IBM 3151 User Manual page 113

Reference Information (emulation)
Dynamically Re-c:leflnable Character Set
The dynamically re-definable character set (DRCS) is a set of 94 characters that
you can create for your own purposes. You can load them into the display
station from the host system or the keyboard by using the DECDLD device
control string.· You can use this function also in emulation mode, but two
differences exist because of the different sizes of a cell! between the DEC VT220
and the 3151. They are:
• Designing a DRCS character
• Loading a DRCS character.
Designing Your ORCS Characters
The 3151 uses 8 dots in width and 15 dots (24-row mode) or 14 dots (25-row
mode) in height to display each character. The area represented by these dots is
called a cell. Figure 5-2 shows a cell used in the 315l. The DEC VT220 uses an
8 by 10 dot arrangement for each cell. Figure 5-3 on page 5-5 shows a cell used
in the DEC VT220.
12345678
100000000
200000000
300000000
400000000
500000000
800000000
700000000
800000000
900000000
1000000000
1100000000
1200000000
1300000000
1400000000
1500000000
18 00000000
Figure 5-2. Cell Used in the 3151
A
cell
is a box area in which specified dots exist to
form
a character.
5-4
User's Guide for the Cartridge to Emulate IBM and DEC Terminals