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emerson

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emerson last won the day on March 26

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About emerson

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    MIDIbox Newbie
  • Birthday 08/26/1969

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  1. I got hold of one of those aluminum-case probably-bootleg sammichFM and have been playing with it for a couple weeks. It wasn't in the best shape and I've fixed up a couple small issues already. I noticed a weird behavior that I'm sure is totally obvious to someone smarter than me: notes will crackle and be distorted a bit out one stereo channel, then out the other, in groups of three. That is, if I play three notes in a row, they'll all be distorted on the left, then the next three I play will be distorted on the right. Also, if I play a three-note chord over and over, that counts as
  2. Well, I let it sit for a couple weeks and came back to it yesterday. I've reflowed every solder connection (apart from the PIC itself), tested continuity all over the place, reflashed the TIA app a couple times, replaced the banksticks, and tried both MIOS Studio and the Max Manager to contact it while it's doing whatever it's doing. When powered up, it blinks MIDI In and Out, then MIDI In comes on and the volume LEDs do the pattern that means bankstick init. And there it stays, no matter how long I wait. I've started to suspect that maybe the PIC itself is bad, or has a badly sold
  3. Second status report: of the nine SIDs I'd salvaged from C64s through the years, seven boot up and make noise, two 8580s and five 6581s. I guess I'll need to get a SwinSID or something to fill this out, but that's actually a better ratio than I expected, so again I am delighted.
  4. I intend to build the control surface, too, and have gathered the case and most of the rest of the needed stuff, but this has been a slow burner so no telling when it'll be done.
  5. Very pleased to report that my 6582 has made its first noise -- notes played on the MIOS Studio keyboard trigger the one (so far) 8580 to play that lovely reedy default patch. This is delightful. Thanks for all your help so far, all y'all.
  6. Aha that's good info. I let it run for a while, like 20min, and it kept going, so I'm having the hypothesis that my banksticks are at fault. Knowing it's supposed to do that LED pattern, though, is heartening, we're getting somewhere at all finally. I tried that other firmware without any change. So to be clear, the one issue is that with one MIDI interface, it leaves the MIDI In LED on constantly. With another, it doesn't. Neither seem to respond to note-on or the like. I'll also try the Max manager. So far I've tried just the virtual keyboard that's part of MIOS Studio, witho
  7. This is the third re-edit of this post because the bootloader and MIOS and setup_tia_cartridge.hex have *finally* all been successfully loaded (I reflowed a couple sketchy-looking solder joints, reseated the optocoupler a couple times, suddenly all is well with MIOS Studio). So we're back to the initial problem, though with a new twist. The MIDI In LED is staying on constantly, and now the "level" LEDs are lighting up in pairs, descending from the red ones to the bottom green ones (video below). Further edit: Actually hooked the box's audio up to see whether it's working despite no
  8. OK good, I'll leave it alone. After a couple of false starts, I got my PICkit clone's six pins connected to the jumpers as per the illustration. I fired up MPLAB X IPE, selected device PIC18F4685, told it to power the PIC via the PICkit, connected successfully to the PIC, and selected bootloader_v1_2b_pic18f4685.hex from the mios_v19_h.zip archive from ucapps.de/mios_download.html. It programmed just fine, said it succeeded with no errors. My intent then was to get it talking to MIOS Studio to verify it was working, then upload MIOS itself and then finally the TIA app. But
  9. The green and white ones are correct, both pairs, and my meter tells me that the DIN pins and the DB25 pins for those are connected as you say. Weirdly, DIN pin2 isn't grounded, even though the third wire from the MIDI Out cable goes to that pin. I guess it didn't connect well when they made it, and I'm gonna have to take the connector apart more to debug that. Hmm I used my PICkit clone to reprogram the bootloader into the PIC, and MPLAB reported success. Now, though, when I put power to it while connected to MIOS Studio, it doesn't even give off the initial "f0 00 00 7e 40 00 01 f
  10. Am I right in seeing that the center pin of the MIDI Out DIN should be attached to pin 15 / ground of the DB25? That one is not, I'll look to fix it. The other four from the two MIDI DINs are correctly connected (ie, MIDI In seems to be hooked up correctly, unless it relies on the pin 15 / ground from the MIDI Out DIN). (Edit: Or is this the thing I vaguely remember where you ground the MIDI cable shield but don't attach it to one of the pins?) MIDI In isn't working, and I don't have a PIC burner for surface-mount PICs, so... not yet. Am I correct in thinking that th
  11. I've made it to the "power it up and see" phase of building the cartridge TIA box. When I do apply power, the LEDs for MIDI In and Out blink briefly, which feels like a booting-up indicator, and then the MIDI In light turns on and stays on. That seems like a bad symptom so I pull power immediately. I've tried reflowing some of the solder joints around the optocoupler's cluster of components and the DIN pins for MI+ MI-, also looking for solder bridges etc, but no luck so far. FWIW, MIDI Out is working as expected -- when I power it up connected to MIOS Studio, it sends the "f0 00 0
  12. Awesome, thanks. I'll see if I can suss out a way to add text while not making the top unprintable.
  13. Yeah, I've been on-again-off-again on doing this for... many years. Which is why I have a stack of the ancient 16-class PICs sitting around, I think I was first angling toward this in the SIDv1 days. I got the boards and the parts kit from SmashTV quite a while ago and then they promptly went into a drawer and then a moving box. Been opening a lot of boxes during the plague year, though, so it finally resurfaced. :)
  14. Oh this just isn't going to work -- having the raised lettering means you can't print lying on the front face, which means you need supports *everywhere* for the sides. I've attached my first-stab STL (not in love with where some of the text landed, meh), but I think this idea might be a non-starter, at least with my printer. fm box with text.stl
  15. Tinkering with this idea of adding raised text, and using Blender with some initial success. Haven't tried to turn it back into an STL yet. Anyone have a nice clean SVG copy of the sammichFM logo? Also, yeah, the original FreeCAD files would probably work better than trying to start with an STL, if you still have them around.
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