ChinMuzik

Mike only ships the PIC with the bootloader. From my understanding, the device ID can only be assigned when MIOS is flashed to the PIC. I've tested all 4 PIC in each of the 4 cores with the appropriate jumper selected. The same results happen. 2 of the PIC flood the input terminal...2 do nothing.

Yea, I'm in Windows 7. I've flashed PIC's on this rig before so I'm really stumped.

I purchased 4 PIC's from Mike's shop. I've followed the workup below (as much as I could). But no matter what I've tried, MIOS studio cannot detect the bootloader. Steps taken... 1. Tested loopback on interface. Loopback does work. When playing notes from virtual keyboard, messages show on in/out terminals. Random sysex strings also echo when typed in. 2. Correct ports are selected. 3. MIDI I/O of Core test out as "working". At this point, moved to Core Tests section 4. Unable to tell if I stuffed a parallel cut 10mhz crystal. I ordered it from Tayda. There is no data on how it's cut. Only spec listed is the oscillation is "fundamental". 5. Cannot see any bad soldering. Reflowed all the joints just in case maybe a cold joint. 6. VDD of the power supply is good. 5v at all points. 7. Ground is good, almost zero resistance at all points. 8. Polarity of the midi plugs test good. 9. Orientation of all diodes are correct 10. Resistor values are all correct 11. Test Core10 states "If you notice a lot of request messages like shown in this snapshot, then there is a short circuit between the Rx and Tx pin of the PIC. Check the tracks which are routed from the MIDI-Link port J11 to the Rx/Tx pins for direct connections (see the layout and schematic), you could scratch with a screw driver between the tracks to ensure that they are not connected together." the input of MIOS Studio terminal DOES show these messages, however, there is no short of the TX and RX pins when checked with continuity tester. also of note, this persistent messaging only occurs with 2 of the 4 PIC installed. The other 2 do not created this message flooding, but the bootloader is not detected on them either. these were purchased from Mikes shop. 12. Test Core11 performed. Soldered a 2200uf cap in place of the 10uf in C3 and checked soldering on C1 This did not work either. I tried several different outlets to no avail. Am I missing something?

Yea, the 12v reg was installed before I decided to ditch the mixed SID config. I am going to be using just 8580's and building a stereo 6581 box later on. I just didn't remove it because it's not hurting anything. Yea I checked the board for shorts and will clean the flux up. But as far as the shorts, I found none. No broken traces I can identify either. The traces by B1 are a bit chewed up from when I removed the bridge rectifier but continuity is OK and I covered it up with clear coat. So I installed c4 on the underside. And still no love... My 5v rail is good. All points are receiving steady 5v. Pin 2 on the MIDI OUT Jack has 5v. I also went back and jumpered an LED with. 220 ohm resistor in series between pins 26 and 31 of the core module. It lights and flickers during MIDI transmission. Maybe it's an issue with the optocoupler now I'm thinking. One strange revelation, I pulled all the PIC's and tested them in Core 1 to observe. Only 2 of the PIC cause the message flooding in the MIOS terminal. The other 2 don't return the persistent messages. But the bootloader isn't detected either. Really frustrating. I bought these from Mike so they should be burned with the bootloader already...But I don't know how to tell as I don't have a PickIt

Unfortunately, I don't have a diff 12v adapter I can hack up right now. Will have to buy an older used one and see...Just in case, here's a few pics.

I followed your issue with the switching regulator. Luckily, I did purchase the 1.5a variant so I'm pretty certain it's not the culprit.

I've got a bit of a dead end here... And I think it might be due to the C3 cap. My MIDI interface passes the loopback and sysex test. So I've gotten to test #11 of the CORE workup. Its stated as follows... TEST CORE11: The code upload can also fail if no, or a too small bypass cap is connected to the power rails of the PIC. A possible effect is, that for example "F0 F0 F0 F0 7E F0 00 01" will be sent by the PIC instead of the proper SysEx string "F0 00 00 7E 40 ... F7". Another effect could be, that something is received by your MIDI interface, but not displayed by the MIDI monitor because of the invalid MIDI event structure. This all can happen even when the IO and Software loopback test which is discussed below is passing, If this happens, check that the 2200 uF cap (C5 of the core module) is soldered properly. If you are unsure about the state of the cap, since you've re-used it from an old device, try another one. If you are using the optimized PSU for MIDIbox SID, bypass the outer pins of the (not mounted) 7805, so that C5 has contact with the +5V/Ground rails (see also mbhp_4xsid_c64_psu_optimized.pdf)! Upon powerup, it doesn't detect the bootloader and sends persistent "F0 F0 F0 F0 7E F0 00 01" messages. If it is in fact because C3 is too small...Can I just attach the 2200uf in series for testing purposes? Has anybody else experienced this issue with the 10uf smoothing cap?

Jaytee, will any basic noise gate pedal work? Is there any unwanted side effects from using it?

I always wondered about this too because I wanted to set the MB up as a super polysynth. So, to get 24 voices mono...I'd assume I'd have to load the same patch to each core, then configure the keyboard split to 4 zones to correspond with the 4 cores. Which leads me to believe the easiest way to do this would be saving an ensemble with this config.

Any source for them?

WOOOOOHHHH Soldered up the DIN, powered it up. 5v to all the sockets and 9v on the SIDs!! Now on to the CS! This is the best solution for a PS. Thanks everybody that was involved in this!

Being so recessed does it give viewing issues from certain angles?

Hey glad to see you figured the issue. How were you able to get the PT-10 case closed with the headers that join the boards? Those look very high.

So I bought a cheap PS adapter from ebay. 12v/2a. I cut the barrel connector off to measure the length needed to strip back for soldering the 7-pin DIN and then I realize this.... The gauge of the wire is much smaller than the sleeve on the DIN connector. Obviously this isn't major but it's really triggering my OCD. I guess cracking the PSU enclosure and running a thicker gauge is the best way?

How long did it take before the OLED burned up on you?

Yea the wiring will be the biggest issue for me. Will spend endless hours on a breadboard starting today. Then while laying out will have to decide whether perfboard or Stripboard is a better way to go

OK great... It's actually more straightforward than I expected. Thanks a lot latigid.

OK I think I understand now. So if, for example, Osc waveform is assigned to a button DINX4 J3/D7...that DINX4 has to be chained to the DOUTX4 module with the corresponding LED pin? The firmware handles the rest?

Hi, After stuffing 8 8580's in a Mb-6582, I've decided to build a stereo mbsid V2 for a pair of 6581's laying around, with a CS inspired by the MB-6582. (Well, essentially the same exact surface sans the mod matrix). Am I wrong to assume that the correct (or easiest way) of achieving this would be to just edit the mb-6582_setup.asm file and reassign the pins to the corresponding parameters? And the 2nd part, I've scraped the forum religiously trying to find any and every bit of info on how to wire the LED's to the corresponding buttons when building a CS. For example, aren't tactile switches momentary? If so how does the led latch when selected? (like when selecting the waveform, for example)

Lol yea I already desoldered it and reinstalled.

I think I installed my 9v sVreg backwards. Please tell me I don't have to desolder this thing lol. (I know I do)

Does anybody have other sources for Encoder knobs? They are the single hardest component to source. Everything is detented or just ugly.

Does anybody still have these arps? The links are dead

I can't read layouts so I had no clue if there was a second layer or not. So I was confused when I saw the drill holes when the boards came. Thanks Latigid! Edit: I guess I should have known also from the traces underneath the board lol Learning is a slow process for me

I'm just looking for continuity between the bridge points?