TRS-80 character set
The TRS-80 computer manufacturered by Tandy / Radio Shack contains an 8-bit character set. It is partially derived from ASCII, and shares the code points from 32 - 95 on the standard model. Code points 96 - 127 are supported on models that have been fitted with a lower-case upgrade.
The character set consists of letters, various numeric and special characters as well as 64 semigraphics called squots (square dots) from a 2×3 matrix. These were located at code points 128 to 191 with bits 5-0 following their binary representation, similar to alpha-mosaic characters in World System Teletext. These characters were used for graphics in games, such as Android Nim.
Character set
The following table shows the TRS-80 model I character set. Each character is shown with a potential Unicode equivalent. Space and control characters are represented by the abbreviations for their names.
TRS-80 model I character set | ||||||||||||||||
0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | A | B | C | D | E | F | |
0x | BS | LF | CR | con | coff | |||||||||||
1x | カ | 32 | ← | → | ↓ | ↑ | home | sol | ceol | ceof | ||||||
2x | SP | ! | " | # | $ | % | & | ' | ( | ) | * | + | , | - | . | / |
3x | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | : | ; | < | = | > | ? |
4x | @ | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O |
5x | P | Q | R | S | T | U | V | W | X | Y | Z | ↑ | ↓ | ← | → | _ |
6x | a | b | c | d | e | f | g | h | i | j | k | l | m | n | o | |
7x | p | q | r | s | t | u | v | w | x | y | z | { | | | } | ~ | ± |
8x | NBSP | |||||||||||||||
9x | ||||||||||||||||
Ax | ||||||||||||||||
Bx | ||||||||||||||||
Cx | tab | tab | tab | tab | tab | tab | tab | tab | tab | tab | tab | tab | tab | tab | tab | |
Dx | tab | tab | tab | tab | tab | tab | tab | tab | tab | tab | tab | tab | tab | tab | tab | tab |
Ex | tab | tab | tab | tab | tab | tab | tab | tab | tab | tab | tab | tab | tab | tab | tab | tab |
Fx | tab | tab | tab | tab | tab | tab | tab | tab | tab | tab | tab | tab | tab | tab | tab | tab |
- Backspace and erase current character
- Cursor on
- Cursor off
- Toggles Katakana characters (Model III)
- Converts to wide 32 column mode
- Backspace ← Cursor
- Advance → Cursor
- Downward ↓ linefeed
- Upward ↑ linefeed
- Move cursor to (0,0), also turns off 32 column mode
- Move to start of line
- Erase to end of line
- Erase to end of frame
- 192 to 255 are "Space Compression Codes", tabs for 0 to 63 spaces