User`s manual

8–16 IBM Proprinter Emulation
Bit Image Mode, Quadruple Density
ASCII Code ESC Z n1 n2
Hex Code 1B 5A n1 n2
Dec Code 27 90 n1 n2
Expression CHR$(27);”Z”;CHR$(n1);CHR$(n2);”DATA”
Purpose Selects Quadruple Density Bit Image graphics.
where n1 + 256 n2 define the number of data bytes to follow.
DATA = ASCII characters for the dot pattern bytes.
Discussion This code can occur at any place in the datastream and is acted upon
immediately. Print speed is reduced by half. For detailed information, see
“Graphics,” page 8–5.
Example The following example produces quadruple density graphics of the
pattern used in the Single Density Bit Image Mode example. Note that
the amount of data must be quadrupled for quadruple density (the data is
used 108 times rather than 27). Depending on the host computer system,
it may be necessary to include a width statement within the BASIC
program.