I've got a bunch of old CCSL and CSL datasheets on my website, at
http://wps.com/archives/solid-state-datasheets/index.html
The 9097 is there. It's funky old stuff!
tomj
On Wed, 2003-12-31 at 15:49, Bob Shannon wrote:
> Those are NOT DTL chips!
>
> Your looking at CTL logic, which uses a circuit similar to an uncommited
> emitter output rather than the
> conventional totem-ploe output stage.
>
> There are no drop-in replacements, and you cannot use DTL or TTL parts.
>
> Jay Jaeger wrote:
>
> > I have one I am working on -- attached to an HP 2114. The drive spins
> > up and can seek. The interface cards in the CPU pass their
> > diagnostics, but the controller is locking up -- looks like a problem
> > in the state flip flops that control the early part of a command.
> >
> > Also, my guess is that this one is 1.2MB, not 2.5MB. It has one
> > fixed platter and one removable platter. It also is exhibiting
> > head/disk interference ("ting") on unload, but so far doesn't seem to
> > be damaging anything when it does it (but I am using junk pack, just
> > in case -- can't tell if the ting is coming from the fixed or
> > removable platter).
> >
> > If you want to recover the data, you might consider putting the
> > platter into an RK05, doing an a/d and capture of the raw data (or
> > even the bit stream after recovery) from the pack. Might be safer.
> >
> > The logic in my IOMEC 1802 controller that is unhappy has Fairchild
> > chips -- not standard 74xx fare. It may well be that they are DTL
> > (sample markings on one are DT uL909759 7020), which I am currently
> > guessing is a 9097 chip.
> >
> > Jay Jaeger
> >
> > At 11:11 AM 8/26/2003 -0500, Tom Uban wrote:
> >
> >> Hello,
> >>
> >> Is there any chance that someone has an Iomec removable platter
> >> disk drive? The type that I am looking for uses an IBM 2315 style
> >> 2.5Mb cartridge, similar to an RK05.
> >>
> >> I know that this is a pretty futile request, but it never hurts
> >> to ask...
> >>
> >> --tom
> >
> >
> > ---
> > Jay R. Jaeger The Computer Collection
> > cube1_at_charter.net
> >
> >
> >
>
Received on Sat Jan 03 2004 - 04:30:25 GMT