[Coco] ceramics ...

[Mark Marlette]

At 9/4/2004 12:01 PM -0700, you wrote:

Kevin,

Good question for james. I'm not sure why they had so many different grades 
with such little base clock speed difference if you could just add a heat 
sink to it and over clock it. ?????  This is exactly what I was referring to.

Mark



>Hi,
>
>         What kind of heat sinking? Were they ceramics?
>
>         Lets back up a bit. From what I know they sold 3 speed grades of 
> the 6809:  6809 (1 MHz), 68A09 (1.5 MHz), and 68B09 (2.0 MHz). Are these 
> made different?
>
>                                         kevin
>
>jdaggett at gate.net wrote:
>>Mark
>>We used 68B09's at clock speeds of 12 MHz, 3 MHz buss speed 24/7 for 
>>months on end. Had little fail ure from that.
>>Yes it is quite possible to operate an 8 MHz 68K at 14 MHz. Again it may 
>>be necessary to heat sink the chip though.
>>james
>
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