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Table of Contents
APL-20 PANDAMONIUM REIGNS!
APLSF (System Function) is an implementation of the APL programming language for TOPS-20 that is available on TWENEX.
In and Out
To start the APL interpreter, type the following from EXEC:
@APLSF
At the terminal.. prompt, enter tty for a non-APL keyboard.
Leave APLSF by entering one of the following commands (APLSF converts all alphabetic input to upper-case):
)MON | Terminate APLSF and return to EXEC. |
)OFF | Terminate APLSF and log out of TWENEX. |
)CONTINUE | Save active workspace to file DSK:CONTIN.APL, terminate APLSF, log-out from TWENEX. The saved workspace will be loaded automatically the next time you run APLSF. |
To interrupt APLSF during execution, press Ctrl-C once or twice.
Press Ctrl-C five (5) times to suspend APLSF and return to EXEC. Resume APLSF with command @REENTER or @CONTINUE.
APL Character Set With ASCII and Escape Mode Equivalents
[For convenience, part of the keyboard mapping table from APLSF Language Manual is duplicated below.]
| APL Character | Name | ASCII | Escape Mode | APL Character | Name | ASCII | |
|---|---|---|---|---|---|---|---|
| ∧ | and | & | ⍒ | Grade Down | .GD | ||
| ← | assignment | _ | ⍋ | Grade Up | .GU | ||
| ÷ | divide | % | ⌶ | I-Beam (histogram) | .IB | ||
| ⋆ | exponentiate | * | @E | ⍟ | LoGarithm | .LG | |
| × | multiply | # | ⍲ | NaNd | .NN | ||
| ? | question (roll and deal) | ? | @Q | ⍱ | NoR | .NR | |
| ' | quote string | ' | @K | ⍀ | back expansion | .CB | |
| ↑ | take | ^ | @Y | ⊖ | (Circle) Rotate | .CR | |
| ∣ | residue (ABsolute value) | .AB | @M | ⌿ | back scan | .CS | |
| α | ALpha | .AL | @A | ⌹ | Divide Quad | .DQ | |
| ⎕ | quad (BoX) | .BX | @L | Input Quad | .IQ | ||
| ⌈ | CEiling (maximum) | .CE | @S | Output Quad | .OQ | ||
| ↓ | drop (Down Arrow) | .DA | @U | OUt | .OU | ||
| ¨ | Dieresis | .DD | ⍫ | Protected Del | .PD | ||
| ⊥ | DEcode | .DE | @B | Quad Del | .QD | ||
| ∇ | DeL | .DL | @G | ⍞ | Quad Quote | ||
| ◊ | DiaMond | .DM | ⌽ | ReVersal | .RV | ||
| ∩ | Down Under | .DU | @C | ⍉ | TRanspose | .TR | |
| ⊤ | ENcode | .EN | @N | ⍎ | eXecute | .XQ | |
| ∈ | EPsilon | .EP | @E | ⍕ | ForMat | .FM | |
| ⌊ | FLoor | .FL | @D | ⍝ | Comment (lamp) | “ | |
| ≥ | Greater then or Equal to | .GE | A-Z | underscored alphabetics | .ZA-.ZZ | ||
| → | GO to (branch) | .GO | ⍙ | underscored lower del | .Z@ | ||
| ⍳ | IOta | .IO | @I | ||||
| { | Left curly Brace | .LB | |||||
| ∆ | delta (Lower Del) | .LD | @H | ||||
| ≤ | Less than or Equal to | .LE | |||||
| ⊢ | Left tacK | .LK | |||||
| ○ | circle (Large O) | .LO | @O | ||||
| ⊃ | Left Union | .LU | @X | ||||
| ≠ | Not Equal to | .NE | |||||
| − | NeGation | .NG | |||||
| ∼ | NoT | .NT | @T | ||||
| ⍵ | OMega | .OM | @W | ||||
| ∨ | OR | .OR | |||||
| } | Right curly Brace | .RB | |||||
| ⍴ | RhO | .RO | @R | ||||
| ⊣ | Right tacK | .RK | |||||
| ⊂ | Right Union | .RU | @Z | ||||
| ∘ | jot (Small O) | .SO | @J | ||||
| _ | UnderScore | .US | @F | ||||
| ∪ | Up Union | .UU | @V |
References
- APLSF Language Manual. Digital Equipment Corporation, 1979.
apl.1638506596.txt.gz · Last modified: 2021/12/03 04:43 by papa
