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Sharp MZ-80B - Page 7

Sharp MZ-80B
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3.2 Setting
option
device interface cards in
the
expansion
1/0
port
. . . . . . . . 37
3.2.1 Setting
the
Graphic Memory 2 Card . . . . . . . . . . . . . . . . . . . . . . . 37
3.2.2
Other interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Chapter
4
Hardware
Configuration
of
the
MZ-808
. . . . . . . . . . . . . . . . . . . . . . 39
4.1 The
MZ-80B system diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
40
4.2 Memory configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
42
4.2. 1
4.2.2
Memory map for initial program loading state
..............
.
Memory map for normal state
..
..
......................
.
42
43
4.2.3 Memory map for V-RAM accessing state . . . . . . . . . . . . . . . . . . .
44
4.3 Signal system for
the
8255 block,
the
8253 block and
the
IPO block . . . 48
4.3.1 Signal system for
the
8255 block . . .
..
. . . . . . . . . . . . . . . . . . . . . 49
4.3.2 Signal system for
the
8253 block . . . . . . . . . . . . . . . . . . . . . . . . .
51
4.3.3 Signal system for
the
Z80A-PIO block . . . . . . . . . . . . . . . . . . . . . 52
4.4 The
MZ-80B circuit diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
APPENDIX
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
A.l
Z80A-CPU technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
A.2 Z80A-PIO technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
A.3 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
A.4 Caring for
the
system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
SUPPLEMENT
Complete
MZ-808
IPL Assembly Listing
vi

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