Ithaca PcOS Series 80PLUS Programmer's Manual page 80

Epson Commands
Command Descriptions
Function
ASCII
Hexadecimal
Decimal
Range
Description
Page 70
PcOS Series 80PLUS
Define single user-definable bit-image
GS *
1DH 2AH
<29> <42>
1 ≤ x ≤ 255
1 ≤ y ≤ 48
0 ≤ d ≤ 255
This command defines a single downloaded bit-image using the number of
dots specified by x and y in the RAM buffer area (volatile memory).
The number of dots in the horizontal direction is x x 8.
The number of dots in the vertical direction is y x 8.
If (x x y x 8) exceeds the size of the buffer, the image will be truncated.
d indicates bit-image data. Data (d) specifies a bit printed to 1 and not
printed to 0.
After a downloaded bit-image is defined, it may be saved to the nonvolatile
EEPROM storage buffer using the ESC ' command where it will remain
indefinitely. Otherwise, the image will remain in the RAM buffer where it
is available until ESC @ or ESC & is executed; the printer is reset; or the
power is turned off.
A representation of the format of a downloaded bit-image is depicted
below:
Column one
d1 dy ... ... ....
+1
d2 dy
+2
.... .... .... .... ....
dy
Rev B 4/13/99
Programmer's Guide
x y
x y
x y
MSB
→
....
LSB
× ×
⇐ d(x
y 8)
[EA]
d1...d(x x y x 8)
d1...d(x x y x 8)
d1...d(x x y x 8)
dn