Quick Forth Question

Sridhar Ayengar 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.

Peace...  Sridhar

> 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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