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/NAME: AD ANALOG-DIGITAL CONVERTOR MODULE
/DATE: 25-08-75
/J.M.SCHIPPER , E.M.G.
/DIJKZIGT , ROTTERDAM.


CLKINT=TIME-34	/WATCH THIS MONITOR LABEL
CLZE=6130
CLOE=6132
CLAB=6133
CLSA=6135
ADCL=6530
ADLM=6531
ADRB=6533
ADLE=6536
ADENAB=1300	/ADDONE FLG;EXT.START;AUTO INCREMENT

/CALL:
/	TAD (1		/1 INDICATES "AD".
/	CDF TO BUFFER DATA FIELD
/	6770		/GIANT IOT
/ARG1,	BUFFER ADDRESS & # OF SAMPLES
/ARG2,	PRECOUNT;CLOCKRATE;# OF CHAN'S;START.CHAN.#
/	ERROR RETURN :AFTER A TIMEOUT OF APPROX 2SEC.
/	RETURN WITH # OF OVERLOADS DURING AD CONVERSIONS IN ACC

/ARG1		BITS 0-5 = BUFFERPOINTER /100(8)
/		BITS 5-11= # OF SAMPLES /100(8)

/ARG2		BITS 0-2 =PRECOUNT:SAMPLEFREQ/CLOCKRATE
/		BITS 3-5 =CLOCK RATE
/		BITS 6-8 = # OF CHAN'S 
/		BITS 9-11= STARTING CHANNEL #
/CLOCK RATE:	0 = CLOCK DOES'T RUN
/		1= 10    HZ
/		2= 100  HZ
/		3= 1000 HZ
/		4= 10  KHZ
/		5=100 KHZ
/		6= 1 MHZ
/		7= CLOCK DOES'T RUN

/DEFINE YOUR TIMES MAXIMAL TO
/WAIT BEF
DECIMAL
TIMEOUT=2	/SEE TURNS ALL OTHER BACKGRALLING BG MUST DECIDE TO TURN THE BG'S ON.
/ USING:
/	.
/	TAD (4
/	6770
/	.
	"A^100+"D&3777	/NAME: AD
	401		/TWO PAGES , ONE CONNECT
	ADC		/AD CONVERTOR 
	ADDONE		/LABEL CONNECTED TO SKPCHAIN
LABEL,	KLKINTT,	INIT
EMBASE,	0		/ENDRY,	SMA
	 JMP ADERR	/NOTAD EMBASE
	JMS I IINITA PNTSV
	CDF MONFLD	/NOW WE WANT TIMER INTERRUPTS IN THIS
/			MODULE, TO CHECK S-TRIGGER INTERRUPTS.
IFNZRO BGMAX-1 <
	TAD (-BGMAX+1		/TURN OFF ALL OTHER BG'S
	DCA ZTEM1
	TAD EMBASE
BLNEXT,	TAD (UNEXT
	JMS DEFER
	JMS DEFER	//FETCH STATUS
	AND (-BGBLOK-1
	TAD (BGBLOK
	DCA I X		//SET BACK
	TAD X
	ISZ ZTEM1
	 JMP BLNEXT	//LOOP
	CLA		>
	TAD MYCDIF	//PUT OUR FIELD IN SKIP CHAIN 
	IOF		//*SO WE CAN'T HANDLE INTERRUPS NOW
	DCA I (TIMER^4+SKPBAS+2
	TAD LABEL
	ION		//*NOW WE CAN HANDLE INTERRUPTS AGAIN
	DCA I (CONTAB+TIMER-1
EVFLAG,	CDTOIF
	CIF MONFLD	//REQUEST AN EVENTFLAG
	JMS I ZRESERV
	  JMP FLGERR	/NO FLAG 
	DCA SLOT1
	AC0001 		/ENABLE ST 1 TO FIRE
	CLOE
	CLA		/WAIT FOR THE ST 
	TAD (-TIMEOUT^12	/TIME OUT X SEC
	JMS MONITOR
	   WAIT
SLOT1,	   0		/EVENTNUMBER HERE
	TAD (-2		/TIMEOUT AC=2
	DCA EMBASE	/TEMP USE OF EMBASE SET RETURN AC=0
	JMS RESET	///RESET CLOCK & REPAIR SKPCHAIN
	TAD EMBASE	/USED AS TEMP
	DCA I PNTSV	/PUT # OF OVERLOADS R
	   EXIT RELEASE

R& REPAIR SKPCHAIN
	ADCL,MUX AND FLAGS
	TAD (-10)
	CLAB
	TAD (5410+1750	///RESET CLOCK:10 KHZ INTERRUPT ENABLED
	CLOE
	CMA
	CLZE
	CLA
	TAD (CLSA	///REPAIR SKP CHAIN
	CDF MONFLD
	IOF
	DCA I (TIMER^4+SKPBAS+2
	TAD (CLKINT
	ION
	DCA I (CONTAB+TIMER-1
	

ADERR,	JMS MONITOR
	,	JMS MONITOR
	PRECEDE	RECEDE FOR A WHILE
	JMPGE
IRESET,	RESET
ISLOT1,	SLOT1		/EVENTNUMBER
ADUPC,	0

KLKINT,	CLSA		///TIMER INTERRUPS HERE,CLEAR FLAG
	SMA CLA		///OVERFLOW?
	JMP ST		///ST FIRES !
QCKRET,	CDF CIF MONFLD	///BACK TO M-8 MONITOR
KLKSW,	SKP/0
	JMP I ZFSTEXT	///HURRY BACK
	JMP I (CLKINT	///HANDLE TIME OF DAY

ST,	DCA KLKSW	/// DON'T HANDLE TIME OF DAY NOW !
	DCA OVERLD	//*CLEAR # OF OVERLDS
	TAD (ADENAB
	ADLE		///SET AD ENABLE REG.
	TAD CHAN
	ADLM		/// SET STARTING CHANNEL
	TAD CHNLS
	DCA CHNCNT	///SET CHANNEL COUNT
	TAD PRESET
	CLAB		///SET PRECOUNT TO CLOCK
	CLA
	TAD CLENAB
	CLOE		///SET CLOCK ENABLE REG. BITS
	CMA
	CLZE		///CLEAR THE OTHER BITS
	JMP QCKRET	/// WAIT FOR AD INTERRUPTS

ADDONE,	ADRB		/// READ AD BUFFER
ADBFLD,	HLT		///OVERLAYED BY USER BUFFER FLD
	DCA I BUFP	///STORE THE SAMPLE
	TAD I BUFP	///CHECK OVERLOAD
	SPA		///MAKE SAMPLE POS.
	CIA
	TAD LIMIT	///SUBTR.LIMIT =-772
	SMA CLA		///RESULT POS. MEANS OVERLOAD
	ISZ OVERLD	/* INCREMENT # OF OVERLOADS
PROTECTION
	ISZ CHNCNT	JMP .+5
	TAD CHNLS	/// STARTING CHAN
	DCA CHNCSZ CNT		///# OF AD CONVERSIONS DONE ?
	JMP QCKRET	///NO
	JMS I IRESET
	ISZ I ADUPC	///SET NORMAL RETURN TO BG
	CDTOIF		/* GO AND TELL THE WAITER WE ARE READY
	TAD I ISLOT1	/INTERRUPT SLOT1
	CIF MONFLD
	JMS I ZKE # OF OVERLOADS WITH Y
	DCA ADUPC	/POINTS TO UDUPC
	DCA PNT		/POINTS 	TAD I PNT	/GET "GTF"
	AND C70		/MASK INSTR.FLD
	TAD C6201	/MAKE:
	DCA ADFFLD	/CDF USER INSTR FLD
	TAD I PNT	/GET "GTF" AGAIN
	AND C7		/MASK DATA FLD
	CLL RAL
LIMIT,	RTL		/ROTATE IN BITS 6-8 (ALSO USED AS #)
	TAD C6201
	DCA ADBFLD	/MAKE: CDF USER BUFFE FLD
	ISZ PNT		/POINTS TO USER ACC ADDRESS
	TAD I ADUPC	/GET ARG1 ADDRESS
	ISZ I ADUPC
	DCA ZTEM1	/STORE ARG1 POINTER
	TAD I ADUPC	/GET ARG2 ADDRESS
	ISZ I ADUPC	/SET RETURN ADDRESS
ADFFLD,	HLT		/OVERLAYED BY USER FLD
	JMS DEFER	/FETCH ARG2 (DCA X; TAD I X)
	AND C7		/MASK CHAN #
	DCA CHAN
	TAD I X		/GET ARG2
	RTR
	RAR
	AND C7		/MASK # OF CHAN'S
	SNA		/0 ?
	IAC		/THAT'S IMPOSSIBLE
	CIA
	DCA CHNLS
	TAD I X
	AND (700	/MASK CLOCK RATE
	TAD (5040	/MAKE CLOCK ENABLE REG.
	DCA CLENAB	/ OV.FLOW FLAG;CLOCK MODE01;START AD
	TAD I X
	CLL RTL
	RTL
	AND C7		/MASK PRECOUNT
	SNA
	TAD (10
	CIA		/-PRECOUNT
	DCA PRESET
	TAD I ZTEM1	/GET BUFFER ADDRESS & # OF SAMPLES
	AND (7700	/MASK BUFFER ADDRESS
	 I ZTEM1		/GET FUNC WORD	/MASK # OF SAMPLES
	CIAD (SKP	/FORCE CLOCKINT'
	DCA KLKSW
	TAD PNT		/TAKE PNT TO THE OTHER PAGE
	JMP I INIT
CHAN,	0
CHNLS,	0
CHNCNT,	0
CLENAB,	0
PRESET,	0
BUFP,	0
CNT,	0
PNT,	0

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