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The characters included the 96 printable ASCII characters, 67 Display Controls, 32 DEC Special Graphics, and a backward question mark used to represent undefined characters. The VT200s included the ability to make minor changes to the character set using the National Replacement Character Set (NRCS) concept.
The National Replacement Character Set (NRCS) was a feature supported by later models of Digital's (DEC) computer terminal systems, starting with the VT200 series in 1983. . NRCS allowed individual characters from one character set to be replaced by one from another set, allowing the construction of different character sets on the
The Multinational Character Set (DMCS or MCS) is a character encoding created in 1983 by Digital Equipment Corporation (DEC) for use in the popular VT220 terminal. It was an 8-bit extension of ASCII that added accented characters, currency symbols , and other character glyphs missing from 7-bit ASCII.
DEC Special Graphics [1] is a 7-bit character set developed by Digital Equipment Corporation.This was used very often to draw boxes on the VT100 video terminal and the many emulators, and used by bulletin board software.
It is based on the 1983 DEC Multinational Character Set (MCS) for VT220 terminals. As such, LICS is also similar to two other descendants of MCS, the ECMA-94 character set of 1985 [1] and the ISO 8859-1 (Latin-1) character set of 1987. LICS was first introduced as the character set of Lotus 1-2-3 Release 2 for DOS in 1985.
The VT420 has a total of 5 sets of 94 characters for normal VT operation, another 3 sets of 128 PC characters, and 1 set of 96 characters containing various graphics and math symbols. Like all models since the VT200 series , the user can also upload a custom character set of their own design using the Sixel system.
Printable version; In other projects ... Pages in category "Character-oriented terminal" ... VT220; VT420; VT520
The 300 series replaced the earlier VT200 series, as a lower-cost system better able to compete with a number of VT220 clones that had entered the market. Foremost among these was the Wyse WY-60 , [ citation needed ] introduced in 1986 with a form factor and feature set similar to the VT220, but including 4010 graphics and selling for only $699 ...