters are converted to upper-case.
• The characters 00
(20 ).
16
• Two or more blanks are truncated to one.
An EOI (End Or Identify) sent with any character is put into the input
3
queue as the character followed by a line feed (LF, 0A
with a LF, only one LF is put into the input queue.
The parser starts if the LF character is received or if the input queue is
4
full.

Clearing the Input Queue

Switching the power off, or sending a Device Interface Clear signal, causes
commands that are in the input queue, but have not been executed to be
lost.
Agilent 8163A/B, 8164A/B & 8166A/B Mainframes, Fifth Edition
to 09 and 0B to 1F
16 16 16
Message Queues
are converted to spaces
16
). If EOI is sent
16