Victor 9000 User Manual

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TABLE OF CONTENTS
VICTOR 9000 BUSINESS COMPUTER
INTRODUCTION.. • • • • • • • • • • • • . • • • • • • • • • • • • • • • • • • • 1. 0
HARDWARE CONFIGURATION ••••••••••.•.••..••.•.•. 2.0
SECTION THREE ••••• THEORY OF OPERATION
POWER SUPPLY •••••••••••••••••••••••••••••••••• 3.1
VIDEO CONTROL BOARD .•.•..•....••••.••..••..... 3.2
DISK DRIVE CONTROLLER .•••••..••....•••••••.... 3.3
SEEK LOGIC.............................. 3.3.1
MOTORSPEED LOGIC ......•..••.....•.•..•.. 3.3.2
WRITE LOGIC ..•••.•••••.•••••...••....••• 3.3.3
READ RECOVERY LOGIC ••....•.••.•.••..•..• 3.3.4
CENTRAL PROCESSOR BOARD ••....•...•.•••••......
8088 MICROPROCESSOR CHIP .......•.......•
MASTER BUS CONTROL •••.••.•........••••••
MASTER CLOCKS AND RESET •••••.......•....
BOOT ROM (READ ONLY MEMORY) ....•.....•..
SCREEN MEMORY ••...•...•.•••••.......••..
SYSTEM MEMORY •.••..•...............•.•.•
SYSTEM MEMORY TIMING •••.•...•..••..•.•••
INTERRUPT PROCESSING .............•....••
KEYBOARD I NTE RF A CE .•.••..••••••.•.•.••••
CRT CONTROLLER CHIP ..••.........•••.•...
CRT INTERFACE •••••••••.•..••..••••....••
REAL TIME CLOCK •.•••••....••......•.•••.
PARALLEL PO RT ....•...•.........••.....••
SERIAL PORTS •••••••••••..•.••.•••....•••
USER PORT • •••••••••••••••••••.•••••• I •••
CODEC •••••••••••••••••••••••••••••••••••
EXPANSION BUS ..•••••••.••.... I ••••••••••
3.4
3. 4. 1
3.4.2
3.4.3
3.4.4
3.4.5
3.4.6
3.4.7
3.4.8
3.4.9
3.4.10
3.4.11
3.4.12
3.4.13
3.4.14
3.4.15
3.4.16
3.4.17
KEYBOARD MODULE .•.•.......•......•.•.......••• 3.5
128K MEMORY EXPANSION BOARD .•.•••....••....••. 3.6
384K MEMORY EXPANSION BOARD .....•..••.....••.• 3.7
DISK DRIVE ASSEMBLY ••.... ~···················· 3.8
I

Victor 9000 Specifications

General

Processor	Intel 8088
Clock Speed	4.77 MHz
RAM	128 KB, expandable to 896 KB
Operating System	MS-DOS
Floppy Drive Capacity	1.2 MB per drive
Display	Built-in monochrome display
Text Resolution	80 x 25 characters
Graphics Resolution	800 x 400 pixels
Ports	Parallel, serial, video output