Vector
Graphic
48K
Dynamic
RAM
Rnn~~
TABLE OF CONTENTS
Section
rrable
of
Contents.
.............................
1.
Introduction
•.
1.1
1.2
Description
Description
of
of
the
Board
•••
this
Manual.
••.•
1
••••
2
. 2
••
2
II.
Theory
of
Operation
.................................
3
2.1
2.2
The
The
Circuitry
•••..••.••.••••.
48K
Board
Refresh
Feature
of
the
Z-80
Board
•..
••
3
. • •4
III.
User's
Guicle...................................
.6
IV.
V.
VI.
3.1
3.2
3.3
3.4
3.5
Modifications
to
the
48K
Board
Z-80
Board
•••••.•.••..••
The
3.1.
1
3.1.
2
READY
Refresh
Signal.
Reset
Circuitry.
Li
ne
•••••••
Using
D~lA
.......
II
......
Address
of
the
Board.
Memory
Test.
.........
Spec:.fications
.•••••
Memory
Chip
Locations
•.
Schematic
•••.••••••••••
nevision
2
1/
12
/78
and
the
.6
.6
'7
.8
.8
• • • 8
.8
..10
.11
••
12
1
