CompuPro floppy controller differences
cclist at sydex.com
Tue Sep 19 22:46:22 CDT 2006
On 9/19/2006 at 11:45 PM ard at p850ug1.demon.co.uk wrote:
>Now, the data separator should be able to lock to an 8" SD data stream.
>It's the same bit rate as the 6.25" DD data it's supposed to be working
>with. And just about any pulse sequence that an occur in an FM stream can
>also occur in an MFM stream.
I'm unable to test the original 5150 FDC with this--I put it in an XT and
no interrupts. A little probing showed that U7, an MC3487 is bad on mine.
Not an IC in my hellbox, so the antique goes back on the shelf with a
sticker reminding me of the problem. I'm not inclined to hash up a
substitute (say a 74LS368) for it.
Someone else is going to have to try this.
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