Epson FX-80 User Manual page 45

CHR$(15) - Compressed Mode selection
On the MX III, prints 132 characters per 8-inch line.
On the FX-80 and RX-80, prints 132 characters per 8-inch line, but
can print 137 characters if the right margin is changed. On the FX-100
and RX-100 prints 233 characters per 13.6-inch line.
CHR$(17) and CHR$(19) - Printer selection
On the FX only and only with DIP switch 2-1 off, turns printing on
and off. When CHR$(19) is in effect, the printer ignores all output.
CHR$(24) - Cancelling text
On the FX and RX-100 only erases all text from the buffer; does not
erase control codes from the buffer.
ESCape " ! " - Master Print Mode selection
On the FX only, selects one of 16 print mode combinations. Any
one of these may also be combined with other print modes.
Escape"#" , " > " and " = " - MSB control
On the MX III and the FX, these three codes allow 7-bit system users
to print high-order control codes by manipulating the most significant
bit.
ESCape " % " , " : ', and " &" - Custom character definition
On the FX only, lets you design your own characters and store them
in RAM. You can use them alone or in combination with the standard
FX characters.
Escape "*" - Special Graphics Mode selection
On all three models, ESCape"K" and "L" provide two Graphics
Modes.
On both the FX and the RX, Escape"*" adds four more graphics
densities: 80, 90, 120, and 140 dots per inch.
On the FX only, adds a fifth, 72 dots per inch.
ESCape " - " - Underlining
On all three models, the underline character is five dots wide.
On the MX-III, this code dumps the buffer and, when a space is
placed at the beginning or end of a line, the printer ignores it.
On the FX, the underline code does not empty the buffer and spaces
can occur (and thus be underlined) at the beginning or end of a line.
On the RX, the underline code does dump the buffer and spaces can
occur (and thus be underlined) at the beginning or end of a line.