MEMORY PLUS Manual By Lee Davison

			PROM PROGRAMMER  10 FEBRUARY 1979
			PROM ORG $0000
         
			ACCESS		*	$8B86  SYM-1 ACCESS ENTRY

			VIA RECISTER OFFSETS

			ORB		*	$0000	OUTPUT RECISTER B
			ORA		*	$0001	OUTPUT RECISTER A
			DDRB		*	$0002	DATA DIRECTION RECISTER B
			DDRA		*	$0003	DATA DIRECTION RECISTER A
			ITW0L		*	$0008	TIMER TWO LOW
			TTW0H		*	$0009	TIMER TWO HICH
			PCR		*	$000C	PERIPHERAL CONTROL REGISTER
			IFR		*	$000D	INTERRUPT FLAG RECISTER
			IER		*	$000E	INTERRUPT ENABLE RECISTER

  0000	00		SAL		=	$00	STARTING ADDRESC LOW
  0001	00		SAH		=	$00	STARUING ADDRESS HICH
  0002	00		PRMLOW		=	$00	EPROM LOW ADDRESS
  0003	00		PRMHGH		=	$00	EPROM HICH ADDRESS
  0004	00		EAL		=	$00	END ADDRESS LOW
  0005	00		EAH		=	$00	END ADDRESS HICH
  0006	00		VIA		=	$00	POINTER TO VIA
  0007	62				=	$62	NORMALLY AT 6200
  0008	40		JMPM0N		=	$40	3UMP TO MONITOR
  0009	00		MONTOR		=	$00	POINTER [0 SYSTEM MONITOR
  000A	00				=	$00	FOR RETURN FROM PROORAMMER
  0008	00		INTVEC		=	$00	POINTER [0 INTERRUPT VECTOR
  0000	00				=	$00
  0000	00		PBDD		=	$00	PORT B DATA DIRECTION
  000E	00				=	$00
  000F	00		PBD		=	$00	PORT B DATA
  0010	00				=	$00

  0011	A9 D0		BEGIN		LDAIM	$00	CLEAR ALL STATUS FLACS
  0013	48				PHA
  0014	28				PLP
  0015	A2 E0				LDXIM	STABLE	ASSUME SYM
  0017	AD FD FF			LDA	$FFFD	TEST HIGH BYTE OF INTERRUPT VECTOR
  00lA	C9 8B				CMPIM	$8B	= 8B FOR SYM-1
  0010	F0 0A				BEQ	SYM
  001E	A2 D0				LDXIM	ATABLE	ASSUME AIM 65
  0020	C9 E0				CMPIM	$E0	E0 FOR AIM 65
  0022	F0 07				BEQ	MOVE	IT IS THE AIM
  0024	A2 D8		KIM		LDXIM	KTABLE	ASSUME KIM
  0026	D0 03				BNE	MOVE
  0028	20 86 8B	SYM		JSR	ACCESS	SYM REQUIRES ACCESS

  002B	86 30		MOVE		STXZ	TABLE	+01 SETUP POINTER
  0020	A2 07				LDXIM	$07	MOVE 8 BYTES
  002F	B5 00		TABLE		LDAX	$00	REPLACED BY TABLE
  0031	95 09				STAX	MONTOR	MOVE TO MONTOR TABLE
  0033	CA				DEX
  0034	10 F9				BPL	TABLE	MOVE UNTIL X = FF


 

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