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SCHOTTKY BIPOLAR 8228
DATA
BUS
INTA
MEMR
MEM
W CONTROL
BUS
I/O
R
I/OW
3
CONTROL
BUSEN
__
....
22
a
_ 18
WRn-------.....,
DBINt-=-1.:....7----..-----,
HDLA
~2;.;.1
~_--.
8080A
°O~10~~-I
CPU
011-9--l~-I
°2~8--l~~
.....
0
3
1-7--l~-I
0
4
1-3--l~-I
°51-4--l~-I
0
6
.-5--l~~-I
0
7
.-6--l~~-I
....
_-----
(FROM 8224)
STATUSSTROBE--...c1II
STATUSWORD
CHART
TYPE OF
MACHINE
CYCLE
I
STATUSWORD
DO
INTA
o 0 0 0 0 0 0 1 0 1
WO
STACK
HLTA
OUT
1 1 0 1 0 1 0 1 1 1
o 0 0 1 1 0 0 0 0 0
o 0 0 0 0 0 0 0 1 1
o 0 0 0 0 0 1 0 0 0
05
INP
1 0 0 0 0 0 0 1 0 1
o 0 0 0 0 1 0 0 0 0
MEMR
1 1 0 1 0 0 0 0 1 0
---
INTA
L..--
(NONE)
INTA
~------
I/O W
'------------
I/O R
'--------------
MEM
W
L...--
MEM
R
'------------------
MEM
W
L....-
MEM
R
'--------------------
MEM
R
_ CONTROL
SIGNALS
5-9