Figure 1 Single-Wide Character Cell; Figure 2 Character Forming - Ithaca 150 Programmer's Manual

Programmer's Guide
The following illustration shows a single-wide character cell.
1 3
1
2
3
4
5
6
7
8
9
Character
Spacing

Figure 1 Single-wide character cell

The example above, which only holds true for the 12 cpi mode, shows the full dots as
adjacent to each other in the character cell. The 10 cpi mode allows a gap between adjacent
full rows; 17 and 24 cpi allow an overlap of full rows. The printer cannot print adjacent full
and half dots in any single row. Some graphics (double-density, half-speed) allow adjacent
rows to be printed by slowing the print speed by half. Slowing the print speed allows the time
between half and full columns to be the same as the time between full columns in full-speed
operation.
The following illustration shows the use of full and half dots as well as descenders to form
characters.
1 3 5 7
2 4 6
1
2
3
4
5
6
7
8
9

Figure 2 Character forming

12/14/99
PcOS Series 150
5 7 9
2 4 6 8 10
High Speed Draft
9
1 3 5 7 9
8 10
2 4 6 8 10
Rev G
General Specifications
1 3 5 7 9 11
2 4 6 8 10 12
1
2
3
4
5
6
7
8
9
Character
Spacing
Utility Mode
1 3 5 7 9
2 4 6 8 10
Full Dots
Half Dots
Descender (Row 8 & 9)
& Underline (Row 9)
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