Z80 home brew with FDC

Allison ajp166 at bellatlantic.net
Sun Sep 21 18:05:55 CDT 2008

>Subject: Re: Z80 home brew with FDC
>   From: Eric Smith <eric at brouhaha.com>
>   Date: Sun, 21 Sep 2008 14:43:09 -0700
>     To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org>
>Alexis wrote:
>> The other thing that puts me off is the data clock separator. How are you 
>> doing this?
>I can't speak for Andrew, but if you're not using an FDC with a built-in 
>  data separator, the easiest way to do it is to use the SMC 9216, 9229, 
>or 9239 digital data separator chips, some or all of which were 
>second-sourced by Western Digital.  Of course, they were obsoleted by 
>the newer FDCs with internal data separators.

It can also be done with a small amount of ttl.  Of course the 37C65 if 
you can find it or salvage it off an old PC floppy/ide board will be 
far lower parts count.



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