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Zenith Z-100 Series Technical Manual
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Table of Contents
Default Chapter
4
Table of Contents
4
Chapter 1 General Information
8
Introduction
8
System Description
9
Circuit
11
Disassembly
14
Card Removal
16
Programming
38
Description
39
User Options and Jumpers
41
Programming Information
44
Theory of Operation
58
Theory of Operation
59
Circuit Description 2
61
Semiconductor Identification
133
Circuit Board X-Ray View
174
Interconnect Pin Definitions
178
Power Supply Connectors
184
Description
185
User Options and Programming
185
Chapter 3 Keyboard Encoder Description
185
Command Summary
190
Theory of Operation
192
Theory of Operation
193
Keyboard Scan Matrix
195
Encoder Output Codes
196
Keyboard Key Layout
203
Chapter 4 Video Logic Board Description
204
Description
205
User Options and Jumpers
208
Contrast Control
209
Theory of Operation
210
Theory of Operation
211
Video Ram
232
Programming Data
239
Circuit Description
258
Parts List
280
Semiconductor Indentification
282
Circuit Board X-Ray View
316
Interconnect Pin Definitions
319
Chapter 5
324
Circuit Description
324
Troubleshooting
326
Recalibration
329
Parts List
332
Circuit Board X-Ray View
338
Chapter 6 Floppy Disk Controller Description
338
Description
339
User Options
340
Other Options
343
Programming Data
344
Drive Interface Connectors
350
Block Diagram
355
Theory of Operation
360
Circuit Description
362
Drive Interfaces
369
Troubleshooting
371
Troubleshooting Chart
372
Calibration
373
Circuit Board X-Ray View
389
Interconnect Pin and Signal Definitions
392
Chapter 7
398
Description
398
Programming
399
Cable Connections
401
Operation
402
Chapter 8 Power Supply Power Line Considerations
405
Power Line Considerations
406
Specifications
407
Power Supply
405
Chapter 9
420
Cables Location/Description
420
Chapter 2
428
Description
428
General Information
429
Memory Mapping
432
Chapter 10 Description General Information
436
Devices Permitting User Programming
436
Port Addresses
437
Z-DOS Initialization Sequence
440
ASCII Chart
456
Escape Codes
464
Key Code Chart
478
Keypad Code Chart
485
Function Key Code Chart
486
Definitions
488
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User Manual
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Zenith Z-100 Series Specifications
General
CPU
Intel 8088
Release Year
1982
CPU Speed
4.77 MHz
Storage
One or two 5.25-inch floppy drives, optional hard drive
Ports
Serial, parallel
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