ZiLOG ZDS-1 Series User Manual page 2

For Hardware Development
The ZDS-1 Series provide the tools necessary for the designer to easily debug and test 280 and Z80A Micro-
processor-based hardware. Functions normally supplied by many pieces of special purpose design equipment
are integrated in by the ZDS-1 Series Development Systems.
c
As
an
Emulator
the Development System connects
directly to the prototype system and behaves like the 280
or Z80A Microprocessor, only under direct control of the
user, to enable:
Setting or resetting of all registers and RAM memory
locations.
9
Setting or resetting of interrupt controls.
*
Single or multiple instruction stepping.
Setting or displaying of 1 1 0 Port information.
Start/Stop control of program execution.
As
a Logic Analyzer
the Development System mon-
itors and stores pertinent CPU bus activity and terminates
program execution in an orderly manner when user defined
events occur. Some examples are:
Storage of address, data and control bus information
during each bus transaction.
Storage of only user defined bus transactions; e.g.
Memory read, I/O write.
Suspension of program execution on occurance of a
user defined event.
Display a history of the last n bus events, where n
equals from one through 256 events.
As a ROM1RA.M Simulator
the Development System
lends its memory to the user's prototype system with the
memory mapping features.
Memory Mapping allows the user to describe the phys-
ical nature of the memory to be used by the proto-
type system. A memory map is defined by the user to
specify which addresses exist in the prototype and
which address locations are to be "borrowed" from
the Development System.
The ZDS-1/40 Development System also permits mem-
ory address to be declared write protected or non-
existent so that if any access is attempted a break in
program execution will occur.
As
a
PROM/EPROM
Programmer
the Development
System provides the functions necessary to write, read, ver-
ify and duplicate PROMS. This is an optional feature pro-
vided by the ZDS/PPB and ZDS/PPB/16 PROM Programmer
Option, or ZDS/CIB Printer and Prolog PROM Programmer
Interface.