mirror of
https://github.com/forth-ev/VolksForth.git
synced 2024-11-29 05:49:26 +00:00
171 lines
11 KiB
Plaintext
171 lines
11 KiB
Plaintext
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0 \ Multitasking Extension to volksFORTH cas 26jan06
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Screen 1 not modified
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0 \ Tasker Loadscreen
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1
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2 \NEEDS CODE abort( Assembler needed )
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3 hex
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4 1 5 +thru \ load Tasker
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5 7 load \ Task-Demo
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6 decimal
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Screen 2 not modified
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0 \ MULTITASKER BP 13.9.84 )
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1
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2 CODE STOP
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3 SP 2DEC IP LDA SP X) STA IP 1+ LDA SP )Y STA
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4 SP 2DEC RP LDA SP X) STA RP 1+ LDA SP )Y STA
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5 6 # LDY SP LDA UP )Y STA INY SP 1+ LDA UP )Y STA
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6 1 # LDY TYA CLC UP ADC W STA
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7 TXA UP 1+ ADC W 1+ STA W 1- JMP END-CODE
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8
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9 | CREATE TASKPAUSE ASSEMBLER
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10 2C # LDA UP X) STA ' STOP @ JMP END-CODE
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12 : SINGLETASK [ ' PAUSE @ ] LITERAL ['] PAUSE ! ;
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14 : MULTITASK TASKPAUSE ['] PAUSE ! ;
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Screen 3 not modified
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0 \ PASS ACTIVATE KS 8 MAY 84 )
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2 : PASS ( N0 .. NR-1 TADR R -- )
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3 BEGIN [ ROT ( TRICK ! ) ]
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4 SWAP 02C OVER C! \ AWAKE TASK
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5 R> -ROT \ IP R ADDR
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6 8 + >R \ S0 OF TASK
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7 R@ 2+ @ SWAP \ IP R0 R
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8 2+ 2* \ BYTES ON TASKSTACK
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9 \ INCL. R0 & IP
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10 R@ @ OVER - \ NEW SP
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11 DUP R> 2- ! \ INTO SSAVE
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12 SWAP BOUNDS ?DO I ! 2 +LOOP ; RESTRICT
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Screen 4 not modified
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0 \
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2 : ACTIVATE ( TADR --)
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3 0 [ -ROT ( TRICK ! ) ] REPEAT ; -2 ALLOT RESTRICT
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5 : SLEEP ( TADR --) 4C SWAP C! ; \ JMP-OPCODE
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7 : WAKE ( TADR --) 2C SWAP C! ; \ BIT-OPCODE
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9 | : TASKERROR ( STRING -)
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10 STANDARDI/O SINGLETASK ." TASK ERROR : " COUNT TYPE
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11 MULTITASK STOP ;
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Screen 5 not modified
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0 \ BUILDING A TASK BP 13.9.84 )
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2 : TASK ( RLEN SLEN -- )
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3 ALLOT \ STACK
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4 HERE 00FF AND 0FE =
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5 IF 1 ALLOT THEN \ 6502-ALIGN
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6 UP@ HERE 100 CMOVE \ INIT USER AREA
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7 HERE 04C C, \ JMP OPCODE TO SLEEP TASK
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8 UP@ 1+ @ ,
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9 DUP UP@ 1+ ! \ LINK TASK
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10 3 ALLOT \ ALLOT JSR WAKE
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11 DUP 6 - DUP , , \ SSAVE AND S0
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12 2DUP + , \ HERE + RLEN = R0
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13 UNDER + HERE - 2+ ALLOT ['] TASKERROR OVER
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14 [ ' ERRORHANDLER >BODY C@ ] LITERAL + ! CONSTANT ;
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Screen 6 not modified
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0 \ MORE TASKS KS/BP 26APR85RE)
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2 : RENDEZVOUS ( SEMAPHORADR -) DUP UNLOCK PAUSE LOCK ;
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4 | : STATESMART STATE @ IF [COMPILE] LITERAL THEN ;
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6 : 'S ( TADR - ADR.OF.TASKUSERVAR)
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7 ' >BODY C@ + STATESMART ; IMMEDIATE
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9 \ SYNTAX: 2 DEMOTASK 'S BASE ! \ MAKES DEMOTASK WORKING BINARY
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11 : TASKS ( -) ." MAIN " CR UP@ DUP 1+ @
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12 BEGIN 2DUP - WHILE
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13 DUP [ ' R0 >BODY C@ ] LITERAL + @ 6 + NAME> >NAME .NAME
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14 DUP C@ 04C = IF ." SLEEPING" THEN CR 1+ @ REPEAT 2DROP ;
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Screen 7 not modified
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0 \ TASKDEMO 27APR85RE)
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1 : TASKMARK ;
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3 VARIABLE COUNTER COUNTER OFF
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5 100 100 TASK BACKGROUND
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7 : >COUNT ( N -) BACKGROUND 1 PASS COUNTER !
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8 BEGIN COUNTER @ DUP 1- COUNTER ! ?DUP
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9 WHILE PAUSE 0 <# #S #> type REPEAT stop ;
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11 : WAIT BACKGROUND SLEEP ;
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13 : GO BACKGROUND WAKE ;
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Screen 8 not modified
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