[Coco] 6809EP - Worth it?

[J.P. Samson]

On Jan. 18, 2010, at 5:51 PM, Andrew wrote:
> I was browsing around a favorite local electronics surplus haunt of  
> mine, and found that they had a cache of MC6809EP processors, in  
> tubes of 5 or 6. The condition of the parts looked NOS; but other  
> than that, unknown.

I believe the CoCo used a 68B09E.  That 'B' indicates that it can  
operate at speeds up to 2 MHz.  A 68A09 runs at 1.5 MHz.  A plain 6809  
maxes out at 1 MHz.  I think the 'EP' refers to requiring an  
'e'xternal clock and that it uses a 'p'lastic package.  So my concern  
is that these chips you have found could not operate in the CoCo at  
the speed required.

-- JP