That thing where you google an error message and find the solution in a forum posting from six months ago when you last had the same problem. 🤦‍♂️

Arthur Brown - Fire 🔥 (1968) YouTube video by Beat-Club

www.youtube.com/watch?v=YzHt...

I could have just bought a new one. But I'm GenX :-)

A Close Encounter with polyphony !

Today's target was to get my Midi keyboard to control the PSGs. Only monotonic sofar.

Hopefully it will be when I've written some software to use all six channels :-)

Not quite. It's he one with only one port.

Here is my RC2014 sound board now with both AY-3-8912 PSGs installed and the new active mixer daughter board fitted.

Ah, the newer version of my Zed Pro. You'll have lots of fun :-)

Today's little construction project. It's a mixer for my Dual AY-3-8912 sound board. It mixes the six channels down to stereo, two left, two right and two center (71% left and right).

All I did was check Vcc and Gnd pins and a quick visual check of the rest. I'm confident my soldering technique is good. I assumed any back plane faults would show up pretty quickly when I started to test the completed system. None did :-)

Which version are you building ? Which peripherals are you adding ?

Very therapeutic ! Have you worked out just how many joints there are on your back plane ?

What flavour did you install ?

How did it go (if it went at all) ?

Ah, the joys of building your own kernel that was small enough to fit on a bootable floppy :-)

That depends on if you expect it to go smoothly or not :-)

Here is my RC2104 AY-3-8912 board in action :-)

I need to upgrade my CP/M 3 installation first as I there was some digital sealing wax and virtual string used to get it working :-)

Bus and train journeys are for looking out the window :-)

My RC2014 sound card is making music :-)

Why does everyone put captions in their videos these days? I find them very distracting as I find myself reading them rather than actually looking at the things being shown in the video. The choice to see them should be made by the viewer so that those that need them can have them always enabled.

The first µP I built used a GI LP8000 www.wass.net/othermanuals... A group of us at school built them. Mine had 16 Leds+Switches, Hex Keyboard,VDU,GI Top Octave Generator based 4 channel sound,Wave Table sound, dual DtoA,Paper Tape Punch and Reader,Teleprinter,6K RAM,2K ROM.

A piece of veroboard with hand wired connections plugged into an RC2014 bus back-plane.

My latest RC2014 board. It takes two (though only one fitted so far) AY-3-8912 Programmable Sound Generators. That will give me six channels of square-wave goodness

Hmmm I was out for a ride on my bike down that way.....

I changed my mind. Weather is much warmer tomorrow :-) I might go and have a look at Berry Wood, Wootton as a spot to operate from.

Changed mymind as wx should be much warmer tomorrow :-) I might go an go and take a look at Berry Wood Wootton maps.app.goo.gl/cpdVjTT9tpjf...

I plotted the dummy load without the patch lead first, just to eliminate that possibility ! This is not my first rodeo :-)

Mine is a load of 3k9Ω 2W resistors in parallel! It's not great on 30MHz but fine below that.

This might explain the trouble I had with my SGC-239 yesterday. This is the plot of the patch lead I was using with a 50Ω dummy load on the end. Subsequently I found I could just pull off the PL259 on one end. It has been fixed now.