Thursday, December 1, 2011, 12:38 PMAs 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:
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!
Saturday, November 5, 2011, 10:43 AMI 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):
Thursday, September 22, 2011, 08:16 PMI 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).
Sunday, August 21, 2011, 01:03 PMI managed to connect a DB60XG wavetable card to my 'Laserharp' ZX
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:
Sunday, May 8, 2011, 05:17 PMTwo more fairs are organized by Bonami this year:
2 October 2011, Apeldoorn, The Netherlands:
18 September 2011, Steenwijk, The Netherlands:
Visit the Bonami site for more info!
Or click here for the English translation.