Re: PLA equations for the 1551 drive's cart

From: Francesco Messineo <*francesco.messineo_at_gmail.com*> Date: Sat, 22 Feb 2025 13:24:23 +0100 Message-ID: <CAESs-_wU78_PYoHwy8dXsXayBqera5O+pJkUdkH-FP5hx5cxxQ_at_mail.gmail.com> · francesco.messineo_at_gmail.com

On Sat, Feb 22, 2025 at 1:00 PM <silverdr_at_srebrnysen.com> wrote:
>
>
>
> > On 21 Feb 2025, at 09:17, Francesco Messineo <francesco.messineo_at_gmail.com> wrote:
> >
> > Hi all,
> > I need to program a replacement PLA for a 1551 drive, of course I have
> > blank ICs.
>
> May I ask what exactly chips exactly do you have? And where can I get some? I mean if they are not the soviet ones, which I already have.

of course the soviet ones, that are now unobtainable too.
But luckily they always worked fine (except some random one that fails
programming) and I have (I hope) a lifetime batch.
PLS100/82S100 are almost extinct in the non-programmed state (but you
might want to try your luck on aliexpress).
93459 blank PLAs are easier to find (last time I've checked) but I
don't have any programmer that can handle them and the only known
programmer that supports them (at least for what I know) is rare and
expensive for those of us living in EU.

HTH
Frank IZ8DWF