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n5 determines the character mode to be downloaded,
shown below:
as
n5 Character mode
Character width
o
Draft
9
1 LQ pica
35
2
LQ proportional
17 to 41
3
LQ ellte
29
ml through m9 indicate Index Table data.
ml and M2 indicate the address where Dot Pattern is
stored.
ml is the high-order byte. m3 indicates the num-
ber of columns in the character memory, and
m4 indi-
cates the number of columns in the character.
m5 through
m9 are compression mask bits. Data com-
pression allows the efficient use of memory in storing
downloaded characters providing space for more charac-
ters than would be available without compression. The
printer repeats the previous dot column in the current
column when the current column compression mask bit
is set to 1.
It is necessary to define all of Index Table data before
the Dot Pattern data to download many characters.
dl, d2, ... dx is the Dot Pattern data being downloaded.
Each data byte indicates eight vertical dots, with the
most significant bit being the top dot, and the least sig-
nificant bit being the bottom dot.
Copy characterset from ROM into RAM
MODE
ASCII
Decimal Hexadecimal
Std.
<E SC> “ : “ <0> n <o> 27 58
0 r] o : 3 3A 00 n 00
Copies the character set selected by n, as shown below,
to the corresponding download character RAM area,
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