Recently, Somebody Somewhere wrote these words
> At 10:52 26.11.2005 -0800, Declan Moriarty wrote:
>
> >I
> >sent them a large bill for the last piece of messing (Which they won't
> >pay) so that suits me :-/. In those circumstances, it is a little
> >difficult to borrow their programmer.
>
> I'd say it's even easier: Go there, and take the programmer as payment :-)
That's the only thing that makes any money and they work for the
police. Justice in Ireland is often about who you know ...
>
> >ICT device 18CV8P. Old and new seem to be 150nS devices.
>
> OK, you *do* need a universal programmer, and you
> have to check carefully if it supports the ICT
> devices. I was really lucky in 1998 when my
> broker offered me more than 3000 units of those
> in PLCC20 package. I was the only bidder, because
> none of his customers was able to erase/program them - got'm dirt cheap ;-)
>
> Go check out pictures of my "IDE-fix express"
> product, each of the small boards has one of PEEL
> chips. The ICT devices have one drawback, they're
> a bit weak on the outputs (that's why the
> "express" portion of my product has a link
> between two outputs, so both pull to GND at the same time).
>
> BTW: These logic devices (PAL, GAL, PEEL, MACH)
> are much faster than Eproms. If the speed grade
> is -15, then it's not 150ns like on Eproms, but
> really 15ns. That's even a pin-to-pin delay, you
> can get a bit faster if you're routing
> internally: an advantage of the ICT devices, you
> can choose if the feedback comes from "before" or
> "after" the output flipflop, where regular GALs
> can only feedback from the output.
>
> AFAIK, ICT does not make these devices any more,
> and therefore does not offer the software any
> more. I still have a copy somewhere on the old
> DOS machine, contact me if you need it. It's a
> translator of GAL jedec files into PEEL jedec
> files, plus a fuse editor to make use of the additional features of the
> chip.
> The company might not be aware that PEEL chips do
> NOT eat the same jedec files as GAL chips.
You actually may have the solution there in this last paragraph.
These guys are real <expletive deleted>, with their heads in the
clouds and in the past. They are institutionalised beyond belief,
talking as if they know it all whereas they might have difficulty
in remembering which meter probe is negative :-/. What they do
have is access to documentation, which they can't release.
>
> As for Uwe Zimmerman's "no chance" posting, I
> guess the people who told you to find out the
> checksum were aware that you cannot read it if
> the security fuse is blown (the checksum is not
> written into the device, just a cross-check if
> the jedec file is valid). It's either they know
> the security fuse is not set (takes time to set
> it, so they might have skipped it to save money
> like Commodore did back in the days), or they are
> *really* asking for the user code, which can be
> freely chosen, and cannot be protected for obvious reasons.
>
> ciao,
Thanks very much for the above critical analysis which seems to
have exposed the source of the problem to me, at any rate. I saw
your device online and noted that little square. 20 pin plcc is
weird, isn't it?
--
With best Regards,
Declan Moriarty.
--
Author: Declan Moriarty
INET: [EMAIL PROTECTED]
Fat City Hosting, San Diego, California -- http://www.fatcity.com
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