Analyzer entry points

Entry points

Analyzer entry point (hex)

Processing description

1

Process an input segment from a terminal.

2

Perform a logical read operation to the terminal.

3

Determine which system function is to be performed next for this line and terminal (or node).

4

Issue a GET NEXT call to message queue.

5

Perform a logical write operation to the terminal.

6

WRITE successful; dequeue message or call the device-dependent module at DD1.

7

Notify master terminal of I/O error; cancel input; return output message to queue.

8

Return output message to queue; cancel input.

9

Generate an error message; cancel input; return output message to queue.

A

Idle the line; cancel output; return output message to queue.

B

Resend the last message sent from a given logical terminal (LTERM).

C

Idle the line.

The low-order 2 bytes of register 0 identify the entry points for the device-dependent modules (DDMs), as listed below:

DDM entry point (hex)

Processing description

1

WRITE/SEND setup: Set up output buffer to write current buffer.

2

WRITE/SEND interruption: Error check last output operation.

3

READ/RECEIVE setup: Set up to perform a poll or read.

4

READ/RECEIVE interruption: Error check, determine terminal responding, and deblock input segment.

5

Cleanup: Restore control blocks after DFSICI00 error.

6

Build: Move output message from a queue buffer (MFS buffer) to a line buffer.

7

Logon: VTAM® OPNDST/CLSDST processing.

8

Prepare for output: VTAM

F

MFS output format control (DFSCOFC0) was entered.