PerSci 277 floppy drives

Vintage Computer Festival vcf at
Tue Mar 15 10:46:10 CST 2005

On Tue, 15 Mar 2005, Doc Shipley wrote:

> Randy McLaughlin wrote:
> > From: "Doc Shipley" <doc at>
> >>
> >>   Looks like a standard 50-pin edge connector, yes.  After reading a
> >> little in the owner's manual, it's MFM, dual density, so worst case I
> >> should be able to run it on an older PC-based FDC, right?
> >
> >
> > The 277 is a fast repeat fast single sided floppy drive.
> >
> > The high-speed seek can be ignored but what can not be ignored is the
> > track location.  Being a dual drive both heads move at the same time,
> > this can confuse some software.
> >
> > Details on making a 34 to 50 pin cable can be found on my website.
>    I've looked at that, but I don't have access to crimpers.  Would the
> line noise from a soldered strip-&-splice be excessive?

The IDC connectors are forgiving with even crap tools.  Just use a vise,
some vice grips, or if you are lazy like me and don't want to fetch the proper
tools, a blunt object with which you can hammer on the cap works.  I start
from each end until they are punched down, then finish the job by working
from the middle outwards until the top of the connector is attached nice
and firmly.


Sellam Ismail                                        Vintage Computer Festival
International Man of Intrigue and Danger      

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