mirror of
https://github.com/forth-ev/VolksForth.git
synced 2024-11-29 05:49:26 +00:00
137 lines
8.4 KiB
Forth
137 lines
8.4 KiB
Forth
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\ *** Block No. 0 Hexblock 0
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\\ *** Multitasker *** bp 12oct86
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Dieses File enth<EFBFBD>lt die Worte f<EFBFBD>r das Multitasking.
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Mit TASK werden Tasks eingerichtet. Jede Task hat ihren eige-
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nen Daten- und Returnstack, deren Gr<EFBFBD><EFBFBD>e beim Einrichten der
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Task angegeben werden mu<EFBFBD>.
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Mit MULTITASK wird der Tasker eingeschaltet, mit SINGLETASK
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abgeschaltet. Mit TASKS kann man die Tasks im System und
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ihren Zustand anzeigen.
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N<EFBFBD>heres zur Funktionsweise des Taskers findet man im Handbuch,
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ebenso wie ein ausf<EFBFBD>hrliches Glossar !
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\ *** Block No. 1 Hexblock 1
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\ Multitasker Loadscreen 22nov86bp
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Onlyforth
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\needs Code 2 loadfrom assemble.scr
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\needs multitask 1 +load
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02 05 +thru \ Tasker
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06 +load \ Spooler
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\ *** Block No. 2 Hexblock 2
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\ stop singletask multitask 14sep86we
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Code stop
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.l FP IP suba .w IP SP -) move
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.l FP RP suba .w RP SP -) move
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UP R#) D6 move D6 reg) A0 lea
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.l FP SP suba .w SP 8 A0 D) move
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2 A0 D) D6 move D6 reg) jmp end-code
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Label taskpause
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UP R#) D6 move D6 reg) A0 lea $4E43 # A0 ) move
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Forth ' stop @ Assembler bra end-code
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: singletask [ ' pause @ ] Literal ['] pause ! ;
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: multitask taskpause ['] pause ! ;
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\ *** Block No. 3 Hexblock 3
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\ pass activate bp 12oct86
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| : (pass ( n0 ... nm-1 Taskaddr m -- )
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rdrop swap \ delete IP of ACTIVATE or PASS
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$4E43 over ! \ awake Task
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r> -rot \ get the IP; Stack: IP m Taskaddr
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&10 + >r \ push s0 of Task
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r@ 2+ @ swap \ Stack-Top: IP r0 m
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2+ 2* \ bytes on Taskstack incl. r0 & IP
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r@ @ over - \ new SP
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dup r> 2- ! \ into Ssave
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swap bounds ?DO I ! 2 +LOOP ;
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: activate ( Taddr -- ) 0 (pass ; restrict
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: pass ( n0 ... nm-1 Taskaddr m ) (pass ; restrict
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\ *** Block No. 4 Hexblock 4
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\ sleep wake taskerror bp 12oct86
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: sleep ( Taddr -- ) $3C3C swap ! ; \ # D6 move opcode
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: wake ( Taddr -- ) $4E43 swap ! ; \ Trap 3 opcode
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| : taskerror ( string -- )
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standardi/o singletask bell
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at? &24 0 at ." Task error : " rot count type at
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multitask stop ;
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\ *** Block No. 5 Hexblock 5
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\ Task 14sep86we
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: Task ( rlen slen -- )
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2 arguments
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0 Constant here >r \ Task-dp
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even dup r@ + r@ 2- ! allot even \ 68000 align
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up@ here 100 cmove \ init user area
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here $3C3C , up@ 2+ @ , \ JMP opcode to sleep task
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$4EF3 , $6800 ,
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dup up@ 2+ ! \ link task
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dup 6 - dup , , \ ssave and s0
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2dup + , \ here + rlen = r0
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r@ , \ dp
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under + here - allot 0 ,
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['] taskerror swap [ ' errorhandler >body c@ ] Literal + !
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r> 2- 2- , ;
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\ *** Block No. 6 Hexblock 6
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\ rendezvous 's tasks 22nov86bp
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: rendezvous ( semaphoraddr -- )
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dup unlock pause lock ;
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| : statesmart state @ IF [compile] Literal THEN ;
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: 's ( Taddr -- adr ) \ adr is adress of the foll. uservar
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' >body c@ + statesmart ; immediate
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: tasks ( -- )
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cr ." Main " up@ dup 2+ @
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BEGIN 2dup - WHILE cr dup [ ' r0 >body c@ ] Literal + @
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2+ @ >name .name
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dup @ $3C3C = IF ." sleeping" THEN
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2+ @ REPEAT 2drop ;
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\ *** Block No. 7 Hexblock 7
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\ Printerspool 21oct86we
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$100 $200 Task spooler
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: spool' ( -- ) \ reads word
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' isfile@ offset @ base @ spooler depth 1- 6 min pass
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base ! offset ! isfile ! execute
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true abort" SPOOL' ready for next job!" stop ;
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\\ syntax:
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spool' listing
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spool' printall
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from to spool' pthru
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from to spool' document
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