cpudiag.asm

;***********************************************************************
; MICROCOSM ASSOCIATES  8080/8085 CPU DIAGNOSTIC VERSION 1.0  (C) 1980
;***********************************************************************
;
;DONATED TO THE "SIG/M" CP/M USER'S GROUP BY:
;KELLY SMITH, MICROCOSM ASSOCIATES
;3055 WACO AVENUE
;SIMI VALLEY, CALIFORNIA, 93065
;(805) 527-9321 (MODEM, CP/M-NET (TM))
;(805) 527-0518 (VERBAL)
;
BDOS	EQU	00005H	;BDOS ENTRY TO CP/M
WBOOT	EQU	00000H	;RE-ENTRY TO CP/M WARM BOOT
ACIA0_STATUS	EQU 0x10; status read-only
ACIA0_DATA	EQU 0x11; data send/receive
PORT0		EQU 0x00; 8 bit parallel port
PORT1		EQU 0x01; 8 bit parallel port
MASK_READY	EQU 0x02;
CR		EQU 0x0D; ASCII newline
LF		EQU 0x0A; ASCII line feed
;
;
		ORG WBOOT; -- CPU starts here after reset
		DI
		JMP INIT
;
; -- Fake "BDOS", only implement functions 2 and 9 (https://www.seasip.info/Cpm/bdos.html)
; 
		ORG BDOS;

		PUSH PSW
		MOV A, C
		CPI 2
		JZ C_WRITE
		CPI 9
		JZ C_WRITESTR
DONE: 		POP PSW
		RET

C_WRITE:	MOV A, E
		OUT ACIA0_DATA
		JMP DONE

C_WRITESTR:	LDAX D
		CPI '$'
		JZ DONE
		OUT ACIA0_DATA
		INX D
		JMP C_WRITESTR

INIT: 		LXI H, 0000H
		DCX H
		SPHL
		EI
		JMP CPU

		ORG 0x0038	;-----RST7 (BTN0)
DumpMem:	LXI H, 0000H
		Call TxValueOfHL
		Call BytesAtHL
		MVI A, CR
		Call SendChar
		MVI A, 000H
DeadLoop:	CALL PSWOUT
		SUI 077H
		JNZ DeadLoop
		
BytesAtHL:	MVI C, 0x10		;dump 16 bytes at (HL)
NextByteAtHL:	MVI A, " "
		CALL SendChar
		MOV A, M
		CALL TxValueOfA
		INX H
		DCR C
		RZ			;return if reached 0
		JMP NextByteAtHL

TxValueOfHL:	MOV A, H
		CALL TxValueOfA
		MOV A, L
TxValueOfA:	PUSH PSW
		RRC
		RRC
		RRC
		RRC
		CALL TxHexDig
		POP PSW
TxHexDig:	ANI 0x0F
		ADI '0'
		CPI '9' + 1
		JM TxHexDigOut
		ADI 0x07
TxHexDigOut:	CALL SendChar
		RET
	
SendChar:	PUSH PSW
CheckIfReady:	IN ACIA0_STATUS
		ANI MASK_READY
		JZ CheckIfReady
		POP PSW
		OUT ACIA0_DATA
		RET

PSWOUT:		PUSH PSW
		PUSH PSW
		POP B
		MOV A, B
		OUT PORT1
		MOV A, C
		OUT PORT0
WaitForBtn1:	IN PORT1
		ANI 002H
		JZ WaitForBtn1
		POP PSW
		RET
;
;

		ORG	00100H
;
;
;
	JMP	CPU	;JUMP TO 8080 CPU DIAGNOSTIC
;
;
;
	DB	'MICROCOSM ASSOCIATES 8080/8085 CPU DIAGNOSTIC'
	DB	' VERSION 1.0  (C) 1980'
;
;
;

;
;
;
;MESSAGE OUTPUT ROUTINE
;
MSG:	PUSH	D	;EXILE D REG.
	XCHG		;SWAP H&L REGS. TO D&E REGS.
	MVI	C,9	;LET BDOS KNOW WE WANT TO SEND A MESSAGE
	CALL	BDOS
	POP	D	;BACK FROM EXILE
	RET
;
;
;
;CHARACTER OUTPUT ROUTINE
;
PCHAR:	MVI	C,2
	CALL	BDOS
	RET
;
;
;
BYTEO:	PUSH	PSW
	CALL	BYTO1
	MOV	E,A
	CALL	PCHAR
	POP	PSW
	CALL	BYTO2
	MOV	E,A
	JMP	PCHAR
BYTO1:	RRC
	RRC
	RRC
	RRC
BYTO2:	ANI	0FH
	CPI	0AH
	JM	BYTO3
	ADI	7
BYTO3:	ADI	30H
	RET
;
;
;
;************************************************************
;           MESSAGE TABLE FOR OPERATIONAL CPU TEST
;************************************************************
;
OKCPU:	DB	0CH,0DH,0AH,' CPU IS OPERATIONAL$'
;
NGCPU:	DB	0CH,0DH,0AH,' CPU HAS FAILED!    ERROR EXIT=$'
;
;
;
;************************************************************
;                8080/8085 CPU TEST/DIAGNOSTIC
;************************************************************
;
;NOTE: (1) PROGRAM ASSUMES "CALL",AND "LXI SP" INSTRUCTIONS WORK!
;
;      (2) INSTRUCTIONS NOT TESTED ARE "HLT","DI","EI","RIM","SIM",
;          AND "RST 0" THRU "RST 7"
;
;
;
;TEST JUMP INSTRUCTIONS AND FLAGS
;
CPU:	LXI	SP,STACK	;SET THE STACK POINTER
	ANI	0	;INITIALIZE A REG. AND CLEAR ALL FLAGS
	JZ	J010	;TEST "JZ"
	CALL	CPUER
J010:	JNC	J020	;TEST "JNC"
	CALL	CPUER
J020:	JPE	J030	;TEST "JPE"
	CALL	CPUER
J030:	JP	J040	;TEST "JP"
	CALL	CPUER
J040:	JNZ	J050	;TEST "JNZ"
	JC	J050	;TEST "JC"
	JPO	J050	;TEST "JPO"
	JM	J050	;TEST "JM"
	JMP	J060	;TEST "JMP" (IT'S A LITTLE LATE,BUT WHAT THE HELL!
J050:	CALL	CPUER
J060:	ADI	6	;A=6,C=0,P=1,S=0,Z=0
	JNZ	J070	;TEST "JNZ"
	CALL	CPUER
J070:	JC	J080	;TEST "JC"
	JPO	J080	;TEST "JPO"
	JP	J090	;TEST "JP"
J080:	CALL	CPUER
J090:	ADI	070H	;A=76H,C=0,P=0,S=0,Z=0
	JPO	J100	;TEST "JPO"
	CALL	CPUER
J100:	JM	J110	;TEST "JM"
	JZ	J110	;TEST "JZ"
	JNC	J120	;TEST "JNC"
J110:	CALL	CPUER
J120:	ADI	081H	;A=F7H,C=0,P=0,S=1,Z=0
	JM	J130	;TEST "JM"
	CALL	CPUER
J130:	JZ	J140	;TEST "JZ"
	JC	J140	;TEST "JC"
	JPO	J150	;TEST "JPO"
J140:	CALL	CPUER
J150:	ADI	0FEH	;A=F5H,C=1,P=1,S=1,Z=0
	JC	J160	;TEST "JC"
	CALL	CPUER
J160:	JZ	J170	;TEST "JZ"
	JPO	J170	;TEST "JPO"
	JM	AIMM	;TEST "JM"
J170:	CALL	CPUER
;
;
;
;TEST ACCUMULATOR IMMEDIATE INSTRUCTIONS
;
AIMM:	CPI	0	;A=F5H,C=0,Z=0
	JC	CPIE	;TEST "CPI" FOR RE-SET CARRY
	JZ	CPIE	;TEST "CPI" FOR RE-SET ZERO
	CPI	0F5H	;A=F5H,C=0,Z=1
	JC	CPIE	;TEST "CPI" FOR RE-SET CARRY ("ADI")
	JNZ	CPIE	;TEST "CPI" FOR RE-SET ZERO
	CPI	0FFH	;A=F5H,C=1,Z=0
	JZ	CPIE	;TEST "CPI" FOR RE-SET ZERO
	JC	ACII	;TEST "CPI" FOR SET CARRY
CPIE:	CALL	CPUER
ACII:	ACI	00AH	;A=F5H+0AH+CARRY(1)=0,C=1
	ACI	00AH	;A=0+0AH+CARRY(0)=0BH,C=0
	CPI	00BH
	JZ	SUII	;TEST "ACI"
	CALL	CPUER
SUII:	SUI	00CH	;A=FFH,C=0
	SUI	00FH	;A=F0H,C=1
	CPI	0F0H
	JZ	SBII	;TEST "SUI"
	CALL	CPUER
SBII:	SBI	0F1H	;A=F0H-0F1H-CARRY(0)=FFH,C=1
	SBI	00EH	;A=FFH-OEH-CARRY(1)=F0H,C=0
	CPI	0F0H
	JZ	ANII	;TEST "SBI"
	CALL	CPUER
ANII:	ANI	055H	;A=F0H<AND>55H=50H,C=0,P=1,S=0,Z=0
	CPI	050H
	JZ	ORII	;TEST "ANI"
	CALL	CPUER
ORII:	ORI	03AH	;A=50H<OR>3AH=7AH,C=0,P=0,S=0,Z=0
	CPI	07AH
	JZ	XRII	;TEST "ORI"
	CALL	CPUER
XRII:	XRI	00FH	;A=7AH<XOR>0FH=75H,C=0,P=0,S=0,Z=0
	CPI	075H
	JZ	C010	;TEST "XRI"
	CALL	CPUER
;
;
;
;TEST CALLS AND RETURNS
;
C010:	ANI	000H	;A=0,C=0,P=1,S=0,Z=1
	CC	CPUER	;TEST "CC"
	CPO	CPUER	;TEST "CPO"
	CM	CPUER	;TEST "CM"
	CNZ	CPUER	;TEST "CNZ"
	CPI	000H
	JZ	C020	;A=0,C=0,P=0,S=0,Z=1
	CALL	CPUER
C020:	SUI	077H	;A=89H,C=1,P=0,S=1,Z=0
	CNC	CPUER	;TEST "CNC"
	CPE	CPUER	;TEST "CPE"
	CP	CPUER	;TEST "CP"
	CZ	CPUER	;TEST "CZ"
	CPI	089H
	JMP C030;-----ORIGINAL: JZ	C030	;TEST FOR "CALLS" TAKING BRANCH
	CALL	CPUER
C030:	ANI	0FFH	;SET FLAGS BACK!
	CPO	CPOI	;TEST "CPO"
	CPI	0D9H
	JZ	MOVI	;TEST "CALL" SEQUENCE SUCCESS
	CALL	CPUER
CPOI:	RPE		;TEST "RPE"
	ADI	010H	;A=99H,C=0,P=0,S=1,Z=0
	CPE	CPEI	;TEST "CPE"
	ADI	002H	;A=D9H,C=0,P=0,S=1,Z=0
	RPO		;TEST "RPO"
	CALL	CPUER
CPEI:	RPO		;TEST "RPO"
	ADI	020H	;A=B9H,C=0,P=0,S=1,Z=0
	CM	CMI	;TEST "CM"
	ADI	004H	;A=D7H,C=0,P=1,S=1,Z=0
	RPE		;TEST "RPE"
	CALL	CPUER
CMI:	RP		;TEST "RP"
	ADI	080H	;A=39H,C=1,P=1,S=0,Z=0
	CP	TCPI	;TEST "CP"
	ADI	080H	;A=D3H,C=0,P=0,S=1,Z=0
	RM		;TEST "RM"
	CALL	CPUER
TCPI:	RM		;TEST "RM"
	ADI	040H	;A=79H,C=0,P=0,S=0,Z=0
	CNC	CNCI	;TEST "CNC"
	ADI	040H	;A=53H,C=0,P=1,S=0,Z=0
	RP		;TEST "RP"
	CALL	CPUER
CNCI:	RC		;TEST "RC"
	ADI	08FH	;A=08H,C=1,P=0,S=0,Z=0
	CC	CCI	;TEST "CC"
	SUI	002H	;A=13H,C=0,P=0,S=0,Z=0
	RNC		;TEST "RNC"
	CALL	CPUER
CCI:	RNC		;TEST "RNC"
	ADI	0F7H	;A=FFH,C=0,P=1,S=1,Z=0
	CNZ	CNZI	;TEST "CNZ"
	ADI	0FEH	;A=15H,C=1,P=0,S=0,Z=0
	RC		;TEST "RC"
	CALL	CPUER
CNZI:	RZ		;TEST "RZ"
	ADI	001H	;A=00H,C=1,P=1,S=0,Z=1
	CZ	CZI	;TEST "CZ"
	ADI	0D0H	;A=17H,C=1,P=1,S=0,Z=0
	RNZ		;TEST "RNZ"
	CALL	CPUER
CZI:	RNZ		;TEST "RNZ"
	ADI	047H	;A=47H,C=0,P=1,S=0,Z=0
	CPI	047H	;A=47H,C=0,P=1,S=0,Z=1
	RZ		;TEST "RZ"
	CALL	CPUER
;
;
;
;TEST "MOV","INR",AND "DCR" INSTRUCTIONS
;
MOVI:	MVI	A,077H
	INR	A
	MOV	B,A
	INR	B
	MOV	C,B
	DCR	C
	MOV	D,C
	MOV	E,D
	MOV	H,E
	MOV	L,H
	MOV	A,L	;TEST "MOV" A,L,H,E,D,C,B,A
	DCR	A
	MOV	C,A
	MOV	E,C
	MOV	L,E
	MOV	B,L
	MOV	D,B
	MOV	H,D
	MOV	A,H	;TEST "MOV" A,H,D,B,L,E,C,A
	MOV	D,A
	INR	D
	MOV	L,D
	MOV	C,L
	INR	C
	MOV	H,C
	MOV	B,H
	DCR	B
	MOV	E,B
	MOV	A,E	;TEST "MOV" A,E,B,H,C,L,D,A
	MOV	E,A
	INR	E
	MOV	B,E
	MOV	H,B
	INR	H
	MOV	C,H
	MOV	L,C
	MOV	D,L
	DCR	D
	MOV	A,D	;TEST "MOV" A,D,L,C,H,B,E,A
	MOV	H,A
	DCR	H
	MOV	D,H
	MOV	B,D
	MOV	L,B
	INR	L
	MOV	E,L
	DCR	E
	MOV	C,E
	MOV	A,C	;TEST "MOV" A,C,E,L,B,D,H,A
	MOV	L,A
	DCR	L
	MOV	H,L
	MOV	E,H
	MOV	D,E
	MOV	C,D
	MOV	B,C
	MOV	A,B
	CPI	077H
	CNZ	CPUER	;TEST "MOV" A,B,C,D,E,H,L,A
;
;
;
;TEST ARITHMETIC AND LOGIC INSTRUCTIONS
;
	XRA	A
	MVI	B,001H
	MVI	C,003H
	MVI	D,007H
	MVI	E,00FH
	MVI	H,01FH
	MVI	L,03FH
	ADD	B
	ADD	C
	ADD	D
	ADD	E
	ADD	H
	ADD	L
	ADD	A
	CPI	0F0H
	CNZ	CPUER	;TEST "ADD" B,C,D,E,H,L,A
	SUB	B
	SUB	C
	SUB	D
	SUB	E
	SUB	H
	SUB	L
	CPI	078H
	CNZ	CPUER	;TEST "SUB" B,C,D,E,H,L
	SUB	A
	CNZ	CPUER	;TEST "SUB" A
	MVI	A,080H
	ADD	A
	MVI	B,001H
	MVI	C,002H
	MVI	D,003H
	MVI	E,004H
	MVI	H,005H
	MVI	L,006H
	ADC	B
	MVI	B,080H
	ADD	B
	ADD	B
	ADC	C
	ADD	B
	ADD	B
	ADC	D
	ADD	B
	ADD	B
	ADC	E
	ADD	B
	ADD	B
	ADC	H
	ADD	B
	ADD	B
	ADC	L
	ADD	B
	ADD	B
	ADC	A
	CPI	037H
	CNZ	CPUER	;TEST "ADC" B,C,D,E,H,L,A
	MVI	A,080H
	ADD	A
	MVI	B,001H
	SBB	B
	MVI	B,0FFH
	ADD	B
	SBB	C
	ADD	B
	SBB	D
	ADD	B
	SBB	E
	ADD	B
	SBB	H
	ADD	B
	SBB	L
	CPI	0E0H
	CNZ	CPUER	;TEST "SBB" B,C,D,E,H,L
	MVI	A,080H
	ADD	A
	SBB	A
	CPI	0FFH
	CNZ	CPUER	;TEST "SBB" A
	MVI	A,0FFH
	MVI	B,0FEH
	MVI	C,0FCH
	MVI	D,0EFH
	MVI	E,07FH
	MVI	H,0F4H
	MVI	L,0BFH
	ANA	A
	ANA	C
	ANA	D
	ANA	E
	ANA	H
	ANA	L
	ANA	A
	CPI	024H
	CNZ	CPUER	;TEST "ANA" B,C,D,E,H,L,A
	XRA	A
	MVI	B,001H
	MVI	C,002H
	MVI	D,004H
	MVI	E,008H
	MVI	H,010H
	MVI	L,020H
	ORA	B
	ORA	C
	ORA	D
	ORA	E
	ORA	H
	ORA	L
	ORA	A
	CPI	03FH
	CNZ	CPUER	;TEST "ORA" B,C,D,E,H,L,A
	MVI	A,000H
	MVI	H,08FH
	MVI	L,04FH
	XRA	B
	XRA	C
	XRA	D
	XRA	E
	XRA	H
	XRA	L
	CPI	0CFH
	CNZ	CPUER	;TEST "XRA" B,C,D,E,H,L
	XRA	A
	CNZ	CPUER	;TEST "XRA" A
	MVI	B,044H
	MVI	C,045H
	MVI	D,046H
	MVI	E,047H
	;MVI	H,(TEMP0 / 0FFH)	;HIGH BYTE OF TEST MEMORY LOCATION
	MVI	H,(TEMP0 >> 8)		;HIGH BYTE OF TEST MEMORY LOCATION
	MVI	L,(TEMP0 AND 0FFH)	;LOW BYTE OF TEST MEMORY LOCATION
	MOV	M,B
	MVI	B,000H
	MOV	B,M
	MVI	A,044H
	CMP	B
	CNZ	CPUER	;TEST "MOV" M,B AND B,M
	MOV	M,D
	MVI	D,000H
	MOV	D,M
	MVI	A,046H
	CMP	D
	CNZ	CPUER	;TEST "MOV" M,D AND D,M
	MOV	M,E
	MVI	E,000H
	MOV	E,M
	MVI	A,047H
	CMP	E
	CNZ	CPUER	;TEST "MOV" M,E AND E,M
	MOV	M,H
	;MVI	H,(TEMP0 / 0FFH)
	MVI	H,(TEMP0 >> 8)
	MVI	L,(TEMP0 AND 0FFH)
	MOV	H,M
	;MVI	A,(TEMP0 / 0FFH)
	MVI	A,(TEMP0 >> 8)
	CMP	H
	CNZ	CPUER	;TEST "MOV" M,H AND H,M
	MOV	M,L
	;MVI	H,(TEMP0 / 0FFH)
	MVI	H,(TEMP0 >> 8)
	MVI	L,(TEMP0 AND 0FFH)
	MOV	L,M
	MVI	A,(TEMP0 AND 0FFH)
	CMP	L
	CNZ	CPUER	;TEST "MOV" M,L AND L,M
	;MVI	H,(TEMP0 / 0FFH)
	MVI	H,(TEMP0 >> 8)
	MVI	L,(TEMP0 AND 0FFH)
	MVI	A,032H
	MOV	M,A
	CMP	M
	CNZ	CPUER	;TEST "MOV" M,A
	ADD	M
	CPI	064H
	CNZ	CPUER	;TEST "ADD" M
	XRA	A
	MOV	A,M
	CPI	032H
	CNZ	CPUER	;TEST "MOV" A,M
	;MVI	H,(TEMP0 / 0FFH)
	MVI	H,(TEMP0 >> 8)
	MVI	L,(TEMP0 AND 0FFH)
	MOV	A,M
	SUB	M
	CNZ	CPUER	;TEST "SUB" M
	MVI	A,080H
	ADD	A
	ADC	M
	CPI	033H
	CNZ	CPUER	;TEST "ADC" M
	MVI	A,080H
	ADD	A
	SBB	M
	CPI	0CDH
	CNZ	CPUER	;TEST "SBB" M
	ANA	M
	CNZ	CPUER	;TEST "ANA" M
	MVI	A,025H
	ORA	M
	CPI	037H
	CNZ	CPUER	;TEST "ORA" M
	XRA	M
	CPI	005H
	CNZ	CPUER	;TEST "XRA" M
	MVI	M,055H
	INR	M
	DCR	M
	ADD	M
	CPI	05AH
	CNZ	CPUER	;TEST "INR","DCR",AND "MVI" M
	LXI	B,12FFH
	LXI	D,12FFH
	LXI	H,12FFH
	INX	B
	INX	D
	INX	H
	MVI	A,013H
	CMP	B
	CNZ	CPUER	;TEST "LXI" AND "INX" B
	CMP	D
	CNZ	CPUER	;TEST "LXI" AND "INX" D
	CMP	H
	CNZ	CPUER	;TEST "LXI" AND "INX" H
	MVI	A,000H
	CMP	C
	CNZ	CPUER	;TEST "LXI" AND "INX" B
	CMP	E
	CNZ	CPUER	;TEST "LXI" AND "INX" D
	CMP	L
	CNZ	CPUER	;TEST "LXI" AND "INX" H
	DCX	B
	DCX	D
	DCX	H
	MVI	A,012H
	CMP	B
	CNZ	CPUER	;TEST "DCX" B
	CMP	D
	CNZ	CPUER	;TEST "DCX" D
	CMP	H
	CNZ	CPUER	;TEST "DCX" H
	MVI	A,0FFH
	CMP	C
	CNZ	CPUER	;TEST "DCX" B
	CMP	E
	CNZ	CPUER	;TEST "DCX" D
	CMP	L
	CNZ	CPUER	;TEST "DCX" H
	STA	TEMP0
	XRA	A
	LDA	TEMP0
	CPI	0FFH
	CNZ	CPUER	;TEST "LDA" AND "STA"
	LHLD	TEMPP
	SHLD	TEMP0
	LDA	TEMPP
	MOV	B,A
	LDA	TEMP0
	CMP	B
	CNZ	CPUER	;TEST "LHLD" AND "SHLD"
	LDA	TEMPP+1
	MOV	B,A
	LDA	TEMP0+1
	CMP	B
	CNZ	CPUER	;TEST "LHLD" AND "SHLD"
	MVI	A,0AAH
	STA	TEMP0
	MOV	B,H
	MOV	C,L
	XRA	A
	LDAX	B
	CPI	0AAH
	CNZ	CPUER	;TEST "LDAX" B
	INR	A
	STAX	B
	LDA	TEMP0
	CPI	0ABH
	CNZ	CPUER	;TEST "STAX" B
	MVI	A,077H
	STA	TEMP0
	LHLD	TEMPP
	LXI	D,00000H
	XCHG
	XRA	A
	LDAX	D
	CPI	077H
	CNZ	CPUER	;TEST "LDAX" D AND "XCHG"
	XRA	A
	ADD	H
	ADD	L
	CNZ	CPUER	;TEST "XCHG"
	MVI	A,0CCH
	STAX	D
	LDA	TEMP0
	CPI	0CCH
	STAX	D
	LDA	TEMP0
	CPI	0CCH
	CNZ	CPUER	;TEST "STAX" D
	LXI	H,07777H
	DAD	H
	MVI	A,0EEH
	CMP	H
	CNZ	CPUER	;TEST "DAD" H
	CMP	L
	CNZ	CPUER	;TEST "DAD" H
	LXI	H,05555H
	LXI	B,0FFFFH
	DAD	B
	MVI	A,055H
	CNC	CPUER	;TEST "DAD" B
	CMP	H
	CNZ	CPUER	;TEST "DAD" B
	MVI	A,054H
	CMP	L
	CNZ	CPUER	;TEST "DAD" B
	LXI	H,0AAAAH
	LXI	D,03333H
	DAD	D
	MVI	A,0DDH
	CMP	H
	CNZ	CPUER	;TEST "DAD" D
	CMP	L
	CNZ	CPUER	;TEST "DAD" B
	STC
	CNC	CPUER	;TEST "STC"
	CMC
	CC	CPUER	;TEST "CMC
	MVI	A,0AAH
	CMA	
	CPI	055H
	CNZ	CPUER	;TEST "CMA"
	ORA	A	;RE-SET AUXILIARY CARRY
	DAA
	CPI	055H
	CNZ	CPUER	;TEST "DAA"
	MVI	A,088H
	ADD	A
	DAA
	CPI	076H
	CNZ	CPUER	;TEST "DAA"
	XRA	A
	MVI	A,0AAH
	DAA
	CNC	CPUER	;TEST "DAA"
	CPI	010H
	CNZ	CPUER	;TEST "DAA"
	XRA	A
	MVI	A,09AH
	DAA
	CNC	CPUER	;TEST "DAA"
	CNZ	CPUER	;TEST "DAA"
	STC
	MVI	A,042H
	RLC
	CC	CPUER	;TEST "RLC" FOR RE-SET CARRY
	RLC
	CNC	CPUER	;TEST "RLC" FOR SET CARRY
	CPI	009H
	CNZ	CPUER	;TEST "RLC" FOR ROTATION
	RRC
	CNC	CPUER	;TEST "RRC" FOR SET CARRY
	RRC
	CPI	042H
	CNZ	CPUER	;TEST "RRC" FOR ROTATION
	RAL
	RAL
	CNC	CPUER	;TEST "RAL" FOR SET CARRY
	CPI	008H
	CNZ	CPUER	;TEST "RAL" FOR ROTATION
	RAR
	RAR
	CC	CPUER	;TEST "RAR" FOR RE-SET CARRY
	CPI	002H
	CNZ	CPUER	;TEST "RAR" FOR ROTATION
	LXI	B,01234H
	LXI	D,0AAAAH
	LXI	H,05555H
	XRA	A
	PUSH	B
	PUSH	D
	PUSH	H
	PUSH	PSW
	LXI	B,00000H
	LXI	D,00000H
	LXI	H,00000H
	MVI	A,0C0H
	ADI	0F0H
	POP	PSW
	POP	H
	POP	D
	POP	B
	CC	CPUER	;TEST "PUSH PSW" AND "POP PSW"
	CNZ	CPUER	;TEST "PUSH PSW" AND "POP PSW"
	CPO	CPUER	;TEST "PUSH PSW" AND "POP PSW"
	CM	CPUER	;TEST "PUSH PSW" AND "POP PSW"
	MVI	A,012H
	CMP	B
	CNZ	CPUER	;TEST "PUSH B" AND "POP B"
	MVI	A,034H
	CMP	C
	CNZ	CPUER	;TEST "PUSH B" AND "POP B"
	MVI	A,0AAH
	CMP	D
	CNZ	CPUER	;TEST "PUSH D" AND "POP D"
	CMP	E
	CNZ	CPUER	;TEST "PUSH D" AND "POP D"
	MVI	A,055H
	CMP	H
	CNZ	CPUER	;TEST "PUSH H" AND "POP H"
	CMP	L
	CNZ	CPUER	;TEST "PUSH H" AND "POP H"
	LXI	H,00000H
	DAD	SP
	SHLD	SAVSTK	;SAVE THE "OLD" STACK-POINTER!
	LXI	SP,TEMP4
	DCX	SP
	DCX	SP
	INX	SP
	DCX	SP
	MVI	A,055H
	STA	TEMP2
	CMA
	STA	TEMP3
	POP	B
	CMP	B
	CNZ	CPUER	;TEST "LXI","DAD","INX",AND "DCX" SP
	CMA
	CMP	C
	CNZ	CPUER	;TEST "LXI","DAD","INX", AND "DCX" SP
	LXI	H,TEMP4
	SPHL
	LXI	H,07733H
	DCX	SP
	DCX	SP
	XTHL
	LDA	TEMP3
	CPI	077H
	CNZ	CPUER	;TEST "SPHL" AND "XTHL"
	LDA	TEMP2
	CPI	033H
	CNZ	CPUER	;TEST "SPHL" AND "XTHL"
	MVI	A,055H
	CMP	L
	CNZ	CPUER	;TEST "SPHL" AND "XTHL"
	CMA
	CMP	H
	CNZ	CPUER	;TEST "SPHL" AND "XTHL"
	LHLD	SAVSTK	;RESTORE THE "OLD" STACK-POINTER
	SPHL
	LXI	H,CPUOK
	PCHL		;TEST "PCHL"
;
;
;
CPUER:	PUSH PSW
	POP H
	SHLD TEMP4
	LXI	H,NGCPU	;OUTPUT "CPU HAS FAILED    ERROR EXIT=" TO CONSOLE
	CALL	MSG
	XTHL
	MOV	A,H
	CALL	BYTEO	;SHOW ERROR EXIT ADDRESS HIGH BYTE
	MOV	A,L
	CALL	BYTEO	;SHOW ERROR EXIT ADDRESS LOW BYTE
	LHLD TEMP4
	PUSH H
	POP PSW
	CALL PSWOUT
	JMP	WBOOT	;EXIT TO CP/M WARM BOOT
;
;
;
CPUOK:	LXI	H,OKCPU	;OUTPUT "CPU IS OPERATIONAL" TO CONSOLE
	CALL	MSG
	JMP	WBOOT	;EXIT TO CP/M WARM BOOT
;
; -------- RAM is implemented in top 256 bytes of the address space -------
	ORG 0FF00H
;
TEMPP:	DW	TEMP0	;POINTER USED TO TEST "LHLD","SHLD",
			; AND "LDAX" INSTRUCTIONS
;
TEMP0:	DS	1	;TEMPORARY STORAGE FOR CPU TEST MEMORY LOCATIONS
TEMP1:	DS	1	;TEMPORARY STORAGE FOR CPU TEST MEMORY LOCATIONS
TEMP2	DS	1	;TEMPORARY STORAGE FOR CPU TEST MEMORY LOCATIONS
TEMP3:	DS	1	;TEMPORARY STORAGE FOR CPU TEST MEMORY LOCATIONS
TEMP4:	DS	1	;TEMPORARY STORAGE FOR CPU TEST MEMORY LOCATIONS
SAVSTK:	DS	2	;TEMPORARY STACK-POINTER STORAGE LOCATION
;
;
;
STACK	EQU	TEMPP+128	;DE-BUG STACK POINTER STORAGE AREA
;
;
;
	END
;
;
;