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VolksForth/sources/AtariST/FORTH83.fth

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Tools: fb2fth (Forth-Block to Forth Source) in gforth
2020-07-20 21:47:02 +00:00
\ *** Block No. 0 Hexblock 0
\\ *** Volksforth System - Sourcecode *** cas201301
This file contains the full sourcecode for the volksFORTH-83
kernal.
The source is compiled using the volksForth target compiler. The
source contains instructions for the target compiler that will
not end up in the final Forth system.
See the documentation on http://fossil.forth-ev.de/volksforth
for information on how to compile a new Forth kernel from
the source.
\ *** Block No. 1 Hexblock 1
\ Atari 520 ST Forth loadscreen cas201301
\ volksFORTH-83 was developed by K. Schleisiek, B. Pennemann
\ G. Rehfeld & D. Weineck
\ Atari ST - Version by D. Weineck
\ Atari ST/STE/TT/Falcon/FireBee Version by C. Strotmann
Onlyforth
0 dup displace !
Target definitions here!
$82 +load
1 $76 +thru
cr .unresolved ' .blk is .status
\ *** Block No. 2 Hexblock 2
Atari ST: Version 3.81.2 bugfix in STType
2020-07-21 22:51:54 +00:00
\ FORTH Preamble and ID cas202007
Tools: fb2fth (Forth-Block to Forth Source) in gforth
2020-07-20 21:47:02 +00:00
Assembler
0 FP D) jmp here 2- >label >cold
0 FP D) jmp here 2- >label >restart
here dup origin!
\ Initial cold-start values for user variables
Atari ST: Version 3.81.2 bugfix in STType
2020-07-21 22:51:54 +00:00
0 # D6 move D6 reg) jmp \ for multitasker
Tools: fb2fth (Forth-Block to Forth Source) in gforth
2020-07-20 21:47:02 +00:00
$100 allot
Atari ST: Version 3.81.2 bugfix in STType
2020-07-21 22:51:54 +00:00
| Create logo ," volksFORTH-83 rev. 3.85.2"
Tools: fb2fth (Forth-Block to Forth Source) in gforth
2020-07-20 21:47:02 +00:00
\ *** Block No. 3 Hexblock 3
\ Assembler Labels & Macros Next cas201301
Compiler Assembler also definitions
H : Next .w IP )+ D7 move \ D7 contains cfa
D7 reg) D6 move \ D6 contains cfa@
D6 reg) jmp .w \ jump to cfa@
there Tnext-link H @ T , H Tnext-link ! ;
Target
\ *** Block No. 4 Hexblock 4
\ recover noop 06sep86we
Create recover Assembler
.l A7 )+ D7 move FP IP suba .w IP RP -) move
.l D7 IP move 0 D7 moveq Next end-code
Compiler Assembler also definitions
H : ;c: 0 T recover R#) jsr end-code ] H ;
Target
Code noop Next end-code
\ *** Block No. 5 Hexblock 5
\ User Variables 14sep86we
Constant origin &10 uallot drop \ For multitasker
User s0
User r0
User dp
User offset 0 offset !
User base $10 base !
User output
User input
User errorhandler \ pointer for abort" -code
User voc-link
User udp \ points to next free addr in User
User next-link \ points to next Next
\ *** Block No. 6 Hexblock 6
\ end-trace 11sep86we
Variable UP
Label fnext IP )+ D7 move D7 reg) D6 move D6 reg) jmp
Code end-trace
fnext # D6 move .l D6 reg) A0 lea A0 D5 move
.w UP R#) D6 move .l user' next-link D6 FP DI) D6 .w move
BEGIN .l D6 reg) A1 lea .w D6 tst 0<>
WHILE .w &10 # A1 suba .l D5 A0 move
A0 )+ A1 )+ move A0 )+ A1 )+ move
.w 2 A1 addq A1 ) D6 move
REPEAT fnext bra end-code
\ *** Block No. 7 Hexblock 7
\ manipulate system pointers 09sep86we
Code sp@ ( -- addr ) .l SP D6 move FP D6 sub
.w D6 SP -) move Next end-code
Code sp! ( addr -- ) SP )+ D6 move $FFFE D6 andi
D6 reg) SP lea Next end-code
Code up@ ( -- addr ) UP R#) SP -) move Next end-code
Code up! ( addr -- ) SP )+ D0 move $FFFE D0 andi
D6 UP R#) move Next end-code
Code forthstart ( -- laddr ) .l FP SP -) move Next end-code
\ *** Block No. 8 Hexblock 8
\ manipulate returnstack 05sep86we
Code rp@ ( -- addr ) .l RP D6 move FP D6 sub
.w D6 SP -) move Next end-code
Code rp! ( addr -- ) SP )+ D6 move $FFFE D6 andi
D6 reg) RP lea Next end-code
Code >r ( 16b -- ) SP )+ RP -) move
Next end-code restrict
Code r> ( -- 16b ) RP )+ SP -) move
Next end-code restrict
\ *** Block No. 9 Hexblock 9
\ r@ rdrop exit unnest ?exit 04sep86we
Code r@ ( -- 16b ) RP ) SP -) move Next end-code
Code rdrop 2 RP addq Next end-code restrict
Code exit RP )+ D7 move .l D7 IP move
FP IP adda Next end-code
Code unnest RP )+ D7 move .l D7 IP move
FP IP adda Next end-code
Code ?exit ( flag -- ) SP )+ tst 0<> IF RP )+ D7 move
.l D7 IP move FP IP adda THEN
Next end-code
\\ : ?exit ( flag -- ) IF rdrop THEN ;
\ *** Block No. 10 Hexblock A
\ execute perform 04sep86we
Code execute ( cfa -- )
SP )+ D7 move D7 reg) D6 move .l D6 reg) jmp end-code
: perform ( addr -- ) @ execute ;
\ *** Block No. 11 Hexblock B
\ c@ c! ctoggle 04sep86we
Code c@ ( addr -- 8b )
SP )+ D6 move D6 reg) A0 lea 0 D0 moveq
.b A0 ) D0 move .w D0 SP -) move Next end-code
Code c! ( 16b addr -- )
SP )+ D6 move D6 reg) A0 lea
SP )+ D0 move .b D0 A0 ) move Next end-code
: ctoggle ( 8b addr --) under c@ xor swap c! ;
\ *** Block No. 12 Hexblock C
\ @ ! 2@ 2! 04sep86we
Code @ ( addr -- 16b )
SP )+ D6 move D6 reg) A0 lea
.b 1 A0 D) SP -) move A0 ) SP -) move
Next end-code
Code ! ( 16b addr -- )
SP )+ D6 move D6 reg) A0 lea
.b SP )+ A0 )+ move SP )+ A0 )+ move
Next end-code
\ *** Block No. 13 Hexblock D
\ 2@ 2! 04sep86we
Code 2@ ( addr -- 32b )
SP )+ D6 move D6 reg) A0 lea
.b 3 A0 D) SP -) move 2 A0 D) SP -) move
1 A0 D) SP -) move A0 ) SP -) move Next end-code
Code 2! ( 32b addr -- )
SP )+ D6 move D6 reg) A0 lea
.b SP )+ A0 )+ move SP )+ A0 )+ move
SP )+ A0 )+ move SP )+ A0 )+ move Next end-code
\\
: 2@ ( adr -- 32b) dup 2+ @ swap @ ;
: 2! ( 32b adr --) rot over 2+ ! ! ;
\ *** Block No. 14 Hexblock E
\ lc@ lc! l@ l! 24may86we
Code lc@ ( laddr -- 8b )
.l SP )+ A0 move 0 D0 moveq .b A0 ) D0 move
.w D0 SP -) move Next end-code
Code lc! ( 8b laddr -- )
.l SP )+ A0 move .w SP )+ D0 move .b D0 A0 ) move
Next end-code
Code l@ ( laddr -- n )
.l SP )+ A0 move .b A0 )+ D0 move .w 8 # D0 lsl
.b A0 ) D0 move .w D0 SP -) move Next end-code
Code l! ( n laddr -- )
.l SP )+ A0 move .w SP )+ D0 move .b D0 1 A0 D) move
.w 8 # D0 lsr .b D0 A0 ) move Next end-code
\ *** Block No. 15 Hexblock F
\ lcmove 10sep86we
Code lcmove ( fromladdr toladdr count -- )
SP )+ D0 move .l SP )+ A0 move SP )+ A1 move
.w D0 tst 0<> IF 1 D0 subq
D0 DO .b A1 )+ A0 )+ move LOOP THEN Next end-code
\ *** Block No. 16 Hexblock 10
\ l2@ l2! cas201301
Code l2@ ( laddr -- 32bit )
.l SP )+ A0 move .b A0 )+ D0 move .l 8 # D0 lsl
.b A0 )+ D0 move .l 8 # D0 lsl .b A0 )+ D0 move .l 8 # D0 lsl
.b A0 ) D0 move .l D0 SP -) move Next end-code
Code l2! ( 32bit laddr -- )
.l SP )+ A0 move SP )+ D0 move
.l 8 # D0 rol .b D0 A0 )+ move .l 8 # D0 rol .b D0 A0 )+ move
.l 8 # D0 rol .b D0 A0 )+ move .l 8 # D0 rol .b D0 A0 )+ move
Next end-code
Code ln+! ( n laddr -- ) \ only even addresses allowed
.l SP )+ A0 move A0 ) A1 move .w SP )+ A1 adda
.l A1 A0 ) move Next end-code
\ *** Block No. 17 Hexblock 11
\ +! drop swap 05sep86we
Code +! ( n addr -- )
SP )+ D6 move D6 reg) A0 lea 2 A0 addq 2 SP addq
4 # move>ccr .b SP -) A0 -) addx SP -) A0 -) addx
.w 2 SP addq Next end-code
Code drop ( 16b -- ) 2 SP addq Next end-code
Code swap ( 16b1 16b2 -- 16b2 16b1 )
.l SP ) D0 move D0 swap D0 SP ) move Next end-code
\ *** Block No. 18 Hexblock 12
\ dup ?dup 20mar86we
Code dup ( 16b -- 16b 16b ) SP ) SP -) move Next end-code
Code ?dup ( 16b -- 16b 16b / false )
SP ) tst 0<> IF SP ) SP -) move THEN Next end-code
\\
: ?dup ( 16b -- 16b 16b / false) dup IF dup THEN ;
\ *** Block No. 19 Hexblock 13
\ over rot nip under bp 11 oct 86
Code over ( 16b1 16b2 - 16b1 16b3 16b1 )
2 SP D) SP -) move Next end-code
Code rot ( 16b1 16b2 16b3 - 16b2 16b3 16b1 )
SP )+ D1 move SP )+ D2 move SP ) D0 move
D2 SP ) move D1 SP -) move D0 SP -) move
Next end-code
Code nip ( 16b1 16b2 -- 16b2 )
SP )+ SP ) move Next end-code
Code under ( 16b1 16b2 - 16b2 16b1 16b2 )
.l SP ) D0 move D0 swap D0 SP ) move .w D0 SP -) move
Next end-code
\\
: nip ( 16b1 16b2 -- 16b2) swap drop ;
: under ( 16b1 16b2 -- 16b2 16b1 16b2) swap over ;
\ *** Block No. 20 Hexblock 14
\ -rot nip pick roll bp 11 oct 86
Code -rot ( 16b1 16b2 16b3 -- 16b3 16b1 16b2 )
SP )+ D2 move SP )+ D0 move SP ) D1 move
D2 SP ) move D1 SP -) move D0 SP -) move
Next end-code
Code pick ( n -- 16b.n )
.l D0 clr .w SP )+ D0 move D0 D0 add
0 D0 SP DI) SP -) move Next end-code
: roll ( n -- )
dup >r pick sp@ dup 2+ r> 1+ 2* cmove> drop ;
: -roll ( n -- ) >r dup sp@ dup 2+
dup 2+ swap r@ 2* cmove r> 1+ 2* + ! ;
\\
: pick ( n -- 16b.n ) 1+ 2* sp@ + @ ;
: -rot ( 16b1 16b2 16b3 -- 16b3 16b1 16b2 ) rot rot ;
\ *** Block No. 21 Hexblock 15
\ double word stack manip. bp 12oct86
Code 2swap ( 32b1 32b2 -- 32b2 32b1 )
.l SP )+ D0 move SP ) D1 move D0 SP ) move
D1 SP -) move Next end-code
Code 2dup ( 32b -- 32b 32b )
.l SP ) SP -) move Next end-code
Code 2over ( 32b1 32b2 -- 32b1 32b2 32b1 )
.l 4 SP D) SP -) move Next end-code
Code 2drop ( 32b -- ) 4 SP addq Next end-code
\\ : 2swap ( 32b1 32b2 -- 32b2 32b1) rot >r rot r> ;
: 2drop ( 32b -- ) drop drop ;
: 2dup ( 32b -- 32b 32b) over over ;
\ *** Block No. 22 Hexblock 16
\ + and or xor not 19mar86we
Code + ( n1 n2 -- n3 )
SP )+ D0 move D0 SP ) add Next end-code
Code or ( 16b1 16b2 -- 16b3 )
SP )+ D0 move D0 SP ) or Next end-code
Code and ( 16b1 16b2 -- 16b3 )
SP )+ D0 move D0 SP ) and Next end-code
Code xor ( 16b1 16b2 -- 16b3 )
SP )+ D0 move D0 SP ) eor Next end-code
Code not ( 16b1 -- 16b2 ) SP ) not Next end-code
\ *** Block No. 23 Hexblock 17
\ - negate 19mar86we
Code - ( n1 n2 -- n3 )
SP )+ D0 move D0 SP ) sub Next end-code
Code negate ( n1 -- n2 ) SP ) neg Next end-code
\ *** Block No. 24 Hexblock 18
\ double arithmetic cas201301
Code dnegate ( d1 -- -d1 ) .l SP ) neg Next end-code
Code d+ ( d1 d2 -- d3 )
.l SP )+ D0 move D0 SP ) add Next end-code
Code d- ( d1 d2 -- d1-d2 )
.l SP )+ D0 move D0 SP ) sub Next end-code
Code d* ( d1 d2 -- d1*d2 )
.l SP )+ D0 move SP )+ D1 move
D0 D2 move D0 D3 move D3 swap D1 D4 move D4 swap
D1 D0 mulu D3 D1 mulu D4 D2 mulu
D0 swap .w D1 D0 add .w D2 D0 add .l D0 swap
D0 SP -) move Next end-code
\ *** Block No. 25 Hexblock 19
\ 1+ 2+ 3+ 4+ 6+ 1- 2- 4- 18nov86we
Code 1+ ( n1 -- n2 ) 1 SP ) addq Next end-code
Code 2+ ( n1 -- n2 ) 2 SP ) addq Next end-code
Code 3+ ( n1 -- n2 ) 3 SP ) addq Next end-code
Code 4+ ( n1 -- n2 ) 4 SP ) addq Next end-code
| Code 6+ ( n1 -- n2 ) 6 SP ) addq Next end-code
Code 1- ( n1 -- n2 ) 1 SP ) subq Next end-code
Code 2- ( n1 -- n2 ) 2 SP ) subq Next end-code
Code 4- ( n1 -- n2 ) 4 SP ) subq Next end-code
: on ( addr -- ) true swap ! ;
: off ( addr -- ) false swap ! ;
\ *** Block No. 26 Hexblock 1A
\ number Constants bp 18nov86we
Code true ( -- -1 ) -1 # SP -) move Next end-code
Code false ( -- 0 ) 0 # SP -) move Next end-code
Code 1 ( -- 1 ) 1 # SP -) move Next end-code
Code 2 ( -- 2 ) 2 # SP -) move Next end-code
Code 3 ( -- 3 ) 3 # SP -) move Next end-code
Code 4 ( -- 4 ) 4 # SP -) move Next end-code
' true Alias -1 ' false Alias 0
\ *** Block No. 27 Hexblock 1B
\ words for number literals 19mar86we
Code lit ( -- 16b ) IP )+ SP -) move Next end-code
: Literal ( 16b -- ) compile lit , ; immediate restrict
\ *** Block No. 28 Hexblock 1C
\ comparision code words 19mar86we
Label yes true # SP ) move Next Label no SP ) clr Next
Code 0< ( n -- flag ) SP ) tst yes bmi no bra end-code
Code 0= ( 16b -- flag ) SP ) tst yes beq no bra end-code
Code < ( n1 n2 -- flag ) SP )+ D0 move SP ) D0 cmp
yes bgt no bra end-code
Code u< ( u1 u2 -- flag ) SP )+ D0 move SP ) D0 cmp
yes bhi no bra end-code
: uwithin ( u1 [low up[ -- flag )
rot under u> -rot u> not and ;
\ *** Block No. 29 Hexblock 1D
\ comparision code words 25mar86we
Code > ( n1 n2 -- flag ) SP )+ D0 move SP ) D0 cmp
yes blt no bra end-code
Code 0> ( n -- flag ) SP ) tst yes bgt no bra
end-code
Code 0<> ( n -- flag ) SP ) tst yes bne no bra
end-code
Code u> ( u1 u2 -- flag ) SP )+ D0 move SP ) D1 move
D0 D1 cmp yes bhi no bra
end-code
Code = ( n1 n2 -- flag ) SP )+ D0 move SP ) D0 cmp
yes beq no bra end-code
\ *** Block No. 30 Hexblock 1E
\ comparision words 20mar86we
: d0= ( d -- flag ) or 0= ;
: d= ( d1 d2 -- flag ) dnegate d+ d0= ;
: d< ( d1 d2 -- flag ) rot 2dup - IF > nip nip
ELSE 2drop u< THEN ;
\\
: 0< 8000 and 0<> ;
: > ( n1 n2 -- flag ) swap < ;
: 0> ( n -- flag ) negate 0< ;
: 0<> ( n -- flag ) 0= not ;
: u> ( u1 u2 -- flag ) swap u< ;
: = ( n1 n2 -- flag ) - 0= ;
\ *** Block No. 31 Hexblock 1F
\ min max umax umin extend dabs abs 18nov86we
| Code minimax ( n1 n2 f -- n )
SP )+ tst 0<> IF SP ) 2 SP D) move THEN 2 SP addq
Next end-code
: min ( n1 n2 -- n3 ) 2dup > minimax ;
: max ( n1 n2 -- n3 ) 2dup < minimax ;
: umax ( u1 u2 -- u3 ) 2dup u< minimax ;
: umin ( u1 u2 -- u3 ) 2dup u> minimax ;
: extend ( n -- d ) dup 0< ;
: dabs ( d -- ud ) extend IF dnegate THEN ;
: abs ( n -- u) extend IF negate THEN ;
\\
: minimax ( n1 n2 flag -- n3 )
rdrop IF swap THEN drop ;
\ *** Block No. 32 Hexblock 20
\ loop primitives 19mar86we
| : dodo rdrop r> 2+ dup >r rot >r swap >r >r ;
: (do ( limit start -- ) over - dodo ; restrict
: (?do ( limit start -- ) over - ?dup IF dodo THEN
r> dup @ + >r drop ; restrict
: bounds ( start count -- limit start ) over + swap ;
Code endloop 6 RP addq Next end-code restrict
\\ dodo puts "index | limit | adr.of.DO" on return-stack
\ *** Block No. 33 Hexblock 21
\ (loop (+loop 04sep86we
Code (loop
1 RP ) addq
CC IF 4 RP D) D6 move D6 reg) IP lea THEN
Next end-code restrict
Code (+loop
SP )+ D0 move D0 D1 move D0 RP ) add
1 # D1 roxr D0 D1 eor
0>= IF 4 RP D) D6 move D6 reg) IP lea THEN
Next end-code restrict
\ *** Block No. 34 Hexblock 22
\ loop indices 20mar86we
Code I ( -- n )
RP ) D0 move 2 RP D) D0 add D0 SP -) move
Next end-code
Code J ( -- n )
6 RP D) D0 move 8 RP D) D0 add D0 SP -) move
Next end-code
\ *** Block No. 35 Hexblock 23
\ branch ?branch 06sep86we
Code branch
Label bran1 IP ) IP adda Next end-code
Code ?branch ( fl -- ) SP )+ tst bran1 beq 2 IP addq
Next end-code
\ *** Block No. 36 Hexblock 24
\ resolve loops and branches 19mar86we
: >mark ( -- addr ) here 0 , ;
: >resolve ( addr -- ) here over - swap ! ;
: <mark ( -- addr ) here ;
: <resolve ( addr -- ) here - , ;
: ?pairs ( n1 n2 -- ) - abort" unstructured" ;
\ *** Block No. 37 Hexblock 25
\ case? 19mar86we
Code case? ( 16b1 16b2 -- 16b1 false / true )
SP )+ D0 move SP ) D0 cmp yes beq SP -) clr
Next end-code
\\
: case? ( 16b1 16b2 -- 16b1 false / true )
over = dup IF nip THEN ;
\ *** Block No. 38 Hexblock 26
\ Branching 24nov85we
: IF compile ?branch >mark 1 ; immediate restrict
: THEN abs 1 ?pairs >resolve ; immediate restrict
: ELSE 1 ?pairs compile branch >mark swap
>resolve -1 ; immediate restrict
: BEGIN <mark 2 ; immediate restrict
: WHILE 2 ?pairs 2 compile ?branch >mark
-2 2swap ; immediate restrict
| : (reptil <resolve
BEGIN dup -2 = WHILE drop >resolve REPEAT ;
: REPEAT 2 ?pairs compile branch (reptil ;
immediate restrict
: UNTIL 2 ?pairs compile ?branch (reptil ;
immediate restrict
\ *** Block No. 39 Hexblock 27
\ Loops 24nov85we
: DO compile (do >mark 3 ; immediate restrict
: ?DO compile (?do >mark 3 ; immediate restrict
: LOOP 3 ?pairs compile (loop compile endloop >resolve ;
immediate restrict
: +LOOP 3 ?pairs compile (+loop compile endloop >resolve ;
immediate restrict
: LEAVE endloop r> 2- dup @ + >r ; restrict
\\ Returnstack: calladr | index limit | adr of DO
\ *** Block No. 40 Hexblock 28
\ Multiplication 18nov86we
Code um* ( u1 u2 -- ud )
SP )+ D0 move SP )+ D0 mulu .l D0 SP -) move
Next end-code
Code * ( n1 n2 -- n )
SP )+ D0 move SP )+ D0 mulu D0 SP -) move
Next end-code
: m* ( n1 n2 -- d ) dup 0< dup >r IF negate THEN
swap dup 0< IF negate r> not >r THEN
um* r> IF dnegate THEN ;
Code 2* ( n -- 2*n ) SP ) asl Next end-code
Code 2/ ( n -- n/2 ) SP ) asr Next end-code
\ *** Block No. 41 Hexblock 29
\ Division cas201301
label divovl ;c: true abort" division overflow" ;
Label (m/mod \ d(D2) n(D0) -- mod quot
.l A7 )+ A0 move \ get addr from stack
.w D0 D1 move D0 D3 move
.l D1 ext
D2 D1 eor 0< IF D2 neg .w D0 neg THEN
D0 D2 divs divovl bvs
.w D2 D0 move D2 swap .l D1 tst
0< IF .w D2 tst 0<> IF 1 D0 subq \ quot = quot - 1
D3 D2 sub D2 neg \ rem = n - rem
THEN THEN
.w D2 SP -) move D0 SP -) move
.l A0 ) jmp \ adr. from /0-TRAPS leads to a GEM crash
\ *** Block No. 42 Hexblock 2A
\ um/mod m/mod /mod 18nov86we
Code um/mod ( d1 n1 -- rem quot )
SP )+ D0 move .l SP )+ D1 move D0 D1 divu
divovl bvs
D1 swap D1 SP -) move Next end-code
Code m/mod ( d n -- mod quot )
SP )+ D0 move .l SP )+ D2 move (m/mod bsr Next end-code
Code /mod ( n1 n2 -- mod quot )
SP )+ D0 move SP )+ D2 move .l D2 ext
(m/mod bsr Next end-code
\ *** Block No. 43 Hexblock 2B
\ / mod 18nov86we
Code / ( n1 n2 -- quot )
SP )+ D0 move SP )+ D2 move .l D2 ext
.w D0 D1 move D2 D1 eor \ SHORT way !
0< IF (m/mod bsr SP )+ SP ) move Next THEN
D0 D2 divs divovl bvs D2 SP -) move Next end-code
Code mod ( n1 n2 -- mod )
SP )+ D0 move SP )+ D2 move .l D2 ext
.w D0 D1 move D2 D1 eor \ SHORT way !
0< IF (m/mod bsr 2 SP addq Next THEN
D0 D2 divs divovl bvs
D2 swap D2 SP -) move Next end-code
\ *** Block No. 44 Hexblock 2C
\ */mod */ u/mod ud/mod 18nov86we
: */mod ( n1 n2 n3 -- rem quot ) >r m* r> m/mod ;
: */ ( n1 n2 n3 -- quot ) */mod nip ;
: u/mod ( u1 u2 -- urem uquot ) 0 swap um/mod ;
: ud/mod ( ud1 u2 -- urem udquot ) >r 0 r@ um/mod r> swap >r
um/mod r> ;
\\
: /mod ( n1 n2 -- rem quot ) >r extend r> m/mod ;
: / ( n1 n2 -- quot ) /mod nip ;
: mod ( n1 n2 -- rem ) /mod drop ;
: m/mod ( d n -- mod quot )
dup >r abs over 0< IF under + swap THEN um/mod r@ 0<
IF negate over IF swap r@ + swap 1- THEN THEN
rdrop ;
\ *** Block No. 45 Hexblock 2D
\ cmove cmove> 04sep86we
Code cmove ( from to count -- )
SP )+ D0 move SP )+ D6 move D6 reg) A0 lea
SP )+ D6 move D6 reg) A1 lea
D0 tst 0<> IF 1 D0 subq
D0 DO .b A1 )+ A0 )+ move LOOP THEN
Next end-code
Code cmove> ( from to count -- )
SP )+ D0 move
SP )+ D6 move D0 D6 add D6 reg) A0 lea
SP )+ D6 move D0 D6 add D6 reg) A1 lea
D0 tst 0<> IF 1 D0 subq
D0 DO .b A1 -) A0 -) move LOOP THEN
Next end-code
\ *** Block No. 46 Hexblock 2E
\ move place count bp 11 oct 86
: move ( from to quan -- )
>r 2dup u< IF r> cmove> exit THEN r> cmove ;
: place ( addr len to --)
over >r rot over 1+ r> move c! ;
Code count ( adr -- adr+1 len )
SP ) D6 move D6 reg) A0 lea
D0 clr .b A0 )+ D0 move .w 1 SP ) addq D0 SP -) move
Next end-code
\\
: count ( adr -- adr+1 len ) dup 1+ swap c@ ;
\ *** Block No. 47 Hexblock 2F
\ fill erase bp 11 oct 86
Code fill ( addr quan 8b -- )
SP )+ D0 move SP )+ D1 move
SP )+ D6 move D6 reg) A0 lea
D1 tst 0<> IF
1 D1 subq D1 DO .b D0 A0 )+ move LOOP THEN
Next end-code
: erase ( addr quan --) 0 fill ;
\\
: fill ( addr quan 8b -- )
swap ?dup IF >r over c! dup 1+ r> 1- cmove exit THEN
2drop ;
\ *** Block No. 48 Hexblock 30
\ , c, 08sep86we
Code , ( 8b -- ) UP R#) D6 move
.l user' dp D6 FP DI) D6 .w move D6 reg) A0 lea
.b SP )+ A0 )+ move SP )+ A0 )+ move
.w UP R#) D6 move .l 2 user' dp D6 FP DI) .w addq
Next end-code
Code c, ( 8b -- ) UP R#) D6 move
.l user' dp D6 FP DI) D6 .w move D6 reg) A0 lea
SP )+ D0 move .b D0 A0 )+ move
.w UP R#) D6 move .l 1 user' dp D6 FP DI) .w addq
Next end-code
\\
: , ( 16b -- ) here ! 2 allot ;
: c, ( 8b -- ) here c! 1 allot ;
\ *** Block No. 49 Hexblock 31
\ allot pad compile 08sep86we
Code here ( -- addr )
UP R#) D6 move .l user' dp D6 FP DI) SP -) .w move
Next end-code
Code allot ( n -- ) UP R#) D6 move SP )+ D0 move
D0 .l user' dp D6 FP DI) .w add Next end-code
: pad ( -- addr ) here $42 + ;
: compile r> dup 2+ >r @ , ; restrict
\\
: here ( -- addr ) dp @ ;
: allot ( n -- )
dup here + up@ u> abort" Dictionary full" dp +! ;
\ *** Block No. 50 Hexblock 32
\ input strings 25mar86we
Variable #tib 0 #tib !
Variable >tib here >tib ! &80 allot
Variable >in 0 >in !
Variable blk 0 blk !
Variable span 0 span !
: tib ( -- addr ) >tib @ ;
: query tib &80 expect span @ #tib !
>in off blk off ;
\ *** Block No. 51 Hexblock 33
\ scan skip /string 16nov85we
: /string ( addr0 len0 +n - addr1 len1 )
over umin rot over + -rot - ;
\\
: scan ( addr0 len0 char -- addr1 len1 ) >r
BEGIN dup WHILE over c@ r@ - WHILE 1- swap 1+ swap
REPEAT rdrop ;
: skip ( addr len del -- addr1 len1 ) >r
BEGIN dup WHILE over c@ r@ = WHILE 1- swap 1+ swap
REPEAT rdrop ;
\ *** Block No. 52 Hexblock 34
\ skip scan 04sep86we
Label done .l FP A0 suba .w A0 SP -) move D1 SP -) move Next
Code skip ( addr len del -- addr1 len1 )
SP )+ D0 move SP )+ D1 move 1 D1 addq
SP )+ D6 move D6 reg) A0 lea
BEGIN 1 D1 subq 0<>
WHILE .b A0 ) D2 move D2 D0 cmp done bne .w 1 A0 addq
REPEAT done bra end-code
Code scan ( addr len chr -- addr1 len1 )
SP )+ D0 move SP )+ D1 move 1 D1 addq
SP )+ D6 move D6 reg) A0 lea
BEGIN 1 D1 subq 0<>
WHILE .b A0 ) D2 move D2 D0 cmp done beq .w 1 A0 addq
REPEAT done bra end-code
\ *** Block No. 53 Hexblock 35
\ convert to upper case 04sep86we
Label umlaut
Ascii <EFBFBD> c, Ascii <EFBFBD> c, Ascii <EFBFBD> c,
Ascii <EFBFBD> c, Ascii <EFBFBD> c, Ascii <EFBFBD> c,
Label (capital ( D1 -> D1 )
D1 7 # btst 0= IF
.b Ascii a D1 cmpi >= IF Ascii z D1 cmpi
<= IF bl D1 subi THEN THEN rts
THEN umlaut R#) A1 lea
2 D2 moveq D2 DO .b A1 ) D1 cmp
0= IF .w 3 A1 addq .b A1 ) D1 move rts THEN
.w 1 A1 addq LOOP rts end-code
\ *** Block No. 54 Hexblock 36
\ capital capitalize bp 11 oct 86
Code capital ( char -- char' )
SP ) D1 move (capital bsr D1 SP ) move Next end-code
Code capitalize ( string -- string )
SP ) D6 move D6 reg) A0 lea
D0 clr .b A0 )+ D0 move
0<> IF 1 D0 subq D0 DO
A0 ) D1 move (capital bsr D1 A0 )+ move
LOOP THEN Next end-code
\\
: capitalize ( string -- string)
dup count bounds ?DO I c@ capital I c! LOOP ;
\ *** Block No. 55 Hexblock 37
\ (word bp 11 oct 86
Code (word ( char adr0 len0 -- addr )
D1 clr SP )+ D0 move D0 D4 move
SP )+ D6 move D6 reg) A0 lea SP ) D2 move
>in R#) D3 move D3 A0 adda D3 D0 sub
<= IF D4 >in R#) move
ELSE 1 D0 addq BEGIN 1 D0 subq 0<>
WHILE .b A0 ) D2 cmp 0=
WHILE .l 1 A0 addq REPEAT THEN
A0 A1 move .w 1 D0 addq
BEGIN .w 1 D0 subq 0<>
WHILE .b A0 ) D2 cmp 0<>
WHILE .w 1 A0 addq 1 D1 addq REPEAT THEN
.w D1 tst 0<> IF 1 A0 addq THEN
.l FP A0 suba D6 A0 suba .w A0 >in R#) move THEN
\ *** Block No. 56 Hexblock 38
\ (word Part2 bp 11 oct 86
UP R#) D6 move .l user' dp D6 FP DI) D6 .w move
D6 reg) A0 lea D6 SP ) move
.b D1 A0 )+ move .w 1 D1 subq
0>= IF D1 DO .b A1 )+ A0 )+ move LOOP THEN
bl # A0 ) move Next end-code
\\
: word ( char -- addr)
>r source over swap >in @ /string
r@ skip over swap r> scan >r
rot over swap - r> 0<> -
>in ! over - here dup >r place
bl r@ count + c! r> ;
\ *** Block No. 57 Hexblock 39
\ even source word parse name bp 11oct86
: even ( addr -- addr1 ) dup 1 and + ;
Variable loadfile 0 loadfile !
: source ( -- addr len ) blk @ ?dup
IF loadfile @ (block b/blk exit THEN tib #tib @ ;
: word ( char -- addr ) source (word ;
: parse ( char -- addr len )
>r source >in @ /string over swap r> scan >r
over - dup r> 0<> - >in +! ;
: name ( -- addr ) bl word capitalize exit ;
\ *** Block No. 58 Hexblock 3A
\ state Ascii ," (" " 15jun86we
Variable state 0 state !
: Ascii ( char -- n )
bl word 1+ c@ state @ IF [compile] Literal THEN ;
immediate
: ," Ascii " parse here over 1+ allot place ;
: "lit r> r> under count + even >r >r ; restrict
: (" "lit ; restrict
: " compile (" ," align ; immediate restrict
\ *** Block No. 59 Hexblock 3B
\ ." ( .( \ \\ hex decimal 25mar86we
: (." "lit count type ; restrict
: ." compile (." ," align ; immediate restrict
: ( ascii ) parse 2drop ; immediate
: .( ascii ) parse type ; immediate
: \ >in @ c/l / 1+ c/l * >in ! ; immediate
: \\ b/blk >in ! ; immediate
: \needs name find nip IF [compile] \ THEN ;
: hex $10 base ! ;
: decimal &10 base ! ;
\ *** Block No. 60 Hexblock 3C
\ number conversion: digit? cas201301
| Variable ptr \ points into string
Label fail SP ) clr Next
Code digit? ( char -- n true : false )
UP R#) D6 move .l user' base D6 FP DI) D0 .w move
SP ) D1 move .b Ascii 0 D1 subi fail bmi &10 D1 cmpi
0>= IF $11 D1 cmpi fail bmi 7 D1 subq THEN
D0 D1 cmp fail bpl .w D1 SP ) move true # SP -) move
Next end-code
\\
: digit? ( char -- digit true/ false )
Ascii 0 - dup 9 u> IF [ Ascii A Ascii 9 - 1- ] Literal -
dup 9 u> IF [ 2swap ( unstructured ) ] THEN
base @ over u> ?dup ?exit THEN drop false ;
\ *** Block No. 61 Hexblock 3D
\ number conversion: accumulate convert 11sep86we
Code accumulate ( +d0 addr digit -- +d1 addr )
0 D0 moveq SP )+ D0 move
2 SP D) D1 move 4 SP D) D2 move
UP R#) D6 move .l user' base D6 FP DI) D3 .w move
D3 D2 mulu D3 D1 mulu .l D1 swap .w D1 clr
.l D2 D1 add D0 D1 add D1 2 SP D) move Next end-code
: convert ( +d1 addr0 -- +d2 addr2 )
1+ BEGIN count digit? WHILE accumulate REPEAT 1- ;
\\
: accumulate ( +d0 adr digit - +d1 adr )
swap >r swap base @ um* drop rot base @ um* d+ r> ;
\ *** Block No. 62 Hexblock 3E
\ number conversion: end? char previous 25mar86we
| : end? ( -- flag ) ptr @ 0= ;
| : char ( addr0 -- addr1 char ) count -1 ptr +! ;
| : previous ( addr0 -- addr0 char ) 1- count ;
\ *** Block No. 63 Hexblock 3F
\ number conversion: ?nonum punctuation? 25mar86we
| : ?nonum ( flag -- exit if true )
IF rdrop 2drop drop rdrop false THEN ;
| : punctuation? ( char -- flag )
Ascii , over = swap Ascii . = or ;
\ *** Block No. 64 Hexblock 40
\ number conversion: fixbase? 25mar86we
| : fixbase? ( char - char false / newbase true )
Ascii & case? IF &10 true exit THEN
Ascii $ case? IF $10 true exit THEN
Ascii H case? IF $10 true exit THEN
Ascii % case? IF 2 true exit THEN false ;
\ *** Block No. 65 Hexblock 41
\ number conversion: ?num ?dpl 25mar86we
Variable dpl -1 dpl !
| : ?num ( flag -- exit if true )
IF rdrop drop r> IF dnegate THEN
rot drop dpl @ 1+ ?dup ?exit drop true THEN ;
| : ?dpl dpl @ -1 = ?exit 1 dpl +! ;
\ *** Block No. 66 Hexblock 42
\ (number number 11sep86we
: number? ( string - string false / n 0< / d 0> )
base push dup count ptr ! dpl on
0 >r ( +sign) 0 0 rot end? ?nonum char
Ascii - case? IF rdrop true >r end? ?nonum char THEN
fixbase? IF base ! end? ?nonum char THEN
BEGIN digit? 0= ?nonum
BEGIN accumulate ?dpl end? ?num char digit? 0= UNTIL
previous punctuation? 0= ?nonum dpl off end? ?num char
REPEAT ;
: number ( string -- d )
number? ?dup 0= abort" ?" 0< IF extend THEN ;
\ *** Block No. 67 Hexblock 43
\ hide reveal immediate restrict 24nov85we
Variable last 0 last !
| : last? ( -- false / acf true) last @ ?dup ;
: hide last? IF 2- @ current @ ! THEN ;
: reveal last? IF 2- current @ ! THEN ;
: Recursive reveal ; immediate restrict
| : flag! ( 8b --)
last? IF under c@ or over c! THEN drop ;
: immediate $40 flag! ;
: restrict $80 flag! ;
\ *** Block No. 68 Hexblock 44
\ clearstack hallot heap heap? bp 11 oct 86
Code clearstack
UP R#) D6 move .l user' s0 D6 FP DI) D6 .w move
$FFFE D6 andi D6 reg) SP lea Next end-code \ mu<6D> Code
: hallot ( quan -- ) s0 @ over - swap sp@ 2+ dup rot
dup 1 and ?dup IF over 0< IF negate THEN + THEN
- dup s0 ! 2 pick over - move clearstack s0 ! ;
: heap ( -- addr ) s0 @ 6 + ;
: heap? ( addr -- flag ) heap up@ uwithin ;
| : heapmove ( from -- from )
dup here over - dup hallot
heap swap cmove heap over - last +! reveal ;
\ *** Block No. 69 Hexblock 45
\ Does> ; 24sep86we
Label (dodoes>
.l FP IP suba .w IP RP -) move A7 )+ IP lmove
2 D7 addq D7 SP -) move Next end-code
| : (;code r> last @ name> ! ;
: Does>
compile (;code $4EAB , compile (dodoes> ;
immediate restrict
\ Does> compiles (;code and JSR (doedoes> FP D)
\ *** Block No. 70 Hexblock 46
\ ?head | alignments warning exists? 15jun86we
Variable ?head 0 ?head !
: | ?head @ ?exit -1 ?head ! ;
: align here 1 and allot ;
: halign heap 1 and hallot ;
Variable warning 0 warning !
| : exists? warning @ ?exit last @ current @
(find nip IF space last @ .name ." exists " ?cr THEN ;
\ *** Block No. 71 Hexblock 47
\ Create 06sep86we
: blk@ blk @ ;
Defer makeview ' blk@ Is makeview
: Create
align here makeview , current @ @ ,
name c@ dup 1 $20 uwithin not abort" invalid name"
here last ! 1+ allot align
exists? ?head @
IF 1 ?head +! dup , \ Pointer to Code
halign heapmove $20 flag! dp !
ELSE drop THEN reveal 0 ,
;Code 2 D7 addq D7 SP -) move Next end-code
\ *** Block No. 72 Hexblock 48
\ nfa? 04sep86we
Code nfa? ( thread cfa -- nfa | false )
SP )+ D2 move SP )+ D6 move D6 reg) A0 lea .w
BEGIN A0 ) D6 move 0= IF SP -) clr Next THEN
.l D6 reg) A0 lea 2 D6 addq D6 reg) A1 lea
.b A1 ) D0 move .w $1F D0 andi 1 D0 addq
D0 D1 move 1 D1 andi D1 D0 add D0 D6 add
.b A1 ) D0 move .w $20 D0 andi 0<>
IF D6 reg) D6 move THEN
D2 D6 cmp 0= UNTIL
.l FP A1 suba .w A1 SP -) move Next end-code
\\ : nfa? ( thread cfa -- nfa / false)
>r BEGIN @ dup 0= IF rdrop exit THEN
dup 2+ name> r@ = UNTIL 2+ rdrop ;
\ *** Block No. 73 Hexblock 49
\ >name name> >body .name 14sep86we
: >name ( cfa -- nfa / false ) voc-link
BEGIN @ dup WHILE 2dup 4- swap nfa?
?dup IF -rot 2drop exit THEN REPEAT nip ;
| : (name> ( nfa -- cfa ) count $1F and + even ;
: name> ( nfa -- cfa )
dup (name> swap c@ $20 and IF @ THEN ;
: >body ( cfa -- pfa ) 2+ ;
: .name ( nfa -- )
?dup IF dup heap? IF ." |" THEN
count $1F and type ELSE ." ???" THEN space ;
\ *** Block No. 74 Hexblock 4A
\ : ; Constant Variable bp 12oct86
: Create: Create hide current @ context ! ] 0 ;
: : Create:
;Code .l FP IP suba .w IP RP -) move
.l 2 D7 FP DI) IP lea Next end-code
: ; 0 ?pairs compile unnest [compile] [ reveal ;
immediate restrict
: Constant Create ,
;Code .l 2 D7 FP DI) .w SP -) move Next end-code
: 2Constant Create , , does> 2@ ;
\ *** Block No. 75 Hexblock 4B
\ uallot User Alias bp 12oct86
: Variable Create 2 allot ;
: 2Variable Create 4 allot ;
: uallot ( quan -- offset )
dup udp @ + $FF u> abort" Userarea full"
udp @ swap udp +! ;
: User Create udp @ 1 and udp +! 2 uallot c,
;Code UP R#) D0 move 0 D1 moveq .l 2 D7 FP DI) .b D1 move
.w D1 D0 add D0 SP -) move Next end-code
: Alias ( cfa -- )
Create last @ dup c@ $20 and
IF -2 allot ELSE $20 flag! THEN (name> ! ;
\ *** Block No. 76 Hexblock 4C
\ vp current context also toss 19mar86we
Create vp $10 allot Variable current
: context ( -- addr ) vp dup @ + 2+ ;
| : thru.vocstack ( -- from to ) vp 2+ context ;
\ "Only Forth also Assembler" gives
\ vp: countword = 6 | Only | Forth | Assembler |
: also vp @ &10 > error" Vocabulary stack full"
context @ 2 vp +! context ! ;
: toss vp @ IF -2 vp +! THEN ;
\ *** Block No. 77 Hexblock 4D
\ Vocabulary Forth Only Onlyforth 24nov85we
: Vocabulary
Create 0 , 0 , here voc-link @ , voc-link !
Does> context ! ;
\ | Name | Code | Thread | Coldthread | Voc-link |
Vocabulary Forth
Vocabulary Only
] Does> [ Onlypatch ] 0 vp ! context ! also ; ' Only !
: Onlyforth Only Forth also definitions ;
\ *** Block No. 78 Hexblock 4E
\ definitions order words 24nov85we
: definitions context @ current ! ;
| : .voc ( adr -- ) @ 2- >name .name ;
: order thru.vocstack DO I .voc -2 +LOOP
2 spaces current .voc ;
: words context @
BEGIN @ dup stop? 0= and
WHILE ?cr dup 2+ .name space REPEAT drop ;
\ *** Block No. 79 Hexblock 4F
\ found -text bp 11 oct 86
| : found ( nfa -- cfa n )
dup c@ >r (name> r@ $20 and IF @ THEN
-1 r@ $80 and IF 1- THEN
r> $40 and IF negate THEN ;
\ *** Block No. 80 Hexblock 50
\ (find bp 11 oct 86
\ A0: thread A1: string A2: nfa in thread D0: count
\ D1: act. char D3: act. nfa D4: string
Label notfound SP -) clr Next
Code (find ( str thr - str false/ NFA true )
.w SP )+ D6 move D6 reg) A0 lea
SP ) D6 move D6 reg) A1 lea
.b A1 ) D0 move .w $1F D0 andi A1 D4 lmove
D4 0 # btst 0= IF 1 D0 addq
Label findloop D4 A1 lmove
BEGIN A0 ) D6 move notfound beq D6 reg) A0 lea
.w A1 ) D1 move
.l 2 D6 FP DI) D1 .w sub $1FFF D1 andi 0= UNTIL
.l 2 D6 FP DI) A2 lea A2 D3 move
2 A1 addq 2 A2 addq
\ *** Block No. 81 Hexblock 51
\ (find part 2 09sep86we
.w 0 D2 moveq BEGIN 2 D2 addq D2 D0 cmp >
WHILE A1 )+ A2 )+ cmpm findloop bne REPEAT
ELSE
Label findloop1 A0 ) D6 move notfound beq
.l D6 reg) A0 lea 2 D6 FP DI) A2 lea
A2 D3 move D4 A1 move
.b A1 )+ D1 move A2 )+ D1 sub $1F D1 andi findloop1 bne
D0 D1 move BEGIN 1 D1 subq 0>=
WHILE A1 )+ A2 )+ cmpm findloop1 bne REPEAT
THEN
.l FP D3 sub .w D3 SP ) move
true # SP -) move Next end-code
\ *** Block No. 82 Hexblock 52
\ find ' ['] cas201301
: find ( string -- cfa n / string false )
context dup @ over 2- @ = IF 2- THEN
BEGIN under @ (find IF nip found exit THEN
over vp 2+ u> WHILE swap 2- REPEAT nip false ;
: ' ( -- cfa ) name find 0= abort" ?" ;
: [compile] ' , ; immediate restrict
: ['] ' [compile] Literal ; immediate restrict
: nullstring? ( string -- string false / true )
dup c@ 0= dup IF nip THEN ;
\ *** Block No. 83 Hexblock 53
\ >interpret 24sep86we
Label jump
.l 2 D7 FP DI) .w D6 move D6 reg) IP lea 2 IP addq
Next end-code
Create >interpret 2 allot jump ' >interpret !
\ make >interpret to special Defer
\ *** Block No. 84 Hexblock 54
\ interpret interactive cas201301
Defer notfound
: no.extensions ( string -- ) error" ?" ; \ string not 0
' no.extensions Is notfound
: interpret >interpret ;
| : interpreter ?stack name find ?dup
IF 1 and IF execute >interpret THEN
abort" compile only" THEN
nullstring? ?exit
number? 0= IF notfound THEN >interpret ;
' interpreter >interpret !
\ *** Block No. 85 Hexblock 55
\ compiling [ ] 22mar86we
| : compiler ?stack name find ?dup
IF 0> IF execute >interpret THEN , >interpret THEN
nullstring? ?exit
number? ?dup
IF 0> IF swap [compile] Literal THEN [compile] Literal
>interpret THEN
notfound >interpret ;
: [ ['] interpreter Is >interpret state off ; immediate
: ] ['] compiler Is >interpret state on ;
\ *** Block No. 86 Hexblock 56
\ Defer Is 24sep86we
| : crash true abort" crash" ;
: Defer Create ['] crash ,
;Code .l 2 D7 FP DI) .w D7 move
D7 reg) D6 move .l D6 reg) jmp end-code
: (is r> dup 2+ >r @ ! ;
| : def? ( cfa -- ) @ ['] notfound @ over =
swap ['] >interpret @ = or
not abort" not deferred" ;
: Is ( adr -- ) ' dup def? >body
state @ IF compile (is , exit THEN ! ; immediate
\ *** Block No. 87 Hexblock 57
\ ?stack 08sep86we
| : stackfull ( -- )
depth $20 > abort" tight stack" reveal last?
IF dup heap? IF name> ELSE 4- THEN (forget THEN
true abort" Dictionary full" ;
Code ?stack
UP R#) D6 move .l user' dp D6 FP DI) D0 .w move
.l SP D1 move FP D1 sub .w D0 D1 sub $100 D1 cmpi
$6200 ( u<= ) IF ;c: stackfull ; Assembler THEN
.l user' s0 D6 FP DI) D0 .w move .l SP D1 move FP D1 sub
.w D1 D0 cmp 0>= IF Next THEN ;c: true abort" Stack empty" ;
\\ : ?stack sp@ here - $100 u< IF stackfull THEN
sp@ s0 @ u> abort" Stack empty" ;
\ *** Block No. 88 Hexblock 58
\ .status push load 28aug86we
Defer .status ' noop Is .status
| Create: pull r> r> ! ;
: push ( addr -- ) r> swap dup >r @ >r pull >r >r ;
restrict
: (load ( blk offset -- ) over 0= IF 2drop exit THEN
isfile push loadfile push fromfile push blk push >in push
>in ! blk ! isfile @ loadfile ! .status interpret ;
: load ( blk -- ) 0 (load ;
\ *** Block No. 89 Hexblock 59
\ +load thru +thru --> rdepth depth 19mar86we
: +load ( offset -- ) blk @ + load ;
: thru ( from to -- ) 1+ swap DO I load LOOP ;
: +thru ( off0 off1 -- ) 1+ swap DO I +load LOOP ;
: --> 1 blk +! >in off .status ;
immediate
: rdepth ( -- +n ) r0 @ rp@ 2+ - 2/ ;
: depth ( -- +n ) sp@ s0 @ swap - 2/ ;
\ *** Block No. 90 Hexblock 5A
\ quit (quit abort cas201301
| : prompt state @ IF ." [ " exit THEN ." ok" ;
: (quit BEGIN .status cr query interpret prompt
REPEAT ;
Defer 'quit ' (quit Is 'quit
: quit r0 @ rp! [compile] [ 'quit ;
: standardi/o [ output ] Literal output 4 cmove ;
Defer 'abort ' noop Is 'abort
: abort clearstack end-trace
'abort standardi/o quit ;
\ *** Block No. 91 Hexblock 5B
\ (error abort" error" 29mar86we
Variable scr 1 scr ! Variable r# 0 r# !
: (error ( string -- )
standardi/o space here .name count type space ?cr
blk @ ?dup IF scr ! >in @ r# ! THEN quit ;
' (error errorhandler !
: (abort" "lit swap IF >r clearstack r>
errorhandler perform exit THEN drop ; restrict
| : (err" "lit swap IF errorhandler perform exit THEN
drop ; restrict
: abort" compile (abort" ," align ; immediate restrict
: error" compile (err" ," align ; immediate restrict
\ *** Block No. 92 Hexblock 5C
\ -trailing bp 11 oct 86
Code -trailing ( addr n1 -- addr n2 )
SP )+ D0 move 0<> IF
SP ) D6 move D6 reg) A0 lea D0 A0 adda
Label -trail .b A0 -) D1 move $20 D1 cmpi -trail D0 dbne
.w -1 D0 cmpi 0= IF D0 clr THEN
THEN D0 SP -) move Next end-code
\\
: -trailing ( addr n1 -- addr n2) 2dup bounds
?DO 2dup + 1- c@ bl -
IF LEAVE THEN 1- LOOP ;
\ *** Block No. 93 Hexblock 5D
\ space spaces bp 11 oct 86
$20 Constant bl
: space bl emit ;
: spaces ( u -- ) 0 ?DO space LOOP ;
\ *** Block No. 94 Hexblock 5E
\ hold <# #> sign # #s 02may86we
| : hld ( -- addr ) pad 2- ;
: hold ( char -- ) -1 hld +! hld @ c! ;
: <# hld hld ! ;
: #> ( 32b -- addr +n ) 2drop hld @ hld over - ;
: sign ( n -- ) 0< IF Ascii - hold THEN ;
: # ( +d1 -- +d2 ) base @ ud/mod rot 9 over <
IF [ ascii A ascii 9 - 1- ] Literal + THEN Ascii 0 + hold ;
: #s ( +d -- 0 0 ) BEGIN # 2dup d0= UNTIL ;
\ *** Block No. 95 Hexblock 5F
\ print numbers 24dec83ks
: d.r -rot under dabs <# #s rot sign #>
rot over max over - spaces type ;
: .r swap extend rot d.r ;
: u.r 0 swap d.r ;
: d. 0 d.r space ;
: . extend d. ;
: u. 0 d. ;
\ *** Block No. 96 Hexblock 60
\ .s list c/l l/s bp 18May86
: .s
sp@ s0 @ over - $20 umin bounds ?DO I @ u. 2 +LOOP ;
$40 Constant c/l \ Screen line length
$10 Constant l/s \ lines per screen
: list ( blk -- )
scr ! ." Scr " scr @ dup u. ." Dr " drv? .
l/s 0 DO
cr I 2 .r space scr @ block I c/l * + c/l -trailing type
LOOP cr ;
\ *** Block No. 97 Hexblock 61
\ multitasker primitives 14sep86we
Code pause Next end-code
: lock ( addr -- )
dup @ up@ = IF drop exit THEN
BEGIN dup @ WHILE pause REPEAT up@ swap ! ;
: unlock ( addr -- ) dup lock off ;
Label wake .l 2 A7 addq A7 )+ A0 move 2 A0 subq
A0 A1 move FP A1 suba .w A1 UP R#) move
$3C3C ( # D6 move ) # A0 ) move
8 A0 D) D6 move D6 reg) SP lea
SP )+ D6 move D6 reg) RP lea
SP )+ D6 move D6 reg) IP lea Next end-code
\ *** Block No. 98 Hexblock 62
\ buffer mechanism cas201301
User isfile 0 isfile ! \ addr of file control block
Variable fromfile 0 fromfile !
Variable prev 0 prev ! \ Listhead
| Variable buffers 0 buffers ! \ Semaphore
$408 Constant b/buf \ physical size
\\ Structure of buffer: 0 : link
2 : file
4 : blocknumber
6 : statusflags
8 : Data ... 1 Kb ...
Statusflag bits : 15 1 -> updated
file : -1 -> empty buffer, 0 -> no fcb, direct acces
else addr of fcb ( system dependent )
\ *** Block No. 99 Hexblock 63
\ search for blocks in memory with (CORE? cas201301
\ D0:blk D1:file A0:bufadr A1:previous
Label thisbuffer?
2 A0 D) D1 cmp 0= IF 4 A0 D) D0 cmp THEN rts
Code (core? ( blk file -- adr\blk file )
2 SP D) D0 move SP ) D1 move
UP R#) D6 move .l user' offset D6 FP DI) D0 .w add
prev R#) D6 move D6 reg) A0 lea
thisbuffer? bsr 0= IF .l FP A0 suba
Label blockfound 2 SP addq 8 A0 addq .w A0 SP ) move
.l ' exit @ R#) jmp .w THEN
BEGIN A0 A1 lmove A1 ) D6 move 0= IF Next THEN
D6 reg) A0 lea thisbuffer? bsr 0= UNTIL
A0 ) A1 ) move prev R#) A0 ) move
.l FP A0 suba .w A0 prev R#) move
blockfound bra end-code
\ *** Block No. 100 Hexblock 64
\ (core? 17nov85we
\\
| : this? ( blk file bufadr -- flag )
dup 4+ @ swap 2+ @ d= ;
| : (core? ( blk file -- dataaddr / blk file )
BEGIN over offset @ + over prev @ this?
IF rdrop 2drop prev @ 8 + exit THEN
2dup >r offset @ + >r prev @
BEGIN dup @ ?dup 0= IF rdrop rdrop drop exit THEN
dup r> r> 2dup >r >r rot this? 0=
WHILE nip REPEAT
dup @ rot ! prev @ over ! prev ! rdrop rdrop
REPEAT ;
\ *** Block No. 101 Hexblock 65
\ r/w 11sep86we
Defer r/w
\ *** Block No. 102 Hexblock 66
\ backup emptybuf readblk 11sep86we
: backup ( bufaddr -- ) dup 6+ @ 0<
IF 2+ dup @ 1+ \ buffer empty if file = -1
IF input push output push standardi/o
dup 6+ over 2+ @ 2 pick @ 0 r/w
abort" write error"
THEN 4+ dup @ $7FFF and over ! THEN drop ;
: emptybuf ( bufaddr -- ) 2+ dup on 4+ off ;
| : readblk ( blk file addr -- blk file addr )
dup emptybuf
input push output push standardi/o >r
over offset @ + over r@ 8 + -rot 1 r/w
abort" read error" r> ;
\ *** Block No. 103 Hexblock 67
\ take mark updated? full? core? cas20130105
| : take ( -- bufaddr) prev
BEGIN dup @ WHILE @ dup 2+ @ -1 = UNTIL
buffers lock dup backup ;
| : mark ( blk file bufaddr -- blk file )
2+ >r 2dup r@ ! offset @ + r@ 2+ ! r> 4+ off
buffers unlock ;
| : updates? ( -- bufaddr / flag )
prev BEGIN @ dup WHILE dup 6+ @ 0< UNTIL ;
: updated? ( blk -- flg ) block 2- @ 0< ;
: full? ( -- flag ) prev BEGIN @ dup @ 0= UNTIL 6+ @ 0< ;
: core? ( blk file -- addr /false ) (core? 2drop false ;
\ *** Block No. 104 Hexblock 68
\ block & buffer manipulation b08sep86we
: (buffer ( blk file -- addr )
BEGIN (core? take mark REPEAT ;
: (block ( blk file -- addr )
BEGIN (core? take readblk mark REPEAT ;
Code isfile@ ( -- addr )
UP R#) D6 move .l user' isfile D6 FP DI) SP -) .w move
Next end-code
: buffer ( blk -- addr ) isfile@ (buffer ;
: block ( blk -- addr ) isfile@ (block ;
\ *** Block No. 105 Hexblock 69
\ block & buffer manipulation cas20130501
: update $80 prev @ 6+ c! ;
: save-buffers buffers lock
BEGIN updates? ?dup WHILE backup REPEAT
buffers unlock ;
: empty-buffers buffers lock prev
BEGIN @ ?dup WHILE dup emptybuf REPEAT
buffers unlock ;
: flush save-buffers empty-buffers ;
\ *** Block No. 106 Hexblock 6A
\ moving blocks cas201301
| : fromblock ( blk -- adr ) fromfile @ (block ;
| : (copy ( from to -- )
dup isfile@ core? IF prev @ emptybuf THEN
full? IF save-buffers THEN
offset @ + isfile@ rot fromblock 6 - 2! update ;
| : blkmove ( from to quan --) save-buffers >r
over r@ + over u> >r 2dup u< r> and
IF r@ r@ d+ r> 0 ?DO -1 -2 d+ 2dup (copy LOOP
ELSE r> 0 ?DO 2dup (copy 1 1 d+ LOOP
THEN save-buffers 2drop ;
: copy ( from to --) 1 blkmove ;
: convey ( [blk1 blk2] [to.blk --)
swap 1+ 2 pick - dup 0> not abort" No!" blkmove ;
\ *** Block No. 107 Hexblock 6B
\ Allocating buffers bp 18May86
$FFFE Constant limit Variable first
: allotbuffer ( -- )
first @ r0 @ - b/buf 2+ u< ?exit
b/buf negate first +! first @ dup emptybuf
prev @ over ! prev ! ;
: freebuffer ( -- )
first @ limit b/buf - u<
IF first @ backup prev
BEGIN dup @ first @ - WHILE @ REPEAT
first @ @ swap ! b/buf first +! THEN ;
: all-buffers BEGIN first @ allotbuffer first @ = UNTIL ;
\ *** Block No. 108 Hexblock 6C
\ endpoints of forget 14sep86we
| : |? ( nfa -- flag ) c@ $20 and ;
| : forget? ( adr nfa -- flag ) \ code in heap or above adr ?
name> under 1+ u< swap heap? or ;
| : endpoints ( addr -- addr symb )
heap voc-link >r
BEGIN r> @ ?dup \ through all Vocabs
WHILE dup >r 4- >r \ link on returnstack
BEGIN r> @ >r over 1- dup r@ u< \ until link or
swap r@ 2+ name> u< and \ code under adr
WHILE r@ heap? [ 2dup ] UNTIL \ search for name in heap
r@ 2+ |? IF over r@ 2+ forget?
IF r@ 2+ (name> 2+ umax THEN \ then update symb
THEN REPEAT rdrop REPEAT ;
\ *** Block No. 109 Hexblock 6D
\ remove, -words, -tasks bp/ks14sep86we
: remove ( dic sym thread - dic sym )
BEGIN dup @ ?dup \ unlink forg. words
WHILE dup heap?
IF 2 pick over u> ELSE 3 pick over 1+ u< THEN
IF @ over ! ( unlink word) ELSE nip THEN REPEAT drop ;
| : remove-words ( dic sym -- dic sym )
voc-link BEGIN @ ?dup
WHILE dup >r 4- remove r> REPEAT ;
| : remove-tasks ( dic -- ) up@
BEGIN 2+ dup @ up@ - WHILE 2dup @ swap here uwithin
IF dup @ 2+ @ over ! 2-
ELSE @ THEN REPEAT 2drop ;
\ *** Block No. 110 Hexblock 6E
\ remove-vocs forget-words bp 11oct86
| : remove-vocs ( dic symb -- dic symb )
voc-link remove thru.vocstack
DO 2dup I @ -rot uwithin
IF [ ' Forth 2+ ] Literal I ! THEN -2 +LOOP
2dup current @ -rot uwithin
IF [ ' Forth 2+ ] Literal current ! THEN ;
| : remove-codes ( dic symb -- dic symb )
next-link remove ;
Defer custom-remove ' noop Is custom-remove
| : forget-words ( dic symb -- )
over remove-tasks remove-vocs remove-words remove-codes
custom-remove heap swap - hallot dp ! last off ;
\ *** Block No. 111 Hexblock 6F
\ deleting words from dict. bp 11oct86
: clear here dup up@ forget-words dp ! ;
: (forget ( adr -- ) dup heap? abort" is symbol"
endpoints forget-words ;
: forget ' dup [ dp ] Literal @ u< abort" protected"
>name dup heap?
IF name> ELSE 4- THEN (forget ;
: empty [ dp ] Literal @ up@ forget-words
[ udp ] Literal @ udp ! ;
\ *** Block No. 112 Hexblock 70
\ save bye stop? ?cr cas201301
: save here up@ forget-words
voc-link @ BEGIN dup 4- @ over 2- ! @ ?dup 0= UNTIL
up@ origin $100 cmove ;
: bye flush empty (bye ;
| : end? key $FF and dup 3 = \ Stop key
swap $1B = or \ Escape key
IF true rdrop THEN ;
: stop? ( -- flag ) key? IF end? end? THEN false ;
: ?cr col c/l u> IF cr THEN ;
\ *** Block No. 113 Hexblock 71
\ in/output structure 25mar86we
| : Out: Create dup c, 2+ Does> c@ output @ + perform ;
: Output: Create: Does> output ! ;
0 Out: emit Out: cr Out: type Out: del
Out: page Out: at Out: at? drop
: row ( -- row ) at? drop ;
: col ( -- col ) at? nip ;
| : In: Create dup c, 2+ Does> c@ input @ + perform ;
: Input: Create: Does> input ! ;
0 In: key In: key? In: decode In: expect drop
\ *** Block No. 114 Hexblock 72
\ Alias only definitionen 29jan85bp
Only definitions Forth
: seal 0 ['] Only >body ! ; \ kill all words in Only
' Only Alias Only
' Forth Alias Forth
' words Alias words
' also Alias also
' definitions Alias definitions
Host Target
\ *** Block No. 115 Hexblock 73
\ 'cold 'restart 19mar86we
| : init-vocabularys voc-link @
BEGIN dup 2- @ over 4- ! @ ?dup 0= UNTIL ;
| : init-buffers 0 prev ! limit first ! all-buffers ;
Defer 'cold ' noop Is 'cold
| : (cold origin up@ $100 cmove
init-vocabularys init-buffers 'cold page wrap
Onlyforth cr &27 spaces logo count type cr (restart ;
Defer 'restart ' noop Is 'restart
| : (restart ['] (quit Is 'quit drvinit 'restart
[ errorhandler ] Literal @ errorhandler !
['] noop Is 'abort abort ;
\ *** Block No. 116 Hexblock 74
\ cold bootsystem restart 16oct86we
Label buserror &14 # A7 adda ;c: true abort" Bus Error !" ;
Label adrerror &14 # A7 adda ;c: true abort" Adress Error !" ;
Label illegal 6 A7 addq
;c: true abort" Illegal Instruction !" ;
Label div0 6 A7 addq ;c: true abort" Division by 0 !" ;
| Create save_ssp 4 allot
Code cold here >cold !
$A00A , \ hide mouse
' (cold >body FP D) IP lea
\ *** Block No. 117 Hexblock 75
\ restart 16oct86we
Label bootsystem .l 0 D7 moveq
.w user' s0 # D7 move origin D7 FP DI) D6 move
.l D6 reg) SP lea .w 6 D6 addq D6 UP R#) move
.w user' r0 # D7 move origin D7 FP DI) D6 move
.l D6 reg) RP lea RP ) clr 0 D6 moveq
.w D0 move<sr D0 $0D # btst ( src<>dst) 0= IF
.l A7 -) clr .w $20 # A7 -) move 1 trap
.l D0 save_ssp R#) move 6 A7 addq THEN
.w buserror # D6 move .l D6 reg) A0 lea A0 8 #) move
.w adrerror # D6 move .l D6 reg) A0 lea A0 $0C #) move
.w illegal # D6 move .l D6 reg) A0 lea A0 $10 #) move
.w div0 # D6 move .l D6 reg) A0 lea A0 $14 #) move
.w wake # D6 move .l D6 reg) A0 lea A0 $8C #) move
Next end-code
\ *** Block No. 118 Hexblock 76
\ System dependent load screen bp 11oct86
Code restart here >restart !
' (restart >body FP D) IP lea bootsystem bra end-code
2 $0C +thru \ Atari 520 ST Interface
Host ' Transient 8 + @ Transient Forth context @ 6 + !
\ Tlatest aus Transient wird Tlatest in Forth
Target Forth also definitions
: forth-83 ; \ last word in Dictionary
\ *** Block No. 119 Hexblock 77
\ System patchup 14sep86we
Forth definitions
$D3AA s0 ! $D7AA r0 ! \ gives &10 Buffers
s0 @ dup s0 2- ! 6 + s0 8 - !
here dp !
Host Tudp @ Target udp !
Host Tvoc-link @ Target voc-link !
Host Tnext-link @ Target next-link !
Host move-threads
\ *** Block No. 120 Hexblock 78
\ BIOS - Calls 09sep86we
Code bconstat ( dev -- fl )
SP )+ D0 move D0 A7 -) move 1 # A7 -) move $0D trap
4 A7 addq D0 SP -) move Next end-code
Code bcostat ( dev -- fl )
SP )+ D0 move D0 A7 -) move 8 # A7 -) move $0D trap
4 A7 addq D0 SP -) move Next end-code
Code bconin ( dev -- char )
SP )+ D0 move D0 A7 -) move 2 # A7 -) move $0D trap
4 A7 addq .w D0 D1 move .l 8 # D0 lsr .b D1 D0 move
.w D0 SP -) move Next end-code
Code bconout ( char dev -- )
SP )+ D0 move SP )+ A7 -) move D0 A7 -) move
3 # A7 -) move $0D trap 6 A7 addq Next end-code
\ *** Block No. 121 Hexblock 79
\ STkey? getkey cas201301
$08 Constant #bs $0D Constant #cr
$0A Constant #lf $1B Constant #esc
: con! ( 8b -- ) 2 bconout ;
: curon #esc con! Ascii e con! ;
: curoff #esc con! Ascii f con! ;
: wrap #esc con! Ascii v con! ;
: cur< #esc con! Ascii D con! -1 out +! ;
: cur> #esc con! Ascii C con! 1 out +! ;
: STkey? ( -- fl ) 2 bconstat ;
: getkey ( -- char ) STkey? IF 2 bconin ELSE 0 THEN ;
: STkey ( -- char ) curon
BEGIN pause STkey? UNTIL curoff getkey ;
\ *** Block No. 122 Hexblock 7A
\ (ins (del cas201301
| Variable maxchars
| : (del ( addr pos1 -- addr pos2 ) 2dup cur<
at? >r >r 2dup + over span @ - negate under type space
r> r> at
>r + dup 1- r> cmove -1 span +! 1- ;
| : (ins ( addr pos1 -- addr pos2 ) 2dup
+ over span @ - negate >r dup dup 1+ r@ cmove>
bl over c! r> 1+ at? >r >r type r> r> at
1 span +! ;
\ *** Block No. 123 Hexblock 7B
\ decode cas201301
: STdecode ( addr pos1 key -- addr pos2 )
$4D00 case? IF dup span @ < IF cur> 1+ THEN exit THEN
$4B00 case? IF dup IF cur< 1- THEN exit THEN
$5200 case? IF dup span @ - IF (ins THEN exit THEN
$FF and dup 0= IF drop exit THEN
#bs case? IF dup IF (del THEN exit THEN
$7F case? IF span @ 2dup < and
IF cur> 1+ (del THEN exit THEN
#cr case? IF span @ maxchars !
dup at? rot span @ - - at exit THEN
>r 2dup + r@ swap c! r> emit
dup span @ = IF 1 span +! THEN 1+ ;
\ *** Block No. 124 Hexblock 7C
\ expect keyboard 25mar86we
: STexpect ( addr len -- ) maxchars !
span off 0
BEGIN span @ maxchars @ u< WHILE key decode REPEAT
2drop space ;
Input: keyboard [ here input ! ]
STkey STkey? STdecode STexpect ;
\ *** Block No. 125 Hexblock 7D
\ emit cr del page at at? type cas201301
| Variable out 0 out ! | &80 Constant c/row
: STemit ( 8b -- ) 5 bconout 1 out +! pause ;
: STcr #cr con! #lf con!
out @ c/row / 1+ c/row * out ! ;
: STdel #bs con! space #bs con! -2 out +! ;
: STpage #esc con! Ascii E con! out off ;
: STat ( row col -- ) #esc con! Ascii Y con!
over $20 + con! dup $20 + con!
swap c/row * + out ! ;
: STat? ( -- row col ) out @ c/row /mod swap ;
\\
: STtype ( addr len --) 0 ?DO count emit LOOP drop ;
\ *** Block No. 126 Hexblock 7E
\ Output 16oct86we
Code STtype ( addr len -- )
SP )+ D3 move SP )+ D6 move D3 tst 0<>
IF D3 out R#) add 1 D3 subq
Atari ST: another optimization to STtype
2020-07-22 09:17:15 +00:00
D3 DO D6 reg) A0 lea 0 D1 moveq .b A0 ) D1 move
Atari ST: STtype optimization
2020-07-22 08:15:38 +00:00
FP A7 -) lmove .w D1 A7 -) move 5 # A7 -) move 3 # A7 -) move
Tools: fb2fth (Forth-Block to Forth Source) in gforth
2020-07-20 21:47:02 +00:00
$0D trap 6 A7 addq 1 D6 addq A7 )+ FP lmove LOOP
THEN ;c: pause ;
Output: display [ here output ! ]
STemit STcr STtype STdel STpage STat STat? ;
| Code term .l save_ssp R#) A7 -) move .w $20 # A7 -) move
1 trap 6 A7 addq A7 -) clr 1 trap end-code
| : (bye curoff term ;
\ *** Block No. 127 Hexblock 7F
\ b/blk drive >drive drvinit 10sep86we
$400 Constant b/blk
| Variable (drv 0 (drv !
Create (blk/drv
4 allot $15F (blk/drv ! $15F (blk/drv 2+ !
: blk/drv ( -- n ) (blk/drv (drv @ 2* + @ ;
: drive ( drv# -- ) $1000 * offset ! ;
: >drive ( block drv# -- block' ) $1000 * + offset @ - ;
: drv? ( block -- drv# ) offset @ + $1000 / ;
: drvinit noop ;
: drv0 0 drive ; : drv1 1 drive ;
\ *** Block No. 128 Hexblock 80
\ readsector writesector cas201301
Code rwabs ( r/wf adr rec# -- flag )
.l FP A7 -) move
.w SP )+ D0 move SP )+ D6 move D6 reg) A0 lea
SP )+ D1 move 2 D1 addq
(drv R#) A7 -) move \ Drivenumber
D0 A7 -) move \ rec#
2 # A7 -) move \ number sectors
.l A0 A7 -) move \ Address
.w D1 A7 -) move \ r/w flag
4 # A7 -) move \ function number
$0D trap $0E # A7 adda .l A7 )+ FP move
.w D0 SP -) move \ error flag
Next end-code
\ *** Block No. 129 Hexblock 81
\ diskchange? 09nov86we
| Code mediach? ( -- flag )
.w (drv R#) A7 -) move 9 # A7 -) move $0D trap 4 A7 addq
D0 SP -) move Next end-code
| Code getblocks ( -- n )
.w (drv R#) A7 -) move 7 # A7 -) move $0D trap 4 A7 addq
D0 A0 move .w $0E # A0 adda A0 ) D0 move D0 SP -) move
Next end-code
\ *** Block No. 130 Hexblock 82
\ STr/w 10sep86we
: STr/w ( adr blk file r/wf -- flag )
swap abort" no file"
1 xor -rot $1000 /mod dup (drv !
1 u> IF . ." beyond capacity" nip exit THEN
mediach? IF getblocks (blk/drv (drv @ 2* + ! THEN
dup blk/drv > IF drop 2drop true
ELSE 9 + 2* rwabs THEN ;
' STr/w Is r/w
\ *** Block No. 131 Hexblock 83
\ Basepage (TOS PRG Header) cas201301
$601A , \ BRA to start of PGM
here $1A allot $1A erase \ clear basepage info
Assembler
.l A7 A5 move 4 A5 D) A5 move \ start basepage
$1.0600 # D0 move D0 D1 move \ store size of forth and
A5 D1 add .w $FFFE D1 andi .l D1 A7 move \ stack
D0 A7 -) move A5 A7 -) move .w A7 -) clr
$4A # A7 -) move 1 trap $0C # A7 adda \ mshrink
$100 $1C - # A5 adda A5 FP lmove \ FP to start of Forth
\ *** Block No. 132 Hexblock 84
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