Tally Genicom Matrix Printer - Manual (Page 67)

7265 Programmer’s Manual 63
Copyright © 2004 TallyGenicom Chapter 4 ANSI Oversized
Chapter 4. ANSI Oversized Font
This chapter describes the characteristics and lists the ANSI control sequences for the rotatable
oversized font, a unique sans-serif font with character shapes designed to accommodate very
large expansions. This is an industrial-strength feature. Horizontal resolution is held to 120 dpi to
enable oversized printing at carriage speeds of up to 50 inches per second. Combined with
vertical logic seeking, this enables the 7265 to print complex mixes of character sizes and
rotations at creditable throughputs.
The oversized font is monospaced only. ANSI print modes: bold, underscored, doublewide, and
proportional have no effect. You can print characters 20 hex through 7F hex; characters above
this range are ignored. User-defined character substitutions do not work in oversized, so you
cannot use the IBM line-draw characters. The resident international character substitutions work
the same as in normal text.
In contrast to the oversized function on earlier products, the 7265 interprets escape sequences
and control codes within an oversized string. As of this writing, however, we recommend that you
exit oversized before sending any other control functions.
To maintain compatibility with existing printers, the 7265 printer does not back paper up to print
oversized characters on the current baseline. If you enter an oversized mode and immediately
print one character, then the top of the character is at the vertical position that was current when
you entered oversized. This is no problem if all characters on a line are the same size. To mix
oversized with either normal type or with different expansions on the same baseline, however,
you will need to write a routine to find the baseline. We cover this later in this chapter.
Some of the oversized control sequences are redundant. The nonrotatable controls that let you
optionally toggle oversized with SHIFT OUT and SHIFT IN are retained for compatibility with older
printers. You could reasonably choose to use only the escape sequences for rotatable oversized
(ESC [(Ps)| ) for new applications.