gtpn1m0lNon-SNA Data Communications Reference

External Input and Output

Legend:

BCI
Block Check Indicator

CCC
Cyclic Check Character

CCT
Character Count

CR
Carriage Return

ECB
Entry Control Block

EOM
End of Message

IA
Interchange Address

LF
Line Feed

LN
Line Number

NU
Not Used

SEG
Segment

SLN
Symbolic Line Number

TA
Terminal Address

Set Input/Output

Incoming Messages

The high-speed message editors handle the following types of incoming messages:

  1. EBCDIC input from 3270 local terminals:




    Note:
    TEXT includes command byte first and can include 3270 cursor address and
    orders.

  2. Automation gateway input message to TPF:




    Where:

    xx
    EBCDIC hexadecimal digits ranging from 00 and 02 through the maximum terminal address specified in your IBM Extended Operations Console Facility/2 configuration.
Note:
For additional information on the maximum terminal address, see the IBM Extended Operations Console Facility/2 System Administrator's Guide.

EBCDIC output to other packages for the previously illustrated formats:




Note:
TEXT can have terminal control characters included in it. All translation control characters are deleted during translation.

Outgoing Messages

EBCDIC input from packages or the Message Router at the point of transmission to 1977, 2915, 4505, and 3270 terminals, and the automation gateway:




Note:
TEXT can have terminal control characters. For 3270 Local, the TEXT must start with the appropriate 3270 command followed by a Write Control Character (WCC) as a minimum.

This previously illustrated format is transformed upon output to one of the following formats:

  1. EBCDIC output for 3270 local terminals:




    Note:
    WCC is the 3270 Write Control Character and the output message can contain
    only a WCC. If TEXT is included, it can contain 3270 orders.

  2. Automation gateway output from TPF:




    Where:

    xx
    TA converted to EBCDIC hexadecimal digits ranging from 00 and 02 through the maximum terminal address specified in your IBM Extended Operations Console Facility/2 configuration.

    bbbb
    EBCDIC hexadecimal digits representing functional support console (FSC) indicators used to route messages to specialized consoles. Multiple FSC indicators can be set.

    Possible FSC indicators as defined in RTCEQ are shown in the following table.

    Table 1. FSC Indicator by Type

    FSC Type FSC Indicator
    RO CRAS (Receive Only CRAS) 8000
    PRC (Prime CRAS) 4000
    Tape 2000
    DASD 1000
    Communications 0800
    AUDT (Audit Trail) 0400
    Relational Database 0200
    9 additional user-defined functional support consoles 0100-0001
Note:
For additional information on the maximum terminal address, see the IBM Extended Operations Console Facility/2 System Administrator's Guide.

Synchronous Link Input/Output

For a complete description of message formats see Synchronous Link Control Functional Specification and Synchronous Link Control Link Trace Package.

BSC Input/Output

See TPF Operations for a description of BSC message formats.

3270 Local Input/Output

See TPF Operations for a description of 3270 local message formats.