Xycom XVME-100 Manual page 19

X V M E - 1 0 0 M a n u a l
March, 1987
2.4.2 A d d r e s s M o d i f i e r D e c o d e
The a d d r e s s m o d i f i e r d e c o d e u s e s t h r e e j u m p e r s f o r e a c h b a n k ( 6 t o t a l ) . B o t h
banks r e s i d e i n t h e s t a n d a r d A 2 4 address space. T h e f i r s t j u m p e r i s t h e s u p e r v i s o r
select, w h e n t h e j u m p e r i s i n , t h e b a n k w i l l r e s p o n d o n l y t o s u p e r v i s o r accesses,
when t h e j u m p e r i s o u t , t h e b a n k w i l l r e s p o n d t o s u p e r v i s o r a n d n o n - p r i v i l e g e d
accesses. D u r i n g e a c h a c c e s s o f a b a n k , t h a t b a n k ' s L E D ( g r e e n ) o n t h e f r o n t
panel, w i l l m o m e n t a r i l y l i g h t .
The s e c o n d j u m p e r i s t h e d a t a s p a c e select, w h e n t h i s j u m p e r i s i n , t h e b a n k w i l l
respond t o d a t a accesses, w h e n o u t , t h e b a n k w o n ' t respond t o d a t a accesses.
The t h i r d j u m p e r i s t h e p r o g r a m s p a c e select, w h e n t h e j u m p e r i s i l l , t h e m o d u l e
w i l l r e s p o n d t o p r o g r a m accesses, w h e n o u t , t h e m o d u l e w o n ' t r e s p o n d t o p r o g r a m
accesses.
Ta b l e 2-3 l i s t s these t h r e e j u m p e r s a n d t h e i r d e f i n i t i o n s .
B A N K 1
Jumpers
J13 I n *
J 13 O u t
J11 I n *
J11 O u t
J 10 I n *
J10 O u t
B A N K 2
Jumpers
J15 I n *
J15 O u t
J9 I n *
J9 O u t
J12 I n *
J12 O u t
* = F a c t o r y s h i p p e d c o n f i g u r a t i o n
Ta b l e 2-3. A d d r e s s M o d i f i e r J u m p e r s
Description
Supervisor O n l y A M 2 = I
Supervisor & N o n - p r i v i l e g e d A M 2 = d o n ' t care
Data Access R e s p o n d s t o A d d r e s s M o d i f i e r codes
No D a t a Access W o n ' t respond t o 3 D I I o r 391-1
Program Access 3 E H o r 3 A 1 l
No P r o g r a m Access W o n ' t respond t o 3 E H o r 3A11
Description
Supervisor O n l y A M 2 = 1
Supervisor & N o n - p r i v i l e g e d A M 2 = d o n ' t care
Data Access R e s p o n d s t o A d d r e s s M o d i f i e r codes
No D a t a Access W o n ' t respond t o 3 D H o r 391-1
Program Access 3 E 11 o r 3 A H
No P r o g r a m Access W o n ' t respond t o 3E11 o r 3 A l l
2-10
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