Z25
A most economical small desk-
Word length 18 bit, 38 basic instructions, up to 1024 index strorage cells Maximum working speed 7100 operations/s.
Ferrite core working store for extension up to 16384 words Ferrite core fixed store for extension up to 4096 words.
Auxiliary magnetic drum store holding 17664 words.
Magnetic tapes with a working speed of 100 000 characters/s Input and output via punched tape, punched cards, line printer Connection of data sampling systems for process control
Several ZUSE Z 25 can be coupled together.
The central unit occupies very little space.
The extraordinarily wide range of extension facilities, both as regards the stores and the peripheral equipment, assure the ZUSE Z 25 a widespread field of applications. The low purchase price of the central unit allows to be augmented economically to form multiple systems with, depending on the nature of the problem, may processes identicval or different programs in true simultaneous operation.
For Science and Engineering
Small-
In conjunction with the film translator ZUSE Z 84, the electronic planimeter ZUSE Z 80 and the "Graphomat" ZUSE Z 64, it can be used to achieve complete automation in surveying. With appropriately increased storage capacity it makes an ideal technical computer.
In the Commercial Field
High internal data processing speed obtained with the aid of special instructions
for double length arithmetic. High-
Quick sorting with high-
Owing to the low price of the central unit, true simultaneous operation of the system can be obtained by using several central units type Z 25 coupled together.
For process Control
Automatic sampling of measurands and data of a process, as well as transfer to the central unit over Jong distances by the flexible data sampling system.
Satellite systems can be formed by coupling several ZUSE Z 25 together. The interchangeability of all components of the system, including the central unit Z 25, assures maximum possible reliability, which is absolutely essential in the field of process control.
Central unit
Length of word 18 bit, word time 140 µs
Representation of numerical data: binary (corresponding to appr.5 decimals/word)
Instruction word
2'conditional bit
1 bit address modification
5 bit function part
10 digit address (unmodified)
38 instructions, including double-
Wired multiplication and division.
Transfer of instructions from store and execution in 1 word time.
32 interruption channels for breaking into programme.
Input and output channels for direct data transfer between several ZUSE Z 25 at internal machine speed.
Ferrite core working store, max.capacity 16384 words.
Extension stages: 256/1024 an 4 x 4096 words.
Ferrite core fixed store holding 2048 or 4096 words.
High-
Magnetic drum store for 17664 words.
Average access time per block 5 ms.
Magnetic tape unit with a reading or writing speed of 100 000 characters/s.
Capacity per 170 m tape (1/2 in.) appr.1 million words.
Data input
Punched-
Input of analogue values from data sampling systems.
Data output
Tape punch for 10 or 150 characters/s
Teleprinter for 10 characters/s
High-
Line printer for 5 lines/s
Output of analogue values via data distribution systems Analogus on-
plottingtable ZUSE Z 64 Graphomat
Output register for digital values for control of relays.
Design
Control desk with 18-
Printed circuit cards
Hinged chassis which simplify maintenance.
Areas of application
A general purpose computer for application in all areas of science, technology, process control, administration and commercial application. It was possible to extend the Z25 with additional memory, magnetic cylinder and magnetic tape and other peripheral devices. Complex systems for process control could be realized through coupling of several Z25 and devices for data input. Direct output of calculation results to the Graphomat Z64 possible.
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| Zuse-Apparatebau |
| Zuse 1936-1949 |
| Zuse KG (1949-1964) |
| Zuse KG - Computer |
| Z1 |
| Z1- Metal Sheets |
| Z2 |
| Z3 |
| Z4 |
| S1 |
| Z5 |
| Z11 |
| Z22 |
| Z23 |
| Z31 |
| Z64 |
| Z25 |