CP-M Z80 home brew computer circuit board
ajp166 at bellatlantic.net
Sun Jun 15 18:35:46 CDT 2008
>Subject: Re: CP-M Z80 home brew computer circuit board
> From: "Roy J. Tellason" <rtellason at verizon.net>
> Date: Sun, 15 Jun 2008 17:22:48 -0400
> To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
>On Sunday 15 June 2008 16:43, Chuck Guzis wrote:
>> From: "Andrew Lynch"
>> > Implementing floppy IO can take on many variations and picking the FDC
>> > is just the first of many challenges [FDC1793? NEC765? SMC9266?
>> > WD2797?]. What about the data separator? Few chips remain and viable
>> > sources are scarce. Even integrated FDCs with built in data separators
>> > are not readily available.
>> The WD1770/1772/1773 is still my favorite "almost no external
>> circuitry" chip, but they're getting harder to find, in spite of
>> being used on Atari and Commodore boxes. You don't need to buffer
>> the floppy interface and the things have integrated data separators--
>> and come in a 28-pin package.
>I thought it was the 179x parts that had the data separator on-chip, no?
No. 1770 did as did 2793...
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