ZiLOG ZDS-1 Series User Manual page 8

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ZDS-1/25 2.5 MHz D,
.
elopment S, ,tern
The ZDS-1/25 Development System is a low cost standalone development system used with the 2 8 0 CPU
for prototype development of systems employing clock rates not exceeding 2.5MHz. This system provides a
standalone microcomputer with dual floppy discs, optional peripherals and interfaces to assist the user in the
software and hardware development activity of a Z80-based system. Two modes of operation are provided to
accomplish this: User Mode and Monitor Mode. In Monitor Mode the system enables the user to utilize the
RIO operating system to develop, edit and modify his software. In User Mode, the system memory and peri-
pheral devices may partially or totally be allocated to the prototype system, with the exception of I/O ports
EQ)H through EFH. This enables the user to execute his program in a real time environment.
Features
6% bytes of
RAM
memory.
3K PROM Monitor Program with 1K of ded-
icated Monitor Scratch pad area,
Programmable Hardware Breakpoint Module
enabling the suspension of instruction ex-
ecution at a given address or activity (Mem-
ory or 110). Programmable Real Time Stor-
age Module to store CPU activity (address,
data and control bus), for up to 256 events,
to monitor memory or I/O Port activity.
In-circuit emulator with three foot connec-
tion mble to user system.
Memory mapping to describe the nature of
the memory used, either user or ZDS mem-
ory. Mapping occurs using blocks contain-
ing 256 bytes each.
Dual Moppy disc drives having a combined storage cap-
acity of 600,000 bytes
N O operating system providing a combination of a
Text Editor, Assembler, Linker and ZDOSII File Man-
agement System.