Keep an eye on my eBay channel: http://www.ebay.co.uk/sch/quantit/m.html

I am offering lot's of rare sets the coming weeks.
On right now: a very complete boxed ZX81 set!

These are some of the items you can expect the coming weeks:
- Boxed 128K heatsink ZX Spectrums (yes, more than one)
- Opus Discovery disk systems (again, more than one)
- Disciple disk interfaces (unbelievable, even more than one of these)
- Lot's of 48K ZX Spectrums
- Interface 1 + Microdrive sets
- Original ROM game-cartridges
- ZX81 sets
- And much more....

So, put my eBay channel in your browsers favorites to not miss one of these incredible offers!

As I had the rare and awesome opportunity to be able to buy 5 or 6 Opus Discovery interfaces this year, and because I couldn't find hires pics of the board on Google, I thought it was time to upload some myself.

Here's a video in which I'm dissassembling a floppydrive from an Opus because I forgot to set the driveselect correctly:
http://www.youtube.com/watch?v=JjvzLBlzDgY

Here they are pics (click for hires):









Some problems I had to repair with these Opus Discovery interfaces were:
- defective rectifier
- defective ROM
- one didn't have a 6116 ram chip, don't know if it is needed, but I ordered one anyway
- one had a defective WD1770 floppy controller; replaced it with a WD1772 from an Atari ST: another model but pincompatible, and that worked great!
- one floppydrive failed, but luckally that Opus had two! Only needed to make a bracket to cover the space
- the soldered wires on the 'flying' LM317's come off easily with some movement: very frustrating when you are repairing an interface...

I encountered these interesting things:
- two had a rom v2.2 (one even had a paper with rom changes, but I didn't scan it, sorry!); the lowest rom version I found was 2.1, probably the default factory-rom
- I had one large filled floppybox with about 40 floppies filled with data; very rare to have owned as all others had only one or two or no floppies at all
- there are some different ways of how the voltage regulators are mounted
- there are some different board versions, haven't checked for numbers

This seems a lot of trouble, but believe me: ZX Spectrums fail a lot more and at a lot of more parts.

All together the Opus Discovery is a very solid system, which still works after so many years!

I visited the Dutch C64 fair where also fanatics of MSX, Sinclair, Atari and other brands were present.

I brought my laserharp, here's a video (click on pic):

I just opened a new topic on World of Spectrum (click here) with info about ordering the new stereo sound enhancement.

It's a complete kit including stereo audio output socket and switch to choose between ABC and ACB sound.
All is explained in this manual (click here).

I managed to connect a DB60XG wavetable card to my 'Laserharp' ZX
Spectrum.
So that is also the function: to create sound for my
laserharp (look at my Youtube videos).

It took some hours to get this working as the DB60XG somehow needs a reset after it's powered on.
Then the second thing it needs is a GM initialisation.

I'm trying out different sounds in this video. The setup was for prototyping only. I will build the electronics into a case together with the DB60XG.

Here's a video of the setup working:
http://www.youtube.com/watch?v=9zGFNfNAVXw

Some pics: