Screen 0 not modified 0 \\ volksFORTH CP/M 2.2 rev. 3.80a 18Nov87 1 2 Entwicklung des volksFORTH-83 von 3 K. Schleisiek, B. Pennemann, 4 G. Rehfeld, D. Weineck, U. Hoffmann 5 6 Anpassung fuer Intel 8080 und CP/M 2.2 von U. Hoffmann 7 8 Dieses File enthaelt den kompletten Sourcetext des Kern-Systems 9 fuer die Intel 8080-CPU und die Anpassung an CP/M 2.2 und CP/M+. 10 Mit Hilfe eines Target-Compilers wird daraus das volksFORTH- 11 System erzeugt, daher finden sich an einigen Stellen Anweisungen 12 an den Target-Compiler, die fuer das Verstaendnis des Systems 13 nicht wichtig sind. 14 Version 3.80a enthaelt gegenueber 3.80 einige Aenderungen, ins- 15 besondere die Bdos-Schnittstelle fuer Disk-IO im Kern. Screen 1 not modified 0 \ CP/M 2.2 volksForth Load Screen 27Nov87 1 2 Onlyforth 3 $9000 displace ! 4 Target definitions $100 here! 5 6 7 1 $74 +thru \ Standard 8080-System 8 9 cr .( unresolved: ) .unresolved ( ' .blk is .status ) 10 11 save-target KERNEL.COM 12 13 14 15 Screen 2 not modified 0 \ FORTH Preamble and ID uho 19May2005 1 2 Assembler 3 4 nop 0 jmp here 2- >label >boot 5 nop 0 jmp here 2- >label >cold 6 nop 0 jmp here 2- >label >restart 7 8 here dup origin! 9 \ Hier beginnen die Kaltstartwerte der Benutzervariablen 10 11 6 rst 0 jmp end-code \ for multitasker 12 13 $100 allot 14 15 | Create logo ," volksFORTH-83 rev. 3.80a" Screen 3 not modified 0 \ Assembler Labels Next Forth-Register 29Jun86 1 2 Label dpush D push Label hpush H push 3 Label >next 4 IP ldax IP inx A L mov IP ldax IP inx A H mov 5 Label >next1 6 M E mov H inx M D mov xchg pchl 7 end-code 8 9 Variable RP 10 Variable UP 11 \ IP in BC 12 \ W in DE 13 \ SP in SP 14 Variable IPsave 15 Screen 4 not modified 0 \ Assembler Macros 20Oct86 1 Compiler Assembler also definitions Forth 2 : Next T >next jmp [ Forth ] ; 3 T hpush Forth Constant hpush T dpush Forth Constant dpush 4 T >next Forth Constant >next 5 6 : rpush ( reg -- ) RP lhld H dcx DUP M mov ( high ) 7 H dcx 1+ M mov ( low ) RP shld [ Forth ] ; 8 9 : rpop ( reg -- ) RP lhld M over 1+ mov ( low ) H inx 10 M swap mov ( high ) H inx RP shld [ Forth ] ; 11 \ rpush und rpop gehen nicht mit HL 12 13 : mvx ( src dest -- ) 14 2dup mov ( high ) 1+ swap 1+ swap mov ( low ) [ Forth ] ; 15 Target Screen 5 not modified 0 \ recover ;c: noop 20Oct86 1 2 Create recover Assembler 3 W pop IP rpush W IP mvx 4 Next end-code 5 6 Compiler Assembler also definitions Forth 7 8 : ;c: 0 T recover call end-code ] [ Forth ] ; 9 10 Target 11 12 | Code di di Next end-code 13 | Code ei ei Next end-code 14 15 Code noop >next here 2- ! end-code Screen 6 not modified 0 \ User variables 04Oct87 1 2 Constant origin 8 uallot drop \ Multitasker 3 \ Felder: entry link spare SPsave 4 \ Laenge kompatibel zum 68000 und 6502 volksFORTH 5 User s0 6 User r0 7 User dp 8 User offset 0 offset ! 9 User base $0A base ! 10 User output 11 User input 12 User errorhandler \ pointer for Abort" -code 13 User voc-link 14 User udp \ points to next free addr in User 15 Screen 7 not modified 0 \ manipulate system pointers 11Jun86 1 2 Code sp@ ( -- addr) 0 H lxi SP dad hpush jmp end-code 3 4 Code sp! ( addr --) H pop sphl Next end-code 5 6 7 Code up@ ( -- addr) UP lhld hpush jmp end-code 8 9 Code up! ( addr --) H pop UP shld Next end-code 10 11 12 13 14 15 Screen 8 not modified 0 \ manipulate returnstack 11Jun86 1 2 Code rp@ ( -- addr ) RP lhld hpush jmp end-code 3 4 Code rp! ( addr -- ) H pop RP shld Next end-code 5 6 7 Code >r ( 16b -- ) D pop D rpush Next end-code restrict 8 9 Code r> ( -- 16b ) D rpop D push Next end-code restrict 10 11 12 13 14 15 Screen 9 not modified 0 \ r@ rdrop exit unnest ?exit 07Oct87 1 Code r@ ( -- 16b ) 2 RP lhld M E mov H inx M D mov D push Next end-code 3 4 Code rdrop 5 RP lhld H inx H inx RP shld Next end-code restrict 6 7 Code exit Label >exit IP rpop Next end-code 8 Code unnest >exit here 2- ! 9 10 Code ?exit ( flag -- ) 11 H pop H A mov L ora >exit jnz Next end-code 12 13 Code 0=exit ( flag -- ) 14 H pop H A mov L ora >exit jz Next end-code 15 \ : ?exit ( flag -- ) IF rdrop THEN ; Screen 10 not modified 0 \ execute perform 11Jun86 18Nov87 1 2 Code execute ( cfa -- ) 3 H pop >Next1 jmp end-code 4 5 Code perform ( 'cfa -- ) 6 H pop M A mov H inx M H mov A L mov >Next1 jmp 7 end-code 8 9 10 \\ 11 : perform ( addr -- ) @ execute ; 12 13 14 15 Screen 11 not modified 0 \ c@ c! ctoggle 07Oct87 1 2 Code c@ ( addr -- 8b ) 3 H pop M L mov 0 H mvi hpush jmp end-code 4 5 Code c! ( 16b addr -- ) 6 H pop D pop E M mov Next end-code 7 8 Code flip ( 16b1 -- 16b2 ) 9 H pop H A mov L H mov A L mov Hpush jmp end-code 10 11 Code ctoggle ( 8b addr -- ) 12 H pop D pop M A mov E xra A M mov Next end-code 13 14 \\ 15 : ctoggle ( 8b addr --) under c@ xor swap c! ; Screen 12 not modified 0 \ @ ! 2@ 2! 11Jun86 18Nov87 1 2 Code @ ( addr -- 16b ) H pop Label fetch 3 M E mov H inx M D mov D push Next end-code 4 5 Code ! ( 16b addr -- ) 6 H pop D pop E M mov H inx D M mov Next end-code 7 8 Code 2@ ( addr -- 32b ) H pop H push 9 H inx H inx M E mov H inx M D mov H pop D push 10 M E mov H inx M D mov D push Next end-code 11 12 Code 2! ( 32b addr -- ) H pop 13 D pop E M mov H inx D M mov H inx 14 D pop E M mov H inx D M mov Next end-code 15 Screen 13 not modified 0 \ +! drop swap 11Jun86 18Nov87 1 2 Code +! ( 16b addr -- ) H pop 3 Label +store D pop 4 M A mov E add A M mov H inx 5 M A mov D adc A M mov Next end-code 6 7 \ : +! ( n addr -- ) under @ + swap ! ; 8 9 10 Code drop ( 16b -- ) H pop Next end-code 11 12 Code swap ( 16b1 16b2 -- 16b2 16b1 ) 13 H pop xthl hpush jmp end-code 14 15 Screen 14 not modified 0 \ dup ?dup 16May86 1 2 Code dup ( 16b -- 16b 16b ) 3 H pop H push hpush jmp end-code 4 5 Code ?dup ( 16b -- 16b 16b / false) 6 H pop H A mov L ora 0<> ?[ H push ]? 7 hpush jmp end-code 8 9 \\ 10 : ?dup ( 16b -- 16b 16b / false) dup IF dup THEN ; 11 12 : dup ( 16b -- 16b 16b ) sp@ @ ; 13 14 15 Screen 15 not modified 0 \ over rot nip under 11Jun86 1 2 Code over ( 16b1 16b2 - 16b1 16b2 16b1 ) 3 D pop H pop H push dpush jmp end-code 4 Code rot ( 16b1 16b2 16b3 - 16b2 16b3 16b1 ) 5 D pop H pop xthl dpush jmp end-code 6 Code nip ( 16b1 16b2 -- 16b2) 7 H pop D pop hpush jmp end-code 8 Code under ( 16b1 16b2 -- 16b2 16b1 16b2) 9 H pop D pop H push dpush jmp end-code 10 11 \\ 12 : over >r swap r> swap ; 13 : rot >r dup r> swap ; 14 : nip swap drop ; 15 : under swap over ; Screen 16 not modified 0 \ -rot pick roll -roll 11Jun86 1 Code -rot ( 16b1 16b2 16b3 -- 16b3 16b1 16b2 ) 2 H pop D pop xthl H push D push Next end-code 3 4 Code pick ( n -- 16b.n ) 5 H pop H dad SP dad 6 M E mov H inx M D mov D push Next end-code 7 8 : roll ( n -- ) 9 dup >r pick sp@ dup 2+ r> 1+ 2* cmove> drop ; 10 11 : -roll ( n -- ) >r dup sp@ dup 2+ 12 dup 2+ swap r@ 2* cmove r> 1+ 2* + ! ; 13 \\ 14 : -rot ( 16b1 16b2 16b3 -- 16b3 16b1 16b2 ) rot rot ; 15 : pick ( n -- 16b.n ) 1+ 2* sp@ + @ ; Screen 17 not modified 0 \ double word stack manipulation 09May86 1 Code 2swap ( 32b1 32b2 -- 32b2 32b1) 2 H pop D pop xthl H push 3 5 H lxi SP dad M A mov D M mov A D mov 4 H dcx M A mov E M mov A E mov H pop dpush jmp 5 end-code 6 7 Code 2drop ( 32b -- ) H pop H pop Next end-code 8 9 Code 2dup ( 32b -- 32b 32b) 10 H pop D pop D push H push dpush jmp end-code 11 12 \\ 13 : 2swap ( 32b1 32b2 -- 32b2 32b1) rot >r rot r> ; 14 : 2drop ( 32b -- ) drop drop ; 15 : 2dup ( 32b -- 32b 32b) over over ; Screen 18 not modified 0 \ + and or xor not 09May86 1 Code + ( n1 n2 -- n3 ) 2 H pop D pop D dad hpush jmp end-code 3 Code or ( 16b1 16b2 -- 16b3 ) 4 H pop D pop H A mov D ora A H mov 5 L A mov E ora A L mov hpush jmp end-code 6 Code and ( 16b1 16b2 -- 16b3 ) 7 H pop D pop H A mov D ana A H mov 8 L A mov E ana A L mov hpush jmp end-code 9 Code xor ( 16b1 16b2 -- 16b3 ) 10 H pop D pop H A mov D xra A H mov 11 L A mov E xra A L mov hpush jmp end-code 12 Code not ( 16b1 -- 16b2 ) H pop Label >not 13 H A mov cma A H mov L A mov cma A L mov 14 hpush jmp end-code 15 Screen 19 not modified 0 \ - negate 16May86 1 2 Code - ( n1 n2 -- n3 ) 3 D pop H pop 4 L A mov E sub A L mov 5 H A mov D sbb A H mov hpush jmp end-code 6 7 Code negate ( n1 -- n2 ) 8 H pop H dcx >not jmp end-code 9 10 \\ 11 : - ( n1 n2 -- n3 ) negate + ; 12 13 14 15 Screen 20 not modified 0 \ dnegate d+ 10Mar86 18Nov87 1 2 Code dnegate ( d1 -- -d1 ) H pop 3 Label >dnegate 4 D pop A sub E sub A E mov 0 A mvi D sbb 5 A D mov 0 A mvi L sbb A L mov 0 A mvi H sbb 6 A H mov dpush jmp end-code 7 8 Code d+ ( d1 d2 -- d3) 9 6 H lxi SP dad M E mov C M mov H inx 10 M D mov B M mov B pop H pop D dad xchg 11 H pop L A mov C adc A L mov H A mov B adc 12 A H mov B pop dpush jmp end-code 13 14 15 Screen 21 not modified 0 \ 1+ 2+ 3+ 4+ 6+ 1- 2- 4- 27Apr86 1 Code 1+ ( n1 -- n2 ) H pop H inx hpush jmp end-code 2 Code 2+ ( n1 -- n2 ) 3 H pop H inx H inx hpush jmp end-code 4 Code 3+ ( n1 -- n2 ) 5 H pop H inx H inx H inx hpush jmp end-code 6 Code 4+ ( n1 -- n2 ) 7 H pop 4 D lxi D dad hpush jmp end-code 8 | Code 6+ ( n1 -- n2 ) 9 H pop 6 D lxi D dad hpush jmp end-code 10 Code 1- ( n1 -- n2 ) H pop H dcx hpush jmp end-code 11 Code 2- ( n1 -- n2 ) 12 H pop H dcx H dcx hpush jmp end-code 13 Code 4- ( n1 -- n2 ) 14 H pop -4 D lxi D dad hpush jmp end-code 15 Screen 22 not modified 0 \ number Constants 07Oct87 1 -1 Constant true 0 Constant false 2 3 0 ( -- 0 ) Constant 0 4 1 ( -- 1 ) Constant 1 5 2 ( -- 2 ) Constant 2 6 3 ( -- 3 ) Constant 3 7 4 ( -- 4 ) Constant 4 8 -1 ( -- -1 ) Constant -1 9 10 Code on ( addr -- ) H pop $FF A mvi 11 Label set A M mov H inx A M mov Next 12 Code off ( addr -- ) H pop A xra set jmp end-code 13 14 \ : on ( addr -- ) true swap ! ; 15 \ : off ( addr -- ) false swap ! ; Screen 23 not modified 0 \ words for number literals 16May86 1 2 Code lit ( -- 16b ) 3 IP ldax A L mov IP inx IP ldax A H mov IP inx 4 hpush jmp end-code 5 6 Code clit ( -- 8b ) 7 IP ldax A L mov 0 H mvi IP inx hpush jmp 8 end-code 9 10 : Literal ( 16b -- ) 11 dup $FF00 and IF compile lit , exit THEN 12 compile clit c, ; immediate restrict 13 14 15 Screen 24 not modified 0 \ comparision words 18Nov87 1 Label (u< ( HL,DE -> HL u< DE c,z ) 2 H A mov D cmp rnz L A mov E cmp ret 3 Label (< ( HL,DE -> HL < DE c,z ) 4 H A mov D xra (u< jp D A mov H cmp ret 5 6 Label yes true H lxi hpush jmp 7 Code u< ( u1 u2 -- flag ) D pop H pop 8 Label uless (u< call yes jc 9 Label no false H lxi hpush jmp 10 11 Code < ( n1 n2 -- flag ) D pop H pop 12 Label less (< call yes jc no jmp end-code 13 14 Code u> ( u1 u2 -- flag ) H pop D pop uless jmp end-code 15 Code > ( n1 n2 -- flag ) H pop D pop less jmp end-code Screen 25 not modified 0 \ comparision words 18Nov87 1 Code 0< ( n1 n2 -- flag ) H pop 2 Label negative H dad yes jc no jmp end-code 3 4 Code 0> ( n -- flag ) H pop H A mov A ora no jm 5 L ora yes jnz no jmp end-code 6 7 Code 0= ( n -- flag ) H pop 8 Label zero= H A mov L ora yes jz no jmp end-code 9 10 Code 0<> ( n -- flag ) 11 H pop H A mov L ora yes jnz no jmp end-code 12 13 Code = ( n1 n2 -- flag ) H pop D pop 14 L A mov E cmp no jnz 15 H A mov D cmp no jnz yes jmp end-code Screen 26 not modified 0 \\ comparision words high level 18Nov87 1 : 0< ( n1 -- flag ) 8000 and 0<> ; 2 : > ( n1 n2 -- flag ) swap < ; 3 : 0> ( n -- flag ) negate 0< ; 4 : 0<> ( n -- flag ) 0= not ; 5 : u> ( u1 u2 -- flag ) swap u< ; 6 : = ( n1 n2 -- flag ) - 0= ; 7 : uwithin ( u1 [low up[ -- flag ) over - -rot - u> ; 8 | : minimax ( n1 n2 flag -- n3 ) rdrop IF swap THEN drop ; 9 : min ( n1 n2 -- n3 ) 2dup > minimax ; 10 : max ( n1 n2 -- n3 ) 2dup < minimax ; 11 : umax ( u1 u2 -- u3 ) 2dup u< minimax ; 12 : umin ( u1 u2 -- u3 ) 2dup u> minimax ; 13 : extend ( n -- d ) dup 0< ; 14 : dabs ( d -- ud ) extend IF dnegate THEN ; 15 : abs ( n -- u) extend IF negate THEN ; Screen 27 not modified 0 \ uwthin double number comparison words 18Nov87 1 2 Code uwithin ( u1 [low up[ -- flag ) H pop D pop xthl 3 (u< call cs ?[ H pop no jmp ]? 4 D pop (u< call yes jc no jmp end-code 5 6 Code d0= ( d -- flag ) H pop 7 H A mov L ora H pop no jnz zero= jmp end-code 8 9 : d= ( d1 d2 -- flag ) rot = -rot = and ; 10 : d< ( d1 d2 -- flag ) 11 rot 2dup = IF 2drop u< exit THEN > nip nip ; 12 13 14 \\ 15 : d0= ( d -- flag ) or 0= ; Screen 28 not modified 0 \ minimum maximum 18Nov87 1 2 Code umax ( u1 u2 -- u3 ) 3 H pop D pop (u< call 4 Label minimax cs ?[ xchg ]? hpush jmp end-code 5 6 Code umin ( u1 u2 -- u3 ) 7 H pop D pop (u< call cmc minimax jmp end-code 8 9 Code max ( n1 n2 -- n3 ) 10 H pop D pop (< call minimax jmp end-code 11 12 Code min ( n1 n2 -- n3 ) 13 H pop D pop (< call cmc minimax jmp end-code 14 15 Screen 29 not modified 0 \ sign extension absolute values 18Nov87 1 2 Code extend ( n -- d ) H pop H push negative jmp end-code 3 4 Code abs ( a -- u ) H pop H A mov A ora 5 hpush jp H dcx >not jmp end-code 6 7 Code dabs ( d -- ud ) H pop H A mov A ora 8 hpush jp >dnegate jmp end-code 9 10 11 12 13 14 15 Screen 30 not modified 0 \ branch ?branch 20Nov87 1 2 Code branch ( -- ) Label >branch 3 IP H mvx M E mov H inx M D mov H dcx 4 D dad H IP mvx Next end-code 5 6 Code ?branch ( fl -- ) 7 H pop H A mov L ora >branch jz 8 IP inx IP inx Next end-code 9 10 11 \\ 12 : branch r> dup @ + >r ; 13 14 15 Screen 31 not modified 0 \ loop primitives 11Jun86 20Nov87 1 2 Code bounds ( start count -- limit start ) 3 H pop D pop D dad H push D push Next end-code 4 5 Code endloop 6 RP lhld 6 D lxi D dad RP shld next end-code restrict 7 8 \\ dodo puts "index | limit | adr.of.DO" on return-stack 9 : bounds ( start count -- limit start ) over + swap ; 10 11 | : dodo rdrop r> 2+ dup >r rot >r swap >r >r ; 12 13 : (do ( limit start -- ) over - dodo ; restrict 14 : (?do ( limit start -- ) over - ?dup IF dodo THEN 15 r> dup @ + >r drop ; restrict Screen 32 not modified 0 \ loop primitives 20Nov87 1 2 Code (do ( limit start -- ) H pop D pop 3 Label >do 4 L A mov E sub A L mov 5 H A mov D sbb A H mov 6 H push IP inx IP inx 7 RP lhld H dcx IP M mov H dcx IP' M mov 8 H dcx D M mov H dcx E M mov 9 D pop H dcx D M mov H dcx E M mov RP shld 10 Next end-code restrict 11 12 Code (?do ( limit start -- ) H pop D pop 13 H A mov D cmp >do jnz 14 L A mov E cmp >do jnz >branch jmp 15 end-code restrict Screen 33 not modified 0 \ (loop (+loop 14May86 20Nov87 1 2 Code (loop 3 RP lhld M inr 0= ?[ H inx M inr >next jz ]? 4 Label doloop RP lhld 4 D lxi D dad 5 M IP' mov H inx M IP mov Next 6 end-code restrict 7 8 Code (+loop 9 RP lhld D pop 10 M A mov E add A M mov H inx 11 M A mov D adc A M mov 12 rar D xra doloop jp Next 13 end-code restrict 14 15 Screen 34 not modified 0 \ loop indices 06May86 20Nov87 1 2 Code I ( -- n ) 3 RP lhld 4 Label >I M E mov H inx M D mov D push 5 H inx M E mov H inx M D mov H pop D dad 6 hpush jmp 7 end-code 8 9 Code J ( -- n ) 10 RP lhld 6 D lxi D dad >I jmp end-code 11 12 13 14 15 Screen 35 not modified 0 \ interpretive conditionals UH 25Jan88 1 2 | Create: remove>> r> rp! ; 3 | : >>r ( addr len -- addr ) r> over rp@ under swap - dup rp! 4 swap >r remove>> >r swap >r dup >r swap cmove r> ; 5 6 | Variable saved-dp 0 saved-dp ! 7 8 | Variable level 0 level ! 9 10 | : +level ( -- ) level @ IF 1 level +! exit THEN state @ ?exit 11 1 level ! here saved-dp ! ] ; 12 13 | : -level ( -- ) state @ 0= Abort" unstructured" 14 level @ 0=exit -1 level +! level @ ?exit compile unnest 15 [compile] [ saved-dp @ here over dp ! over - >>r >r ; Screen 36 not modified 0 \ resolve loops and branches UH 25Jan88 1 2 : >mark ( -- addr ) here 0 , ; 3 4 : +>mark ( acf -- addr ) +level , >mark ; 5 6 : >resolve ( addr -- ) here over - swap ! -level ; 7 8 : mark 1 ; immediate 3 : THEN abs 1 ?pairs >resolve ; immediate 4 : ELSE 1 ?pairs ['] branch +>mark swap 5 >resolve -1 ; immediate 6 : BEGIN mark 8 -2 2swap ; immediate 9 10 | : (reptil resolve REPEAT ; 12 13 : REPEAT 2 ?pairs compile branch (reptil ; immediate 14 : UNTIL 2 ?pairs compile ?branch (reptil ; immediate 15 Screen 39 not modified 0 \ Loops UH 25Jan88 1 2 : DO ['] (do +>mark 3 ; immediate 3 : ?DO ['] (?do +>mark 3 ; immediate 4 : LOOP 3 ?pairs compile (loop compile endloop >resolve ; 5 immediate 6 : +LOOP 3 ?pairs compile (+loop compile endloop >resolve ; 7 immediate 8 9 Code LEAVE 10 RP lhld 4 D lxi D dad M E mov H inx M D mov 11 H inx RP shld xchg H dcx M D mov H dcx M E mov 12 D dad H IP mvx Next end-code restrict 13 14 \\ Returnstack: calladr | index limit | adr of DO 15 : LEAVE endloop r> 2- dup @ + >r ; restrict Screen 40 not modified 0 \ um* 16May86 1 Label (um* 0 H lxi ( 0=Teil-Produkt ) 2 4 C mvi ( Schleifen-Zaehler ) 3 [[ H dad ( Schiebe HL 24 bits nach links ) 4 ral cs ?[ D dad 0 aci ]? 5 H dad ral cs ?[ D dad 0 aci ]? 6 C dcr 0= ?] ret 7 8 Code um* ( u1 u2 -- ud ) 9 D pop H pop B push H B mov L A mov (um* call 10 H push A H mov B A mov H B mov (um* call 11 D pop D C mov B dad 0 aci L D mov H L mov 12 A H mov B pop dpush jmp end-code 13 14 15 Screen 41 not modified 0 \ m* * 2* 2/ 16May86 1 2 : m* ( n1 n2 -- d ) dup 0< dup >r IF negate THEN 3 swap dup 0< IF negate r> not >r THEN 4 um* r> IF dnegate THEN ; 5 6 : * ( n1 n2 - prod ) um* drop ; 7 8 Code 2* ( n -- 2*n ) H pop H dad hpush jmp end-code 9 10 Code 2/ ( n -- n/2 ) 11 H pop H A mov rlc rrc rar A H mov 12 L A mov rar A L mov hpush jmp end-code 13 \\ 14 : 2* ( n -- 2*n ) 2 * ; 15 : 2/ ( n -- n/2 ) 2 / ; Screen 42 not modified 0 \ um/mod 14May86 1 Label usl0 2 A E mov H A mov C sub A H mov E A mov B sbb 3 cs ?[ H A mov C add A H mov E A mov D dcr rz 4 Label usla 5 H dad ral usl0 jnc 6 A E mov H A mov C sub A H mov E A mov B sbb 7 ]? L inr D dcr usla jnz ret 8 Label usbad -1 H lxi B pop H push hpush jmp 9 Code um/mod ( d1 n1 -- rem quot ) 10 IP H mvx B pop D pop xthl xchg 11 L A mov C sub H A mov B sbb usbad jnc 12 H A mov L H mov D L mov 8 D mvi D push 13 usla call D pop H push E L mov usla call 14 A D mov H E mov B pop C H mov B pop 15 D push hpush jmp end-code Screen 43 not modified 0 \ m/mod 16May86 1 2 : m/mod ( d n -- mod quot) 3 dup >r abs over 0< IF under + swap THEN 4 um/mod r@ 0< IF negate over IF swap r@ + swap 1- 5 THEN THEN rdrop ; 6 7 8 9 10 11 12 13 14 15 Screen 44 not modified 0 \ /mod / mod */mod */ u/mod ud/mod 16May86 1 2 : /mod ( n1 n2 -- rem quot ) >r extend r> m/mod ; 3 4 : / ( n1 n2 -- quot ) /mod nip ; 5 6 : mod ( n1 n2 -- rem ) /mod drop ; 7 8 : */mod ( n1 n2 n3 -- rem quot ) >r m* r> m/mod ; 9 10 : */ ( n1 n2 n3 -- quot ) */mod nip ; 11 12 : u/mod ( u1 u2 -- urem uquot ) 0 swap um/mod ; 13 14 : ud/mod ( ud1 u2 -- urem udquot ) >r 0 r@ um/mod r> swap >r 15 um/mod r> ; Screen 45 not modified 0 \ cmove cmove> 16May86 18Nov87 1 2 Code cmove ( from to count -- ) IP H mvx IPsave shld 3 B pop D pop H pop 4 Label (cmove 5 [[ B A mov C ora 0= not ?[[ 6 M A mov H INX D stax D inx B dcx 7 ]]? IPsave lhld H IP mvx Next end-code 8 9 Code cmove> ( from to count -- ) IP H mvx IPsave shld 10 B pop D pop H pop 11 Label (cmove> 12 B dad H dcx xchg B dad H dcx xchg 13 [[ B A mov C ora 0= not ?[[ 14 M A mov H dcx D stax D dcx B dcx 15 ]]? IPsave lhld H IP mvx Next end-code Screen 46 not modified 0 \ move place count 17Oct86 18Nov87 1 2 Code move ( from to quan -- ) 3 IP H mvx Ipsave shld B pop D pop H pop 4 Label domove (u< call (cmove jnc (cmove> jmp end-code 5 6 | Code (place ( addr len to -- len to ) IP H mvx Ipsave shld 7 D pop B pop H pop 8 B push D push D inx domove jmp end-code 9 10 : place ( addr len to -- ) (place c! ; 11 12 Code count ( adr -- adr+1 len ) H pop M E mov 0 D mvi 13 H inx H push D push Next end-code 14 15 Screen 47 not modified 0 \ fill erase 18Nov87 1 2 Code fill ( addr quan 8b -- ) 3 IP H mvx IPsave shld D pop B pop H pop 4 [[ B A mov C ora 0<> ?[[ 5 E M mov H inx B dcx 6 ]]? IPsave lhld H IP mvx Next end-code 7 8 : erase ( addr quan --) 0 fill ; 9 10 \\ : fill ( addr quan 8b -- ) 11 swap ?dup IF >r over c! dup 1+ r> 1- cmove exit THEN 2drop ; 12 : count ( adr -- adr+1 len ) dup 1+ swap c@ ; 13 : move ( from to quan -- ) 14 >r 2dup u< IF r> cmove> exit THEN r> cmove ; 15 : place ( addr len to --) over >r rot over 1+ r> move c! ; Screen 48 not modified 0 \ here allot , c, pad compile 11Jun86 18Nov87 1 2 Code here ( -- addr ) user' dp D lxi 3 UP lhld D dad fetch jmp end-code 4 5 Code allot ( n -- ) user' dp D lxi 6 UP lhld D dad +store jmp end-code 7 8 : , ( 16b -- ) here ! 2 allot ; 9 : c, ( 8b -- ) here c! 1 allot ; 10 11 : pad ( -- addr ) here $42 + ; 12 : compile r> dup 2+ >r @ , ; restrict 13 14 \ : here ( -- addr ) dp @ ; 15 \ : allot ( n -- ) dp +! ; Screen 49 not modified 0 \ input strings 11Jun86 1 2 Variable #tib 0 #tib ! 3 Variable >tib here >tib ! $50 allot 4 Variable >in 0 >in ! 5 Variable blk 0 blk ! 6 Variable span 0 span ! 7 8 : tib ( -- addr ) >tib @ ; 9 10 : query ( -- ) tib $50 expect span @ #tib ! >in off blk off ; 11 12 13 14 15 Screen 50 not modified 0 \\ scan skip /string 16May86 18Nov87 1 2 : scan ( addr0 len0 char -- addr1 len1 ) >r 3 BEGIN dup WHILE over c@ r@ - WHILE 1- swap 1+ swap REPEAT 4 rdrop ; 5 6 : skip ( addr len del -- addr1 len1 ) >r 7 BEGIN dup WHILE over c@ r@ = WHILE 1- swap 1+ swap REPEAT 8 rdrop ; 9 10 : /string ( addr0 len0 +n - addr1 len1 ) 11 over umin rot over + -rot - ; 12 13 14 15 Screen 51 not modified 0 \ skip scan 18Nov87 1 Label done H push B push IPsave lhld H IP mvx Next 2 Code skip ( addr len del -- addr1 len1 ) 3 IP H mvx IPsave shld D pop B pop H pop 4 [[ B A mov C ora done jz 5 M A mov E cmp done jnz H inx B dcx ]] end-code 6 7 Code scan ( addr len chr -- addr1 len1 ) 8 IP H mvx IPsave shld D pop B pop H pop 9 [[ B A mov C ora done jz 10 M A mov E cmp done jz H inx B dcx ]] end-code 11 12 Code /string ( addr0 len0 +n - addr1 len1 ) H pop D pop 13 D push (u< call cs ?[ xchg ]? H pop xthl D dad xthl 14 L A mov E sub A L mov H A mov D sbb A H mov 15 Hpush jmp end-code Screen 52 not modified 0 \ capitalize ohne Umlaute !! 16May86UH 25Jan88 1 Variable caps 0 caps ! 2 Label ?capital caps lda A ana rz 3 Label (capital ( e --> A,E ) E A mov Ascii a cpi rc 4 Ascii z 1+ cpi rnc Ascii a Ascii A - sui A E mov ret 5 6 Code capital ( char -- char') D pop 7 (capital call D push Next end-code 8 Code upper ( addr len -- ) D pop E D mov H pop D inr 9 [[ D dcr >next jz M E mov (capital call E M mov H inx ]] 10 end-code 11 12 \\ : capital ( char -- char') 13 dup Ascii a [ Ascii z 1+ ] Literal uwithin not ?exit 14 [ Ascii a Ascii A - ] Literal - ; 15 : upper ( addr len -- ) bounds ?DO I c@ capital I c! LOOP ; Screen 53 not modified 0 \ (word 16May86 1 2 Code (word ( char adr0 len0 -- addr ) 3 IP H mvx IPsave shld B pop B dcx D pop 4 >in lhld D dad xchg xthl xchg H push >in lhld 5 C A mov L sub A L mov B A mov H sbb A H mov 6 cs ?[ B inx C A mov >in sta B A mov >in 1+ sta 7 D pop H pop D push 8 ][ H inx H B mvx H pop 9 [[ B A mov C ora 0<> 10 ?[[ M A mov E cmp 0= ?[[ H inx B dcx ]]? ]? 11 H push 12 [[ B A mov C ora 0<> 13 ?[[ M A mov E cmp 0<> ?[[ H inx B dcx ]]? ]? 14 xchg H pop xthl 15 E A mov L sub A L mov D A mov H sbb A H mov Screen 54 not modified 0 \ (word Part2 16May86 1 2 B A mov C ora 0<> ?[ H inx ]? >in shld ]? 3 H pop E A mov L sub A C mov D A mov H sbb A B mov 4 H push user' dp D lxi UP lhld D dad 5 M A mov H inx M H mov A L mov D pop H push 6 C M mov H inx 7 [[ B A mov C ora 0<> 8 ?[[ D ldax A M mov H inx D inx B dcx ]]? bl M mvi 9 IPsave lhld H IP mvx Next end-code 10 \\ 11 : (word ( char adr0 len0 -- addr ) 12 rot >r over swap >in @ /string 13 r@ skip over swap r> scan >r rot over swap - r> 0<> - 14 >in ! over - here dup >r place bl r@ count + c! r> ; 15 Screen 55 not modified 0 \ source word parse name 20Oct86UH 25Jan88 1 2 Variable loadfile 3 4 : source ( -- addr len ) blk @ ?dup 5 IF loadfile @ (block b/blk exit THEN tib #tib @ ; 6 7 : word ( char -- addr ) source (word ; 8 9 : parse ( char -- addr len ) 10 >r source >in @ /string over swap r> scan >r 11 over - dup r> 0<> - >in +! ; 12 13 : name ( -- addr ) bl word dup count upper exit ; 14 15 Screen 56 not modified 0 \ state Ascii ," "lit (" " 18Nov87 1 2 Variable state 0 state ! 3 4 : Ascii ( char -- n ) 5 bl word 1+ c@ state @ IF [compile] Literal THEN ; immediate 6 7 Code "lit RP lhld M E mov H inx M D mov H dcx 8 D push D ldax D inx E add A M mov H inx 9 D A mov 0 aci A M mov Next end-code 10 11 : ," Ascii " parse here over 1+ allot place ; 12 : (" "lit ; restrict 13 : " compile (" ," align ; immediate restrict 14 15 \ : "lit r> r> under count + even >r >r ; restrict Screen 57 not modified 0 \ ." ( .( \ \\ hex decimal 07Oct87 1 2 : (." "lit count type ; restrict 3 : ." compile (." ," align ; immediate restrict 4 5 : ( ascii ) parse 2drop ; immediate 6 : .( ascii ) parse type ; immediate 7 8 : \ >in @ negate c/l mod >in +! ; immediate 9 : \\ b/blk >in ! ; immediate 10 : \needs name find nip 0=exit [compile] \ ; 11 12 : hex $10 base ! ; 13 : decimal $0A base ! ; 14 15 Screen 58 not modified 0 \ number conversion: digit? 16May86 18Nov87 1 2 Code digit? ( char -- n true : false ) 3 user' base D lxi UP lhld D dad 4 D pop E A mov Ascii 0 sui no jc 5 $0A cpi cs not ?[ Ascii A Ascii 0 - cpi no jc 6 Ascii A Ascii 9 - 1- sui ]? 7 M cmp no jnc 8 0 H mvi A L mov H push yes jmp end-code 9 10 \\ 11 : digit? ( char -- digit true/ false ) dup Ascii 9 > 12 IF [ Ascii A Ascii 9 - 1- ] Literal - dup Ascii 9 > and THEN 13 Ascii 0 - dup base @ u< dup ?exit nip ; 14 15 Screen 59 not modified 0 \ number conversion: accumulate convert 11Jun86 1 2 | : end? ( -- flag ) >in @ 0= ; 3 | : char ( addr0 -- addr1 char ) count -1 >in +! ; 4 | : previous ( addr0 -- addr0 char ) 1- count ; 5 6 : accumulate ( +d0 adr digit - +d1 adr ) 7 swap >r swap base @ um* drop rot base @ um* d+ r> ; 8 9 : convert ( +d1 addr0 -- +d2 addr2 ) 10 1+ BEGIN count digit? WHILE accumulate REPEAT 1- ; 11 12 13 14 15 Screen 60 not modified 0 \ number conversion: ?nonum punctuation? 07Oct87 1 2 | : ?nonum ( flag -- exit if true ) 0=exit 3 rdrop 2drop drop rdrop false ; 4 5 | : punctuation? ( char -- flag ) 6 Ascii , over = swap Ascii . = or ; 7 8 9 10 11 12 13 14 15 Screen 61 not modified 0 \ number conversion: fixbase? 07Oct87 1 2 | : fixbase? ( char - char false / newbase true ) capital 3 Ascii & case? IF $0A true exit THEN 4 Ascii $ case? IF $10 true exit THEN 5 Ascii H case? IF $10 true exit THEN 6 Ascii % case? IF 2 true exit THEN false ; 7 8 9 10 11 12 13 14 15 Screen 62 not modified 0 \ number conversion: ?num ?dpl 07Oct87 1 2 Variable dpl -1 dpl ! 3 4 | : ?num ( flag -- exit if true ) 0=exit 5 rdrop drop r> IF dnegate THEN 6 rot drop dpl @ 1+ ?dup ?exit drop true ; 7 8 | : ?dpl dpl @ -1 = ?exit 1 dpl +! ; 9 10 11 12 13 14 15 Screen 63 not modified 0 \ number conversion: number? number 11Jun86 1 2 : number? ( string - string false / n 0< / d 0> ) 3 base push >in push dup count >in ! dpl on 4 0 >r ( +sign) 0.0 rot end? ?nonum char 5 Ascii - case? IF rdrop true >r end? ?nonum char THEN 6 fixbase? IF base ! end? ?nonum char THEN 7 BEGIN digit? 0= ?nonum 8 BEGIN accumulate ?dpl end? ?num char digit? 0= UNTIL 9 previous punctuation? 0= ?nonum dpl off end? ?num char 10 REPEAT ; 11 12 : number ( string -- d ) 13 number? ?dup 0= Abort" ?" 0< IF extend THEN ; 14 15 Screen 64 not modified 0 \ hide reveal immediate restrict 11Jun86 1 2 Variable last 0 last ! 3 | : last? ( -- false / acf true) last @ ?dup ; 4 : hide last? IF 2- @ current @ ! THEN ; 5 : reveal last? IF 2- current @ ! THEN ; 6 : Recursive reveal ; immediate restrict 7 8 | : flag! ( 8b --) 9 last? IF under c@ or over c! THEN drop ; 10 11 : immediate $40 flag! ; 12 : restrict $80 flag! ; 13 14 15 Screen 65 not modified 0 \ clearstack hallot heap heap? 04Sep86 1 2 Code clearstack 3 user' s0 D lxi UP lhld D dad M E mov H inx M D mov 4 xchg sphl Next end-code 5 6 : hallot ( quan -- ) 7 s0 @ over - swap sp@ 2+ dup rot - dup s0 ! 8 2 pick over - di move clearstack ei s0 ! ; 9 10 : heap ( -- addr ) s0 @ 6 + ; 11 : heap? ( addr -- flag ) heap up@ uwithin ; 12 13 | : heapmove ( from -- from ) 14 dup here over - dup hallot 15 heap swap cmove heap over - last +! reveal ; Screen 66 not modified 0 \ Does> ; 11Jun86 20Nov87 1 2 Label (dodoes> 3 IP rpush IP pop W inx W push Next end-code 4 5 : (;code r> last @ name> ! ; 6 7 : Does> 8 compile (;code $CD ( 8080-Call ) c, 9 compile (dodoes> ; immediate restrict 10 11 12 13 14 15 Screen 67 not modified 0 \ ?head | alignments 20Oct86 18Nov87 1 2 Variable ?head 0 ?head ! 3 4 : | ?head @ ?exit -1 ?head ! ; 5 6 \ machen nichts beim 8080: 7 : even ( addr -- addr1 ) ; immediate 8 : align ( -- ) ; immediate 9 : halign ( -- ) ; immediate 10 11 Variable warning 0 warning ! 12 13 | : exists? warning @ ?exit last @ current @ 14 (find nip 0=exit space last @ .name ." exists " ?cr ; 15 Screen 68 not modified 0 \ warning Create 20Oct86 18Nov87 1 2 Defer makeview ' 0 Is makeview 3 4 : (create ( string -- ) align here 5 swap count $1F and here 4+ place makeview , current @ @ , 6 here last ! here c@ 1+ allot align exists? 7 ?head @ IF 1 ?head +! dup , \ Pointer to Code 8 halign heapmove $20 flag! dup dp ! 9 THEN drop reveal 0 , 10 ;Code W inx W push Next end-code 11 12 : Create name count 1 $20 uwithin not 13 Abort" invalid name" 1- (create ; 14 15 Screen 69 not modified 0 \ nfa? 30Jun86 1 2 Code nfa? ( thread cfa -- nfa / false ) 3 D pop H pop 4 [[ M A mov H inx M H mov A L mov 5 H ora Hpush jz H push H inx H inx H push D push 6 M A mov H inx $1F ani A E mov 0 D mvi D dad 7 D pop xthl M A mov H pop $20 ani 8 0<> ?[ M A mov H inx M H mov A L mov ]? 9 H A mov D cmp 0= ?[ L A mov E cmp ]? 10 H pop 0= ?] H inx H inx Hpush jmp 11 end-code 12 \\ 13 : nfa? ( thread cfa -- nfa / false) 14 >r BEGIN @ dup 0= IF rdrop exit THEN dup 2+ name> r@ = 15 UNTIL 2+ rdrop ; Screen 70 not modified 0 \ >name name> >body .name 30Jun86 07Oct87 1 2 : >name ( cfa -- nfa / false ) voc-link 3 BEGIN @ dup WHILE 2dup 4 - swap nfa? 4 ?dup IF -rot 2drop exit THEN REPEAT nip ; 5 6 Code (name> ( nfa -- cfa ) H pop M A mov H inx $1F ani 7 A E mov 0 D mvi D dad hpush jmp end-code 8 \ : (name> ( nfa -- cfa ) count $1F and + ; 9 10 : name> ( nfa -- cfa ) dup (name> swap c@ $20 and IF @ THEN ; 11 12 : >body ( cfa -- pfa ) 2+ ; : body> ( pfa -- cfa ) 2- ; 13 14 : .name ( nfa -- ) ?dup IF dup heap? IF ." |" THEN 15 count $1F and type ELSE ." ???" THEN space ; Screen 71 not modified 0 \ : ; Constant Variable 07Nov87 1 2 : Create: Create hide current @ context ! 0 ] ; 3 4 : : Create: ;Code IP rpush W inx W IP mvx Next end-code 5 6 : ; 0 ?pairs compile unnest [compile] [ reveal ; 7 immediate restrict 8 9 : Constant ( n -- ) Create , ;Code 10 W inx xchg M E mov H inx M D mov D push Next 11 end-code 12 13 : Variable Create 0 , ; 14 15 Screen 72 not modified 0 \ uallot User Alias Defer 11Jun86 18Nov87 1 : uallot ( quan -- offset ) even dup udp @ + 2 $FF u> Abort" Userarea full" udp @ swap udp +! ; 3 4 : User Create 2 uallot c, 5 ;Code W inx W ldax A E mov 0 D mvi 6 UP lhld D dad hpush jmp end-code 7 8 : Alias ( cfa -- ) Create last @ dup c@ $20 and 9 IF -2 allot ELSE $20 flag! THEN (name> ! ; 10 11 | : crash true Abort" crash" ; 12 13 : Defer Create ['] crash , 14 ;Code W inx xchg M E mov H inx M D mov 15 xchg >next1 jmp end-code Screen 73 not modified 0 \ vp current context also toss 11Jun86 1 2 Create vp $10 allot Variable current 3 4 : context ( -- adr ) vp dup @ + 2+ ; 5 6 | : thru.vocstack ( -- from to ) vp 2+ context ; 7 \ "Only Forth also Assembler" gives 8 \ vp: countword = 6 | Only | Forth | Assembler | 9 10 : also vp @ $0A > Error" Vocabulary stack full" 11 context @ 2 vp +! context ! ; 12 : toss vp @ IF -2 vp +! THEN ; 13 14 15 Screen 74 not modified 0 \ Vocabulary Forth Only Onlyforth 24Nov85 18Nov87 1 2 : Vocabulary 3 Create 0 , 0 , here voc-link @ , voc-link ! 4 Does> context ! ; 5 \ | Name | Code | Thread | Coldthread | Voc-link | 6 7 Vocabulary Forth 8 Vocabulary Root 9 10 : Only vp off Root also ; 11 12 : Onlyforth Only Forth also definitions ; 13 14 15 Screen 75 not modified 0 \ definitions order words 10Oct87 20Nov87 1 2 | : init-vocabularys voc-link @ 3 BEGIN dup 2- @ over 4- ! @ ?dup 0= UNTIL ; 4 5 : definitions context @ current ! ; 6 7 | : .voc ( adr -- ) @ 2- >name .name ; 8 9 : order vp 4+ context DO I .voc -2 +LOOP 10 2 spaces current .voc ; 11 12 : words context @ 13 BEGIN @ dup stop? 0= and 14 WHILE ?cr dup 2+ .name space 15 REPEAT drop ; Screen 76 not modified 0 \ found -text 11Jun86 1 | : found ( nfa -- cfa n ) 2 dup c@ >r (name> r@ $20 and IF @ THEN 3 -1 r@ $80 and IF 1- THEN 4 r> $40 and IF negate THEN ; 5 6 \\ 7 : -text ( adr1 u adr2 -- false:gleich/+1:str1>str2/-1:str1r count $1F and strlen ! string ! 13 BEGIN r> ?dup WHILE dup @ >r 2+ dup c@ $1F and strlen @ = 14 IF dup 1+ strlen @ string @ -text 0= ?dup IF rdrop exit THEN 15 THEN drop REPEAT string @ 1- false ; Screen 77 not modified 0 \ (find 11Jun86 1 2 Code (find ( str thr - str false/ NFA true ) 3 H pop D pop IP push D ldax $1F ani A C mov D inx 4 Label findloop 5 M A mov H inx M H mov A L mov 6 H A mov L ora 0= ?[ IP pop D dcx D push no jmp ]? 7 H push H inx H inx M A mov $1F ani C cmp 8 0<> ?[ H pop findloop jmp ]? 9 D push H inx C B mov B inr 10 [[ B dcr 0<> ?[[ 11 D ldax M cmp 0<> ?[ D pop H pop findloop jmp ]? 12 H inx D inx ]]? 13 D pop H pop H inx H inx IP pop H push yes jmp 14 end-code 15 \\ HL: thread, nfa DE: string C: strlen B: counter Screen 78 not modified 0 \ find ' [compile] ['] nullstring? 18Nov87 1 2 : find ( string -- cfa n / string false ) 3 context dup @ over 2- @ = IF 2- THEN 4 BEGIN under @ (find IF nip found exit THEN 5 over vp 2+ u> WHILE swap 2- REPEAT nip false ; 6 7 : ' ( -- cfa ) name find ?exit Error" ?" ; 8 9 : [compile] ' , ; immediate restrict 10 11 : ['] ' [compile] Literal ; immediate restrict 12 13 : nullstring? ( string -- string false / true ) 14 dup c@ 0= dup 0=exit nip ; 15 Screen 79 not modified 0 \ notfound 17Oct86UH 25Jan88 1 2 : no.extensions ( string -- ) 3 state @ IF Abort" ?" THEN Error" ?" ; 4 5 Defer notfound ' no.extensions Is notfound 6 7 8 9 10 11 12 13 14 15 Screen 80 not modified 0 \ interpret interpreter compiler parser UH 25Jan88 1 Defer parser 2 3 : interpret ( -- ) 4 BEGIN ?stack name nullstring? ?exit parser REPEAT ; 5 6 | : interpreter ( str -- ) find ?dup 7 IF 1 and IF execute exit THEN Error" compile only" THEN 8 number? ?exit notfound ; 9 10 ' interpreter Is parser 11 12 | : compiler ( str -- ) find ?dup 13 IF 0> IF execute exit THEN , exit THEN 14 number? ?dup IF 0> IF swap [compile] Literal THEN 15 [compile] Literal exit THEN notfound ; Screen 81 not modified 0 \ [ ] UH 25Jan88 1 2 : [ ['] interpreter Is Parser state off ; immediate 3 4 : ] ['] compiler Is Parser state on ; 5 6 7 8 9 10 11 12 13 14 15 Screen 82 not modified 0 \ Is 09May86UH 25Jan88 1 2 : (is r> dup 2+ >r @ ! ; 3 4 | : def? ( cfa -- ) 5 @ [ ' notfound @ ] Literal - Abort" not deferred" ; 6 7 : Is ( adr -- ) ' dup def? >body 8 state @ IF compile (is , exit THEN ! ; immediate 9 10 11 12 13 14 15 Screen 83 not modified 0 \ ?stack 30Jun86 1 | : stackfull ( -- ) depth $20 > Abort" tight stack" 2 reveal last? IF dup heap? IF name> ELSE 4- THEN (forget THEN 3 true Abort" Dictionary full" ; 4 5 Code ?stack 6 UP lhld user' dp D lxi D dad M E mov H inx M D mov 7 0 H lxi SP dad L A mov E sub H A mov D sbb 8 0= ?[ ;c: stackfull ; Assembler ]? H push 9 UP lhld user' s0 D lxi D dad M E mov H inx M D mov 10 H pop D A mov H cmp c0= ?[ 0= ?[ E A mov L cmp ]? ]? 11 >next jnc ;c: true abort" Stack empty" ; 12 \\ 13 : ?stack sp@ here - 100 u< IF stackfull THEN 14 sp@ s0 @ u> Abort" Stack empty" ; 15 Screen 84 not modified 0 \ .status push load 20Oct86 1 2 Defer .status ' noop Is .status 3 4 | Create: pull r> r> ! ; 5 6 : push ( addr -- ) r> swap dup >r @ >r pull >r >r ; 7 restrict 8 9 : (load ( blk offset -- ) 10 isfile push loadfile push fromfile push blk push >in push 11 >in ! blk ! isfile@ loadfile ! .status interpret ; 12 13 : load ( blk --) ?dup 0=exit 0 (load ; 14 15 Screen 85 not modified 0 \ +load thru +thru --> rdepth depth 20Oct86 1 2 : +load ( offset --) blk @ + load ; 3 4 : thru ( from to --) 1+ swap DO I load LOOP ; 5 : +thru ( off0 off1 --) 1+ swap DO I +load LOOP ; 6 7 : --> 1 blk +! >in off .status ; immediate 8 9 : rdepth ( -- +n) r0 @ rp@ 2+ - 2/ ; 10 : depth ( -- +n) sp@ s0 @ swap - 2/ ; 11 12 13 14 15 Screen 86 not modified 0 \ quit (quit abort UH 25Jan88 1 2 : (prompt ( -- ) 3 state @ IF cr ." ] " ELSE ." ok" cr THEN .status ; 4 5 Defer prompt ' (prompt Is prompt 6 7 : (quit BEGIN prompt query interpret REPEAT ; 8 9 Defer 'quit ' (quit Is 'quit 10 : quit r0 @ rp! level off [compile] [ 'quit ; 11 12 : standardi/o [ output ] Literal output 4 cmove ; 13 14 Defer 'abort ' noop Is 'abort 15 : abort end-trace clearstack 'abort standardi/o quit ; Screen 87 not modified 0 \ (error Abort" Error" 20Oct86 18Nov87 1 2 Variable scr 1 scr ! Variable r# 0 r# ! 3 4 : (error ( string -- ) standardi/o space here .name 5 count type space ?cr 6 blk @ ?dup IF scr ! >in @ r# ! THEN quit ; 7 ' (error errorhandler ! 8 9 : (abort" "lit swap IF >r clearstack r> 10 errorhandler perform exit THEN drop ; restrict 11 12 | : (err" "lit swap IF errorhandler perform exit THEN 13 drop ; restrict 14 : Abort" compile (abort" ," align ; immediate restrict 15 : Error" compile (err" ," align ; immediate restrict Screen 88 not modified 0 \ -trailing 30Jun86 18Nov87 1 2 Code -trailing ( addr n1 -- addr n2 ) 3 D pop H pop H push 4 D dad xchg D dcx 5 Label -trail H A mov L ora hpush jz 6 D ldax BL cpi hpush jnz 7 H dcx D dcx -trail jmp end-code 8 9 \\ 10 : -trailing ( addr n1 -- addr n2) 11 2dup bounds ?DO 2dup + 1- c@ bl - IF LEAVE THEN 1- LOOP ; 12 13 14 15 Screen 89 not modified 0 \ space spaces 30Jun86 1 2 $20 Constant bl 3 4 : space bl emit ; 5 : spaces ( u --) 0 ?DO space LOOP ; 6 7 8 9 10 11 12 13 14 15 Screen 90 not modified 0 \ hold <# #> sign # #s 17Oct86 1 2 | : hld ( -- addr) pad 2- ; 3 4 : hold ( char -- ) -1 hld +! hld @ c! ; 5 6 : <# hld hld ! ; 7 8 : #> ( 32b -- addr +n ) 2drop hld @ hld over - ; 9 10 : sign ( n -- ) 0< IF Ascii - hold THEN ; 11 12 : # ( +d1 -- +d2) base @ ud/mod rot 9 over < 13 IF [ Ascii A Ascii 9 - 1- ] Literal + THEN Ascii 0 + hold ; 14 15 : #s ( +d -- 0 0 ) BEGIN # 2dup d0= UNTIL ; Screen 91 not modified 0 \ print numbers 24Dec83 1 2 : d.r -rot under dabs <# #s rot sign #> 3 rot over max over - spaces type ; 4 5 : .r swap extend rot d.r ; 6 7 : u.r 0 swap d.r ; 8 9 : d. 0 d.r space ; 10 11 : . extend d. ; 12 13 : u. 0 d. ; 14 15 Screen 92 not modified 0 \ .s list c/l l/s 05Oct87 1 2 : .s sp@ s0 @ over - $20 umin bounds ?DO I @ u. 2 +LOOP ; 3 4 $40 Constant c/l \ Screen line length 5 $10 Constant l/s \ lines per screen 6 7 : list ( blk -- ) 8 scr ! ." Scr " scr @ u. 9 l/s 0 DO 10 cr I 2 .r space scr @ block I c/l * + c/l -trailing type 11 LOOP cr ; 12 13 14 15 Screen 93 not modified 0 \ multitasker primitives 20Nov87 1 2 Code end-trace \ patch Next to its original state 3 $0A A mvi ( IP ldax ) >next sta 4 $6F03 H lxi ( IP inx A L mov ) >next 1+ shld Next end-code 5 6 Code pause >next here 2- ! end-code 7 8 : lock ( addr -- ) dup @ up@ = IF drop exit THEN 9 BEGIN dup @ WHILE pause REPEAT up@ swap ! ; 10 11 : unlock ( addr -- ) dup lock off ; 12 13 Label wake H pop H dcx UP shld 14 6 D lxi D dad M A mov H inx M H mov A L mov sphl 15 H pop RP shld IP pop Next end-code Screen 94 not modified 0 \ buffer mechanism 20Oct86 07Oct87 1 2 User isfile 0 isfile ! \ addr of file control block 3 Variable fromfile 0 fromfile ! 4 Variable prev 0 prev ! \ Listhead 5 | Variable buffers 0 buffers ! \ Semaphor 6 $408 Constant b/buf \ physikalische Groesse 7 $400 Constant b/blk 8 \\ Struktur eines Buffers: 0 : link 9 2 : file 10 4 : blocknummer 11 6 : statusflags 12 8 : Data ... 1 Kb ... 13 Statusflag bits : 15 1 -> updated 14 file : -1 -> empty buffer, 0 -> no fcb, direct access 15 else addr of fcb ( system dependent ) Screen 95 not modified 0 \ search for blocks in memory 30Jun86 1 | Variable pred 2 \ DE:blk BC:file HL:bufadr 3 4 Label thisbuffer? ( Zero = this buffer ) 5 H push H inx H inx M A mov C cmp 0= 6 ?[ H inx M A mov B cmp 0= ?[ H inx M A mov E cmp 7 0= ?[ H inx M A mov D cmp ]? ]? ]? H pop ret 8 9 Code (core? ( blk file -- adr\blk file ) 10 IP H mvx Ipsave shld 11 user' offset D lxi UP lhld D dad 12 M E mov H inx M D mov 13 B pop H pop H push B push D dad xchg 14 prev lhld 15 thisbuffer? call 0= ?[ Screen 96 not modified 0 \ search for blocks in memory 30Jun86 1 2 Label blockfound 3 D pop D pop 8 D lxi D dad H push ' exit @ jmp ]? 4 [[ pred shld 5 M A mov H inx M H mov A L mov 6 H ora 0= ?[ IPsave lhld H IP mvx Next ]? 7 thisbuffer? call 0= ?] 8 xchg pred lhld D ldax A M mov 9 H inx D inx D ldax A M mov D dcx 10 prev lhld xchg E M mov H inx D M mov 11 H dcx prev shld 12 blockfound jmp end-code 13 14 15 Screen 97 not modified 0 \ (core? 29Jun86 1 \\ 2 3 | : this? ( blk file bufadr -- flag ) 4 dup 4+ @ swap 2+ @ d= ; 5 6 | : (core? ( blk file -- dataaddr / blk file ) 7 BEGIN over offset @ + over prev @ this? 8 IF rdrop 2drop prev @ 8 + exit THEN 9 2dup >r offset @ + >r prev @ 10 BEGIN dup @ ?dup 0= IF rdrop rdrop drop exit THEN 11 dup r> r> 2dup >r >r rot this? 0= 12 WHILE nip REPEAT 13 dup @ rot ! prev @ over ! prev ! rdrop rdrop 14 REPEAT ; 15 Screen 98 not modified 0 \ (diskerr 29Jul86 07Oct87 1 2 : (diskerr 3 ." error! r to retry " key $FF and 4 capital Ascii R = not Abort" aborted" ; 5 6 Defer diskerr 7 ' (diskerr Is diskerr 8 9 Defer r/w 10 11 12 13 14 15 Screen 99 not modified 0 \ backup emptybuf readblk 20Oct86 1 2 | : backup ( bufaddr -- ) dup 6+ @ 0< 3 IF 2+ dup @ 1+ \ buffer empty if file = -1 4 IF input push output push standardi/o 5 BEGIN dup 6+ over 2+ @ 2 pick @ 0 r/w 6 WHILE ." write " diskerr 7 REPEAT THEN 4+ dup @ $7FFF and over ! THEN drop ; 8 9 : emptybuf ( bufaddr -- ) 2+ dup on 4+ off ; 10 11 | : readblk ( blk file addr -- blk file addr ) 12 dup emptybuf 13 input push output push standardi/o >r 14 BEGIN over offset @ + over r@ 8 + -rot 1 r/w 15 WHILE ." read " diskerr REPEAT r> ; Screen 100 not modified 0 \ take mark updates? core? 10Mar86 19Nov87 1 2 | : take ( -- bufaddr) prev 3 BEGIN dup @ WHILE @ dup 2+ @ -1 = UNTIL 4 buffers lock dup backup ; 5 6 | : mark ( blk file bufaddr -- blk file ) 7 2+ >r 2dup r@ ! offset @ + r@ 2+ ! r> 4+ off 8 buffers unlock ; 9 10 | : updates? ( -- bufaddr / flag) 11 prev BEGIN @ dup WHILE dup 6+ @ 0< UNTIL ; 12 13 : core? ( blk file -- addr /false ) (core? 2drop false ; 14 15 Screen 101 not modified 0 \ block & buffer manipulation 20Oct86 18Nov87 1 2 : (buffer ( blk file -- addr ) 3 BEGIN (core? take mark REPEAT ; 4 5 : (block ( blk file -- addr ) 6 BEGIN (core? take readblk mark REPEAT ; 7 8 Code isfile@ ( -- addr ) user' isfile D lxi 9 UP lhld D dad fetch jmp end-code 10 11 : buffer ( blk -- addr ) isfile@ (buffer ; 12 13 : block ( blk -- addr ) isfile@ (block ; 14 15 \ : isfile@ ( -- addr ) isfile @ ; Screen 102 not modified 0 \ block & buffer manipulation 05Oct87 1 2 : update $80 prev @ 6+ 1+ ( Byte-Order! ) c! ; 3 4 Defer save-dos-buffers 5 6 : save-buffers ( -- ) buffers lock 7 BEGIN updates? ?dup WHILE backup REPEAT save-dos-buffers 8 buffers unlock ; 9 10 : empty-buffers ( -- ) buffers lock prev 11 BEGIN @ ?dup WHILE dup emptybuf REPEAT buffers unlock ; 12 13 : flush save-buffers empty-buffers ; 14 15 Screen 103 not modified 0 \ Allocating buffers 10Oct87 1 $10000 Constant limit Variable first 2 3 : allotbuffer ( -- ) 4 first @ r0 @ - b/buf 2+ u< ?exit 5 b/buf negate first +! first @ dup emptybuf 6 prev @ over ! prev ! ; 7 8 : freebuffer ( -- ) first @ limit b/buf - u< 9 IF first @ backup prev 10 BEGIN dup @ first @ - WHILE @ REPEAT 11 first @ @ swap ! b/buf first +! THEN ; 12 13 : all-buffers BEGIN first @ allotbuffer first @ = UNTIL ; 14 15 | : init-buffers prev off limit first ! all-buffers ; Screen 104 not modified 0 \ endpoints of forget 01Jul86 1 2 | : |? ( nfa -- flag ) c@ $20 and ; 3 | : forget? ( adr nfa -- flag ) \ code in heap or above adr ? 4 name> under 1+ u< swap heap? or ; 5 6 | : endpoints ( addr -- addr symb ) 7 heap voc-link @ >r 8 BEGIN r> @ ?dup \ through all Vocabs 9 WHILE dup >r 4- >r \ link on returnstack 10 BEGIN r> @ >r over 1- dup r@ u< \ until link or 11 swap r@ 2+ name> u< and \ code under adr 12 WHILE r@ heap? [ 2dup ] UNTIL \ search for name in heap 13 r@ 2+ |? IF over r@ 2+ forget? 14 IF r@ 2+ (name> 2+ umax THEN \ then update symb 15 THEN REPEAT rdrop REPEAT ; Screen 105 not modified 0 \ remove, -words, -tasks 20Oct86 1 2 : remove ( dic sym thread - dic sym ) 3 BEGIN dup @ ?dup \ unlink forg. words 4 WHILE dup heap? 5 IF 2 pick over u> ELSE 3 pick over 1+ u< THEN 6 IF @ over ! ( unlink word) ELSE nip THEN REPEAT drop ; 7 8 | : remove-words ( dic sym -- dic sym ) 9 voc-link BEGIN @ ?dup 10 WHILE dup >r 4- remove r> REPEAT ; 11 12 | : remove-tasks ( dic -- ) up@ 13 BEGIN 2+ dup @ up@ - WHILE 2dup @ swap here uwithin 14 IF dup @ 2+ @ over ! 2- 15 ELSE @ THEN REPEAT 2drop ; Screen 106 not modified 0 \ remove-vocs trim 20Oct86 07Oct87 1 2 | : remove-vocs ( dic symb -- dic symb ) 3 voc-link remove thru.vocstack 4 DO 2dup I @ -rot uwithin 5 IF [ ' Forth 2+ ] Literal I ! THEN -2 +LOOP 6 2dup current @ -rot uwithin 7 IF [ ' Forth 2+ ] Literal current ! THEN ; 8 9 Defer custom-remove ' noop Is custom-remove 10 11 | : trim ( dic symb -- ) 12 over remove-tasks remove-vocs remove-words 13 custom-remove heap swap - hallot dp ! 0 last ! ; 14 15 Screen 107 not modified 0 \ deleting words from dict. 01Jul86 18Nov87 1 2 : clear here dup up@ trim dp ! ; 3 4 : (forget ( adr --) dup heap? Abort" is symbol" 5 endpoints trim ; 6 7 : forget ' dup [ dp ] Literal @ u< Abort" protected" 8 >name dup heap? 9 IF name> ELSE 4- THEN (forget ; 10 11 : empty [ dp ] Literal @ up@ trim 12 [ udp ] Literal @ udp ! ; 13 14 15 Screen 108 not modified 0 \ save bye stop? ?cr 18Nov87 1 2 : save here up@ trim 3 voc-link @ BEGIN dup 4- @ over 2- ! @ ?dup 0= UNTIL 4 up@ origin $100 cmove ; 5 6 : bye flush empty (bye ; 7 8 | : end? key #cr = IF true rdrop THEN ; 9 10 : stop? ( -- flag ) key? IF end? end? THEN false ; 11 12 : ?cr col c/l u> 0=exit cr ; 13 14 15 Screen 109 not modified 0 \ in/output structure 07Jun86 1 2 | : Out: Create dup c, 2+ Does> c@ output @ + perform ; 3 4 : Output: Create: Does> output ! ; 5 0 Out: emit Out: cr Out: type Out: del 6 Out: page Out: at Out: at? drop 7 8 : row ( -- row) at? drop ; 9 : col ( -- col) at? nip ; 10 11 | : In: Create dup c, 2+ Does> c@ input @ + perform ; 12 13 : Input: Create: Does> input ! ; 14 0 In: key In: key? In: decode In: expect drop 15 Screen 110 not modified 0 \ Alias only definitionen 18Nov87 1 2 Root definitions Forth 3 4 : seal [ ' Root >body ] Literal off ; \ "erase" Root Vocab. 5 6 ' Only Alias Only 7 ' Forth Alias Forth 8 ' words Alias words 9 ' also Alias also 10 ' definitions Alias definitions 11 12 Host Target 13 14 15 Screen 111 not modified 0 \ 'restart 'cold 22Oct86 10Oct87 1 2 Defer 'restart ' noop Is 'restart 3 4 | : (restart ['] (quit Is 'quit drvinit 'restart 5 [ errorhandler ] Literal @ errorhandler ! 6 ['] noop Is 'abort clearstack 7 standardi/o interpret quit ; 8 9 Defer 'cold ' noop Is 'cold 10 11 | : (cold origin up@ $100 cmove $80 count 12 $50 umin >r tib r@ move r> #tib ! >in off blk off 13 init-vocabularys init-buffers flush 'cold 14 Onlyforth page &24 spaces logo count type cr (restart ; 15 Screen 112 not modified 0 \ cold bootsystem 20Oct86 1 2 Code cold here >cold ! 3 s0 lhld 6 D lxi D dad origin D lxi $3F C mvi 4 [[ D ldax A M mov H inx D inx C dcr 0= ?] 5 ' (cold >body IP lxi 6 Label bootsystem 7 s0 lhld 6 D lxi D dad UP shld 8 user' s0 D lxi D dad 9 M E mov H inx M D mov xchg sphl 10 user' r0 D lxi UP lhld D dad 11 M E mov H inx M D mov xchg RP shld 12 $C3 ( jmp ) A mvi $30 sta wake H lxi $31 shld ( Tasker ) 13 Next 14 end-code 15 Screen 113 not modified 0 \ restart boot 20Oct86 1 2 Code restart here >restart ! 3 ' (restart >body IP lxi bootsystem jmp end-code 4 5 Label boot here >boot ! \ find link to Main: 6 s0 lhld 6 D lxi D dad H B mvx origin D lxi 7 [[ [[ xchg H inx H inx M E mov H inx M D mov 8 D A mov B cmp 0= ?] E A mov C cmp 0= ?] H B mvx 9 6 lhld 0 L mvi ' limit >body shld 10 -$1100 D lxi D dad r0 shld \ set initial RP 11 -$400 D lxi D dad s0 shld \ set initial SP 12 6 D lxi D dad xchg B H mvx 13 D M mov H dcx E M mov \ set link to Maintask 14 >cold 2- jmp 15 end-code Screen 114 not modified 0 \ "search 05Mar88 1 2 Label notfound H pop H pop 3 IPsave lhld H IP mvx False H lxi hpush jmp 4 5 Code "search ( text tlen buf blen -- addr tf / ff ) 6 IP H mvx IPsave shld D pop H pop xthl 7 H A mov L ora notfound jz 8 E A mov L sub A C mov D A mov H sbb A B mov notfound jc 9 B inx D pop xthl M A mov xthl H push xchg 10 Label scanfirst 11 A E mov ?capital call E D mov 12 [[ M E mov H inx B A mov C ora notfound jz B dcx 13 ?capital call E A mov D cmp 0= ?] 14 B D mvx B pop xchg xthl xchg H push B push D push 15 Screen 115 not modified 0 \ "search part 2 27Nov87 1 2 Label match 3 B dcx B A mov C ora 0<> ?[ 4 D inx D ldax D push A E mov ?capital call E D mov 5 M E mov H inx ?capital call E A mov D cmp D pop 6 match jz H pop B pop D pop 7 M A mov xthl B push H B mvx xchg scanfirst jmp ]? 8 D pop D pop H pop D pop H dcx H push 9 IPsave lhld H IP mvx True H lxi hpush jmp 10 end-code 11 12 13 14 15 Screen 116 not modified 0 \ Rest of Standard-System 04Oct87 07Oct87 1 2 2 +load \ Operating System 3 4 Host ' Transient 8 + @ Transient Forth Context @ 6 + ! 5 6 Target Forth also definitions 7 8 Vocabulary Assembler Assembler definitions 9 Transient Assembler 10 >Next Constant >Next 11 hpush Constant hpush 12 dpush Constant dpush 13 14 Target Forth also definitions 15 : forth-83 ; \ last word in Dictionary Screen 117 not modified 0 \ System patchup 04Oct87 1 2 $EF00 r0 ! 3 $EB00 s0 ! 4 s0 @ 6 + origin 2+ ! \ link Maintask to itself 5 6 \ s0 und r0 werden beim Booten neu an die Speichergroesse 7 \ angepasst. Ebenso der Multi-Tasker-Link auf die Maintask 8 9 here dp ! 10 11 Host Tudp @ Target udp ! 12 Host Tvoc-link @ Target voc-link ! 13 Host move-threads 14 15 Screen 118 not modified 0 \ System dependent Load-Screen 20Nov87 1 2 1 +load \ CP/M interface 3 4 2 4 +thru \ Character IO 5 6 5 7 +thru \ Default Disk IO 7 8 8 +load \ Postlude 9 10 \ 9 +load \ Index 11 12 13 14 15 Screen 119 not modified 0 \ CP/M-Interface 05Oct87 1 Vocabulary Dos Dos definitions also 2 Label >bios pchl 3 Code biosa ( arg fun -- res ) 4 1 lhld D pop D dcx D dad D dad D dad 5 D pop IP push D IP mvx >bios call 6 Label back 7 IP pop 0 H mvi A L mov Hpush jmp end-code 8 9 Code bdosa ( arg fun -- res ) 10 H pop D pop IP push L C mov 5 call back jmp 11 end-code 12 13 : bios ( arg fun -- ) biosa drop ; 14 : bdos ( arg fun -- ) bdosa drop ; 15 Screen 120 not modified 0 \ Character-IO Constants Character input 05Oct87 1 2 Target Dos also 3 4 $08 Constant #bs $0D Constant #cr 5 $0A Constant #lf $1B Constant #esc 6 $09 Constant #tab $7F Constant #del 7 $07 Constant #bel $0C Constant #ff 8 9 : con! ( c -- ) 4 bios ; 10 : (key? ( -- ? ) 0 2 biosa 0= not ; 11 : getkey ( -- c ) 0 3 biosa ; 12 13 : (key ( -- c ) BEGIN pause (key? UNTIL getkey ; 14 15 Screen 121 not modified 0 \ Character output 07Oct87 UH 27Feb88 1 2 | Code ?ctrl ( c -- c' ) H pop L A mov 3 $20 cpi cs ?[ $80 ori ]? A L mov Hpush jmp end-code 4 5 : (emit ( c -- ) ?ctrl con! pause ; 6 7 : (cr #cr con! #lf con! ; 8 : (del #bs con! bl con! #bs con! ; 9 : (at? ( -- row col ) 0 0 ; 10 11 : tipp ( addr len -- ) 0 ?DO count emit LOOP drop ; 12 13 Output: display [ here output ! ] 14 (emit (cr tipp (del noop 2drop (at? ; 15 Screen 122 not modified 0 \ Line input 04Oct87 1 2 | : backspace ( addr pos1 -- addr pos2 ) dup 0=exit (del 1- ; 3 4 : (decode ( addr pos1 key -- addr pos2 ) 5 #bs case? IF backspace exit THEN 6 #del case? IF backspace exit THEN 7 #cr case? IF dup span ! space exit THEN 8 dup emit >r 2dup + r> swap c! 1+ ; 9 10 : (expect ( addr len -- ) span ! 0 11 BEGIN span @ over u> WHILE key decode REPEAT 2drop ; 12 13 Input: keyboard [ here input ! ] 14 (key (key? (decode (expect ; 15 Screen 123 not modified 0 \ Default Disk Interface: Constants and Primitives 18Nov87 1 2 $80 Constant b/rec b/blk b/rec / Constant rec/blk 3 4 Dos definitions 5 ' 2- | Alias dosfcb> ' 2+ | Alias >dosfcb 6 7 : dos-error? ( n -- f ) $FF = ; 8 9 $5C Constant fcb 10 : reset ( -- ) 0 &13 bdos ; 11 : openfile ( fcb -- f ) &15 bdosa dos-error? ; 12 : closefile ( fcb -- f ) &16 bdosa dos-error? ; 13 : dma! ( dma -- ) &26 bdos ; 14 : rec@ ( fcb -- f ) &33 bdosa ; 15 : rec! ( fcb -- f ) &34 bdosa ; Screen 124 not modified 0 \ Default Disk Interface: open and close 20Nov87 1 2 Target Dos also Defer drvinit Dos definitions 3 4 | Variable opened 5 : default ( -- ) opened off 6 fcb 1+ c@ bl = ?exit $80 count here place #tib off 7 fcb dup dosfcb> dup isfile ! fromfile ! 8 openfile Abort" default file not found!" opened on ; 9 ' default Is drvinit 10 11 : close-default ( -- ) opened @ not ?exit 12 fcb closefile Abort" can't close default-file!" ; 13 ' close-default Is save-dos-buffers 14 15 Screen 125 not modified 0 \ Default Disk Interface: read/write 14Feb88 1 2 Target Dos also 3 4 | : rec# ( 'dosfcb -- 'rec# ) &33 + ; 5 6 : (r/w ( adr blk file r/wf -- flag ) >r 7 dup 0= Abort" no Direct Disk IO supported! " >dosfcb 8 swap rec/blk * over rec# 0 over 2+ c! ! 9 r> rot b/blk bounds 10 DO I dma! 2dup IF rec@ drop 11 ELSE rec! IF 2drop true endloop exit THEN THEN 12 over rec# 0 over 2+ c! 1 swap +! 13 b/rec +LOOP 2drop false ; 14 15 ' (r/w Is r/w Screen 126 not modified 0 \ Postlude 20Nov87 1 2 Defer postlude 3 4 | : (bye ( -- ) postlude 0 0 bdos ; 5 6 | : #pages ( -- n ) here $100 - $100 u/mod swap 0=exit 1+ ; 7 8 : .size ( -- ) base push decimal 9 cr ." Size: &" #pages u. ." Pages" ; 10 11 ' .size Is postlude 12 13 14 15 Screen 127 not modified 0 \ index findex 20Nov87 1 2 | : range ( from to -- to+1 from ) 3 2dup > IF swap THEN 1+ swap ; 4 5 : index ( from to --) 6 range DO cr I 4 .r I space block c/l type 7 stop? IF LEAVE THEN LOOP ; 8 9 10 11 12 13 14 15