Victor 9000 User Manual

The keyboard communicates with the CPU over a 7 wire
cable connected at J6~ The required +5 volts is provided by
the cable.
The keyboard interface acknowledges the request by the ·
keyboard to transfer .in a character with an acknowledge
control signal. When the char~cter is received by the
keyboard interface, it.will generate an interrupt to the
8088 microprocessor and the 8088 will enter an interrupt
service routine to transfer the character into memory.
CRT MODULE
The CRT module consists of a 12" CRT and yoke
assembly, a video control board, and a video interface
board. A regulated +12 volt power is provided to the
display subsystem by the power supply in ~he mainframe
unit.
CPU SOARD
VIDEO CONTROL
BRIGHT
BOARD
CONTRQL
VIDEO
BllT
INTERFACE
J BRIGHT
(D YERTtCAL IRVE
• C_.K.T
SYNC
BOARD
~
@ HORIZOllTAL DRIVE
DRIVE
WAT
llORIZ
~~
~
.l
VlDIEO
I VIDEO
I
CRT
1
AMPL
-•
VIDEO
DRIVE
+1av
IOOY..
~
PGWIR
'OCUS-
CRT DISPLAY SYSTEM BLOCK DIAGRAM
Figure 2
2-2

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