Texas Instruments 990 User Manual page 55

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Request. When the SRQ command is disabled, the four-character recognition code is treated as data.
· Refer to paragraph 4.5.3.3 for further information.
General format:
COMMAND: SRQ
OPTION:
Examples:
General format:
COMMAND:
SRQ
OPTION:
ON
COMMAND: SRQ
OPTION:
OFF
Condensed format:
Condensed format:
COMMAND: SRQ*OFP
4.5.1.12 Transparency
Comman~
(TY). Use the Transparency command to enable or disable
transparency for transmitted . data. Enabling transparency enables the Emulator to transmit the
entire ASCII character set as data.
General format: Condensed format:
COMMAND: TY
•
OPTION:
Notes:
With transparency off, only a restricted set of ASCII characters (translated to EBCDIC) may
be transmitted. With transparency on, the full set of ASCII characters, including control
characters (translated to EBCDIC) may
be
transmitted. Refer to Appendix G for a list of the
characters transmitted with transparency off.
Transparency on is not sufficient for transmission of binary data. Refer to paragraphs 4.5.3 and
4.5.4 for information on transmitting/receiving binary data.
Selection of transparency/ nontransparency affects only transmitted data; the Emulator
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operates properly for any state of received data.
When EBCDIC transparency is enabled for the Emulator, any specification of space
compressionj expansion or end of media will
be
ignored (i.e., compression/ expansion and end
of media only apply to non•ransparent data).
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Digital Systems Group