;some hardware constants C_[n]<DecimalValue>, 'n' indicates negative value

;		

;these are in 2's complement representation

C_0	equ $040	;;00000000

C_1	equ $041	;;00000001

C_2	equ $042	;;00000002

C_3	equ $043	;;00000003

C_4	equ $044	;;00000004	

C_8	equ $045	;;00000008

C_16	equ $046	;;00000010

C_32	equ $047	;;00000020

C_256	equ $048	;;00000100

C_65536 equ $049	;;00010000

C_2^23 	equ $04A	;;00080000

C_2^28	equ $04b	;;10000000

C_2^29	equ $04c	;;20000000 (C_max /4) +1

C_2^30	equ $04d	;;40000000 ( C_max / 2 ) + 1 (almost half)	

C_nmax	equ $04e	;;80000000 most negative number

C_max	equ $04f	;;7fffffff most positive number	

C_n1	equ $050	;;ffffffff -1

C_n2	equ $051	;;fffffffe -2

C_n2^30	equ $052	;;c0000000 C_nmax /2

C_LSshift equ $55	;;to left shift an address by using macsints

			;;for fractional addresses

ZERO equ C_0;

ONE equ	C_1;

;;; Hardware Registers:	

ACCUM	equ $56

CCR	equ $57	

NOISE1	equ $58

NOISE2	equ $59	

IRQ	equ $5A	

DBAC	equ $5B	

and	macro	dest,srcA,srcB

	andxor	dest,srcA,srcB,C_0

	endm

xor	macro   dest,srcA,srcB

	andxor	dest,C_n1,srcA,srcB

	endm

not	macro	 dest,src

	andxor   dest,src,C_n1,C_n1		

	endm

nand	macro	dest,srcA,srcB	

	andxor	dest,srcA,srcB,C_n1

	endm

or	macro	 dest,srcA,srcB

	not	 C_0,srcA

	andxor	 dest,ACCUM,srcA,srcB	

	endm	

nor	macro	dest,srcA,scrB

	not	dest,srcA

	andxor	dest,srcB,dest,srcA	

	not	dest,dest

	endm

neg     macro   dest,src

	macs1   dest,C_0,C_1,C_nmax 	

	endm	

;;; branch on:

;;; ==0

beq	macro   count

	skip	CCR,CCR,C_8,count	

	endm

;;; !=0

bne	macro	count

	skip	CCR,CCR,C_256,count

	endm

;;; <0

blt	macro	count

	skip	CCR,CCR,C_4,count

	endm

;;; always branch

bra	macro	count

	skip	C_0,C_max,C_max,count

	endm

;;; on saturation

bsa     macro count

	skip CCR,CCR,C_16,count

	endm

bge	macro  count

C___80	con $80

	skip CCR,CCR,C___80,count	

	endm

bgt	macro	count

C___180	con $180

	skip CCR,CCR,C___180,count

	endm

move	macro dest,src

	macs  dest,src,C_0,C_0

	endm	 	

	end

;;; usefull for testing values before a skip

test	macro test

	macs C_0,test,C_0,C_0

	endm

cmp	macro src1.scr2

	macints C_0,src1,C_n1,src2

	endm