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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: MrZammler on April 05, 2008, 09:28:42 AM

Title: Anyone knows what this is?
Post by: MrZammler on April 05, 2008, 09:28:42 AM

Just got an A2088XT from a friend, and noticed a small pcb with what appears to be crystals, glued on top.

http://www.amigahellas.gr/modules/myalbum/photo.php?lid=381&cid=4

(click on the pic for a larger version)

Anyone might know what this is for? A bench I tried still mentions the 8088 running at stock 4.77Mhz

Thanks!

Title: Re: Anyone knows what this is?
Post by: da9000 on April 05, 2008, 09:35:43 AM

Haven't seen it before. Mine doesn't have it, but your guess about overclocking is what my guess would be as well!

Question is: what do the crystals say?

Title: Re: Anyone knows what this is?
Post by: MrZammler on April 05, 2008, 09:37:47 AM

Hard to tell. They are covered in black paint! Tried scratching a bit, but couldnt make out.

Title: Re: Anyone knows what this is?
Post by: da9000 on April 05, 2008, 10:05:09 AM

Oh crap, I thought it was the angle of the photo showing a highly reflective surface (like a mirror).

X-ray glasses? :-)

Title: Re: Anyone knows what this is?
Post by: Argus on April 05, 2008, 12:45:29 PM

It's probably a turbo switch or something similar.  I believe the 2088 is overclockable so that's probably a software switchable board to kick in a turbo mode (not that'd make a huge difference nowadays).

Title: Re: Anyone knows what this is?
Post by: Nlandas on April 05, 2008, 01:04:41 PM

They look like clock chips to me for over-clocking as stated.  Can you run the BB and see what clock it's running at?

Title: Re: Anyone knows what this is?
Post by: mike- on April 05, 2008, 01:14:21 PM

Overclocked bridgeboard?
Maybe i really should try reading the whole post before squirting out an answer ^^