Weird speed with Elbox 1200 ram

desantii

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Banned
Joined
Sep 24, 2009
Posts
68
Country
Chicago
Hi, this is just a weird speed reading I get when using an Elbox 1200/8 ram expansion in an A1200

When the jumper is set to sync, teh speed displays correctly in AIBB (14mhz)

When set to async, and I use a 40mhz crystal, it reads 33.2 mhz

Wehn I use a 43 mhz crystal it reads 34.2 mhz
When I use a 50mhz one there is no boot.

Just weird

thanks
 

Zoltar

New member
Joined
Apr 23, 2010
Posts
88
Country
Scotland
Region
Tayside
Hi dude, are you still using the FPU that was in it when I sold you it? 33mhz is the rated speed for that chip but i'd have though it would run at whatever speed the crystal told it to. Maybe it just doesn't take to being overclocked that well. I remember seeing 40mhz PLCC chips advertised for sale in Amiga mags years ago, you might still be able to find one. It would be interesting to see if that made a difference.

SJ

PS. I'm glad the card made it all the way over there lol.
 
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