Brazilian computer dissected: CP200

[drlegendre .]

The 6522 should be generally available, just about anywhere via eBay. In
fact, the last batch I bought were Brazilian-made Rockwell chips, IIRC.

It's the 6526 that's the bugger. Even in the USA, we have to salvage them
from other C-64 machines, etc. eBay sellers often ask $25/each - you're
better off finding a donor C-64! They are easy to blow-out, too. Very
commonly they take a fatal blow when plugging a joystick, etc. They should
have used buffers between the game ports and the ICs.

Best,
Bill

On Fri, Jan 9, 2015 at 8:43 PM, Alexandre Souza <
alexandre.tabajara at gmail.com> wrote:

> Thanks Bill! The broken SX-64 was a loooong time ago, it wasn't even mine
> at that time (now it is! :oD). I don't know what happen, but ROM parts are
> more common to fail than EPROMs, this is well known. I don't remember
> exactely what happened, but was something around what you related, Screen
> comes up with some garbage but no cursor/welcome. 6522 are a pain in the
> back in Brazil, I have lots of friends with C64s without a good 6522 :( Oh
> my :(
>
> On Sat, Jan 10, 2015 at 12:38 AM, drlegendre . <drlegendre at gmail.com>
> wrote:
>
> > Hi Alex,
> >
> > Nice site, cool toys!
> >
> > I don't read Portuguese, but it looks like you +also+ had an SX-64 with a
> > bad kernal ROM? What's the deal with those, did they use some kind of
> > inferior part for the SX-64 ROM? It seems like they have a habit of just
> > going "poof" one day.
> > controllers
> > What was your symptom - screen comes up, with the correct color & border
> -
> > but no cursor or welcome message? That's what mine did. I also had one of
> > the two 6522 CIAs go out, which made the floppy unable to read discs.
> I've
> > heard that's also a common point of failure in the SX-64.
> >
> > -Bill
> >
> > On Fri, Jan 9, 2015 at 6:31 PM, Alexandre Souza <
> > alexandre.tabajara at gmail.com> wrote:
> >
> > >
> > >    Site is back! :)
> > >
> > > ---
> > > Enviado do meu Apple IIGS (pq eu sou chique)
> > > Meu site: http://www.tabalabs.com.br
> > > Meu blog: http://tabajara-labs.blogspot.com
> > >
> > >
> > >
> > >
> > > ----- Original Message ----- From: "Sean Caron" <scaron at umich.edu>
> > > To: "General Discussion: On-Topic and Off-Topic Posts" <
> > > cctalk at classiccmp.org>; "Sean Caron" <scaron at umich.edu>
> > > Sent: Friday, January 09, 2015 7:29 PM
> > > Subject: Re: Brazilian computer dissected: CP200
> > >
> > >
> > >  LOL! I guess that will help tick up the pageview count :O
> > >>
> > >> Best,
> > >>
> > >> Sean
> > >>
> > >>
> > >> On Fri, Jan 9, 2015 at 4:08 PM, Alexandre Souza <
> > >> alexandre.tabajara at gmail.com> wrote:
> > >>
> > >>
> > >>>    Oh my :(
> > >>>
> > >>>    My site appeared into a national magazine today, so bandwidth must
> > >>> have
> > >>> exceeded :(
> > >>>
> > >>>    Thanks for telling me!
> > >>>
> > >>> ---
> > >>> Enviado do meu Apple IIGS (pq eu sou chique)
> > >>> Meu site: http://www.tabalabs.com.br
> > >>> Meu blog: http://tabajara-labs.blogspot.com
> > >>>
> > >>>
> > >>>
> > >>>
> > >>> ----- Original Message ----- From: "Francois Dion" <
> > >>> francois.dion at gmail.com>
> > >>> To: "General Discussion: On-Topic and Off-Topic Posts"
> > >>> <cctalk at classiccmp.org>
> > >>> Sent: Friday, January 09, 2015 7:01 PM
> > >>> Subject: Re: Brazilian computer dissected: CP200
> > >>>
> > >>>
> > >>>
> > >>>  Ooops! www.tabalabs.com.br ->
> > >>>
> > >>>> http://www.hostinger.com.br/cpu_exceeded?tabalabs.com.br
> > >>>>
> > >>>> que coisa...
> > >>>>
> > >>>> Francois
> > >>>> --
> > >>>> http://raspberry-python.blogspot.com - http://pyptug.org - @f_dion
> > >>>>
> > >>>> On Fri, Jan 9, 2015 at 10:31 AM, Alexandre Souza <
> > >>>> alexandre.tabajara at gmail.com> wrote:
> > >>>>
> > >>>>  So bad it is so seldomly read, Sean. I hope I can get more
> pageviews.
> > >>>> It
> > >>>>
> > >>>>> is
> > >>>>> not for the money, but I hope all the work I have in photographing,
> > >>>>> creating the pages, etc...is useful for someone.
> > >>>>>
> > >>>>> On Fri, Jan 9, 2015 at 1:58 PM, Sean Caron <scaron at umich.edu>
> wrote:
> > >>>>>
> > >>>>> > Cool! I really enjoy your site, even if I can't read Portuguese
> :)
> > >
> > >>>>> Good
> > >>>>> > pics.
> > >>>>> >
> > >>>>> > Best,
> > >>>>> >
> > >>>>> > Sean
> > >>>>> >
> > >>>>> >
> > >>>>> > On Thu, Jan 8, 2015 at 9:47 PM, Alexandre Souza <
> > >>>>> > alexandre.tabajara at gmail.com> wrote:
> > >>>>> >
> > >>>>> > > Just in case someone is curious, there is another brazilian > >
> > >>>>> computer
> > >>>>> > > dissected, the CP200 (ZX81 clone) from Prologica
> > >>>>> > >
> > >>>>> > > www.tabalabs.com.br
> > >>>>> > >
> > >>>>> > > Greetings from Brazil!
> > >>>>> > > Alexandre
> > >>>>> > >
> > >>>>> >
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>
> > >
> >
>