JR-BASIC
Developer | Matsushita Communication Industrial Co., Ltd. |
|---|---|
| First appeared | 1981 |
| Stable release | 5.0
|
| OS | Matsushita JR series |
| Dialects | |
| BASIC | |
| Influenced by | |
| Microsoft BASIC | |
| Influenced | |
| None | |
JR-BASIC is a dialect of the BASIC programming language running on the Matsushita JR series of microcomputers.[1]
Although it's its own dialect, it was designed to be mostly compatible with Microsoft BASIC. Since it was developed for low-cost entry-level machines, it featured as few functions as possible, in order to save computer resources. Nevertheless, the interpreter was intended to be compact and efficient, with a feature-rich screen editor supporting direct execution of BASIC instructions.
Commands were input by keywords[2] - by pressing a combination of control and alphabet keys, a full command word would be entered. This was faster and more comfortable than typing words letter by letter, as the computer keyboard was poor (chiclet keyboard).
JR-BASIC 1.0
JR-BASIC 1.0 is the original version present on the JR-100 computer, released in 1981,.[3]
Specifications
| Constants | Integer (-32767 to +32767); Hexadecimal; String |
|---|---|
| Integer variables | Alphabet or alphabet + number (ex: A, B1)
|
| String variables | Alphabet + $ (ex: D $, W $); Up to 32 characters
|
| Arrays | One dimension (ex: E (5)); Two dimensions (ex: F (X, Y))
|
| Calculations | Addition (+), Subtraction (-), Multiplication (*), Division (/), Remainder (MOD) |
| Commands and Statements | AUTO, BEEP, CLEAR, CLS, CONT, DATA, DIM, END, FIND, FOR - NEXT, GOSUB - RETURN, GOTO, HCOPY, IF - THEN, INPUT, LET, LIST, LLIST, LOAD, LOCATE, LPRINT, MLOAD, MSAVE, NEW, OPTION, PICK, POKE, PRINT, READ, REM, RESTORE, RUN, SAVE, STOP, VERIFY
|
| Functions | ABS, ASC, CHR $, FRE, FLD, HEX $, HPOS, VPOS, LEFT $, LEN, MID $, MOD, PEEK, RIGHT $, RND, SGN, SPC, TAB, USR, VAL
|
| Line numbers | 1 to 32767 |
Keyboard commands
Key combinations allowed the user to enter commands and control the onscreen basic interpreter.[2]
| Standard input key | Control mapping |
|---|---|
| 1 | (HOME) |
| 2 | VERIFY
|
| 3 | SAVE
|
| 4 | LOAD
|
| 5 | (DELETE) |
| 6 | (←) |
| 7 | (↓) |
| 8 | (↑) |
| 9 | (→) |
| 0 | (INSERT) |
| – | (RUBOUT) |
| Q | GOSUB
|
| W | RET
|
| E | END
|
| R | RUN
|
| T | THEN
|
| Y | LOCATE
|
| U | IF
|
| I | INPUT
|
| O | OPTION
|
| P | PRINT
|
| A | AUTO
|
| S | STOP
|
| D | DIM
|
| F | FOR
|
| G | GOTO
|
| H | POKE
|
| J | RND (
|
| K | READ
|
| L | LIST
|
| ; | CHR $ (
|
| : | REM
|
| Z | (L.INS) |
| X | (CANCEL) |
| C | (BREAK) |
| V | (GRAPH) |
| B | HCOPY
|
| N | NEXT
|
| M | CLS
|
| , | DATA
|
| . | PEEK (
|
JR-BASIC 5.0
The JR-200 model, released in 1983,
See also
- Matsushita JR series
- List of BASIC dialects
- List of BASIC dialects by platform
References
- ^ "JR-100". 計算機室. May 28, 2017.
- ^ a b "Operating Instructions - Personal Computer JR-100U" – via Internet Archive.
- ^ "OLD-COMPUTERS.COM : The Museum MATSUSHITA National JR 100". www.old-computers.com.
- ^ "Creative Computing Magazine (May. 1983) Volume 09 Number 05". May 10, 1983 – via Internet Archive.