DAI industrial system 9.5" rack

The CPU card, Keyboard/Display Unit, the Experimenter and the DCE-PWR unit were sold as a educational "DCE-micro-computer". There is a course by the "Dirksen" educational institute based on this set.

Processor card DCE-1		This card is a predecessor of the DCE-X displayed above. The card contains both RAM (4 * 2111 = 512 bytes) and ROM (2 * 2708 = 2 kByte, extendable to 4 * 2708), so was a single board computer. A 8255 for the RWC bus and a 5501 controlling the KDU via the 25 pin connector. The ROMS contain the monitor program using the KDU as user I/O. The 8255 is memory mapped at addresses 1C00-1C03. The 5501 is memory mapped at 9800-980F. The Connector layout.
Keyboard/Display Unit DCE-KDU		This calculator like device allows the user to interact with the monitor program. Both work, but any documentation is lacking, so operation has to be reverse engineered. The KDU contains only simple logic, so keyboard/display scanning is done in the monitor.
Experimenter card DCE-EXPERIMENTER		This board allows experimenting with the DCE bus. Drivers and LEDs for outputs, pullup resistors and dipswitches for inputs. A power connector (-5,+12,GND,+5V) and some reset and interrupt controls at the top. The sockets at the bottom are test points for each line. At the left the connector to the DCE-1. The Connector layout.
Rack 9.5"		Room for four I/O cards.

DAI industrial system 19" rack

Property of Jaak Bartok

Processor card
DCE-X
The processor card contained the processor (Intel 8080), RAM (dual 2114, 1 kByte), an UART/IO (TMS5501) and a RWC interface (8255). The 25p. sub-DE connector was used for external control on the system (KDU-console?). The flatcable header (middle left half) connected the processor card with RAM and ROM cards.

Floppy card
PDM-FDC
The floppy disk controller is based on the NEC D372D. The card contains an CPU complete with RAM and ROM to handle the data. This simplifies the main processor load.

Dynamic RAM
RAM / D
Contains 32 kByte. Two banks of 4116 dynamic RAM. The rack connector at the right is the DCE bus, so the processor was directly connected through the flatcable connector at the left side.

ROM card
DCE-LSA
The boot ROMS (3 * 2708) and also 512 byte RAM (4 * 2111). The rack connector at the right is the DCE bus, so the processor was directly connected through the flatcable connector at the left side.

Rack 19"
The 19" rack. Left the power supply, right the floppy disks. The OS was different from the one used for the DAI home computer.

List of cards:

RWC-T24 - Generic TTL interface module
RWC-D12 - Isolated digital input and output module
RWC-DI24 - Isolated digital input module
RWC-AI - Analog Input module
RWC-V8/16 - Analog high speed Data Acquisition module
RWC-A02 - Analog Output module
RWC-CCE - Double serial communication module
RWC-SLD - Serial linecontrol module
RWC-MC/DC - DC Current control module
RWC-HC/DC - DC Large current control module
RWC-PTM - Position and temperature measurement module
RWC-MUX - 4-wire multiplex module
RWC-IEC - IEC (IEEE) Bus module
RWC-F - Experimental module
RWC-SBM - Bus syyystem monitor
RWC-PWR - Power supply
RWC-PWR/H - Power supply larger systems
RWC-PRG - EPROM programmer module
RWC-FM/BSC - Bisynchronous serial IBM protocol
ICB - Interface cables
PSM - Various enclosure materials

Updated: 2012-05-18

e-mail

Processor card DCE-X		The processor card contained the processor (Intel 8080), RAM (dual 2114, 1 kByte), an UART/IO (TMS5501) and a RWC interface (8255). The 25p. sub-DE connector was used for external control on the system (KDU-console?). The flatcable header (middle left half) connected the processor card with RAM and ROM cards.
Floppy card PDM-FDC		The floppy disk controller is based on the NEC D372D. The card contains an CPU complete with RAM and ROM to handle the data. This simplifies the main processor load.
Dynamic RAM RAM / D		Contains 32 kByte. Two banks of 4116 dynamic RAM. The rack connector at the right is the DCE bus, so the processor was directly connected through the flatcable connector at the left side.
ROM card DCE-LSA		The boot ROMS (3 * 2708) and also 512 byte RAM (4 * 2111). The rack connector at the right is the DCE bus, so the processor was directly connected through the flatcable connector at the left side.
Rack 19"		The 19" rack. Left the power supply, right the floppy disks. The OS was different from the one used for the DAI home computer.