janlugt

Sorry, I wasn't clear, my bad. I let it run for about 7 seconds and then i turned off the power supply. The F8 and FC's occur when i turn it off. Guess they're not really relevant. edit: also tried several mac's. Even started one up in Boot Camp to try it under Windows. Guess the problem is in the core module...

Wouldn't it be kind of strange if it were to constantly reboot precisely every two seconds? How can I check whether or not it reboots? If it does, what would be the best thing to do?

Thanks for your reply. I wasn't aware of a interface blacklist (maybe reference it in the troubleshooting guide), but I've tried several interfaces. One of them was an ESI M8U, that might have given trouble. Another one was a cheap interface bought on dealextreme, and another one is a Focusrite Saffire LE. This is the output when I connect the core to the Saffire: 00000000414697 ms | [F8] Timing clock 00000000414698 ms | [F3 03] Song Select: 3 00000000418480 ms | SysEx: F0 03 7F F7 00000000420374 ms | SysEx: F0 03 7F F7 00000000422264 ms | SysEx: F0 03 7F F7 00000000423982 ms | [F8] Timing clock 00000000423986 ms | [FC] Stop 00000000423988 ms | [FC] Stop 00000000423992 ms | [FC] Stop 00000000423993 ms | [FC] Stop 00000000423995 ms | [FC] Stop 00000000423999 ms | [FC] Stop 00000000424000 ms | [FC] Stop 00000000424002 ms | [FC] Stop 00000000424003 ms | [FC] Stop 00000000424006 ms | [FC] Stop 00000000424009 ms | [FC] Stop 00000000424010 ms | [FC] Stop 00000000424014 ms | [FC] Stop 00000000424017 ms | [FC] Stop The sysex looks a little bit like the upload request, but something still goes wrong... What components of the core module shall I replace? I'll buy some new ones at the local electronics store, that's no problem.

After not doing anything with the Midibox stuff I had lying around for a couple of years (no time...), i decided it was time to finally finish the project I once started (to build a Midibox SID). I've built a Core v3 module with a PIC 18F452, but my Mac doesn't receive an upload request from the core module. Hereby my observations while doing the troubleshooting guide: TEST PROG1: PIC is programmed and verified with my own PIC programmer (A Wisp628). Programmed mios_update_v1_9f/pic18f452/burner/bootloader_v1_2b_pic18f452.hex to it. TEST CORE1: Verified (ordered by www.mikes-elektronikseite.de). TEST CORE2: Not relevant. TEST CORE3: Checked, checked and double-checked. TEST CORE4: All voltages are 5,0V (give or take 0,02 V). TEST CORE5: All voltages are 5,0V. TEST CORE6: Polarities checked. I presume mbhp_core_extract_midi_plugs.gif shows the holes in the sockets to which J12 and J13 are to be connected, not the pins of the cable. Checked both possibilities. This may not be entirely clear in the documentation, causing it to be a frequent problem for n00bs like me :-) TEST CORE7: Polarity of the diode is right. TEST CORE8: Both are 218 Ohm according to my meter. Checked all the other resistances too, should all be ok. TEST CORE9: Cables are crosslinked. TEST CORE10: Checked for shorts, aren't there. TEST CORE11: 2200 uF cap should be ok, not certain (exchanged it with another one). Can I check this? TEST OUT1: It flickers. TEST OUT2: Tried this too, no result. Thanks in advance for all your help! edit: after changing the PIC, the voltage on the TX pin showed up OK, and the output flickers like it's supposed to. However, my Mac receives garbled MIDI (using mmj): 00000004610968 ms | [F8] Timing clock 00000004610969 ms | [FD] Undefined 00000004612862 ms | [FD] Undefined 00000004614754 ms | [FD] Undefined 00000004616646 ms | [FD] Undefined 00000004618538 ms | [FD] Undefined 00000004619501 ms | [F8] Timing clock 00000004619503 ms | [FD] Undefined 00000004619505 ms | [FC] Stop 00000004619507 ms | [FC] Stop 00000004619510 ms | [FC] Stop 00000004619512 ms | [FC] Stop 00000004619514 ms | [FC] Stop 00000004619516 ms | [FC] Stop 00000004619519 ms | [FC] Stop 00000004619521 ms | [FC] Stop 00000004619523 ms | [FC] Stop 00000004619525 ms | [FC] Stop 00000004619527 ms | [FC] Stop 00000004619530 ms | [FC] Stop 00000004619532 ms | [FC] Stop 00000004619534 ms | [FC] Stop And this is what Mandolane makes of it: 00000000009840 ms | [F3 7C] Song Select: 124 00000000009841 ms | [F8] Timing clock 00000000009841 ms | [FF] System Reset 00000000009841 ms | [FF] System Reset 00000000011731 ms | [F8] Timing clock 00000000011731 ms | [FF] System Reset 00000000011733 ms | [FF] System Reset 00000000013624 ms | [F8] Timing clock 00000000013624 ms | [FF] System Reset 00000000013625 ms | [FF] System Reset 00000000015516 ms | [F8] Timing clock 00000000015517 ms | [FF] System Reset 00000000015518 ms | [FF] System Reset 00000000017408 ms | [F8] Timing clock 00000000017409 ms | [FF] System Reset 00000000017410 ms | [FF] System Reset 00000000019301 ms | [FF] System Reset

The flickering of the LCD-display is over. It was simply fixed by increasing the voltage of the wall adaptor (the voltage dropped when the current draw became higher, cheap shit :))

I've tried two SID's, and they both give the same noise. I can hear that it reacts to note on/off, because it gives some kind of click. I'll check the voltages, but i'm very positive they are all all right. The LCD works ok, but it flickers a little (only when the SID-module is connected). Could that have something to do with it? Thank you, Jan PS: Marcel, waar in Nederland woon je? Misschien kan ik bij jou een keer met een SID testen waarvan jij zeker weet dat hij het doet, zodat ik dat als probleem af kan schrijven van mijn lijstje. We hebben het voor elkaar gekregen dit te doen voor een project op school (Schravenlant, Schiedam, hier doe ik VWO), maar het wil nog niet helemaal vlotten en het moet binnenkort af zijn. De Core hebben we met veel bloed, zweet en tranen wel werkend gekregen, maar de Sid-module gaat gewoon nog niet.

I have made a Core-module and a Sid-module, and I have already tested the Core-module and the 40x2 LCD-display (with the MidiMon-program). The problem is: when I connect my Sid-module and try to play some notes, the only thing I hear is noise (which can be heard in the linked MP3). All the voltages are ok, I use firmware version 1.7, the standard program for a 6581 without control surface is loaded and I've made a crossing in the Core/Sid-interconnection cable. Do you have any clue? http://upload.janlugt.com/write/sid.mp3