\ *** Block No. 2, Hexblock 2 \ FORTH Preamble and ID uho 19May2005 Assembler nop 0 jmp here 2- >label >boot nop 0 jmp here 2- >label >cold nop 0 jmp here 2- >label >restart here dup origin! \ Hier beginnen die Kaltstartwerte der Benutzervariablen 6 rst 0 jmp end-code \ for multitasker $100 allot | Create logo ," volksFORTH-83 rev. 3.80a" \ *** Block No. 3, Hexblock 3 \ Assembler Labels Next Forth-Register 29Jun86 Label dpush D push Label hpush H push Label >next IP ldax IP inx A L mov IP ldax IP inx A H mov Label >next1 M E mov H inx M D mov xchg pchl end-code Variable RP Variable UP \ IP in BC \ W in DE \ SP in SP Variable IPsave \ *** Block No. 4, Hexblock 4 \ Assembler Macros 20Oct86 Compiler Assembler also definitions Forth : Next T >next jmp [ Forth ] ; T hpush Forth Constant hpush T dpush Forth Constant dpush T >next Forth Constant >next : rpush ( reg -- ) RP lhld H dcx DUP M mov ( high ) H dcx 1+ M mov ( low ) RP shld [ Forth ] ; : rpop ( reg -- ) RP lhld M over 1+ mov ( low ) H inx M swap mov ( high ) H inx RP shld [ Forth ] ; \ rpush und rpop gehen nicht mit HL : mvx ( src dest -- ) 2dup mov ( high ) 1+ swap 1+ swap mov ( low ) [ Forth ] ; Target \ *** Block No. 5, Hexblock 5 \ recover ;c: noop 20Oct86 Create recover Assembler W pop IP rpush W IP mvx Next end-code Compiler Assembler also definitions Forth : ;c: 0 T recover call end-code ] [ Forth ] ; Target | Code di di Next end-code | Code ei ei Next end-code Code noop >next here 2- ! end-code \ *** Block No. 6, Hexblock 6 \ User variables 04Oct87 Constant origin 8 uallot drop \ Multitasker \ Felder: entry link spare SPsave \ Laenge kompatibel zum 68000 und 6502 volksFORTH User s0 User r0 User dp User offset 0 offset ! User base $0A base ! User output User input User errorhandler \ pointer for Abort" -code User voc-link User udp \ points to next free addr in User \ *** Block No. 7, Hexblock 7 \ manipulate system pointers 11Jun86 Code sp@ ( -- addr) 0 H lxi SP dad hpush jmp end-code Code sp! ( addr --) H pop sphl Next end-code Code up@ ( -- addr) UP lhld hpush jmp end-code Code up! ( addr --) H pop UP shld Next end-code \ *** Block No. 8, Hexblock 8 \ manipulate returnstack 11Jun86 Code rp@ ( -- addr ) RP lhld hpush jmp end-code Code rp! ( addr -- ) H pop RP shld Next end-code Code >r ( 16b -- ) D pop D rpush Next end-code restrict Code r> ( -- 16b ) D rpop D push Next end-code restrict \ *** Block No. 9, Hexblock 9 \ r@ rdrop exit unnest ?exit 07Oct87 Code r@ ( -- 16b ) RP lhld M E mov H inx M D mov D push Next end-code Code rdrop RP lhld H inx H inx RP shld Next end-code restrict Code exit Label >exit IP rpop Next end-code Code unnest >exit here 2- ! Code ?exit ( flag -- ) H pop H A mov L ora >exit jnz Next end-code Code 0=exit ( flag -- ) H pop H A mov L ora >exit jz Next end-code \ : ?exit ( flag -- ) IF rdrop THEN ; \ *** Block No. 10, Hexblock a \ execute perform 11Jun86 18Nov87 Code execute ( cfa -- ) H pop >Next1 jmp end-code Code perform ( 'cfa -- ) H pop M A mov H inx M H mov A L mov >Next1 jmp end-code \ \\ \ : perform ( addr -- ) @ execute ; \ *** Block No. 11, Hexblock b \ c@ c! ctoggle 07Oct87 Code c@ ( addr -- 8b ) H pop M L mov 0 H mvi hpush jmp end-code Code c! ( 16b addr -- ) H pop D pop E M mov Next end-code Code flip ( 16b1 -- 16b2 ) H pop H A mov L H mov A L mov Hpush jmp end-code Code ctoggle ( 8b addr -- ) H pop D pop M A mov E xra A M mov Next end-code \ \\ \ : ctoggle ( 8b addr --) under c@ xor swap c! ; \ *** Block No. 12, Hexblock c \ @ ! 2@ 2! 11Jun86 18Nov87 Code @ ( addr -- 16b ) H pop Label fetch M E mov H inx M D mov D push Next end-code Code ! ( 16b addr -- ) H pop D pop E M mov H inx D M mov Next end-code Code 2@ ( addr -- 32b ) H pop H push H inx H inx M E mov H inx M D mov H pop D push M E mov H inx M D mov D push Next end-code Code 2! ( 32b addr -- ) H pop D pop E M mov H inx D M mov H inx D pop E M mov H inx D M mov Next end-code \ *** Block No. 13, Hexblock d \ +! drop swap 11Jun86 18Nov87 Code +! ( 16b addr -- ) H pop Label +store D pop M A mov E add A M mov H inx M A mov D adc A M mov Next end-code \ : +! ( n addr -- ) under @ + swap ! ; Code drop ( 16b -- ) H pop Next end-code Code swap ( 16b1 16b2 -- 16b2 16b1 ) H pop xthl hpush jmp end-code \ *** Block No. 14, Hexblock e \ dup ?dup 16May86 Code dup ( 16b -- 16b 16b ) H pop H push hpush jmp end-code Code ?dup ( 16b -- 16b 16b / false) H pop H A mov L ora 0<> ?[ H push ]? hpush jmp end-code \ \\ \ : ?dup ( 16b -- 16b 16b / false) dup IF dup THEN ; \ \ : dup ( 16b -- 16b 16b ) sp@ @ ; \ *** Block No. 15, Hexblock f \ over rot nip under 11Jun86 Code over ( 16b1 16b2 - 16b1 16b2 16b1 ) D pop H pop H push dpush jmp end-code Code rot ( 16b1 16b2 16b3 - 16b2 16b3 16b1 ) D pop H pop xthl dpush jmp end-code Code nip ( 16b1 16b2 -- 16b2) H pop D pop hpush jmp end-code Code under ( 16b1 16b2 -- 16b2 16b1 16b2) H pop D pop H push dpush jmp end-code \ \\ \ : over >r swap r> swap ; \ : rot >r dup r> swap ; \ : nip swap drop ; \ : under swap over ; \ *** Block No. 16, Hexblock 10 \ -rot pick roll -roll 11Jun86 Code -rot ( 16b1 16b2 16b3 -- 16b3 16b1 16b2 ) H pop D pop xthl H push D push Next end-code Code pick ( n -- 16b.n ) H pop H dad SP dad M E mov H inx M D mov D push 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* + ! ; \ \\ \ : -rot ( 16b1 16b2 16b3 -- 16b3 16b1 16b2 ) rot rot ; \ : pick ( n -- 16b.n ) 1+ 2* sp@ + @ ; \ *** Block No. 17, Hexblock 11 \ double word stack manipulation 09May86 Code 2swap ( 32b1 32b2 -- 32b2 32b1) H pop D pop xthl H push 5 H lxi SP dad M A mov D M mov A D mov H dcx M A mov E M mov A E mov H pop dpush jmp end-code Code 2drop ( 32b -- ) H pop H pop Next end-code Code 2dup ( 32b -- 32b 32b) H pop D pop D push H push dpush jmp end-code \ \\ \ : 2swap ( 32b1 32b2 -- 32b2 32b1) rot >r rot r> ; \ : 2drop ( 32b -- ) drop drop ; \ : 2dup ( 32b -- 32b 32b) over over ; \ *** Block No. 18, Hexblock 12 \ + and or xor not 09May86 Code + ( n1 n2 -- n3 ) H pop D pop D dad hpush jmp end-code Code or ( 16b1 16b2 -- 16b3 ) H pop D pop H A mov D ora A H mov L A mov E ora A L mov hpush jmp end-code Code and ( 16b1 16b2 -- 16b3 ) H pop D pop H A mov D ana A H mov L A mov E ana A L mov hpush jmp end-code Code xor ( 16b1 16b2 -- 16b3 ) H pop D pop H A mov D xra A H mov L A mov E xra A L mov hpush jmp end-code Code not ( 16b1 -- 16b2 ) H pop Label >not H A mov cma A H mov L A mov cma A L mov hpush jmp end-code \ *** Block No. 19, Hexblock 13 \ - negate 16May86 Code - ( n1 n2 -- n3 ) D pop H pop L A mov E sub A L mov H A mov D sbb A H mov hpush jmp end-code Code negate ( n1 -- n2 ) H pop H dcx >not jmp end-code \ \\ \ : - ( n1 n2 -- n3 ) negate + ; \ *** Block No. 20, Hexblock 14 \ dnegate d+ 10Mar86 18Nov87 Code dnegate ( d1 -- -d1 ) H pop Label >dnegate D pop A sub E sub A E mov 0 A mvi D sbb A D mov 0 A mvi L sbb A L mov 0 A mvi H sbb A H mov dpush jmp end-code Code d+ ( d1 d2 -- d3) 6 H lxi SP dad M E mov C M mov H inx M D mov B M mov B pop H pop D dad xchg H pop L A mov C adc A L mov H A mov B adc A H mov B pop dpush jmp end-code \ *** Block No. 21, Hexblock 15 \ 1+ 2+ 3+ 4+ 6+ 1- 2- 4- 27Apr86 Code 1+ ( n1 -- n2 ) H pop H inx hpush jmp end-code Code 2+ ( n1 -- n2 ) H pop H inx H inx hpush jmp end-code Code 3+ ( n1 -- n2 ) H pop H inx H inx H inx hpush jmp end-code Code 4+ ( n1 -- n2 ) H pop 4 D lxi D dad hpush jmp end-code | Code 6+ ( n1 -- n2 ) H pop 6 D lxi D dad hpush jmp end-code Code 1- ( n1 -- n2 ) H pop H dcx hpush jmp end-code Code 2- ( n1 -- n2 ) H pop H dcx H dcx hpush jmp end-code Code 4- ( n1 -- n2 ) H pop -4 D lxi D dad hpush jmp end-code \ *** Block No. 22, Hexblock 16 \ number Constants 07Oct87 -1 Constant true 0 Constant false 0 ( -- 0 ) Constant 0 1 ( -- 1 ) Constant 1 2 ( -- 2 ) Constant 2 3 ( -- 3 ) Constant 3 4 ( -- 4 ) Constant 4 -1 ( -- -1 ) Constant -1 Code on ( addr -- ) H pop $FF A mvi Label set A M mov H inx A M mov Next Code off ( addr -- ) H pop A xra set jmp end-code \ : on ( addr -- ) true swap ! ; \ : off ( addr -- ) false swap ! ; \ *** Block No. 23, Hexblock 17 \ words for number literals 16May86 Code lit ( -- 16b ) IP ldax A L mov IP inx IP ldax A H mov IP inx hpush jmp end-code Code clit ( -- 8b ) IP ldax A L mov 0 H mvi IP inx hpush jmp end-code : Literal ( 16b -- ) dup $FF00 and IF compile lit , exit THEN compile clit c, ; immediate restrict \ *** Block No. 24, Hexblock 18 \ comparision words 18Nov87 Label (u< ( HL,DE -> HL u< DE c,z ) H A mov D cmp rnz L A mov E cmp ret Label (< ( HL,DE -> HL < DE c,z ) H A mov D xra (u< jp D A mov H cmp ret Label yes true H lxi hpush jmp Code u< ( u1 u2 -- flag ) D pop H pop Label uless (u< call yes jc Label no false H lxi hpush jmp Code < ( n1 n2 -- flag ) D pop H pop Label less (< call yes jc no jmp end-code Code u> ( u1 u2 -- flag ) H pop D pop uless jmp end-code Code > ( n1 n2 -- flag ) H pop D pop less jmp end-code \ *** Block No. 25, Hexblock 19 \ comparision words 18Nov87 Code 0< ( n1 n2 -- flag ) H pop Label negative H dad yes jc no jmp end-code Code 0> ( n -- flag ) H pop H A mov A ora no jm L ora yes jnz no jmp end-code Code 0= ( n -- flag ) H pop Label zero= H A mov L ora yes jz no jmp end-code Code 0<> ( n -- flag ) H pop H A mov L ora yes jnz no jmp end-code Code = ( n1 n2 -- flag ) H pop D pop L A mov E cmp no jnz H A mov D cmp no jnz yes jmp end-code \ *** Block No. 26, Hexblock 1a \ \\ comparision words high level 18Nov87 \ : 0< ( n1 -- flag ) 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= ; \ : uwithin ( u1 [low up[ -- flag ) over - -rot - u> ; \ | : minimax ( n1 n2 flag -- n3 ) rdrop IF swap THEN drop ; \ : 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 ; \ *** Block No. 27, Hexblock 1b \ uwthin double number comparison words 18Nov87 Code uwithin ( u1 [low up[ -- flag ) H pop D pop xthl (u< call cs ?[ H pop no jmp ]? D pop (u< call yes jc no jmp end-code Code d0= ( d -- flag ) H pop H A mov L ora H pop no jnz zero= jmp end-code : d= ( d1 d2 -- flag ) rot = -rot = and ; : d< ( d1 d2 -- flag ) rot 2dup = IF 2drop u< exit THEN > nip nip ; \ \\ \ : d0= ( d -- flag ) or 0= ; \ *** Block No. 28, Hexblock 1c \ minimum maximum 18Nov87 Code umax ( u1 u2 -- u3 ) H pop D pop (u< call Label minimax cs ?[ xchg ]? hpush jmp end-code Code umin ( u1 u2 -- u3 ) H pop D pop (u< call cmc minimax jmp end-code Code max ( n1 n2 -- n3 ) H pop D pop (< call minimax jmp end-code Code min ( n1 n2 -- n3 ) H pop D pop (< call cmc minimax jmp end-code \ *** Block No. 29, Hexblock 1d \ sign extension absolute values 18Nov87 Code extend ( n -- d ) H pop H push negative jmp end-code Code abs ( a -- u ) H pop H A mov A ora hpush jp H dcx >not jmp end-code Code dabs ( d -- ud ) H pop H A mov A ora hpush jp >dnegate jmp end-code \ *** Block No. 30, Hexblock 1e \ branch ?branch 20Nov87 Code branch ( -- ) Label >branch IP H mvx M E mov H inx M D mov H dcx D dad H IP mvx Next end-code Code ?branch ( fl -- ) H pop H A mov L ora >branch jz IP inx IP inx Next end-code \ \\ \ : branch r> dup @ + >r ; \ *** Block No. 31, Hexblock 1f \ loop primitives 11Jun86 20Nov87 Code bounds ( start count -- limit start ) H pop D pop D dad H push D push Next end-code Code endloop RP lhld 6 D lxi D dad RP shld next end-code restrict \ \\ dodo puts "index | limit | adr.of.DO" on return-stack \ : bounds ( start count -- limit start ) over + swap ; \ \ | : 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 \ *** Block No. 32, Hexblock 20 \ loop primitives 20Nov87 Code (do ( limit start -- ) H pop D pop Label >do L A mov E sub A L mov H A mov D sbb A H mov H push IP inx IP inx RP lhld H dcx IP M mov H dcx IP' M mov H dcx D M mov H dcx E M mov D pop H dcx D M mov H dcx E M mov RP shld Next end-code restrict Code (?do ( limit start -- ) H pop D pop H A mov D cmp >do jnz L A mov E cmp >do jnz >branch jmp end-code restrict \ *** Block No. 33, Hexblock 21 \ (loop (+loop 14May86 20Nov87 Code (loop RP lhld M inr 0= ?[ H inx M inr >next jz ]? Label doloop RP lhld 4 D lxi D dad M IP' mov H inx M IP mov Next end-code restrict Code (+loop RP lhld D pop M A mov E add A M mov H inx M A mov D adc A M mov rar D xra doloop jp Next end-code restrict \ *** Block No. 34, Hexblock 22 \ loop indices 06May86 20Nov87 Code I ( -- n ) RP lhld Label >I M E mov H inx M D mov D push H inx M E mov H inx M D mov H pop D dad hpush jmp end-code Code J ( -- n ) RP lhld 6 D lxi D dad >I jmp end-code \ *** Block No. 35, Hexblock 23 \ interpretive conditionals UH 25Jan88 | Create: remove>> r> rp! ; | : >>r ( addr len -- addr ) r> over rp@ under swap - dup rp! swap >r remove>> >r swap >r dup >r swap cmove r> ; | Variable saved-dp 0 saved-dp ! | Variable level 0 level ! | : +level ( -- ) level @ IF 1 level +! exit THEN state @ ?exit 1 level ! here saved-dp ! ] ; | : -level ( -- ) state @ 0= Abort" unstructured" level @ 0=exit -1 level +! level @ ?exit compile unnest [compile] [ saved-dp @ here over dp ! over - >>r >r ; \ *** Block No. 36, Hexblock 24 \ resolve loops and branches UH 25Jan88 : >mark ( -- addr ) here 0 , ; : +>mark ( acf -- addr ) +level , >mark ; : >resolve ( addr -- ) here over - swap ! -level ; : mark 1 ; immediate : THEN abs 1 ?pairs >resolve ; immediate : ELSE 1 ?pairs ['] branch +>mark swap >resolve -1 ; immediate : BEGIN mark -2 2swap ; immediate | : (reptil resolve REPEAT ; : REPEAT 2 ?pairs compile branch (reptil ; immediate : UNTIL 2 ?pairs compile ?branch (reptil ; immediate \ *** Block No. 39, Hexblock 27 \ Loops UH 25Jan88 : DO ['] (do +>mark 3 ; immediate : ?DO ['] (?do +>mark 3 ; immediate : LOOP 3 ?pairs compile (loop compile endloop >resolve ; immediate : +LOOP 3 ?pairs compile (+loop compile endloop >resolve ; immediate Code LEAVE RP lhld 4 D lxi D dad M E mov H inx M D mov H inx RP shld xchg H dcx M D mov H dcx M E mov D dad H IP mvx Next end-code restrict \ \\ Returnstack: calladr | index limit | adr of DO \ : LEAVE endloop r> 2- dup @ + >r ; restrict \ *** Block No. 40, Hexblock 28 \ um* 16May86 Label (um* 0 H lxi ( 0=Teil-Produkt ) 4 C mvi ( Schleifen-Zaehler ) [[ H dad ( Schiebe HL 24 bits nach links ) ral cs ?[ D dad 0 aci ]? H dad ral cs ?[ D dad 0 aci ]? C dcr 0= ?] ret Code um* ( u1 u2 -- ud ) D pop H pop B push H B mov L A mov (um* call H push A H mov B A mov H B mov (um* call D pop D C mov B dad 0 aci L D mov H L mov A H mov B pop dpush jmp end-code \ *** Block No. 41, Hexblock 29 \ m* * 2* 2/ 16May86 : 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 ; : * ( n1 n2 - prod ) um* drop ; Code 2* ( n -- 2*n ) H pop H dad hpush jmp end-code Code 2/ ( n -- n/2 ) H pop H A mov rlc rrc rar A H mov L A mov rar A L mov hpush jmp end-code \ \\ \ : 2* ( n -- 2*n ) 2 * ; \ : 2/ ( n -- n/2 ) 2 / ; \ *** Block No. 42, Hexblock 2a \ um/mod 14May86 Label usl0 A E mov H A mov C sub A H mov E A mov B sbb cs ?[ H A mov C add A H mov E A mov D dcr rz Label usla H dad ral usl0 jnc A E mov H A mov C sub A H mov E A mov B sbb ]? L inr D dcr usla jnz ret Label usbad -1 H lxi B pop H push hpush jmp Code um/mod ( d1 n1 -- rem quot ) IP H mvx B pop D pop xthl xchg L A mov C sub H A mov B sbb usbad jnc H A mov L H mov D L mov 8 D mvi D push usla call D pop H push E L mov usla call A D mov H E mov B pop C H mov B pop D push hpush jmp end-code \ *** Block No. 43, Hexblock 2b \ m/mod 16May86 : 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. 44, Hexblock 2c \ /mod / mod */mod */ u/mod ud/mod 16May86 : /mod ( n1 n2 -- rem quot ) >r extend r> m/mod ; : / ( n1 n2 -- quot ) /mod nip ; : mod ( n1 n2 -- rem ) /mod drop ; : */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> ; \ *** Block No. 45, Hexblock 2d \ cmove cmove> 16May86 18Nov87 Code cmove ( from to count -- ) IP H mvx IPsave shld B pop D pop H pop Label (cmove [[ B A mov C ora 0= not ?[[ M A mov H INX D stax D inx B dcx ]]? IPsave lhld H IP mvx Next end-code Code cmove> ( from to count -- ) IP H mvx IPsave shld B pop D pop H pop Label (cmove> B dad H dcx xchg B dad H dcx xchg [[ B A mov C ora 0= not ?[[ M A mov H dcx D stax D dcx B dcx ]]? IPsave lhld H IP mvx Next end-code \ *** Block No. 46, Hexblock 2e \ move place count 17Oct86 18Nov87 Code move ( from to quan -- ) IP H mvx Ipsave shld B pop D pop H pop Label domove (u< call (cmove jnc (cmove> jmp end-code | Code (place ( addr len to -- len to ) IP H mvx Ipsave shld D pop B pop H pop B push D push D inx domove jmp end-code : place ( addr len to -- ) (place c! ; Code count ( adr -- adr+1 len ) H pop M E mov 0 D mvi H inx H push D push Next end-code \ *** Block No. 47, Hexblock 2f \ fill erase 18Nov87 Code fill ( addr quan 8b -- ) IP H mvx IPsave shld D pop B pop H pop [[ B A mov C ora 0<> ?[[ E M mov H inx B dcx ]]? IPsave lhld H IP mvx 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 ; \ : count ( adr -- adr+1 len ) dup 1+ swap c@ ; \ : 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! ; \ *** Block No. 48, Hexblock 30 \ here allot , c, pad compile 11Jun86 18Nov87 Code here ( -- addr ) user' dp D lxi UP lhld D dad fetch jmp end-code Code allot ( n -- ) user' dp D lxi UP lhld D dad +store jmp end-code : , ( 16b -- ) here ! 2 allot ; : c, ( 8b -- ) here c! 1 allot ; : pad ( -- addr ) here $42 + ; : compile r> dup 2+ >r @ , ; restrict \ : here ( -- addr ) dp @ ; \ : allot ( n -- ) dp +! ; \ *** Block No. 49, Hexblock 31 \ input strings 11Jun86 $84 Constant /tib Variable #tib 0 #tib ! Variable >tib here >tib ! /tib allot Variable >in 0 >in ! Variable blk 0 blk ! Variable span 0 span ! : tib ( -- addr ) >tib @ ; : query ( -- ) tib $50 expect span @ #tib ! >in off blk off ; \ *** Block No. 50, Hexblock 32 \ \\ scan skip /string 16May86 18Nov87 \ \ : 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 ; \ \ : /string ( addr0 len0 +n - addr1 len1 ) \ over umin rot over + -rot - ; \ *** Block No. 51, Hexblock 33 \ skip scan 18Nov87 Label done H push B push IPsave lhld H IP mvx Next Code skip ( addr len del -- addr1 len1 ) IP H mvx IPsave shld D pop B pop H pop [[ B A mov C ora done jz M A mov E cmp done jnz H inx B dcx ]] end-code Code scan ( addr len chr -- addr1 len1 ) IP H mvx IPsave shld D pop B pop H pop [[ B A mov C ora done jz M A mov E cmp done jz H inx B dcx ]] end-code Code /string ( addr0 len0 +n - addr1 len1 ) H pop D pop D push (u< call cs ?[ xchg ]? H pop xthl D dad xthl L A mov E sub A L mov H A mov D sbb A H mov Hpush jmp end-code \ *** Block No. 52, Hexblock 34 \ capitalize ohne Umlaute !! 16May86UH 25Jan88 Variable caps 0 caps ! Label ?capital caps lda A ana rz Label (capital ( e --> A,E ) E A mov Ascii a cpi rc Ascii z 1+ cpi rnc Ascii a Ascii A - sui A E mov ret Code capital ( char -- char') D pop (capital call D push Next end-code Code upper ( addr len -- ) D pop E D mov H pop D inr [[ D dcr >next jz M E mov (capital call E M mov H inx ]] end-code \ \\ : capital ( char -- char') \ dup Ascii a [ Ascii z 1+ ] Literal uwithin not ?exit \ [ Ascii a Ascii A - ] Literal - ; \ : upper ( addr len -- ) bounds ?DO I c@ capital I c! LOOP ; \ *** Block No. 53, Hexblock 35 \ (word 16May86 Code (word ( char adr0 len0 -- addr ) IP H mvx IPsave shld B pop B dcx D pop >in lhld D dad xchg xthl xchg H push >in lhld C A mov L sub A L mov B A mov H sbb A H mov cs ?[ B inx C A mov >in sta B A mov >in 1+ sta D pop H pop D push ][ H inx H B mvx H pop [[ B A mov C ora 0<> ?[[ M A mov E cmp 0= ?[[ H inx B dcx ]]? ]? H push [[ B A mov C ora 0<> ?[[ M A mov E cmp 0<> ?[[ H inx B dcx ]]? ]? xchg H pop xthl E A mov L sub A L mov D A mov H sbb A H mov \ *** Block No. 54, Hexblock 36 \ (word Part2 16May86 B A mov C ora 0<> ?[ H inx ]? >in shld ]? H pop E A mov L sub A C mov D A mov H sbb A B mov H push user' dp D lxi UP lhld D dad M A mov H inx M H mov A L mov D pop H push C M mov H inx [[ B A mov C ora 0<> ?[[ D ldax A M mov H inx D inx B dcx ]]? bl M mvi IPsave lhld H IP mvx Next end-code \ \\ \ : (word ( char adr0 len0 -- addr ) \ rot >r 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. 55, Hexblock 37 \ source word parse name 20Oct86UH 25Jan88 Variable 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 dup count upper exit ; \ *** Block No. 56, Hexblock 38 \ state Ascii ," "lit (" " 18Nov87 Variable state 0 state ! : Ascii ( char -- n ) bl word 1+ c@ state @ IF [compile] Literal THEN ; immediate Code "lit RP lhld M E mov H inx M D mov H dcx D push D ldax D inx E add A M mov H inx D A mov 0 aci A M mov Next end-code : ," Ascii " parse here over 1+ allot place ; : (" "lit ; restrict : " compile (" ," align ; immediate restrict \ : "lit r> r> under count + even >r >r ; restrict \ *** Block No. 57, Hexblock 39 \ ." ( .( \ \\ hex decimal 07Oct87 : (." "lit count type ; restrict : ." compile (." ," align ; immediate restrict : ( ascii ) parse 2drop ; immediate : .( ascii ) parse type ; immediate : \ >in @ negate c/l mod >in +! ; immediate : \\ b/blk >in ! ; immediate : \needs name find nip 0=exit [compile] \ ; : hex $10 base ! ; : decimal $0A base ! ; \ *** Block No. 58, Hexblock 3a \ number conversion: digit? 16May86 18Nov87 Code digit? ( char -- n true : false ) user' base D lxi UP lhld D dad D pop E A mov Ascii 0 sui no jc $0A cpi cs not ?[ Ascii A Ascii 0 - cpi no jc Ascii A Ascii 9 - 1- sui ]? M cmp no jnc 0 H mvi A L mov H push yes jmp end-code \ \\ \ : digit? ( char -- digit true/ false ) dup Ascii 9 > \ IF [ Ascii A Ascii 9 - 1- ] Literal - dup Ascii 9 > and THEN \ Ascii 0 - dup base @ u< dup ?exit nip ; \ *** Block No. 59, Hexblock 3b \ number conversion: accumulate convert 11Jun86 | : end? ( -- flag ) >in @ 0= ; | : char ( addr0 -- addr1 char ) count -1 >in +! ; | : previous ( addr0 -- addr0 char ) 1- count ; : accumulate ( +d0 adr digit - +d1 adr ) swap >r swap base @ um* drop rot base @ um* d+ r> ; : convert ( +d1 addr0 -- +d2 addr2 ) 1+ BEGIN count digit? WHILE accumulate REPEAT 1- ; \ *** Block No. 60, Hexblock 3c \ number conversion: ?nonum punctuation? 07Oct87 | : ?nonum ( flag -- exit if true ) 0=exit rdrop 2drop drop rdrop false ; | : punctuation? ( char -- flag ) Ascii , over = swap Ascii . = or ; \ *** Block No. 61, Hexblock 3d \ number conversion: fixbase? 07Oct87 | : fixbase? ( char - char false / newbase true ) capital Ascii & case? IF $0A 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. 62, Hexblock 3e \ number conversion: ?num ?dpl 07Oct87 Variable dpl -1 dpl ! | : ?num ( flag -- exit if true ) 0=exit rdrop drop r> IF dnegate THEN rot drop dpl @ 1+ ?dup ?exit drop true ; | : ?dpl dpl @ -1 = ?exit 1 dpl +! ; \ *** Block No. 63, Hexblock 3f \ number conversion: number? number 11Jun86 : number? ( string - string false / n 0< / d 0> ) base push >in push dup count >in ! 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. 64, Hexblock 40 \ hide reveal immediate restrict 11Jun86 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. 65, Hexblock 41 \ clearstack hallot heap heap? 04Sep86 Code clearstack user' s0 D lxi UP lhld D dad M E mov H inx M D mov xchg sphl Next end-code : hallot ( quan -- ) s0 @ over - swap sp@ 2+ dup rot - dup s0 ! 2 pick over - di move clearstack ei 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. 66, Hexblock 42 \ Does> ; 11Jun86 20Nov87 Label (dodoes> IP rpush IP pop W inx W push Next end-code : (;code r> last @ name> ! ; : Does> compile (;code $CD ( 8080-Call ) c, compile (dodoes> ; immediate restrict \ *** Block No. 67, Hexblock 43 \ ?head | alignments 20Oct86 18Nov87 Variable ?head 0 ?head ! : | ?head @ ?exit -1 ?head ! ; \ machen nichts beim 8080: : even ( addr -- addr1 ) ; immediate : align ( -- ) ; immediate : halign ( -- ) ; immediate Variable warning 0 warning ! | : exists? warning @ ?exit last @ current @ (find nip 0=exit space last @ .name ." exists " ?cr ; \ *** Block No. 68, Hexblock 44 \ warning Create 20Oct86 18Nov87 Defer makeview ' 0 Is makeview : (create ( string -- ) align here swap count $1F and here 4+ place makeview , current @ @ , here last ! here c@ 1+ allot align exists? ?head @ IF 1 ?head +! dup , \ Pointer to Code halign heapmove $20 flag! dup dp ! THEN drop reveal 0 , ;Code W inx W push Next end-code : Create name count 1 $20 uwithin not Abort" invalid name" 1- (create ; \ *** Block No. 69, Hexblock 45 \ nfa? 30Jun86 Code nfa? ( thread cfa -- nfa / false ) D pop H pop [[ M A mov H inx M H mov A L mov H ora Hpush jz H push H inx H inx H push D push M A mov H inx $1F ani A E mov 0 D mvi D dad D pop xthl M A mov H pop $20 ani 0<> ?[ M A mov H inx M H mov A L mov ]? H A mov D cmp 0= ?[ L A mov E cmp ]? H pop 0= ?] H inx H inx Hpush jmp end-code \ \\ \ : nfa? ( thread cfa -- nfa / false) \ >r BEGIN @ dup 0= IF rdrop exit THEN dup 2+ name> r@ = \ UNTIL 2+ rdrop ; \ *** Block No. 70, Hexblock 46 \ >name name> >body .name 30Jun86 07Oct87 : >name ( cfa -- nfa / false ) voc-link BEGIN @ dup WHILE 2dup 4 - swap nfa? ?dup IF -rot 2drop exit THEN REPEAT nip ; Code (name> ( nfa -- cfa ) H pop M A mov H inx $1F ani A E mov 0 D mvi D dad hpush jmp end-code \ : (name> ( nfa -- cfa ) count $1F and + ; : name> ( nfa -- cfa ) dup (name> swap c@ $20 and IF @ THEN ; : >body ( cfa -- pfa ) 2+ ; : body> ( pfa -- cfa ) 2- ; : .name ( nfa -- ) ?dup IF dup heap? IF ." |" THEN count $1F and type ELSE ." ???" THEN space ; \ *** Block No. 71, Hexblock 47 \ : ; Constant Variable 07Nov87 : Create: Create hide current @ context ! 0 ] ; : : Create: ;Code IP rpush W inx W IP mvx Next end-code : ; 0 ?pairs compile unnest [compile] [ reveal ; immediate restrict : Constant ( n -- ) Create , ;Code W inx xchg M E mov H inx M D mov D push Next end-code : Variable Create 0 , ; \ *** Block No. 72, Hexblock 48 \ uallot User Alias Defer 11Jun86 18Nov87 : uallot ( quan -- offset ) even dup udp @ + $FF u> Abort" Userarea full" udp @ swap udp +! ; : User Create 2 uallot c, ;Code W inx W ldax A E mov 0 D mvi UP lhld D dad hpush jmp end-code : Alias ( cfa -- ) Create last @ dup c@ $20 and IF -2 allot ELSE $20 flag! THEN (name> ! ; | : crash true Abort" crash" ; : Defer Create ['] crash , ;Code W inx xchg M E mov H inx M D mov xchg >next1 jmp end-code \ *** Block No. 73, Hexblock 49 \ vp current context also toss 11Jun86 Create vp $10 allot Variable current : context ( -- adr ) vp dup @ + 2+ ; | : thru.vocstack ( -- from to ) vp 2+ context ; \ "Only Forth also Assembler" gives \ vp: countword = 6 | Only | Forth | Assembler | : also vp @ $0A > Error" Vocabulary stack full" context @ 2 vp +! context ! ; : toss vp @ IF -2 vp +! THEN ; \ *** Block No. 74, Hexblock 4a \ Vocabulary Forth Only Onlyforth 24Nov85 18Nov87 : Vocabulary Create 0 , 0 , here voc-link @ , voc-link ! Does> context ! ; \ | Name | Code | Thread | Coldthread | Voc-link | Vocabulary Forth Vocabulary Root : Only vp off Root also ; : Onlyforth Only Forth also definitions ; \ *** Block No. 75, Hexblock 4b \ definitions order words 10Oct87 20Nov87 | : init-vocabularys voc-link @ BEGIN dup 2- @ over 4- ! @ ?dup 0= UNTIL ; : definitions context @ current ! ; | : .voc ( adr -- ) @ 2- >name .name ; : order vp 4+ context 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. 76, Hexblock 4c \ found -text 11Jun86 | : 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 ; \ \\ \ : -text ( adr1 u adr2 -- false:gleich/+1:str1>str2/-1:str1r count $1F and strlen ! string ! \ BEGIN r> ?dup WHILE dup @ >r 2+ dup c@ $1F and strlen @ = \ IF dup 1+ strlen @ string @ -text 0= ?dup IF rdrop exit THEN \ THEN drop REPEAT string @ 1- false ; \ *** Block No. 77, Hexblock 4d \ (find 11Jun86 Code (find ( str thr - str false/ NFA true ) H pop D pop IP push D ldax $1F ani A C mov D inx Label findloop M A mov H inx M H mov A L mov H A mov L ora 0= ?[ IP pop D dcx D push no jmp ]? H push H inx H inx M A mov $1F ani C cmp 0<> ?[ H pop findloop jmp ]? D push H inx C B mov B inr [[ B dcr 0<> ?[[ D ldax M cmp 0<> ?[ D pop H pop findloop jmp ]? H inx D inx ]]? D pop H pop H inx H inx IP pop H push yes jmp end-code \ \\ HL: thread, nfa DE: string C: strlen B: counter \ *** Block No. 78, Hexblock 4e \ find ' [compile] ['] nullstring? 18Nov87 : 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 ?exit Error" ?" ; : [compile] ' , ; immediate restrict : ['] ' [compile] Literal ; immediate restrict : nullstring? ( string -- string false / true ) dup c@ 0= dup 0=exit nip ; \ *** Block No. 79, Hexblock 4f \ notfound 17Oct86UH 25Jan88 : no.extensions ( string -- ) state @ IF Abort" ?" THEN Error" ?" ; Defer notfound ' no.extensions Is notfound \ *** Block No. 80, Hexblock 50 \ interpret interpreter compiler parser UH 25Jan88 Defer parser : interpret ( -- ) BEGIN ?stack name nullstring? ?exit parser REPEAT ; | : interpreter ( str -- ) find ?dup IF 1 and IF execute exit THEN Error" compile only" THEN number? ?exit notfound ; ' interpreter Is parser | : compiler ( str -- ) find ?dup IF 0> IF execute exit THEN , exit THEN number? ?dup IF 0> IF swap [compile] Literal THEN [compile] Literal exit THEN notfound ; \ *** Block No. 81, Hexblock 51 \ [ ] UH 25Jan88 : [ ['] interpreter Is Parser state off ; immediate : ] ['] compiler Is Parser state on ; \ *** Block No. 82, Hexblock 52 \ Is 09May86UH 25Jan88 : (is r> dup 2+ >r @ ! ; | : def? ( cfa -- ) @ [ ' notfound @ ] Literal - Abort" not deferred" ; : Is ( adr -- ) ' dup def? >body state @ IF compile (is , exit THEN ! ; immediate \ *** Block No. 83, Hexblock 53 \ ?stack 30Jun86 | : 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 lhld user' dp D lxi D dad M E mov H inx M D mov 0 H lxi SP dad L A mov E sub H A mov D sbb 0= ?[ ;c: stackfull ; Assembler ]? H push UP lhld user' s0 D lxi D dad M E mov H inx M D mov H pop D A mov H cmp c0= ?[ 0= ?[ E A mov L cmp ]? ]? >next jnc ;c: true abort" Stack empty" ; \ \\ \ : ?stack sp@ here - 100 u< IF stackfull THEN \ sp@ s0 @ u> Abort" Stack empty" ;