North Star ZPB-A Manual

NORTH STAR
*
COMPUTERS,
INc.
2547 Ninth Street· Berkeley, California 94710 • (415) 549-0858
North Star
Z80A PROCESSOR BOARD ZPB-A
Contents
Cautions • . . . • . . . . • . • • 2
Introduction . . . • . . . . • • • 3
Limited Warranty . • . . . . . • . 4
Out of Warranty Repair . . . . . • • • 4
ZBP-A Parts List . • • • • • . • . 5
PROM Option Parts List . • • • 6
Assembly Information . • . . . • • . . . . 7
Figure lA: Component Identification . 10
ZPB Assembly • . • . . . . • • . . . . 11
ZBP Board Checkout • . • . . . • . . . 15
PROM Option Assembly and Checkout . . . . 20
Configuration Options . • . . . . • . 21
Theory of Operation • . . . • . . • • 24
Appendix 1: Pulse Signal Detection . . • . 28
Appendix 2: S-100 Bus Signals . . • . 29
Assembly Figures . . . • . . . • . . • • . 30
Schematic Drawings . • . . . . . . . . 31
Copyright 1977, North Star Computers, Inc.
REVISION 3