Bally 5000 Plus, Manual

Page: 193 / 388

C i r cu i t Descr i pt i on ( cont ' d )
B i -d l r e c t i on a l Por t s
5 VDC B I -d l r e c t l ona l ( Ree l
Mech a n i sm ) Por t s
T h e b l -d l r e c t l on a l r ee l mec h a n i sm
por t s a r e a d d r e s s e d a s wor d s .
Por t
6 , 8
7 , 9 , B
Bu f f e r C h i p
E 5
E 3
T o t r a n s f e r d a t a , t he bu f f e r c h i ps
( E 3 & E 5 ) need ( 1 ) and S E L 2
s i gna l s s i mu l t aneous l y and ( 2 )
a c t i ve LOW WR I T E s i gn a l t o wr i t e
d a t a o r a c t i ve H I GH WR I TE s i gna l t o
r e a d d a t a .
T h e WP o r R P E s t r obe S i gna l s , go i ng
t o t he se l e c t e d po r t on t he r ee l
con t r o l boa r d , l a t c h e s t he p r esent
I nput d a t a t o t he out pu t d a t a .
T h e d a t a r ema i ns
r eset o r a no t he r
s i gna l I s s e n t .
l a t c h e d
- -
WP o r R P E
un t I I a
s t r obe
Por t Wr i t e R e a d
6 WP8 R P E 7 / R P E 8
8
WP 1 0 R P E9/R P E 1 0
7 WP7 R P E 7 / R P E 8
9 WP9 R P E 9/ RP E 1 0
B WP 1 1 R P E 1 1
4 . I /O BOARD
NOT E S
4 - 2 5