Tally Genicom Matrix Printer - Manual (Page 148)

Relationship between bits of graphics data and needles (9 needle version)
Each needle in a column is assigned a bit of the data byte.
Needle Data Byte 1
1
•
Bit 7
2
•
Bit 6
3
•
Bit 5
4
•
Bit 4
5
•
Bit 3
6
•
Bit 2
7
•
Bit 1
8
•
Bit 0
Relationship between bits of graphics data and needles (24 needle version)
When using 24-pin graphics modes, three bytes of data are required for each dot column.
Needle Data Byte 1 Needle Data Byte 2 Needle Data Byte 3
1
•
Bit 7 9
•
Bit 7 17
•
Bit 7
2
•
Bit 6 10
•
Bit 6 18
•
Bit 6
3
•
Bit 5 11
•
Bit 5 19
•
Bit 5
4
•
Bit 4 12
•
Bit 4 20
•
Bit 4
5
•
Bit 3 13
•
Bit 3 21
•
Bit 3
6
•
Bit 2 14
•
Bit 2 22
•
Bit 2
7
•
Bit 1 15
•
Bit 1 23
•
Bit 1
8
•
Bit 0 16
•
Bit 0 24
•
Bit 0
Graphics 65