User's Manual

Control Code Definitions

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Chapter

6820 Series 80-Column Printer User’s Manual

Vertical Tabs

This set of functions deals with vertical tabs: set tabs, tab to next tab stop,

clear tabs, set tab increments, set tabs in channels, and select a tab channel.

S Tab positions are line numbers, counting from the Top of Form.

S All tabs set beyond the page length are stored, but are not used.

S Any tab set within the SOP range (Skip Over Perforation), during the

time SOP is active, are stored but not used until SOP is canceled.

S If a vertical tab is encountered, and the next tab stop is outside the

printable page area, a form feed is executed placing the print head at the

next Top of F orm.

S All previous tab stops are cleared when new tab stops are set.

S Tab settings are not affected by subsequent changes in line spacing.

Perform Vertical Tab

The contents of the current print buffer are printed first, then the print

position is moved to the next vertical tab stop. If no channel is selected,

then channel 0 is used. T he carriage position is changed to the start of the

next print line. If the vertical tab is performed beyond the last tab position

set or beyond the last line of a form, then a form feed is performed

If no

vertical tabs are defined, then the paper advances one line, using the cur-

rently selected line spacing, without changing the carriage position.

Format

Decimal Hex ASCII

11 0B VT

SetVerticalTabs

The c urrent tabs are reset, and vertical tabs are set up, based on the current

line spacing. Tab settings are not affected by subsequent changes in line

spacing.

Format

Decimal Hex ASCII

27 66 n1 n2 ... nk 0 1B 42 n1 n2 ... nk 00 ESC “B” n1 n2 ... nk NUL

where n1 is the first tab (range of values for tab stops: 1–255), n2 is the

second tab (all tabs must be in ascending order), ... are subsequent tabs

(maximum number of tabs: 16), nk is the last tab to set (any value less

than the previous tab value acts as a terminating character), NUL is the

terminating character. All tab settings with this function are stored in

channel 0.