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Note: Model names may vary between U.S. and German catalogs and price lists.

MCZ-1 Systems
Model Description
PDS 1/01 Beschreibung 4 slot card cage, MCB, MDC, one (1) floppy drive
Separate board- and floppy enclosure
Two (2) free slots for expansion cards.
MCZ 1/05 Beschreibung 4 slot card cage, MCB, MDC, one (1) or two (2) floppy drives
Separate board- and floppy enclosure
Two (2) free slots for expansion cards.
MCZ 1/10 It is mentioned in older Zilog® literature, but it doesn't really exist.
Was launched in 1979 as MCZ 1/35.
MCZ 1/20 Description 9 slot card cage, MCB, MDC, two (2) floppy drives
Boards and floppy disk drives in a single enclosure.
7 free slots for expansion cards.
MCZ 1/20A 9 slot card cage, MCB/MT, MDC, two (2) floppy drives
Boards and floppy disk drives in a single enclosure.
Backplane prewired for HDD controller (4 cards)
Three (3) free slots for expansion cards. Other features are identical to the MCZ 1/20
MCZ 1/20A-2 9 slot card cage, MCB/MT, MDC/48, two (2) floppy drives
Boards and floppy disk drives in a single enclosure.
Backplane prewired for HDD controller (4 cards) and Z80-SIB/MT
Two (2) free slots for expansion cards.
System does not include Software.
MCZ 1/25 9 slot card cage, MCB, MDC, two (2) floppy drives, 19" rackmount
Single 19" rack enclosure
7 free slots for expansion cards. Other features are identical to the MCZ 1/20
MCZ 1/25A 9 slot card cage, MCB/MT, MDC, HDD controller (4 cards), 5MB + 5MB HDD, 19" rackmount
Single 19" rack enclosure in a cabinet together with the hard disks.
Backplane prewired for HDD controller (4 cards)
Three (3) free slots for expansion cards.
MCZ 1/25A-1 9 slot card cage, MCB/MT, MDC/48, no drives, 19" rackmount
Single 19" rack enclosure
Backplane prewired for HDD controller (4 cards) and Z80-SIB/MT
Two (2) free slots for expansion cards.
System does not include Software.
MCZ 1/25A-2 9 slot card cage, MCB/MT, MDC/48, two (2) floppy drives, 19" rackmount
Single 19" rack enclosure
Backplane prewired for HDD controller (4 cards) and Z80-SIB/MT
Two (2) free slots for expansion cards.
System does not include Software.
MCZ 1/25A-3 9 slot card cage, MCB/MT, MDC/48, HDD controller (4 cards), 5MB + 5MB HDD, 19" rackmount
Single 19" rack enclosure
Backplane prewired for HDD controller (4 cards) and Z80-SIB/MT
Two (2) free slots for expansion cards.
System does not include Software.
MCZ 1/30 2 x 9 slot card cage, MCB, MDC, two (2) or three (3) floppy drives, 19" rackmount
Two (2) 19" rack enclosures for boards and floppy drives
Backplane prewired for HDD controller (4 cards)
12 free slots for expansion cards.
MCZ 1/35 9 slot card cage, MCB, MDC, HDD controller (4 cards), 5MB + 5MB HDD, 19" rackmount
Single 19" rack enclosure in a cabinet together with the hard disks.
Three (3) free slots for expansion cards.
MCZ 1/50-1 Hardware is a MCZ 1/20A-2
Choice of RIO Version 2 or RIO Version 3 Operating System, Choice of Single Terminal or Multiterminal COBOL Run Time Interpreter or BASIC Interpreter. (All Software must be ordered seperately at no charge).
MCZ 1/60
MCZ 1/62
A classic MCZ system combined with an intelligent CRT in a single housing. Two (2) floppy drives.
MCB, MDC, with Z80-VDB board for video. Six (6) free slots for expansion cards.
The floppy drives are in a 19" rack enclosure (MCZ 1/60) or in a desktop enclosure (MCZ 1/62)
MCZ 1/70 9 slot card cage, MCB/MT, MDC, SIB/MT, HDD controller (4 cards), 5MB + 5MB HDD, 19" rackmount
Single 19" rack enclosure in a cabinet together with the hard disks.
Two (2) free slots for expansion cards.
MCZ 1/70-1 Hardware is a MCZ 1/25A-2
Choice of RIO Version 2 or RIO Version 3 Operating System, Choice of Single Terminal or Multiterminal COBOL Run Time Interpreter or BASIC Interpreter. (All Software must be ordered seperately at no charge).
MCZ 1/70-2 Hardware is a MCZ 1/25A-3
Choice of RIO Version 2 or RIO Version 3 Operating System, Choice of Single Terminal or Multiterminal COBOL Run Time Interpreter or BASIC Interpreter. (All Software must be ordered seperately at no charge).
MCZ 1/80 Name only found in an old mailing list (2005)
Part Nr. 05-6002-05, Serial Nr. 744, 60KiB RAM, no other information avialable!
MCZ 1/90 An MCZ 1/60 System with additional HDD unit in a 19" rack enclosure.
PDS 8000/10
PDS 8000/15
Renamed MCZ 1/20, is identical
Program Development System 8000 (PDS 8000) is a marketing name to show that the systems are suitable as a development environment for all Zilog processors (Z80®, Z8® and Z8000®).
Shipping variants:
Available as a pure RIO system or bundled with the Z8000® Development Module and Z8000® Development Software (Model /15).
PDS 8000/25
PDS 8000/30
Renamed MCZ 1/35, is identical
Also a commercial gimmick ;-).
Shipping variants:
Available as a pure RIO system or bundled with the Z8000® Development Module and Z8000® Development Software (Model /30).
MCZ-2 Systems
Model Description
MCZ 2 Series common parameters Hardware:
Z80A® CPU (4MHz), 64kiB RAM, 6KiB ROM for bootloader and startup diagnostics
Four (4) slots for expansion cards

Floppy Disk:
Intelligent floppy disk controller (PDC) with dedicated Z80A® CPU, ROM and RAM
One (1) or two (2) Dual floppy drive(s) 2.4MB in a separate enclosure
Double side, double density disks, industry compatible IBM 3740 format

Software:
Multitasking OS RIO/CP (RIO Concurrent Processing)
COBOL Multi-Terminal (COBOL/MT) or COBOL Single-Terminal (COBOL/ST) runtime or Zilog® BASIC
MCZ 2/20 Table Top CPU and Memory Chassis
Options: Floppy controller (PDC), One (1) or two (2) Dual floppy drive(s) 2.4MB, Console CRT Terminal, Programmable Serial Interface (PSI) for up to four (4) additional Terminals, Printers
System does not include Software. Software is avialable as option.
MCZ 2/25 Identical to the MCZ 2/20, but as a 19" rackmount system
MCZ 2/50 Table Top CPU and Memory Chassis
Floppy controller (PDC), One (1) Dual floppy drive 2.4MB, Console CRT Terminal, Software included
Options: A second Dual floppy drive 2.4MB, Programmable Serial Interface (PSI) for up to four (4) additional Terminals, Printers
ZDS Systems
Model Description
ZDS
(or ZDS/U)
2MHz or 2,5MHz, Two (2) floppy drives
Separate board- and floppy enclosure.
ZDS 1/25 2,5MHz, Two (2) floppy drives
Boards and floppy disk drives in a single enclosure.
ZDS 1/40 2,5/4MHz, Two (2) floppy drives
Separate board- and floppy enclosure.
System CPU 2,5MHz, User CPU and CPU emulator 4MHz (Z80A®).