Texas Instruments 990 User Manual page 54

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When communicating with an IBM 2780, two records pe.- block are allowed for transmitted
data unles.s the multiple record transmission feature is installed on the IBM 2780, which then
allows up to seven records or 400 characters per block.
Examples:
General format: Condensed format:
COMMAND: RB
COMMAND: RB"5*
NUMBER: 5
4.5.1.10 Send Record Lencth Command (SRL). Use the SRL command to specify a record length
value for transmitted data.
General format: Condensed format:
COMMAND: SRL
COMMAND: SRL*record length*
LENGTH: record length
Notes:
The record length may be any decimal or hexadecimal number in the range from one to the
maximum input buffer size.specified in the user parameter table. A hexadecimal number must
be preceded by a greater-than sign
(>).
The send record length specified should take into co'lsideration:
• .Input record size of the local station.
• Output device capabilities of the remote station.
The SRL specified should be equal to or less than the remote terminal's specified receive record
lengths. For fixed length records, both terminals should agree on the record length.
Records transmitted that are longer than the specified length are truncated to the specified
length. The number of records truncated during a transmission is displayed as part of the
transmission complete message.
Paragraph 2.2.16 and table 2-4 provide further information on record length.
Examples:
General format:
Condensed format:
COMMAND: SRL COMMAND: SRL•ao•
LENGTH: 80
4.5.1.11 Send Request Command (SRQ). Use the SRQ command to enable or disable the Send
Request feature. This feature enables a remote station to transmit a message to the local station that
requests that the local station send a specified file to the remote station. The Send Request is
identified by a four-character recognition code. Enabling the SRQ command enables the station
receiving the Send Request to recognize the four-character recognition code and act on the Send
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Digital Systems Group
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