Block Diagram - Sharp mz-800 Technical Reference And User's Manual

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!17.73 MHz
0
=
3.547 MHz
CPU
~
"
,_ E
_l
~
Option 16 KB
RESET
GDG
VRAM ADR. BUS
VRAM
16 KB
VRAM DATA BUS
~
~
I
~,,.
••
IC
: ; '
VRA5
WE
CAS
ADDRESS BUS
J
DATA BUS
ICJ
~11
CONTROL BUS
L _
r-
.._
Peripheral
VO
bus
r===Jn
I
1
•,1 C~~T
Ogj
L...-.r
8253
h
n
.,
"'
.0
J
J
..i.l~
c:
.~
.,
c:
.,
c.
X
w
v
~
Z-80A
L--------:---11-><
OSCI Cursor
556
KEY
DATA
PA
8255
I
PlO
OUT2~------;PA5
.!1
.,
>-
0
PBI
PRINTER DATA
BLJS~
\0
CTRL BUS
~
-,
~/"""'
PC21
I
I
I
t---
I~
~ ~"
~
KEY
STROBE
r
:BOAR~
J
w
AMP
DATA
RECORDER
PA'
~f)II.__L___.____:.
l~~
~~
System switch
.)J
(MZ -
Centronics)
VBLN--fPA4
SP
External
printer
bus
I\)
D:l
0
0
';11:"
c.
CO
...
I))
3

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