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Yes I did, but it was before i fixed the missing resistor and diode for CAN. Maybe I'll try to hook up a PC PSU to +5V and then see if something changes...

As I said I checked for bad joints but found none. But now I don't think it's an LCD issue. When I plugged the whole thing in, I was able to jam for about 10 mins. I loaded some patches via midi, plugged midi keyboard and audio jacks and enjoyed playing for a few minutes. The LCD was OK. But after about 10 minutes CORE gone mad. Hung notes, frequent reboots and sometimes it even failed to load mios after reboot (boxes on display and F0 00 00 7E 40 00 01 F7 string over and over). I burned another PIC using PIC Burner, loaded MIOS, SID app, then played some notes and... You probably know what. Maybe it's BOR? I'm using C-64 PSU. To find this out I unplugged the LCD, and the results were similar: 00000000007477 ms | Sysex message: F0 00 00 7E 40 00 01 F7 00000000002520 ms | Sysex message: F0 00 00 7E 40 00 0E 0B 00 F7 Quick reboot and no response to MIDI, only sysex on midi out: 00000000065931 ms | Sysex message: F0 00 00 7E 40 00 01 F7 00000000069915 ms | Sysex message: F0 00 00 7E 40 00 01 F7 00000000073900 ms | Sysex message: F0 00 00 7E 40 00 01 F7 00000000077886 ms | Sysex message: F0 00 00 7E 40 00 01 F7 00000000081872 ms | Sysex message: F0 00 00 7E 40 00 01 F7 00000000085858 ms | Sysex message: F0 00 00 7E 40 00 01 F7 00000000089845 ms | Sysex message: F0 00 00 7E 40 00 01 F7 00000000093831 ms | Sysex message: F0 00 00 7E 40 00 01 F7 00000000097818 ms | Sysex message: F0 00 00 7E 40 00 01 F7 00000000101804 ms | Sysex message: F0 00 00 7E 40 00 01 F7 Reboot und noch einmal: 00000000301013 ms | Sysex message: F0 00 00 7E 40 00 01 F7 00000000304996 ms | Sysex message: F0 00 00 7E 40 00 01 F7 00000000308981 ms | Sysex message: F0 00 00 7E 40 00 01 F7 00000000312965 ms | Sysex message: F0 00 00 7E 40 00 01 F7 00000000316950 ms | Sysex message: F0 00 00 7E 40 00 01 F7 00000000320935 ms | Sysex message: F0 00 00 7E 40 00 01 F7 00000000324920 ms | Sysex message: F0 00 00 7E 40 00 01 F7 ... Maybe it's a capacitor (naahhh...)? Because after a few hours I can repeat the whole procedure for some mins. Ah, almost forgot to say: my core module isn't stuffed with 7805, so no heat source. I have 3 PICs, one of them is normal 18F4685 and the rest 18LF4685 (tried both). So maybe I should lower the brownout voltage? Or? Any ideas? Regards Mat.

Yup, there's no single wire at D0-D3. Only D4-D7 connected. I'll check one more time if there are any loose wires or joints, but I doubt if there are any. I haven't moved core pcb or lcd when IT happened. I'll write about the results. About that charset: is it then possible to remap the charset via MIOS? I.e. to swap a char with another available?

Hi Nils. I wish it was so easy. But my LCD runs in 4 bit mode. And as I said, it has been running well for a while. What next? Regards

Hello everyone, finally after ages I decided to build a Midibox SID. I bought all the components, etched and drilled the PCBs (for the very first time), checked for shorts and soldered everything. First I made a PIC Burner that worked surprisingly well, then spent hours trying to program PICs. Finally I realised, that I should only write the bootstrap loader. And load MIOS via MIDI BEFORE I try to load an app... Yeah, it took me some time to figure this. But you know how it is when you want to see/hear the results of your work immediately... After uploading MIOS and SID app I finally saw a message on the display. I was so happy! I was proud, that I'm smarter than a machine, but... I checked and plugged SID module, played some notes, heard some noisy squarish waves, and the whole thing began to freeze and reboot constantly. After a few hours I realised, that only SID app causes this trouble. Then after a while I found, that I soldered the 1k pull-up for the CAN interface to Vss instead to Vdd. Now I have a working SID, but.... Suddenly my LCD said 'enough'. It's blank or when I send a message with MIOS Studio, it displays crap... Even when I load another app it behaves so. There is only a row of rectangles during boot, but later same sh*t. I'm seriously tired. I've read like 40 pages of this forum, but found nothing particular. Maybe someone smarter and more experienced than I sees the cause? And one more thing - my LCD (http://www.artronic.pl/o_produkcie.php?id=873) doesn't display some chars (like | { } and more) properly. For example instead of | it shows me 15. I noticed that it has cyrillic charset... Is it possible to correct this somehow? Hardware: Core - MBHP_CORE_V3 Sid - 2x MBHP_SID_V2 stuffed with 8580 PSU - Optimized C64 PSU. Regards Mateusz