Vector 4 - Page 18

VECTOR 4
TECHNICAL INFORMATION
SECTION I - SPECIFICATIONS OF SYSTEMS
Summary: This section gives the Port Assignments, chip specifications
and power requirements along with other information about all nine
Vector 4 Systems: CPU, RAM/PROM Memory, Video, Keyboard, I/0,
CRT, Disk Controller, Disk Drives, Power Supply.
CPU
The Z80B and 8088-2 CPUs can be individually selected through the use of Port 0CH
and Port 0DH.
Z80B Data Lines 8
Address Lines 16
Instructions 158 (including 8080 instructions)
Clock Speed 5.1 MHz
Power Supply + V
8088-2 Data Lines | 8
Address Lines 20
Instructions 235
Clock Speed 5.1 MHz
Power Supply +5 V
- Clock Signals- 32.640 MHz oscillator generates a signal which is used directly by the
Video (Dot Clock) and other subsystems. The oscillator signal is also divided so that the
resultant signal(s) can be used to clock I/O funetions along with sequencing other
subsystem components.
RAM/PROM MEMORY
PROM-
One
4
K
2732
(or
a
8
K
2764)
that
is
used
for
the
Executive
system
program
and
two
4
K
2732s
which
house
the
Character
Generators.
2732
(or 2764) Addressed from 0000H to OFFFH. This 8 K block is enabled/disabled
through use of Port 02H or 03H. PROM is enabled (RAM disabled) when
bit "0" is 0 and is disabled (RAM enabled) when bit "0" is 1.
2732 Used as Character Generators for the standard alphanumeric mode.
09-01-82 | 7200-0001 [ 1-1