EPROM manufacturer and device IDs

[Mike Rolica]

I pull them of too...cirus seems to leave allot of pin haging off the other
side of the board... I made a memcal with removeable prom from one..
Used a zippo to heat solder andslid hacksaw blade underneath, to pry it off
evenly....
Mike Rolica
Plant A,
Magnesium Products Division
Strathroy

(519)-245-4040  Ext. 244



	-----Original Message-----
	From:	Shannen at grolen.com [SMTP:Shannen at grolen.com]
	Sent:	Thursday, July 20, 2000 12:31 PM
	To:	gmecm at diy-efi.org
	Subject:	RE: EPROM manufacturer and device IDs

	GSorry, Mike.  You're not the first one to think of that one. ; )
I've
	been hitting the pc salvage stores around here for a while.  Old
cards
	are less than a dime a dozen.
	Now if ya can find the eprom holders.....
	Shannen
	M>I found a rich resource for eproms.....heh he he

	GM>Got about 500 used eproms now....
	GM>Found out that puters use them everywhere..  so I whent to my
buddies boxes
	GM>of used puter parts.. 386 and 486 motherboards use 2 256k eproms
for rom
	GM>high and rom low..
	GM>Also a lot of modems and vidio card use them.. so I've started
collecting
	GM>modems, video cards ect... been erasing like a bastard.. so far
they all
	GM>check out fine afeter erasure...:-)
	GM>Just some info for you real cheap guys like me:-) (either that or
ya can't
	GM>mail for mail order <grin>

	GM>Dad's gonna wonder why hydro bill is thru roof..

	GM>Oh btw.. before I had the eraser.... I used to go to the bank and
use their
	GM>counterfit checker.. took about 20min to erase.. after trial and
error... I
	GM>was told this doesn't work.. but it does!!!

	GM>He he eh ...I'm part portugues/part dutch/ and part
scotch......he hye he
	GM>hehmm

	GM>(I'm sure dopey is going" that's  aheluva good idea  huh hu hu
hugh heolp)
	GM>while doc is smashing a 730 against his head....repeating idiot
over and
	GM>over....) :-)

	GM>am I close??? Heh he

	GM>Mike Rolica
	GM>Plant A,
	GM>Magnesium Products Division
	GM>Strathroy

	GM>(519)-245-4040  Ext. 244



	GM>	-----Original Message-----
	GM>	From:	Ludis Langens [SMTP:ludis at cruzers.com]
	GM>	Sent:	Wednesday, July 19, 2000 6:03 PM
	GM>	To:	gmecm
	GM>	Subject:	EPROM manufacturer and device IDs

	GM>	Does anyone have a handy list of EPROM identification codes?
My new
	GM>	programmer can access, display, and check the codes, but it
doesn't
	GM>tell
	GM>	me what they mean.  I have to keep trying various
manufacturers and
	GM>	device types until the programmer doesn't complain (or turn
off the
	GM>checking).

	GM>	In a related matter, the EPROM codes have let me confirm
several GM
	GM>	vendor codes.  980 is Texas Instruments.  5012 is Intel.
014 is
	GM>	Fairchild and National Semiconductor.

	GM>	My latest batch of GM EPROMs contained a TI 27128, two TI
27C128's,
	GM>a
	GM>	Fairchild 27C256, and a NatSemi 27C32B.  The 27C32B has a
date code
	GM>from
	GM>	1992.  I have another 27C32B also from 1992.  Several other
vendor
	GM>014
	GM>	2732 type EPROMs in my collection don't contain an ID code.
This
	GM>means
	GM>	they might be a 2732, 27C32, or a 27C32H.  Two of these have
	GM>programmed
	GM>	just fine as 27C32H's.  The H suffix means a 27C32 that
programs
	GM>with 10
	GM>	ms pulses, instead of the normal 50 ms.

	GM>	FYI:  My old programmer couldn't program the 27C32B's.  They
program
	GM>	just fine with the new one.

	GM>	-- 
	GM>	Ludis Langens                               ludis (at)
cruzers (dot)
	GM>com
	GM>	Mac, Fiero, & engine controller goodies:
	GM>http://www.cruzers.com/~ludis/


	GM>	
	
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