All original parts cleaned and restored.

What is the serial number of the card?

What does the red button do on the System Bus Bridge?

The red button is unconnected, with no traces of once being welded.

All original parts cleaned and restored.

An excellent job

On the download section you can find a collection of images, but a little outdated.

or you can find on EP128.hu under Disk-image file-ok

That page has an English version too.

Since several people have been asking me for some time about able of purchase the EXDOS interface, I have refreshed the project.
It is even more compact, more compatible with newer drives and commonly used interlaced tape.
Optionally is available a connector for the second card (EPNET or ZX Spectrum Emulator).
The spacing of mounting holes in the card is compatible with the hole spacing in the 3.5" drive.
It will be a simple interface, without the fireworks that I am planning for the AMIO card.

For now, however, the Turbo card has priority.
In addition, the PCB contractor will celebrate the New Year almost until the end of February.
So it will be necessary to wait for the PCBs.

Actually, why not ?
Let it be DIP32.