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Posted

Hi,

I bulit myself a MIDIbox SID 6581 and for a friend a 8580, so I have two boxes for testing.

Here is my problem: when I connect the boxes, all I can hear is a 1000 Hz tone (maybe 2000) and the box won't react to anything, be it a MIDI-keyboard or a patch from JsynthLib.

Regards, Florian

Posted

hey florian;

if you want some help; give us some more info

whats the hardware setup/ software versions u are using; PSU; have you got an lcd (which makes things way easier)? Does the core module work on itself?

cheers, marcel

Posted

I have two core modules, two SID modules (1x6851, 1x8580). (I have a third, unbuilt 8580-set as well)

Mike programmed the PICs for me and I don't have a display, so far.

I'm using 8V DC for the core and 14V AC for the SID, supplied from the same toytrain-transformator (I tried it with a C64 PSU but got a loud buzzing noise, beside the 1kHz tone).

I connected the audio out to one of my guitar amps and the MIDI in to a keyboard or to a USB interface.

Metering the pins described in the documetation, I get the correct voltages.

How do I test the core unit?

Hope you can help me solve the problem, because two of the three synthies are for friends of mine.

Flo

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