[Coco] Floppy Controller chips

[Bob Devries]

Hi Gene,

> Not a lot of use, I have a controller with the fujitsu chip in it, but its
> a 2793, the 2773 is a 28 pin chip IIRC.  Software compatible, but not 100%

Actually that's a WD1773. Tandy also used WD1793, but those required some 
external chips.

I have controllers (locally made) which use the WD2793. It needed an 
Oscilloscope to set up.

IMHO, the WD1773 is the easiest to use... just plug & play :P

Regards, Bob Devries
Dalby, QLD, Australia

----- Original Message ----- 
From: "Gene Heskett" <gheskett at wdtv.com>
To: <coco at maltedmedia.com>
Sent: Tuesday, July 23, 2013 9:31 AM
Subject: Re: [Coco] Floppy Controller chips


> On Monday 22 July 2013 19:29:14 Arthur Flexser did opine:
>
>> I seem to recall that the Fujitsu MB8877A disk controller chip was at
>> least more or less compatible with the WD ones used in the CoCo, though
>> I think there were some minor differences.  I know I used one for a
>> while, though I don't remember what model controller I had at the time.
>>
>> A quick google found a place that has used pulls for $12.50:
>>
>> http://usedicchips.com/product/fujitsu-mb8877a-floppy-disk-controller-40
>> -pin-socket-pull/
>>
>> Art
>
> Not a lot of use, I have a controller with the fujitsu chip in it, but its
> a 2793, the 2773 is a 28 pin chip IIRC.  Software compatible, but not 100%
> hardware.
>
>>
>> On Mon, Jul 22, 2013 at 6:20 PM, Bruce W. Calkins
>> <brucewcalkins at charter.net
>>
>> > wrote:
>> >
>> > Supplies for those were pretty much dried up 15-20 years ago.
>> > Bruce W.
>> > =====================
>> >
>> > ----- Original Message ----- From: "Brian Goers"
>> >
>> >  Are Floppy Controller Chips (WD1773) available? Or a suitable
>> >  replacement?
>> >
>> >> It's for a second controller that I have. Mine is still working.
>> >> Thanks
>> >>
>> >> --
>> >>
>> >>  Brian Goers
>> >
>> > --
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>> > net/mailman/listinfo/coco>
>>
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>
>
> Cheers, Gene
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