Commodore MPS 1200 - Graphics Density

Top
2'
= 128
0
2
6
64
0
2'
32-
0
2'
16
0
2
3
8
0
22
4 .
0
21
2 -
0
2°
1 .
0
Bottom
~
0
This pin isn't used for graphics.
Figure 6-2. Print head numbers (Epson mode).
Why aren't the pins just numbered 1 to 8? Because by using powers
of two, the sum of any combination of pin numbers is a unique
number. In other words, any number from 1 to 255 represents a
unique
combination of pin numbers. Thus, you can print any
combination of pins by sending the ASCII code that corresponds to
the
sum of the pin numbers. For example to print pins 1,2, and 4,
send ASCII 7 (1 + 2 + 4 = 7); to print pins 4, 8, and 64, send
ASCII 76;
and to print all eight pins, send ASCII 255.
Graphics Density
Single Density
Double-Density
High-speed
Double Density
Quadruple Density
Command
chr$(27) "K" chr$(n1)
chr$(n2)
chr$(27)
"L" chr$(n1)
chr$(n2)
chr$(27)
"Y" chr$(n1)
chr$(n2)
chr$(27)
"Z" chr$(n1)
chr$(n2)
6-4
Function
Sets 60 dots per inch, line
length n1 + (256 x n2).
Sets 120 dots per inch, line
length n1 + (256 x n2).
Sets 120 dots per inch, line
length n1 + (256 x n2).
Sets 240 dots per inch, line
length n1 + (256 x n2).