Star StarJet SJ-48 User Manual page 67

DOWNLOAD CHARACTER COMMANDS
Define 24-dot download characters
27 38 0
nl
IB 26 00 nl
Std.
n2 mO ml m2 n2 mOml m2 n2 mOml m2
dl d2 al dl d2 dx dl d2 .,. &
Clears the 48-dot download characters and defines one or more new 24-dot
characters and stores them in RAM for later use. DIP switch 2 must be set to OFF;
otherwise RAM is used as an input buffer, not downloading characters, and this
command is ignored.
nl is the character code of the first character defined and n2 is the character code
of the last character defined. nl must be equal to or less than n2.
The data for each character start with three bytes specifying proportional spacing
attributes: the first byte,
mO,
specifies the left of the character; the second byte,
ml,
specifies the character width; the third byte, m2, specifies the right of the character.
These values must not exceed the following maximum limits:
Character mode
ml mO+ml +m2
Pica 31 36
Elite 27 30
Semi-condensed
19 24
Proportional 37 42
Super/Subscript
19 36
Prop. superlsubscript
37
42
Next comes the dot data. Normal character height is 24 dots, so there must be 3 x
ml
bytes of dot data. If the printer is in super/subscript mode, however, the
character height is 16 dots, so there must be 2 x ml bytes of dot data.
Each data byte indicates eight vertical dots, with the most significant bit being the
top dot, and the least significant bit being the bottom dot.
For further details, please refer to chapter 7.
Chapter6 PRINTER CONTROL COMMANDS 61