VT100.net: Digital VT220 Programmer Reference Manual

Table 4-9 DECDLD Parameter Characters

Parameter

Name

Description

Pfn

Font number

Selects the DRCS font buffer to load. The VT220 has only one DRCS font buffer. This parameter has two valid values, 0 and 1.

Pcn

Starting character number

Selects starting character to load in DRCS font buffer. For example, parameter value 1 specifies a column 2/row 1 character; parameter 94 specifies a column 7/row 14 character (Table 2-1).

Erase control

Selects which characters are erased before loading.

0 =	erase all characters in this DRCS set.
1 =	erase only the characters that are being reloaded.
2 =	erase all characters in all DRCS sets (this font buffer number and other font buffer numbers).

Pcms

Character matrix size

Defines the expected limit of the character matrix size.

0 = Device default (7 × 10)
1 = (not used)
2 = 5 × 10
3 = 6 × 10
4 = 7 × 10

Width attribute

Specifies the width attribute.

0 = Device default (80 columns)
1 = 80 columns
2 = 132 columns

Text/ full-cell

Allows software to treat the font as a text font or a full-cell font.

0 = Device default (text)
1 = Text
2 = Full-cell (not used)

Full-cell fonts can individually address all pixels in a cell, while text fonts, in general, may not be able to individually address all pixels.