commit 800492948cf370a528ab241aecc19aa120a0df6b
parent d100756d41f37b09855de3986c4d09954fdcf02a
Author: Ville-Matias Heikkila <viznut@low.fi>
Date: Tue, 14 Jun 2022 12:22:50 +0300
formatting
Diffstat:
1 file changed, 9 insertions(+), 9 deletions(-)
diff --git a/character_terminal.mdwn b/character_terminal.mdwn
@@ -40,15 +40,15 @@ Problems:
Some technical vocabulary:
-* ANSI X3.64 is a ~1976 control sequence standard for character-based video terminals. It was criticized for being too complicated for "dumb" hardware and thus requiring a microprocessor. One of the complications was the use of ASCII decimal numbers as command parameters (earlier terminals had used single bytes instead).
-* VT100 and VT102 are physical, microprocessor-based text terminals manufactured by Digital Equipment Corporation in around 1978-1983. They became the de-facto reference implementation of the ANSI standard.
-* ANSI.SYS on the [[IBM PC]] is another influential implementation of the standard. Notably, it supports the cell-specific foreground and background colors of the CGA-compatible display controllers. "Ansi art" therefore usually refers to art made for the IBM PC textmode, including the non-standard pseudographic characters featured in the IBM PC character set.
-* ECMA 48 (the last version is from 1986) is a later standard that extends on the X3.64. It defines ANSI.SYS-style colors but also some potentially useful features that are very rarely supported in today's terminal emulators (such as a support for multiple pages and editable areas).
-* Text mode is a hardware feature of a display controller, allowing the representation of the screen as character indexes rather than individual pixels. The pixel matrices of each character are fetched from a separate character memory (which can be ROM or RAM or both). Physical text terminals, most 8-bit microcomputers and IBM PC compatibles have a hardware textmode. In the game console world, equivalent display modes are referred to as "tile-based". Sometimes, a text mode is simulated in software (e.g. the framebuffer console on Linux)
-* CLI (command-line interface) is based on typed commands. CLIs have been around since the teleprinter days.
-* CUI and TUI (character-based UI, text-based UI) are a more graphical type of character-based interface. They may have things like status bars, cursor-navigable menus and even windowing or mouse support. A lot of work and standardization on CUI/TUI took place in the [[IBM PC]] world. Unfortunately, many of the common CUI/TUI approaches are somewhat prohibitive on low-bandwidth character terminals.
-* Telnet is a protocol for non-encrypted terminal connections over a TCP/IP network. SSH is a protocol for encrypted ones (and therefore recommended in nearly all circumstances). The easiness to sniff the network for Telnet passwords was the major reason why SSH was adopted.
-* Pseudographics refers to characters that have been intended for drawing crude graphical images rather than representing text. Some of these are intended for drawing of box frames (e.g. U+2500..U+257F in Unicode), while others are for simulating low-resolution pixel framebuffers (e.g. U+2580..U+259F). [[UNSCII]] is a font that attempts to implement Unicode and legacy pseudographics as completely as possible.
+* **ANSI X3.64** is a ~1976 control sequence standard for character-based video terminals. It was criticized for being too complicated for "dumb" hardware and thus requiring a microprocessor. One of the complications was the use of ASCII decimal numbers as command parameters (earlier terminals had used single bytes instead).
+* **VT100** and **VT102** are physical, microprocessor-based text terminals manufactured by Digital Equipment Corporation in around 1978-1983. They became the de-facto reference implementation of the ANSI standard.
+* **ANSI.SYS** on the [[IBM PC]] is another influential implementation of the standard. Notably, it supports the cell-specific foreground and background colors of the CGA-compatible display controllers. "Ansi art" therefore usually refers to art made for the IBM PC textmode, including the non-standard pseudographic characters featured in the IBM PC character set.
+* **ECMA 48** (the last version is from 1986) is a later standard that extends on the X3.64. It defines ANSI.SYS-style colors but also some potentially useful features that are very rarely supported in today's terminal emulators (such as a support for multiple pages and editable areas).
+* **Text mode** is a hardware feature of a display controller, allowing the representation of the screen as character indexes rather than individual pixels. The pixel matrices of each character are fetched from a separate character memory (which can be ROM or RAM or both). Physical text terminals, most 8-bit microcomputers and IBM PC compatibles have a hardware textmode. In the game console world, equivalent display modes are referred to as "tile-based". Sometimes, text mode is simulated in software (e.g. the framebuffer console on Linux)
+* **CLI** (command-line interface) is based on typed commands. CLIs have been around since the teleprinter days.
+* **CUI** and **TUI** (character-based UI, text-based UI) are a more graphical type of character-based interface. They may have things like status bars, cursor-navigable menus and even windowing or mouse support. A lot of work and standardization on CUI/TUI took place in the [[IBM PC]] world. Unfortunately, many of the common CUI/TUI approaches are somewhat prohibitive on low-bandwidth character terminals.
+* **Telnet** is a protocol for non-encrypted terminal connections over a TCP/IP network. SSH is a protocol for encrypted ones (and therefore recommended in nearly all circumstances). The easiness to sniff the network for Telnet passwords was the major reason why SSH was adopted.
+* **Pseudographics** refers to characters that have been intended for drawing crude graphical images rather than representing text. Some of these are intended for drawing of box frames (e.g. U+2500..U+257F in Unicode), while others are for simulating low-resolution pixel framebuffers (e.g. U+2580..U+259F). [[UNSCII]] is a font that attempts to implement Unicode and legacy pseudographics as completely as possible.
See also:
* [[Character sets]] (-> ASCII, Unicode etc)
