Re: Is it at all possible?

a bit back to the org subject

BOM:
https://docs.google.com/spreadsheets/d/1Gl0Q71u6fKLPRA9HQiSG8-xY8tPweMwXuy_UGQ1Iayo/edit?usp=sharing
Schematic: http://www.baltissen.org/images/c64.png

Best photo of a board so far:
http://myoldcomputer.nl/wp-content/uploads/2015/11/board-326298.jpg

I have got most of the discrete stuff sourced, thou i have a few
capcacitors i could not figure

Q's:


   - is mica and ceramic the same thing? i ask because i could not find a
   few of the ceramics but could find them as mica's
   - C106 is not on the BOM on page 22 in this PDF:
   http://www.zimmers.net/anonftp/pub/cbm/schematics/computers/c64/servicemanuals/C64_Service_Manual_314001-02_(1985_Feb)%20.pdf
      - but on the scematic on page 26 it is marked as 150pf but with a
      dashed box arround it. I looked at the board i just linked and could not
      find it anywhere. But can i assume that its just a ceramic?
   - The socket for the expansion port is also a no go so far, anyone know
   a shop that has them regular?
   - L4 is listed as a line filter of some sorts, but could not find any
   more info so far, anyone knows more about it?
   - RP4 anyone know what kind it is? BOM at the zimmers link says 10 pin
   so can it be assumed that its 5 individual resistors?

Things noted on the schematic from Ruud


   - Only one of the resistors in RP4 is connected on both sides, do i miss
   something here?
   - Same for RP3
   - there are a few BOM's in the service manual at zimmers, i used the
   first one but maybe that is not the right one?


Will do the chips tomorrow, rest of evening will be spent double checking
and look a bit more in the service manual


2017-02-14 8:29 GMT+01:00 Julian Perry <jp@digitaltapestries.com>:

> Hello GJPAA,
>
> Tuesday, February 14, 2017, 6:01:26 PM, you wrote:
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> *> Hallo Bo, >> First of all i wonder what board rev matches this
> schematic? > I have no idea. The source is the schematic in the well known
> Programmers Reference Guide. *As Hans has mentioned,  it looks very, very
> close to Rev 250407. Nothing was ever absolute with Commodore boards, but I
> think that's as close as you'll get. Commodore were always tinkering with
> the analog video and audio (particularly early on) so there may be some
> differences there.
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> *>> and if there are a high res scan "out there" i could use for initial
> component placement > Write me in private and I will generate a PNG with an
> higher > resolution. Or you can have the original files. Eagle can be >
> downloaded and you can create your PNG. And you can tinker with the SCH
> yourself. >> Next would part are ABSOLUTE not to be found no where? > These
> parts aren't that rare. Just ask around. >> and board layout > Hasn't that
> be done already? Several people have asked for the SCH before. *There was
> the C64 reloaded a short while back ( http://wiki.icomp.de/wiki/C64_
> reloaded ). Aside from cleaner video output I didn't quite see the point:
> but it's always nice to see the C64 candle burning bright !!
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> *> Hmmm, next thought: what about using the ATX format? >> Next, how much
> use would the work be in general? > Depends on your skills and experience.
> > Met vriendelijke groet / With kind regards, > Ruud Baltissen *>
> www.Baltissen.org <http://www.Baltissen.org>
> <jp@digitaltapestries.com>
> Message was sent through the cbm-hackers mailing list


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