Quick Forth Question
ploopster at gmail.com
Tue Jan 24 08:20:38 CST 2006
David Betz wrote:
> Yes, but these weren't bent (at least by me). They plug into normal IC
> sockets in a carrier module that plugs into the side of the HHC. They
> aren't the ones that go inside and must have their pins wrapped around
> a plastic carrier. There was no evidence of repeated bending on any of
> the pins.
Hmmmm. Heat could do it, but I don't know of any reason why an EPROM
would get hot under any reasonable circumstances.
> On Jan 24, 2006, at 8:57 AM, Sridhar Ayengar wrote:
>> David Betz wrote:
>>> Okay, I figured out the immediate problem. Three of the pins on one
>>> of the EPROMs have broken off. One was hanging by a thread and fell
>>> off when I inspected it. I see no evidence that the pins remain in
>>> the sockets so I guess they must have fallen off when I removed the
>>> EPROMs to read them in my EPROM programmer. I suppose this suggests
>>> that they may have fallen off *before* I read them and that is why
>>> your SnapFORTH ROMs don't work. I don't think that's the case
>>> though because I'm sure I would have noticed that. Do EPROM (or
>>> chip pins in general) get more brittle as they get older? I've
>>> never had this type of problem before. These are gold colored (and
>>> plated I assume) pins if that makes a difference.
>> They definitely get brittle if repeatedly bent.
>> Peace... Sridhar
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