HP Vectra - Page 23

Preface16

Hp Vectra Overview18

System Design Overview18

System Components19

Specifications and Environment20

Specifications and Environment21

Processor Board24

Memory27

80286 Processor30

System Performance32

Wait-State Generation34

System Timers/Counters35

System Interrupts37

DMA Controller40

DMA Port Assignments43

Backplane I/O45

62-Pin Connector Assignments47

I/O Address Map54

Speaker56

P4 Speaker/Keylock Connector56

Attachment Connectors57

CMOS RAM Memory Map60

Flexible Disc Controller Subsystem61

Keyboard Controller72

HP-HIL Interface74

Keyboard Connector Pin Assignments75

Adapter-To-System Hardware98

HP45981A-To-System Pin Assignments100

Composite Video Connector (J2) Pin Assignments101

Character Generator ROM102

Color Adapter Connector (P3) Pin Assignments102

RAM Access103

SPU Access and Display Access104

Modes of Operation105

6845 CRT Controller107

98 Multi-Mode Video Adapter Card115

Numeric Coprocessor116

Real-Address Operating Mode116

Hardware Interface117

Protected Mode117

Capability Extensions118

Hard Disc Controller Subsystem126

Clock Cycles133

Switches133

Serial/Parallel Card138

Serial Portion of the Card139

Interrupt Priority145

Parallel Portion of the Card151

Parallel Port Pin Assignments153

HP24542D Parallel Cable Pin Assignments157

Schematics158

Mb Memory Expansion Card158

Processor Board158

Processor Extension Card158

Serial/Parallel Adapter Card193

HP Vectra - Page 23

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