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alchemist

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Posts posted by alchemist

  1. Hello,

     

    The family's 6581 was dead, as was the C64 (electric shock from a desk lamp).

    I got an other 6581 from eBay and I have a working minimal set-up:

    20140124-MIDIbox_SID_Minimal_Working.png

     

    The next step will be to build the full control surface and put all that stuff in a box (probably a C64 from a friend, so that I will have a stereo set-up)

     

    BIG BIG THANKS to Thorsten who is so patient and answers to all my dumb questions !

  2. Hello,

     

    I am almost at the end : I have no sound on the MBHP_SID except a small noise like "computer sound".

    I checked the connections with the interconnection app, and everything is OK (I had 3 pins not working and fixed them).

     

    I don't see a "next check if it fails" in the walktrough... what can I do now?

     

    I have a "plan B": since I will have a stereo setup, I will solder the second plate and test it. But plate #1 should also be fixed ;)

  3. FYI: the soldering was such a mess (done with a too wide soldering tip) that I ordered an other CORE module. I've  just built it this evening (with a fine soldering tip), and the MIDI I/O are now OK and really stable (I could upload the OS and applications many times).

     

    The voltages are OK on both boards (CORE and SID).

    I still have no sound, but I will check the interconnections and will connect the LCD display.

  4. Hello,

     

    Thank you for your reply.

     

    I did read the walkthrough manual, but I thought the SID aplication archive was the OS + the application.

     

    I will also plug the diode, but I have now a MIDI IN problem : the upload fails, the MIDI Out sends good Sysexes, but when I do the loopback test (replace PIC by a jumper at RX/RX), the returning output is completely corrupted, and this was not so before. This was maybe due to my last checks, I did reintroduce "bugs" in the soldering... I was too enthusiastic, and did it late in the evening... not good.

     

    But I learn a lot, and my motivation is really high :) But I have to manage the time to play with soldering with family ;)

  5. Hello,

     

    My SID box is almost working (MIDI I/O, voltages & ground measures on MBHP_CORE and MBHP_SID PCBs), but I have no display (just a black line) and no sound.

     

    I tested the LCD with a 40x2 and a 16x2, both results. Both are normally compatible with the default Hitachi Driver (the 16x2 comes from my Arduino kit and working, the 40x2 is from voti.nl).

     

    So I have 2 blocks of questions

     

    1. LCD

    • For the SID applications, I should only use 4 bit data (4-7). The SID manual don't seem to tell to use a 1k pull-up resistance on D3. Do I need to do it?
    • Will the LCD display "READY" only when all is OK? or do I have to check something?
    • To use the test application, do I need to do it with or without the LCD connected?

    2. SID

    • Do I need to remove the 6581 for the SID connection test application?

    Thank you for the support!

  6. Hello,

     

    I fixed 2 short-circuits (I had a too big soldering tip at that time) and probably 2 cold solder.

    Before the fixes, it was only 0xFF, and now, it changed, but when I reply (and checked again some soldering), it's again 0xFF

     

    I don't see always messages in the MIDI monitor, but my MIDI interfaces LEDs are always on.

     

    With MIDIOX, I see at the moment some 0xFF's when I power off the core module.

     

    I will recheck the components and soldering saturday. I will find it !!!

     

     

    When I replug the MIDI cable, the MIDI messages change : CC's, Note On, Note Off...

     

    Example from MIOS Studio Linux

    Scanning for MIDI Inputs...
    [1] Midi Through
    [2] MIDIMATE II (1)
    [3] MIDIMATE II (2)
    MIDI Monitor ready.
    [10202.628] c0 78   Chn# 1  Program Change 120
    [10202.632] ff
    [10203.555] e1 00 00   Chn# 2  Pitchbend -8192
    [10207.340] e1 00 00   Chn# 2  Pitchbend -8192
    [10211.125] e1 00 00   Chn# 2  Pitchbend -8192
    [10214.910] e0 00 00   Chn# 1  Pitchbend -8192
    [10218.695] e0 00 00   Chn# 1  Pitchbend -8192
    [10221.845] ff
    [10221.845] ff
    [10221.846] ff
    [10221.847] ff
    [10221.849] ff
    [10221.850] ff
    [10221.851] ff
    [10221.854] ff
    [10221.854] ff
    [10221.855] ff
    [10222.791] e0 00 00   Chn# 1  Pitchbend -8192
    [10226.576] e0 00 00   Chn# 1  Pitchbend -8192
    [10230.361] e0 00 00   Chn# 1  Pitchbend -8192
    [10234.146] e0 00 00   Chn# 1  Pitchbend -8192
    [10237.931] e0 00 00   Chn# 1  Pitchbend -8192
    [10241.716] e0 00 00   Chn# 1  Pitchbend -8192
    [10245.501] e0 00 00   Chn# 1  Pitchbend -8192
    [10249.286] e0 00 00   Chn# 1  Pitchbend -8192
    [10253.071] e0 00 00   Chn# 1  Pitchbend -8192
    [10256.856] e0 00 00   Chn# 1  Pitchbend -8192
    [10260.641] e0 00 00   Chn# 1  Pitchbend -8192
    [10264.426] e0 00 00   Chn# 1  Pitchbend -8192
    [10268.211] e0 00 00   Chn# 1  Pitchbend -8192
    [10271.996] e0 00 00   Chn# 1  Pitchbend -8192
    [10275.781] e0 00 00   Chn# 1  Pitchbend -8192
    [10279.566] e0 00 00   Chn# 1  Pitchbend -8192
    [10283.351] e0 00 00   Chn# 1  Pitchbend -8192
    [10287.136] e0 00 00   Chn# 1  Pitchbend -8192
    [10290.921] e0 00 00   Chn# 1  Pitchbend -8192
    [10294.706] e0 00 00   Chn# 1  Pitchbend -8192
    [10298.491] e0 00 00   Chn# 1  Pitchbend -8192
    [10302.276] e0 00 00   Chn# 1  Pitchbend -8192
    [10306.061] e0 00 00   Chn# 1  Pitchbend -8192
    [10309.849] e0 00 00   Chn# 1  Pitchbend -8192
    [10313.632] e0 00 00   Chn# 1  Pitchbend -8192
    [10317.417] e0 00 00   Chn# 1  Pitchbend -8192
    [10321.202] e0 00 00   Chn# 1  Pitchbend -8192
  7. Hello,

     

    [EDIT: changed pin 26->25, this is a TX problem]

     

    I checked the soldering and Vdd, ground. Everything seems OK now  except on pin 25 (Tx).

    I have 5 V on the PCB at the soldering of pin 25, but 0.8V on the pin 25 itself. I checked that the soldering is OK and I got continuity between the PCB and the pin.

     

    And the MIDI out messages are still garbage (FF, control change, or note off).

     

    The main.hex of mios_bootstrap_picstart_workaround_v1.zip cannot be uploaded (checksum error).

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