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chapter 4
EMULATIONS
AND ESCAPE CODES
EMULATIONS
The printer has two emulation modes: standard mode and IBM mode.
In standard mode, the printer emulates the functions of the Epson EX-800
and EX- 1000 printers. Additional command codes am included as a superset
of these emulations.
In IBM mode, the printer emulates the IBM Proprinter II. Additional
command codes are included as a superset of these emulations.
The emulation is changed by means of DIP switch 1. When ON, the printer
will be in standard mode, and when OFF, the printer will be in IBM emula-
tion mode (see Chpter 5). It is not possible to change the emulation mode by
means of software control or the front panel controls.
NOTE
Remember to turn off the printer before making any DIP switch changes. 1
NUMERICAL REPRESENTATION
When in either standard or IBM mode, any numerical parameters taken by
command sequences are usually binary rather than ASCII numerical values.
In this manual, any ASCII values will be represented in quotes, eg "21" will
represent the ASCII string 32h concatenated with 31h (in BASIC,
CHR$(SO)+CHR$(S 1)). Usually in these examples, however, hexadecimal
values wilI be quoted, as shown by the lowercase "h" following the number,
eg 32h.
Binary numbers over FFh am obtained by dividing the number into two
bytes, the first being the low byte, and the second being the high byte. In this
way, the value 123h will be divided into the two following bytes: 23h and
Olh.
If negative numbers are required, they are obtained by subtracting the
absolute value of the negative number from 65536 (lOOOOh), and dividing
the result into high and low bytes. For instance, to represent the number - lOh,
the following operation is carried out:
23
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