Bally 5000 Plus, Manual

Page: 86 / 388

C i r cu i t Descr i pt i on ( cont ' d )
U 1 01
uses t he
per i phe r a l
I n ter rupt s i gna l , l ACK , and t he
addr ess s i gna l to
de term i ne
whe t he r t he ch i p I s a 6800 or a
68000 .
6800 : U 1 01 sends a VPA to t he
m i c roprocessor wh i ch sees an
auto vector numbe r and t he
cor respond I ng I nst ruct I on
process beg i ns .
68000 : U 1 01 sends a ver i f i ed l ACK
s i gna I to t h e ch I p . The
ch i p sends I t s user vector
numbe r
by t he data bus l i nes
( 0 0-07 )
to t he
m i crop rocessor .
A
DTACK
s i gna l I s a l so sent to t he
CPU ( U 1 p i n 1 0 ) .
NOT ES
3 . �PU BOARD
SEL ECTOR/ I NTERRUPT D I AGRAM
... . c
I I
( E-874
- 1 0 )
1 8 L 4
u • • r ,
U l 0 l
is
CiPiii
Vi010iNT
Ciffi'i
VTi'1
Viii
iii'TC'i'Hr
fliTrTI �
Li"V£l7
�
"
20
1 0 I '
F i g .
3- 1 0
3-29