Xerox Alto I User Manual

RSEL[O·2] ---~ .... ~
~
RSEL[3·4] ~ M
IR[1·2]
. ~ P I--~
IR[3.4] ~ x
---
LOADT
r--
P
I--
ALUF[O·3] ~
R
6
0
SKIP ~
M
---
LOADL
3
SBANK ---,
L
RSEL -.-
t
R S
4
~
8x
32x 16 32x 16
"
"
L
t ~
j
1 ..
MPX
I
t
I
.....
T
I
I
t
A B
ALU
F
,
I
.... .1
L
M I
I
Shifter I
5
RSEL -4 Constant
3
ROM
BS -4
256 x 16
Processor
, .
Bus
,
IR
- ALU Bus
MAR
Memory
Address
Bus
II
16
Decode
&
Control
Figure 1
-- Processor Data Paths
Monitor
Transceiver
I
Drive
I
I I
I
I
Display
Ethernet
Control
I
Control·
I
I'
f'
I
Disk
Control
f'
I II
W
,
I'
16
\11
Drivers
&
--- ..
Parity
•
•
I~
•
-
•
Memory
J
- - Mous
e
Data Bus
I--
U
- - Keybo
ard
N
32
K
,It
-
Main
Memory
4x64Kx 16 + 7
Error Corrected
DynamicMOS
t
- - Keyse
t

Xerox Alto I Specifications

General

Brand	Xerox
Model	Alto I
Category	Desktop
Language	English