Intel 81342 Developer's Manual page 74

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2 . 2 . 2 . 2
O u t b o u n d A d d r e s s T r a n s l a t i o n W i n d o w s
I n b o u n d t r a n s l a t i o n i n v o l v e s a p r o g r a m m a b l e i n b o u n d t r a n s l a t i o n w i n d o w c o n s i s t i n g o f
a b a s e a n d l i m i t r e g i s t e r a n d a v a l u e r e g i s t e r f o r P C I t o i n t e r n a l b u s t r a n s l a t i o n . T h e
o u t b o u n d a d d r e s s t r a n s l a t i o n w i n d o w s u s e a s i m i l a r m e t h o d o l o g y e x c e p t t h a t t h e
o u t b o u n d t r a n s l a t i o n w i n d o w l i m i t s i z e s a r e f i x e d i n t h e 8 1 3 4 1 a n d 8 1 3 4 2 i n t e r n a l b u s
a d d r e s s s p a c e ; t h i s r e m o v e s t h e n e e d f o r s e p a r a t e l i m i t r e g i s t e r s .
F i g u r e 8 o n p a g e 7 4
F i g u r e 8 .
O u t b o u n d A d d r e s s T r a n s l a t i o n W i n d o w s
6 4 K b y t e s
4 G b y t e s
N o t e : B e f o r e E n a b l i n g O u t b o u n d t r a n s a c t i o n s i n t h e A T U C R , d e f a u l t b a s e
l o c a t i o n s f o r M e m o r y T r a n s a c t i o n s c a n b e c h a n g e d i n O U M B A R [ 0 : 3 ] .
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I n t e l
8 1 3 4 1 a n d 8 1 3 4 2 I / O P r o c e s s o r s
D e v e l o p e r ' s M a n u a l
7 4
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I n t e l
i l l u s t r a t e s t h e f i v e o u t b o u n d a d d r e s s t r a n s l a t i o n w i n d o w s .
0 0 0 0 0 0 0 0 0 H
C o d e / D a t a
E x t e r n a l M e m o r y
0 F F F A F F F F H
0 F F F B 0 0 0 0 H
I / O W i n d o w
0 F F F B F F F F H
1 0 0 0 0 0 0 0 0 H
M e m o r y W i n d o w 0
1 F F F F F F F F H
2 0 0 0 0 0 0 0 0 H
M e m o r y W i n d o w 1
2 F F F F F F F F H
3 0 0 0 0 0 0 0 0 H
M e m o r y W i n d o w 2
3 F F F F F F F F H
4 0 0 0 0 0 0 0 0 H
M e m o r y W i n d o w 3
4 F F F F F F F F H
8 1 3 4 1 a n d 8 1 3 4 2 — A d d r e s s T r a n s l a t i o n U n i t ( P C I - X )
O u t b o u n d I / O C y c l e
T r a n s l a t i o n W i n d o w
O u t b o u n d M e m o r y
T r a n s l a t i o n W i n d o w s
O r d e r N u m b e r : 3 1 5 0 3 7 - 0 0 2 U S
A T U
( D e f a u l t )
A T U
( D e f a u l t )
B 6 3 2 5 - 0 1
D e c e m b e r 2 0 0 7

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