FigForth 1.0d#
An old Forth Version for ATARI 800. Uses traditional Forth blocks for storage.
Screens Disk 1#
SCR # 1
0 ( basic functions )
1 HEX : BELL FD EMIT ;
2 DECIMAL
3 : FREE ( amount of memory left)
4 MEMTOP @ PAD 256 + - ;
5 : U. 0 D. ; ( unsigned . )
6 : NEW-ABORT ( auto-reset )
7 HERE 2 - ' ABORT DUP @ , ! ;
8 IMMEDIATE
9 512 VARIABLE *$* ( $STK size)
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15 -->
SCR # 2
0 ( printer routines ) HEX
1 CREATE (P:) 50 C, 3A C, 9B C,
2 SMUDGE ' (P:) CONSTANT P:
3 : PR-ON 70 CLOSE 70 8 0 P: OPEN
4 1 PRFLAG ! ;
5 : PR-OFF 70 CLOSE 0 PRFLAG ! ;
6 : PLIST ( strt end --> )
7 1+ SWAP C EMIT ( form-feed) CR
8 DO CR I LIST CR CR CR
9 ?TERMINAL IF LEAVE ENDIF LOOP
10 C EMIT CR ;
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12
13
14
15 -->
SCR # 3
0 HEX : :SELECT ( code --> ? )
1 <BUILDS HERE 1 ALLOT 0
2 BEGIN BL WORD
3 HERE 1+ C@ 3B - WHILE
4 1+ HERE NUMBER DROP C,
5 -FIND IF DROP CFA , ELSE
6 HERE COUNT TYPE
7 ." UNDEFINED" QUIT ENDIF
8 REPEAT SWAP C! DOES>
9 DUP DUP C@ 3 * + 1+ SWAP 1+
10 DO I C@ DUP 0= IF DROP
11 I 1+ @ EXECUTE LEAVE ELSE
12 OVER = IF I 1+ @
13 EXECUTE LEAVE ENDIF
14 ENDIF 3 +LOOP ;
15 6 LOAD
SCR # 4
0 ( ERROR MESSAGES )
1 EMPTY STACK
2 DICTIONARY FULL
3 HAS INCORRECT ADDRESS MODE
4 ISN'T UNIQUE
5
6 DISK RANGE ?
7 FULL STACK
8 DISK ERROR !
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15 FORTH INTEREST GROUP
SCR # 5
0 ( ERROR MESSAGES )
1 COMPILATION ONLY, USE IN DEFN
2 EXECUTION ONLY
3 CONDITIONALS NOT PAIRED
4 DEFINITION NOT FINISHED
5 IN PROTECTED DICTIONARY
6 USE ONLY WHEN LOADING
7 OFF CURRENT EDITING SCREEN
8 DECLARE VOCABULARY
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SCR # 6
0 : DUMP ( from number --> )
1 BASE @ >R HEX ( save base)
2 0 DO CR DUP I + DUP 0 4 D.R
3 ." :" 8 0 DO ( 8 byte values)
4 DUP I + C@ 2 .R SPACE LOOP
5 1 2FE C! ( display controls)
6 8 0 DO ( print ASCII)
7 DUP I + C@ EMIT LOOP
8 ?TERMINAL IF LEAVE ENDIF
9 0 2FE C! DROP 8 +LOOP
10 DROP CR R> BASE ! ;
11 : <CMOVE ( from to n -->,hi-lo)
12 -DUP IF 1 - -1 SWAP DO
13 OVER I + C@ OVER I + C!
14 -1 +LOOP ENDIF DROP DROP ;
15 -->
SCR # 7
0 ( I/O definitions )
1 00 CONSTANT #0 30 CONSTANT #3
2 40 CONSTANT #4 50 CONSTANT #5
3 60 CONSTANT #6
4 2FB CONSTANT ATACHR
5 54 CONSTANT ROWCRS ( 1 byte)
6 55 CONSTANT COLCRS ( 2 bytes)
7
8
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14
15 0 VARIABLE (COLOR) -->
SCR # 8
0 : ?IOERR (STAT) @ 7F > IF
1 BASE @ HEX HERE COUNT TYPE
2 ." ? I/O ERROR " (STAT) @ .
3 BASE ! SP! IN @ BLK @ QUIT
4 ENDIF ;
5 CREATE (S:) 53 C, 3A C, 9B C,
6 SMUDGE ' (S:) CONSTANT S:
7 CREATE (E:) 45 C, 3A C, 9B C,
8 SMUDGE ' (E:) CONSTANT E:
9 : GR. ( mode --> )
10 ( mode+16=split,mode+32=no clr)
11 #6 CLOSE #0 CLOSE
12 #0 C 0 E: OPEN
13 #6 SWAP DUP 30 AND C OR ( aux1)
14 SWAP S: OPEN ?IOERR
15 ; -->
SCR # 9
0 : POS. ( x y --> )
1 ROWCRS C! COLCRS ! ;
2 : COLOR ( col --> )
3 (COLOR) C! ;
4 : DR. ( x y --> )
5 (COLOR) C@ ATACHR C!
6 POS. #6 11 JSRCIO ;
7 : LOC. ( x y --> val )
8 OVER OVER POS. #6 GET >R
9 POS. #6 R PUT R> ;
10 : PL. ( x y --> )
11 POS. #6 (COLOR) C@ PUT ;
12 : SE. ( reg hue lum --> )
13 SWAP 10 * + SWAP 2C4 + C! ;
14 : STICK ( port --> value)
15 278 ( STICK0) + C@ ; -->
SCR # 10
0 CREATE (CVTSTK) 4 C, 2 C, 3 C,
1 FF C, 6 C, 8 C, 7 C, FF C, 5 C,
2 1 C, 0 C, SMUDGE
3 : CVTSTK ( value --> 0=nothing,
4 1=up, 3=right, 5=down, 7=left)
5 5 - ' (CVTSTK) + C@ ;
6 : STRIG ( port --> TF,T=not psh)
7 284 ( STRIG0) + C@ ;
8 : SO. ( voice pitch dist vol ->)
9 3 D20F C! 3 232 C! 0 D208 C!
10 SWAP 10 * + 3 PICK DUP +
11 D201 ( AUDC1) + C!
12 SWAP DUP + D200 ( AUDF1) + C!
13 ;
14
15 -->
SCR # 11
0 : SPEMIT ( char -->,special ch)
1 1 2FE C! EMIT 0 2FE C! ;
2 : XIO ( cmd iocb aux1 aux2
3 nameaddr --> )
4 4 PICK >R ( iocb --> ret stk)
5 R 344 + ! ( store name addr)
6 R 34B + C! ( store aux2)
7 R> 34A + C! ( store aux1)
8 SWAP JSRCIO ( do cmd) ;
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15 DECIMAL -->
SCR # 12
0 ( string definitions) HEX
1 *$* @ ALLOT ( allocate $STK)
2 HERE CONSTANT $0 ( $STK base)
3 $0 VARIABLE $P ( $STK pointer)
4 : $P! ( --> , reset $STK)
5 $0 $P ! ;
6 : $P@ ( --> $P value)
7 $P @ ;
8 : $DROP ( $ -$> )
9 $P@ DUP C@ + 1+ $P ! ;
10 : $LEN ( --> len of top $ )
11 $P@ C@ ;
12 : $FETCH ( addr len --> , -$> $)
13 $P@ OVER 1+ - DUP $P ! ( upd$P)
14 OVER OVER C! ( store len)
15 1+ SWAP CMOVE ( move str) ; -->
SCR # 13
0 : $STORE ( addr max --> actual,
1 $ -$> )
2 $LEN MIN >R ( actual length)
3 $P@ 1+ SWAP R CMOVE
4 R> $DROP ;
5 : $VARLEN ( vaddr --> len )
6 1 - C@ ;
7 : $VARMAX ( vaddr --> max len )
8 2 - C@ ;
9 : $@ ( vaddr -->, -$> $ )
10 DUP $VARLEN $FETCH ;
11 : $! ( vaddr -->, $ -$> )
12 DUP DUP $VARMAX $STORE
13 SWAP 1 - C! ;
14 : $. ( $ -$> , print string)
15 $P@ 1+ $LEN TYPE $DROP ; -->
SCR # 14
0 : $DUP ( $ -$> $ $ )
1 $P@ 1+ $LEN $FETCH ;
2 : $P2@ ( 2nd$P) $P@ $LEN + 1+ ;
3 : $LEN2 ( 2ndlen) $P2@ C@ ;
4 : $OVER ( $1 $2 -$> $1 $2 $1 )
5 $P2@ 1+ $LEN2 $FETCH ;
6 : $SWAP ( $1 $2 -$> $2 $1 )
7 $P@ >R $LEN ( $2 length)
8 $OVER $LEN + 2+ ( $1$2$1, len)
9 $P@ SWAP R SWAP <CMOVE ( $2$1$1)
10 R> $P ! ; ( pop extra $1)
11 : $+ ( $1 $2 -$> $1+$2 )
12 $SWAP $LEN2 $LEN +
13 $P@ 1+ DUP 1+ $LEN <CMOVE
14 ( remove embedded length)
15 1 $P +! $P@ C! ; ( $P,len) -->
SCR # 15
0 : $FILL ( n b -->, -$> n b's )
1 OVER 1+ $P@ SWAP - DUP $P !
2 ( alloc space )
3 3 PICK OVER C! ( store length)
4 1+ ROT ROT FILL ;
5 : $VARFILL ( vaddr b --> )
6 OVER DUP $VARMAX SWAP $VARLEN -
7 -DUP IF ( any left to fill?)
8 >R OVER $@
9 R> SWAP $FILL $+ $!
10 ELSE DROP DROP ENDIF ;
11 : $VARIABLE ( len -->)
12 <BUILDS DUP C, 0 C, ALLOT
13 DOES> 2+ ;
14 : (") ( move inline str to $STK)
15 R 1+ $@ R C@ R> + 1+ >R ; -->
SCR # 16
0 : " ( if comp, put inline str on
1 $STK in exec, else put now)
2 STATE @ IF COMPILE (") 22 WORD
3 HERE C@ 1+ ALLOT
4 ELSE 22 WORD HERE 1+ $@
5 ENDIF ; IMMEDIATE
6 1 $VARIABLE $EOL ( EOL string)
7 $EOL 9B $VARFILL
8 : $FILE ( --> addr, $ -$> $+EOL)
9 $EOL $@ $+ $P@ 1+ ;
10 : $SETDR0 ( --> , $ -$> )
11 FLUSH CLOSE-DR0 $FILE DROP
12 DR0NAME 10 $STORE DROP ;
13 : $SETDR1 ( --> , $ -$> )
14 FLUSH CLOSE-DR1 $FILE DROP
15 DR1NAME 10 $STORE DROP ; -->
SCR # 17
0 0 VARIABLE $TR ( temp result)
1 : ($COMPARE) ( addr1 addr2 len
2 --> 1,0,-1 )
3 0 $TR ! -DUP IF ( len>0?)
4 0 DO OVER I + C@ OVER I + C@
5 - -DUP IF ( no match?)
6 0< IF -1 ELSE 1 ENDIF $TR !
7 LEAVE ENDIF LOOP ENDIF
8 DROP DROP $TR @ ;
9 : ($BLCOMPARE) ( addr len -->
10 1,0,-1 compare to blanks)
11 0 $TR ! -DUP IF ( len>0?)
12 0 DO DUP I + C@ BL - -DUP IF
13 0< IF -1 ELSE 1 ENDIF $TR !
14 LEAVE ENDIF LOOP ENDIF
15 DROP $TR @ ; -->
SCR # 18
0 : $COMPARE ( --> 1,0,-1
1 $1 $2 -$> , compare two str)
2 $P2@ 1+ $P@ 1+ $LEN $LEN2 MIN
3 ($COMPARE) DUP 0= ( match?)
4 IF ( ck rest of str)
5 $LEN $LEN2 < IF ( $1 longer?)
6 DROP $P2@ 1+ $LEN +
7 $LEN2 $LEN - ($BLCOMPARE)
8 ELSE DROP $P@ 1+ $LEN2 + $LEN
9 $LEN2 - ($BLCOMPARE) MINUS
10 ENDIF ENDIF $DROP $DROP ;
11 : $= ( --> tf, $1 $2 -$> )
12 $COMPARE 0= ;
13 : $< ( --> tf, $1 $2 -$> )
14 $COMPARE 0< ;
15 DECIMAL -->
SCR # 19
0 : "" ( push empty str on $STK)
1 -1 $P +! 0 $P@ C! ;
2 0 VARIABLE $TO ( offset)
3 0 VARIABLE $TL ( length)
4 : $EXTRACT ( varaddr off char
5 --> t offset -$> word
6 --> f [when no word left] )
7 $TR ! ( store char)
8 -1 $TO ! 0 $TL ! ( clr off,len)
9 OVER $VARLEN OVER OVER <
10 IF ( still room left in var)
11 SWAP DO ( find 1st non-separ)
12 DUP I + C@ $TR @ = 0=
13 IF ( non-separator char)
14 I $TO ! ( starting offset)
15 -->
SCR # 20
0 I 1+ OVER $VARLEN OVER OVER
1 < IF ( not at end of var)
2 SWAP DO ( find next separ)
3 DUP I + C@ $TR @ =
4 IF ( found end of word)
5 I $TO @ - $TL ! ( length)
6 LEAVE ENDIF
7 LOOP $TL @ 0=
8 IF ( assume end of line)
9 DUP $VARLEN $TO @ -
10 $TL ! ( length to end)
11 ENDIF
12 ELSE ( 1 char at end of var)
13 1 $TL ! DROP DROP
14 ENDIF LEAVE
15 -->
SCR # 21
0 ENDIF
1 LOOP
2 ELSE DROP DROP
3 ENDIF
4 $TO @ 0< IF ( word not found)
5 DROP 0 ( return FALSE)
6 ELSE ( word was found)
7 $TO @ + $TL @ $FETCH ( get wd)
8 $TO @ $TL @ + ( new offset)
9 1 ( return TRUE)
10 ENDIF ;
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15 -->
SCR # 22
0 : $+! ( var --> , $ -$>, add str
1 to variable ) ( comp. new len)
2 >R R $VARLEN R + ( start addr)
3 R $VARMAX R $VARLEN - ( ch lft)
4 $STORE ( concat, ret len added)
5 R $VARLEN + R> 1 - C!
6 ( store new length) ;
7 : $RESET ( auto-$STK reset)
8 NEW-ABORT $P! DECIMAL ;
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15 -->
SCR # 23
0 : $LOAD ( filename -$> )
1 $SETDR1 DR1 1 LOAD ;
2 : LOAD-ED
3 " D:EDITOR.4TH" $LOAD ;
4 : LOAD-BED ( boot editor)
5 " D:BOOTEDIT.4TH" $LOAD ;
6 : LOAD-DOS
7 " D:DOS.4TH" $LOAD ;
8 : LOAD-TURN
9 " D:TURNKEY.4TH" $LOAD ;
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15
SCR # 24
0
1
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15
OK
PR-OFF
