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tutorials:forth [2022/01/08 12:42] papa |
tutorials:forth [2022/06/07 02:10] rcs correct lack of space after dot commands in examples |
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[[http:// | [[http:// | ||
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+ | There are two Forth implementation available. | ||
**FORTH-10** is a Forth language interpreter included in the Panda TOPS-20 distribution. The anonymous programmer describes the implementation as "NOT totally standard" | **FORTH-10** is a Forth language interpreter included in the Panda TOPS-20 distribution. The anonymous programmer describes the implementation as "NOT totally standard" | ||
- | ====== Survival Guide ====== | + | **FORTH** is another interpreter originally written on the MIT AI lab DEC-20 called OZ, by John Wilson. |
- | Start the interpreter on TWENEX with the command '' | + | ====== |
- | | + | Start the interpreter on TWENEX with the command '' |
+ | |||
+ | | ||
FORTH-10 | FORTH-10 | ||
Ok | Ok | ||
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7 3 Ok ( Push 7 then 3 on stack. ) | 7 3 Ok ( Push 7 then 3 on stack. ) | ||
+ Ok ( Remove two items from stack (3 and 7), push the sum on stack, so 10 is only item. ) | + Ok ( Remove two items from stack (3 and 7), push the sum on stack, so 10 is only item. ) | ||
- | .10 Ok ( Word . pops top stack item and prints it. Stack is now empty. ) | + | . 10 Ok ( Word . pops top stack item and prints it. Stack is now empty. ) |
| | ||
Words '' | Words '' | ||
3.14159 Ok | 3.14159 Ok | ||
- | f.3.14159 Ok ( f. pops stack and displays as floating-point. ) | + | f. 3.14159 Ok ( f. pops stack and displays as floating-point. ) |
| | ||
Add new words to the dictionary with the defining words '':'' | Add new words to the dictionary with the defining words '':'' | ||
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( previous top value, multiply and push product on stack. | ( previous top value, multiply and push product on stack. | ||
7 TIMES5 Ok ( Execute the word. ) | 7 TIMES5 Ok ( Execute the word. ) | ||
- | .35 Ok ( Pop and display result. ) | + | . 35 Ok ( Pop and display result. ) |
| | ||
List words currently defined in the dictionary with '' | List words currently defined in the dictionary with '' | ||
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Forth source files can be prepared with any editor. Load and interpret source files in FORTH-10 with the command '' | Forth source files can be prepared with any editor. Load and interpret source files in FORTH-10 with the command '' | ||
- | ===== Hello, World! ===== | + | ====== Hello, World! |
: HELLO CR ." " | : HELLO CR ." " | ||
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At start-up, FORTH-10 searches the user's log-in directory for a file named '' | At start-up, FORTH-10 searches the user's log-in directory for a file named '' | ||
+ | |||
+ | ====== FORTH ====== | ||
+ | |||
+ | Start the John Wilson' | ||
+ | |||
+ | @FORTH | ||
+ | FORTH/Oz v1 (JohnW) | ||
+ | ok | ||
+ | | ||
+ | Exit FORTH with the command '' | ||
+ | |||
+ | |||
+ | ====== Reference ====== | ||
+ | |||
+ | //Starting FORTH// is the standard introductory text for the Forth language. | ||
+ | |||
+ | * Leo Brody, //Starting FORTH//. Forth, Inc. https:// | ||
+ |