[time-nuts] Maintaining boatanchors (was Capacitor Failures)

Bob Camp lists at rtty.us
Sat Oct 23 02:11:44 UTC 2010


Hi

There are a lot of the "goofy" rom's in the old gear. For what ever reason - they seemed to like the odd ones a lot ...

Bob


On Oct 22, 2010, at 10:06 PM, paul swed wrote:

> Actually there are great sub $100 programmers really like the GQ usb
> universal programmer. Handles all kinds of stuff and with an external supply
> many of the quite old eproms. It does not handle the really strange ones
> like I believe pmos.
> But then what does anymore. Oh the goofy programmer in the basement.
> Regards
> Paul.
> 
> On Fri, Oct 22, 2010 at 10:00 PM, bownes <bownes at gmail.com> wrote:
> 
>> Don't forget to scare up the appropriate programmer. Those are getting hard
>> to come by too.
>> 
>> 
>> 
>> On Oct 22, 2010, at 7:02 PM, Chuck Harris <cfharris at erols.com> wrote:
>> 
>>> I don't believe the parts are failing due to structural
>>> problems, but rather are just leaking down their buried charge.
>>> 
>>> It should be quite possible to refresh them by erasing them and
>>> reprogramming.
>>> 
>>> -Chuck Harris
>>> 
>>> Bob Camp wrote:
>>>> Hi
>>>> 
>>>> Find pin compatible replacement EPROM's while you still can. They don't
>> make all those small / slow / multiple supply
>>>> / parts any more.  Saves building all sorts of strange adapter boards as
>> well as re-shooting the memories.
>>>> 
>>>> Bob
>>>> 
>>>> 
>>>> On Oct 22, 2010, at 6:44 PM, Poul-Henning Kamp wrote:
>>>> 
>>>>> In message<
>> 1498648302.205602.1287785250803.JavaMail.root at sz0110a.emeryville.ca .
>> mail.comcast.net>,
>>>>> k6rtm at comcast.net writes:
>>>>> 
>>>>>> What to do? Pop out the parts and rewrite them? Dump them to disk as
>> well?
>>>>> 
>>>>> Make backup-copies while they have no problems.
>>>>> 
>>>>> -- Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20 phk at FreeBSD.ORG        | TCP/IP since RFC 956 FreeBSD
>>>>> committer       | BSD since 4.3-tahoe Never attribute to malice what
>> can adequately be explained by incompetence.
>>>>> 
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