Re: PLA equations for the 1551 drive's cart

From: Francesco Messineo <francesco.messineo_at_gmail.com>
Date: Sat, 22 Feb 2025 18:28:31 +0100
Message-ID: <CAESs-_yJj5cnatLykEaMnipkjipuQ84-z6VtgSLzDLPS2Eu+Bw_at_mail.gmail.com>
On Sat, Feb 22, 2025 at 6:12 PM Mario Kienspergher <contact_at_kinzi.net> wrote:
>
> I did not program them by myself.
> IIRC it was a TopMax III, but I can't say for sure ATM. Would have to ask.

I would think it's a programmer issue likely, they couldn't even
figure out the correct fuse order for the input terms after all.
I program them with a Data I/O 2900. I know other two persons using
regularly the soviet clones and programming them with another Data I/O
2900 and a Hi-Lo All-07. Both of them never reported to me any failure
after programming, but I've been told that some ICs fail programming
like I've experienced myself.

>
> Had two of them in the 1551-Paddle, both of them died after some time.
> One of them took a 8501 with it, unfortunately. :-(

I've never seen a good 8501 in my whole life so far. I have made a
replacement for it with a 6502 and 2 x ATF1502 CPLDs, this is barely
larger than the 8501 itself. But I only have one C16 that was donated
many years ago by a friend.


> But this is just my humble experience, not a valid wide field study.
> However, this took me to the idea of the redesigned paddle.
>
> Am 22.02.25 um 17:46 schrieb Francesco Messineo:
>
> On Sat, Feb 22, 2025 at 1:56 PM Mario Kienspergher <contact_at_kinzi.net> wrote:
>
> The soviet ones seemed very unreliably to me.
> Programming was fine, but they suddenly failed after some time.
>
> I haven't seen one failed yet. I've programmed them for other people
> too since some years now, no failure ever reported.
> What programmer do you use?
>
> Frank
>
>
Received on 2025-02-22 19:00:18

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