Tech: Centipede hack/PCB revisions

[HarrySeven]

< ="-" ="text/; =us-ascii"> < name="Generator" ="MS Exchange version 6.5.7226.0"> [ukvac] Tech: Centipede hack/PCB revisions
I have just removed a faulty Centipede PCB from a cab...the monitor displays a yellow screen with a few jumbled characters.

On first inspection, the board looks to have been hacked, but the 2 x CMOS chips (4584B) at E/F 10 and 11 which have been replaced appear to be identical to the originals...EXCEPT it has this odd hack (see pics 1 & 2, front and reverse. Pic 3 shows the garbage on the monitor)

http://uk.geocities.com/urban_paranoia/Webfiles/bwcabster/centipede1.jpg
http://uk.geocities.com/urban_paranoia/Webfiles/bwcabster/centipede2.jpg
http://uk.geocities.com/urban_paranoia/Webfiles/bwcabster/centipede3.jpg

The replacement chips are labelled MC14584BCP (same as the originals).

So far, I have not investigated any further...before I do, I just wondered if anyone has ever seen anything like this before?

On comparing the PCB with a known working board, they appear different...some slightly altered tracks and a few extra components...does anyone also know anything re: Centipede PCB revisions? I haven't found much on the net so far.

Thanks in advance!






urban_paranoia2011-09-25 21:28:34

 

[eggwheatis]

Re: [ukvac] Tech: Centipede hack/PCB revisions
Hi, its not a mod, probably just a repair to broken
tracks. Often happens on atari boards when you remove
an IC you take the track with it!

Phil.

--- urban_paranoia1 <urban_paranoia1@btopenworld.com>
wrote: > I have just removed a faulty Centipede PCB
from a
> cab...the monitor displays a yellow screen with a
> few jumbled characters.
>
> On first inspection, the board looks to have been
> hacked, but the 2 x CMOS chips (4584B) at E/F 10 and
> 11 which have been replaced appear to be identical
> to the originals...EXCEPT it has this odd hack (see
> pics 1 & 2, front and reverse. Pic 3 shows the
> garbage on the monitor)
>
>
http://uk.geocities.com/urban_paranoia/Webfiles/bwcabster/centipede1.jpg
>
>
http://uk.geocities.com/urban_paranoia/Webfiles/bwcabster/centipede2.jpg
>
>
http://uk.geocities.com/urban_paranoia/Webfiles/bwcabster/centipede3.jpg
>
>
>
> The replacement chips are labelled MC14584BCP (same
> as the originals).
>
> So far, I have not investigated any further...before
> I do, I just wondered if anyone has ever seen
> anything like this before?
>
> On comparing the PCB with a known working board,
> they appear different...some slightly altered tracks
> and a few extra components...does anyone also know
> anything re: Centipede PCB revisions? I haven't
> found much on the net so far.
>
>
> Thanks in advance!
>
> Alan )
>
>
>
> [Non-text portions of this message have been
> removed]
>
>

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[John Bennett]

Re: [ukvac] Tech: Centipede hack/PCB revisions
Anyone have a mr do's castle board for sale ? bootleg considered

Darren



DATA Imported from archives: originally posted by darren nock (daz2dana@blueyonder.co.uk)