| • • • • the brilliant KC 85/4 |
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| 85/4 | quick introduction |
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The 8bit small-computer KC85 -KleinComputer85- has been developed
as basis device for an expandable small computer system. The main difference compared to the common home computer is the modular concept which allows to
connect special devices and different modules. Due to this concept the KC85 can be adapted to the most different tasks and applications. The basis device
KC85 is equipped with a plug-in bus extender. The expansion interface allows to attach one or more extension top boxes. Also there are 2 additional front
side slots for plug-in expansion modules. The intend to design a small computer system on a modular base was -at its time 1988- very unique and outstanding.
THE MODULAR MONSTER was born. |
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The KC85 BASIS DEVICE works with a U880-CPU 1,77 MHz [Z80-Clone]. 128 KByte RAM built in. 64 k restricted
as IRM -Image Repetition Memory-. 64 k free available. Of these,
64 k of RAM, two 16 k blocks are for address 8000H parallel running, by bank switching up to 4 MByte. As well as 20 KByte ROM including: 4 k CAOS C , 8 k CAOS
E , 8 k HC-BASIC. CAOS is the operating system of the BASIS DEVICE. CAOS used in text mode 40 x 32 characters. In the graphics mode
320 x 256 pixels, and 4 colors in fully graphic arts mode. In the other modes 16 colors for the foreground
-INK-, and 8 background colors -PAPER-. |
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| KC85/4 Memory Allocation | ||
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1x Floppy Disk Basis 2x Busdriver 1x Basis Device 1x Keyboard |
D004 [for 2 modules] D002 [for every 4 modules] D001 [for 2 modules] D005 [comfort keyboard] |
2x Floppy Disk Drive 3.5 inches [ 800KB DS/DD] 2x Floppy Disk Drive 5.25 inches [ 800KB DS/DD] 1x LCR-C Data [recorder] - Dxxx => Device number xxx- |
The FLOPPY DISK BASIS has its own U880-CPU 4MHz and 64 k RAM. Under MicroDOS exactly 50 KByte TPA -
Transient Program Area- can be used. MicroDOS is the operating system in
the PC mode -similar to CP/M-. It can used some function of the BASIS DEVICE with MicroDOS or the newer operating system, called ML-DOS.
For example: graphics, color and windows techniques. Even a dual-processor operation is possible.
In to this FLOPPY DISK BASIS
hidden a GIDE
KC-Club version with 2.5 inches HDD -64MB used- and CF-Card as Slave -64MB used-. The 4MByte RAM-Module -see module with 4 LEDs in
series- formed a gigantic RAM-DISK Drive A: under MicroDOS . It was in the KC-Club developed, as well as a scanner module
with interfaces. Many possibilities are available for development newer hard- and software.The KC85/4 was VEB Mikroelektronik "Wilhelm Pieck"
Mühlhausen -GDR- produced . Also simply called VEB MPM or just MPM. Produced in the years 1988 to 1990. -
VEB "Volkseigener Betrieb" = SOEs 'state-owned enterprises' - |
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| CAOS 4.4 [Basis-System] Animation runs | ML-DOS [CP/M-System] Animation runs |
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The next future for the KC85/4 will be TCP / IP for CAOS and CP/M. It isn't Fisherman's Tale -the end of the slipper networks- In the "KC85 Labor" of Ralf Kästner - KCNET -and USB support - project by Mario Leubner - |
This picture shows the more developed ML-DOS. With first file manager in color on CPM-Basis for the KC85/4 created by Mario Leubner. The demo programm INTER [zip,avi 263 KB] -first point: Graphics ........ as real time video- Screenshots were made possible by the KCemu of Torsten Paul |
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| Collection of links to the subject KC85 |  |
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KC85/4 HOME
 system structure operation |
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| copyright © 2008-2022 by götz hupe | |||||||