Tally T5023+ Programming Manual page 205

Additional commands (Printer) Basic commands for document processing
Function:
For document processing, two commands are available for the absolute vertical
positioning (y co-ordinates) of the write head on a form. Generally, both com-
mands, after transfer to the printer, are valid for effecting the output of the cha-
racters still situated in the print buffer. The requested vertical movement is then
carried out mechanically when new write operations are executed at the docu-
ment printing point.
The following differences are to be noted for the two commands for absolute ver-
tical positioning:
– With the absolute vertical positioning in relation to the upper edge of the form
(CSI n ! p), the spacing is specified in n/180 inch from the upper edge of the
form to the base line of a line.
– With the absolute vertical positioning in relation to the lower edge of the form
(CSI n " p), the spacing is specified in n/180 inch from the lower edge of the
form to the base line of a line.
For these commands the printing unit of the document printer is fitted with equip-
ment for the detection of the edges of the form.
The 'base line of a line' is defined in the section "Important notes on do-
i
cument processing".
T5023/5023+ - Programming Guide
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