1_3_2_ex14.mix

MIX的模拟器： MIX是《计算机程序设计艺术》(TAOCP)的作者高德纳(Donald.E.Knuth)在TAOCP中描述算法时使用的一种假想的机器

* DATE OF EASTER
EASTER	STJ	EASTX
	STX	Y
	ENTA	0
	DIV	=19=
	STX	GMINUS1(0:2)
	LDA	Y
	MUL	=1//100+1=
	INCA	61
	STA	CPLUS60(1:2)
	MUL	=3//4+1=
	STA	XPLUS57(1:2)
CPLUS60	ENTA	*
	MUL	=8//25+1=
GMINUS1	ENT2	*
	ENT1	1,2
	INC2	1,1
	INC2	0,2
	INC2	0,1
	INC2	0,2
	INC2	773,1
XPLUS57	INCA	-*,2
	SRAX	5
	DIV	=30=
	DECX	24
	JXN	4F
	DECX	1
	JXP	2F
	JXN	3F
	DEC1	11
	J1NP	2F
3H	INCX	1
2H	DECX	29
4H	STX	20MINUSN(0:2)
	LDA	Y
	MUL	=1//4+1=
	ADD	Y
	SUB	XPLUS57(1:2)
20MINUSN	ENN1	*
	INCA	67,1
	SRAX	5
	DIV	=7=
	SLAX	5
	DECA	-4,1
	JAN	1F
	DECA	31
	CHAR
	LDA	MARCH
	JMP	2F
1H	CHAR
	LDA	APRIL
2H	JBUS	*(18)
	STA	MONTH
	STX	DAY(1:2)
	LDA	Y
	CHAR
	STX	YEAR
	OUT	ANS(18)
EASTX	JMP	*
MARCH	ALF	MARCH
APRIL	ALF	APRIL
ANS	ALF	     
DAY	ALF	DD   
MONTH	ALF	MMMMM
	ALF	,    
YEAR	ALF	YYYYY
	ORIG	*+20
BEGIN	ENTX	1950
	ENT6	1950-2000
	JMP	EASTER
	INC6	1
	ENTX	2000,6
	J6NP	EASTER+1
	HLT
	END	BEGIN