mirror of
https://github.com/forth-ev/VolksForth.git
synced 2024-11-29 21:49:17 +00:00
190 lines
4.4 KiB
Forth
190 lines
4.4 KiB
Forth
\ *** Block No. 84, Hexblock 54
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\ .status push load 20Oct86
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Defer .status ' noop Is .status
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: push ( addr -- ) r> swap dup >r @ >r pull >r >r ;
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restrict
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: (load ( blk offset -- )
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isfile push loadfile push fromfile push blk push >in push
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>in ! blk ! isfile@ loadfile ! .status interpret ;
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: load ( blk --) ?dup 0=exit 0 (load ;
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\ *** Block No. 85, Hexblock 55
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\ +load thru +thru --> rdepth depth 20Oct86
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: +load ( offset --) blk @ + load ;
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: thru ( from to --) 1+ swap DO I load LOOP ;
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: +thru ( off0 off1 --) 1+ swap DO I +load LOOP ;
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: --> 1 blk +! >in off .status ; immediate
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: rdepth ( -- +n) r0 @ rp@ 2+ - 2/ ;
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: depth ( -- +n) sp@ s0 @ swap - 2/ ;
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\ *** Block No. 86, Hexblock 56
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\ quit (quit abort UH 25Jan88
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: (prompt ( -- )
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state @ IF cr ." ] " ELSE ." ok" cr THEN .status ;
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Defer prompt ' (prompt Is prompt
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: (quit BEGIN prompt query interpret REPEAT ;
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Defer 'quit ' (quit Is 'quit
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: quit r0 @ rp! level off [compile] [ 'quit ;
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: standardi/o [ output ] Literal output 4 cmove ;
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Defer 'abort ' noop Is 'abort
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: abort end-trace clearstack 'abort standardi/o quit ;
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\ *** Block No. 87, Hexblock 57
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\ (error Abort" Error" 20Oct86 18Nov87
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Variable scr 1 scr ! Variable r# 0 r# !
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: (error ( string -- ) standardi/o space here .name
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count type space ?cr
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blk @ ?dup IF scr ! >in @ r# ! THEN quit ;
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' (error errorhandler !
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: (abort" "lit swap IF >r clearstack r>
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errorhandler perform exit THEN drop ; restrict
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| : (err" "lit swap IF errorhandler perform exit THEN
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drop ; restrict
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: Abort" compile (abort" ," align ; immediate restrict
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: Error" compile (err" ," align ; immediate restrict
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\ *** Block No. 88, Hexblock 58
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\ -trailing 30Jun86 18Nov87
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Code -trailing ( addr n1 -- addr n2 )
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D pop H pop H push
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D dad xchg D dcx
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Label -trail H A mov L ora hpush jz
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D ldax BL cpi hpush jnz
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H dcx D dcx -trail jmp end-code
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\ \\
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\ : -trailing ( addr n1 -- addr n2)
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\ 2dup bounds ?DO 2dup + 1- c@ bl - IF LEAVE THEN 1- LOOP ;
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\ *** Block No. 89, Hexblock 59
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\ space spaces 30Jun86
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$20 Constant bl
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: space bl emit ;
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: spaces ( u --) 0 ?DO space LOOP ;
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\ *** Block No. 90, Hexblock 5a
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\ hold <# #> sign # #s 17Oct86
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| : hld ( -- addr) pad 2- ;
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: hold ( char -- ) -1 hld +! hld @ c! ;
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: <# hld hld ! ;
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: #> ( 32b -- addr +n ) 2drop hld @ hld over - ;
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: sign ( n -- ) 0< IF Ascii - hold THEN ;
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: # ( +d1 -- +d2) base @ ud/mod rot 9 over <
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IF [ Ascii A Ascii 9 - 1- ] Literal + THEN Ascii 0 + hold ;
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: #s ( +d -- 0 0 ) BEGIN # 2dup d0= UNTIL ;
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\ *** Block No. 91, Hexblock 5b
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\ print numbers 24Dec83
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: d.r -rot under dabs <# #s rot sign #>
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rot over max over - spaces type ;
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: .r swap extend rot d.r ;
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: u.r 0 swap d.r ;
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: d. 0 d.r space ;
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: . extend d. ;
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: u. 0 d. ;
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\ *** Block No. 92, Hexblock 5c
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\ .s list c/l l/s 05Oct87
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: .s sp@ s0 @ over - $20 umin bounds ?DO I @ u. 2 +LOOP ;
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$40 Constant c/l \ Screen line length
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$10 Constant l/s \ lines per screen
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: list ( blk -- )
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scr ! ." Scr " scr @ u.
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l/s 0 DO
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cr I 2 .r space scr @ block I c/l * + c/l -trailing type
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LOOP cr ;
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\ *** Block No. 93, Hexblock 5d
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\ multitasker primitives 20Nov87
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Code end-trace \ patch Next to its original state
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$0A A mvi ( IP ldax ) >next sta
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$6F03 H lxi ( IP inx A L mov ) >next 1+ shld Next end-code
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Code pause >next here 2- ! end-code
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: lock ( addr -- ) dup @ up@ = IF drop exit THEN
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BEGIN dup @ WHILE pause REPEAT up@ swap ! ;
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: unlock ( addr -- ) dup lock off ;
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Label wake H pop H dcx UP shld
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6 D lxi D dad M A mov H inx M H mov A L mov sphl
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H pop RP shld IP pop Next end-code
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