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Page 7-5SCS DATA STREAMS
T1-TN The line numbers of the vertical tab stop settings, if any.
Valid tab stops are greater than or equal to TM and less than
or equal to BM. The tab stops must be listed in ascending
order.
Note: All parameters are single byte binary numbers.
Transparent (TRN) — 35h
The Transparent command indicates the start of transparent data. This data
is not scanned for SCS control codes. The command is followed by a count
byte that indicates the number of bytes of transparent data to follow.
Note: This command can be disabled by setting the configuration of Option
#60 to a value of 00.
The command has the following format:
(TRN)(CNT) Where:
TRN is the Transparent command code 35h.
CNT is a single binary byte denoting the number of bytes in the
transparent block. The Count value does not include the
count byte.
The Transparent command is especially important because it gives the user
the ability to generate any possible 8 bit command or data byte to be output
to the attached device. Many of the extended 8 bit ASCII command codes
used by printers and plotters must be transmitted as transparent data streams
because they cannot be generated or passed through the IBM system
without being modified. Each byte of data is sent to the printer without
translation. For example, the following 8 bit EBCDIC codes are the RESET
command for a Xerox laser printer:
35031B2B58
35 is the transparent command code, 03 is the count of the data bytes to be
sent to the attached device, and 1B, 2B and 58 are the three bytes to be sent
to the attached device.
Vertical Tab (VT) — 0Bh
The Vertical Tab command moves the presentation position down to the
next vertical tab stop position. The vertical tab stops are determined by the
Set Vertical Format command. If no vertical tab stop exists below the
current line, the VT is treated as a line feed.