Pinout for SED9421

[Dwight K. Elvey]

>From: "Allison" <ajp166 at bellatlantic.net>

>>   From: woodelf <bfranchuk at jetnet.ab.ca>
---snip---
>
>>Did anybody ever use a serial chip and a data separater
>>rather than a floppy disk controler?
>
>Yes, many.  usually its a sync chip.
>
>Allison

Hi
 Besides the HeathKit hard sectored controller board,
used on both the H8 and the H89, Polymorphics also
used a serial chip to do data. In both of these
cases, as you state, they used synchronous serial
chips and not async.
Dwight