Replacment for INS1771 FD controller

Chuck Guzis cclist at
Fri Apr 28 21:35:27 CDT 2006

On 4/28/2006 at 8:23 PM Kelly Leavitt wrote:

>I'm lazy tonight. Are there any pin compatible replacments for this chip?
>It is the SD floppy controller on my TRS-80 EI. It is very sick...
>Any sources for 1771 anywhere. I see lots of 197x available.

WD1771's weren't uncommon, so you might still be able to locate a pull.
But it is a 30-year old chip...

Alternatively, a WD1791/1792/1795 is very close in pinout and command set
compatibility and probably could be made to work with a little tweaking.


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