Re: I found it !. A very sorry looking MK14
I'm beginning to think it would be easier to design and build a new MK14. This hacked board of mine is giving me grief.
I've taken the 8154 out, and swapped the ceramic 8060 for a plastic one, just in case I make a slip.
Powered up, drawing 0.42A, looks OK. Clock is running, 8060 data lines all wiggling about. DB0-3 solid 0-5v, but DB4-7 show some 'half-way' levels. Not too worried about them yet.
Most address lines on 8060 look reasonable, but AD09,10,11 don't look happy at all.
I now need to find where these go. The SOC drawing is no use, because I completely re-hashed the address decoding, and most of it is now on that verowired daughter board !.
Wish me luck !.
Cheers,
Buzby
|