Compuprint MDP40B Programmer Manual - Manual (Page 38)

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HT
Horizontal Tab.
(IBM Proprinter XL24/XL24E, 2391+, 4722, 9068, EPSON ESC/P2)
ASCII Code HT
Hexadecimal Value 09
Decimal Value
9
This code moves logically the print carriage to the next horizontal tab stop as defined
by ESC D.
In IBM mode, up to 28 horizontal tab stops can be set. The HT code is ignored if no tab
stop has been set or if the current print carriage position has moved past the last tab
position or if the tab stop is on or beyond the right margin. At power on, the tab stops
are set every eight columns (default). The horizontal tab stops can be changed by the
ESC D command.
In EPSON mode, up to 32 horizontal tab stops can be set. The default tab stops are
memorized as logical position in the page, so that are affected by changing the
horizontal spacing. The tab stop positions set by ESC D are memorized as physical
position in the page and therefore they are not affected by changing the horizontal
spacing. When the double width printing is selected, the tab stop setting must take
account that each character occupies two columns. Character scoring (underline,
overscore and strikethrough) is not printed between the current print position and the
next tab when this command is sent.