Hi guys, after I had cancelled my dream C64 SID Synthesizer almost two years ago, because I just couldn't get it running, I now got back to this project in will of bringing it to a glorious end. So first of all a big and warm THANK YOU to TK for keeping dreams alive... :) Now I've had the chance to connect my MB SID to an oscillator and I was able to do some more checking... But I should start at the beginning: I do have the minimal setup: 1 CORE, 1 SID and the C64 PSU. All soldering and connections triple checked, there's no short circuit, all voltages are correct at the necessary points (9V for my 8580). Unfortunately, there's no output on my SIC, though MIOS Studio has shown all checksums okay after Updating to Bootloader 1.2, MIOS 1.9 and SID Application 1.7303b. Connecting my 4 x 20 LC display shows me black bars in row 1 and 3, no sign on row 2 and 4. Okay, back to my osci: seems like I do not have any output on RD6 from my PIC (18F452). And this on three PICs I've tested. Is this normal? Otherwise: what might be the reason for my non-functional LC and my missing SID output? Clock works fine, MIDI exchange PIC - MIOS Studio works fine. And wiring between CORE and SID has definately been checked and checked again and again. After two years, I finally want to get this project done and would be really happy for any help! ;) Thanks, Markus