As I told you earlier we made 70 teacher stations with HDD for Kazakhstan/Kyrgystan. The teacher machine was an original 64k machine, equipped with EXOS 2.1 and teacher cartridge (BASIC 2.1, cyrillic character set, cyrillic printer driver). Due to the 256kB static ram on the interface card the machine had 320k of memory. Therefore we made these stickers. The picture shows the last surviving ones.

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About the "EXDOS - Early version - small hole" I asked it:
Look at this photos about the Floppy Station. I think it is developed
for the early "small hole" cards. For the final cards needed the big
screw washer.
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yes I believe that too. Probably the Germans got the early version of the controller to start developing the floppy disk station and there was neither a box for the controller, nor there was one for the system bus bridge at that time. This is probably the reason why there is the "naked" edge connector on the fdd-unit, that is shown on the German brochure.
 
The metal tooling was already finished for the German fdd-unit, when Enterprise UK released the final version of the controller incl. the ABS housing. Then they made this big metal washer to fix the new controller in the case. Unfortunately there was this slight change in the contour of the edge connector as well. So the first German drives had a problem with the expansion port connection. The "fingers" on the edge connector were not fully aligned to the contact of the system bus bridge. Therefore there were a lot of floppy disk stations coming back as "non-functional".
 
We had to rework all drives of the first production lotl: We turned the washer upside-down and moved the exdos controller a little bit forward towards the front end. You can see that on your picture, as the stud is not centered in the hole. And we had to remove appr. 1mm from one side of the system bus bridge. That moved this pcb in the same direction. Then everything was working well.
 
And there was another mechanical problem: We had to use the existing system bus bridge. The bridge was designed for sitting in a stand-alone box. The height of it's pcb matches the height of the computer pcb exactly. When mounting the bridge and it's ABS housing in the metal case of the fdd, the edge connector of the bridge was appr 2 mm higher than the computer pcb. Therefore the computer was appr. 2mm above ground on its right-hand side, when it was connected to the fdd. We had to cut these 2mm from the bottom-end of the ABS housing of the bridge to be able to "lower" the pcb. After this conversion the heat-sink of the bridge was sitting directly on ground of the fdd-case. This increased mechanical stability too.
 
The fdd-units worked properly after that conversion and we had no further problems with the drives. All-in-all we had to do appr. 250 units, that we had in stock. It was a nice job and caused a lot of trouble and it was a costly exercise too. But it is a typical example for a variety of problems that Enterprise UK caused themselves by sloppy planning, pressure of time and fading financial resources.

From Werner ROM collection some diagnostic ROMs. These used as TEST_ROM, at 04h segment in the cartridge.
DAVETEST: generate some test sound
NICKTEST: display test picture
DIAG 1.0 and 1.1: used in the factory to test the boards. The menu use 15 keys keypad which connected to the Control 1 port. (Use all possible 15 buttons in one Enterprise joy port!) Some test can be started with simple Ext 1 joy.
For the peripherial ports test need additional wires for make input/output signals.
The 1.0 and 1.1 version are same, just the date and version number modified.

The Testgear-software was for the Hypertone-Testgears. These machines were for testing the ready to use motherboard of a machine, not for testing the fully assembled computer. As the EC keyboard had to be attached manually at the later assembly there was a small keyboard, attached to one of the joystick ports to be able to make some inputs. I do not have any information (cabeling, ...) about that.

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For these I not have a idea
It is not looks a Z80 code. Probably ROM for the testing machine? Or data ROM for the previous test ROMs?

EXDOS version 1.1
It is the German version of the EXDOS 1.0 (as the 1.3 are the German version of the 1.2). Language switchable (BRD/UK).
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For these I not have a idea
It is not looks a Z80 code. Probably ROM for the testing machine? Or data ROM for the previous test ROMs?

I would suggest not UK in origin: they contain the strings "PULL THE RESET BUTTON. THEN PROCEED" (among others) but in English you would PUSH the reset button. But then why the messages in English...?

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Is this Enterprise GMBH's creation? The PCB says Copyright 1986, very near the end of Enterprise UK! Z80B and build-in WD1770, now you know why the timings for a faster processor were in the code!