Bally 5000 Plus, Manual

Page: 66 / 388

68000 M i c ro p r ocesso r ( con t ' d )
A b y t e con t a i ns 8 b i t s . T h e l owe r
b y t e cons i s t s o f t he d a t a l i ne s
( 00-07 ) wh i ch a r e se l e c t e d by t he
LOS . A l owe r b y t e t r an s f e r s d a t a
on l y w i t h odd a d d r e s s i ng .
The upper b y t e cons i s t s o f t he da t a
l i ne s ( 08-0 1 5 ) wh i c h a r e se l e c t ed
b y t he UOS . An uppe r b y t e
t r an s f e r s d a t a on l y w i t h even
a d d r e s s i ng . ( F i g . 3-2 )
A D D R E S S B U S
CS
( CHI P SELECT )
O D D A D D R E S S
• . Q
0001
- 0003
0005
21
26 A
2
01
06
LOWER BYTE
00 " 0 7
23
2 1
24
25
1 9
3
01
18
06
4
11 5
05
16
04
6
15
1
03
13
8
02
IZ
01
9
I I
10
D O
8 bi t s =
B Y T E
01 06 05 04 03 OZ 01 oa
BYTE
A
A
I
UOS
015
DI.
UPPER BYTE
08 · 0 1 5
F i g . 3-2
3 .
M P U BOARD
NOT E S
E V E N A D D R E S S
•.
Q . OOOO - 0002
0004
21
26
22
Or
2
23
2 1
24
25
19
3 A
18
4
11 5
16
6
15
1
13 8
IZ
9
I I 10
8 b i t s
=
BY T E
015 014 01 3 olZ 011 010 09 08
b i l b l l b i l b , ' b , l b , l b i l b , l
B Y T E
3-9