Texas Instruments 990 Manual page 8
Video display terminal
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Also See for 990:
- Operation manual (276 pages) ,
- User manual (274 pages) ,
- Installation and operation manual (122 pages)
Table of Contents
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LIST OF ILLUSTRATIONS (Continued)
Figure
Title
Page
1-31
Model 911 VDT Controller Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-49
1-32
Video Line Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-51
1-33
Model 911 VDT
Built~In
Test Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-51
1-34
Model 911 VDT Keyboard Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-53
1-35
Keyboard Logic Flowcharts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-54
1-36
CRU Interface Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-55
1-37
Refresh Memory Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-60
1-38
Refresh Memory Data Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-63
1-39
Memory Read and Write Control Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-65
1-40
Memory Addressing Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-67
1-41
Flowchart for Memory Write Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-69
1-42
Flowchart for Memory Read Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-70
1-43
Display Screen Refresh Cycle Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-71
1-44
Video Output Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-73
1-45
Model 911 VDT Character Matrix Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-75
1-46
Model 911 VDT Displayed United States Character Set, Including Graphics Symbols . . . . . . . . . 1-7 6
1-47
Model 911 VDT International Displayed Character Set. . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-78
148
Model 911 VDT Alarm Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
l-79
1-49
Model 911 Video Display Controller Time Base Generator Oscillator and Dot Clock . . . . . . . . .1-81
1-50
Model 911 VDT Time Base Generator Character Synchronization Logic . . . . . . . . . . . . . . . . .1-83
1-51
Model 911 VDT Dot Counter Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-85
1-52
Model 911VDT960-Character Display Character Address Counting Scheme . . . . . . . . . . . . . .1-86
1-53
Model 911 VDT 1920-Character Display Character Address Counting Scheme . . . . . . . . . . . . .1-87
1-54
Model 911 VDT Sync Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-91
2-1
Model 990 Computer Hot Mock-Up System for 60-Hertz Model 911 VDT Testing . . . . . . . . . . . 2-2
2-2
Model 990 Computer Hot Mock-Up System for 50-Hertz Model 911 VDT Testing . . . . . . . . . . . 2-3
2-3
CD Verb Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
2-4
United Kingdom Model 911 VDT Keyboard Matrix Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
2-5
VDT Controller Assembly Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
2-6
CRU Interface Waveforms During Exercise by the CD-C Verb . . . . . . . . . . . . . . . . . . . . . . . . 2-23
2-7
Timer Signal Relationships . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26
2-8
Alarm Signal Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-29
2-9
Model 911 VDT Controller Keyboard Logic Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . 2-31
2-10
CRT Monitor Schematic Diagram, Source 1 (M3960-392/-393) . . . . . . . . . . . . . . . . . . . . . . . 2-39
2-11
CRT Monitor Schematic Diagram, Source 2 (TV120/-0200133) . . . . . . . . . . . . . . . . . . . . . . . 2-41
2-12
CRT Monitor Schematic Diagram, Source 3 (D12 Series) . . . . . . . . . . . . . . . . . . . . . . . . . . .
243
Table
1-1
1-2
1-3
1-4
L!ST OF TA.BLES
Title
Page
Model 911 VDT Built-In Test Signals With CRU Output Bit 9 = 1 and
CRU Output Bit F
16
=
0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-15
Model 911 VDT Built-In Test Keyboard Simulation Data . . . . . . . . . . . . . . . . . . . . . . . . . . .1-16
Model 911 VDT Power/Logic PWB-to-CRT Monitor Interface Signal Characteristics . . . . . . . . . .1-22
Contact Matrix Connections and Associated Diodes for United States and European
Model 911 VDT Keyboards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-28
viii
Digital Systems Division
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