ZiLOG ZDS-1 Series User Manual page 5

Features
Z80A-CPU-The 4MHz version of the powerful Z80
micro-processor.
110 Ports-The user may have access to all I/O Ports when
in User Mode and User Clock is selected.
.
Main Memory-Capacity of up to 60K bytes on a single
board, allowing more room for I/O options. Standard
system includes 60K bytes.
Floppy Disc Drives-Each providing for the storage of up
to 300,000 bytes on an inexpensive, removable diskette.
RIO Operating System-With Relocating Assembler, Link-
er, Text Editor and Logical File Structure.
Real-Time Storage Module-Enables the monitoring of
specific address, data and control bus lines during selected
operations, e.g. Memory Read, Memory Write, 110 Read,
110 Write.
Breakpoint Module-Enables the monitoring and testing
of specific address, data and control bus states to stop
program execution or to create a scope sync.
Memory Mapper-Enables the user to describe the phys-
ical nature of the memory to be used. The user may util-
ize the memory in the Development System, his own sys-
tem or a combination of both in blocks of 1024 bytes.
In addition each block may be assigned properties of be-
ing nonexistent or write protected to aid in the debug
and development of the prototype system.
Memory Address Translator-Is an additional feature
provided with the Memory Mapper. It enables a block
(1024 bytes) of memory in the user system to be phys-
ically located at a different address in the Development
System.
.
User Clock Integrity-is verified to insure the clock sup-
plied by the user does not fall below 250KHz.
Refresh-will always occur even when emulation is sus-
pended, to maintain data integrity if dynamic RAM'S
are employed.
CPU
Standard Z80-CPU and Z80A-CPU Emulator.
Memory
3K bytes ROM/lK bytes static RAM dedicated to system
monitor; 60K bytes general purpose RAM.
System Clock
Crystal controlled at 2.5 MHz
AC Power Requirement
50160 Hz, 115 VAC, 200 Watts; optional 230 VAC Pow-
er Supply.
Environmental Characteristics
Operating Temperature: 0' to 5 0 ' ~ .
Physical Characteristics
Two separate chassis. One contains the disk drives and
power supplies, whle the other contains all other ele-
ments.
Approximate Weights and Dimensions
Apply to both chassis:
Size: 19"W
x
9"H x 15"D
Weight: 35 lbs.
Electrical
Integral Power Supplies provide all necessary voltages,
plus 4 amps of +5V (55%) is available in the CPU chassis
for user cards.