Sharp MZ-80B User Manual

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

Sharp MZ-80B Specifications

General

Brand	Sharp
Model	MZ-80B
Category	Desktop
Language	English