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buhler

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Posts posted by buhler

  1. Newbie looking for help starting a Midibox SID V2 minimal control surface.

    in MIDIbox SID

    Posted

    Is there anything else that I can order from him that I'll definitely need like midi jacks?

    Another quick question.

    I noticed in the FAQ regarding PSUs, they say that once you add an LCD you either need to use a second power supply or the optimized PSU.  Does that mean it will be best to just cannibalize an old C64?

    you may want to look into a DOUT kit as well...  as far as MIDI jacks, you won't be able to send and receive MIDI if you don't have a way to get it into and out of the box. ;)  also, the C64 PSU is external not internal so "cannibalizing" isn't necessary BUT it is necessary, if you have a C64, to take the SID out of it as the "SID Kit" from SmashTV doesn't come with a SID.

  3. Trafo question...

    in MIDIbox FM

    Posted

    hey guys, this shop is right down the road from my house and i thought i might give this transformer a shot.  i am pretty intimidated by the PSU part of this build. :-[  anyhow, will this transformer work?  thanks.

    [edit] looking at the pictures, i'd probably actually want this one...?

  5. A full-blown newb on the way to a POKEY synth

    in MIDIbox User Projects

    Posted

    Not to be like ancy and stuff but there hasn't been a whole lotta progress and stuff.  Just want to see how its going. ;)

    it may not hurt to actually build one of the finished boxes first i.e. MBSID.  that way you know what you are getting into and you'll understand all the work that goes into these things, AND it'll keep you busy for a while instead of waiting for unfinished projects to get done.  also, try to stay away from "ancy,"  it causes unexpected potties...

  8. Easy External Power Pupply

    in MIDIbox FM

    Posted

    oh guiseppi, you're always coming to my rescue!! ;D  if this works, it will solve my problem with finding PSU's for the MBAY and FM!  i don't have an amiga and i sure as hell wouldn't retire it if i did but i'm sure i can find PSU's somewhere...  would this PSU be the A500/1200 variety?

  10. 18F452 ID

    in MIDIbox FM

    Posted

    that would make the most sense seeing as you only have one core in an MBFM. ;D

    [edit] also, you may want to go with an 18f4685 (as i've learned) for future expansions in the firmware.  just a thought. ;)

  13. MBFM Bipolar Power Supply Kit

    in MIDIbox FM

    Posted

    I did buy one of those PSU's. But, I have not started on the MBFM, yet. It's collecting dust along with the two old sound cards I purchased on eBay that have the relevant MBFM chips. I'm going to tackle the MB6582 and Lemonhorse's AY-3-8912 before I work on the MBFM....saving the hardest one for last.

    If you have any questions about the PSU, I can dig it out and try to answer them or even take photos and post them here.

    no need for pics. ;D  i just wanted to know if you had actually purchase one, you know, to see if they were reliable/worth the effort.  thanks for the reply! :D

  17. A full-blown newb on the way to a POKEY synth

    in MIDIbox User Projects

    Posted

    Hmmm I had an idea.  So since the POKEY can accept pots and keyboard, would it be possible to build in a keyboard, and pots for parameter tweaking.  Then this would also solve my midi keyboard issue too! :P  I'm very uneducated so I don't know if it would work.  Thoughts?

    the problem with that is this:

    POKEY register table

    16 pokey registers - $D200–$D20F

    Register Write                                       Read

               Name         Description              Name    Description

    $D200 AUDF1 channel 1 frequency   POT0 potentiometer 0

    $D201 AUDC1 channel 1 generator   POT1 potentiometer 1

    $D202 AUDF2 channel 2 frequency   POT2 potentiometer 2

    $D203 AUDC2 channel 2 generator   POT3 potentiometer 3

    $D204 AUDF3 channel 3 frequency   POT4 potentiometer 4

    $D205 AUDC3 channel 3 generator   POT5 potentiometer 5

    $D206 AUDF4 channel 4 frequency   POT6 potentiometer 6

    $D207 AUDC4 channel 4 generator   POT7 potentiometer 7

    $D208 AUDCTL control over audio channels POTSTAT read of all 8 potentiometers port lines

    $D209 STIMER timer start KBCODE last pressed key code

    $D20A SKRES serial port status reset RANDOM random number generator value

    $D20B POTGO start port scanning sequence

    $D20C

    $D20D SEROUT serial port output register SERIN serial port input register

    $D20E IRQEN IRQ interrupts activation IRQSTAT IRQ interrupts status

    $D20F SKCTL control over serial port SKSTAT serial port status

    the same bit registers used for audio are also used for the potentiometers... i.e.  can't use both at the same time but possibly one after the other....  either way, there would have to be a processor that translated all this, including the keyboard (qwerty not musical) key presses, running along side the micro controller already in place with the MIOS app for the handling of the POKEY.  basically, if you want to go the route you are speaking of, you might as well get and atari 8 bit computer and a tracker...  sorry to be a downer.  :'(

    [edit] for poor chart alignment. ;D

  25. Which Pic?

    in MIDIbox FM

    Posted

    TK says the firmware (MBFM v.1) is running "fine" on the 18F4685 but everywhere else i have looked the MBFM is linked to the 18F452....?  i could be wrong (most likely) but isn't that what's recommended?  ???

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