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jbshocks
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« on: October 13, 2011, 09:12:33 PM »
So now that everything is good with my CEI machine I would kind of like to back up the eproms in case of future trouble.  My first trouble is that I know very little about eproms.  There are 3 of them  eprom 1 = 27c256-150jl  eprom 2 = TS27c64a and eprom 3 =M27128af1

Are these familiar to anyone?  Are they supported with any of the recommended burners?  To create a back up do I need the exact model eprom?  Can they interchange with other model eproms and if so what is the determining factor?  I see one with a reference to 5 V and another with 12.5v.
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coorslight115
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« Reply #1 on: October 13, 2011, 11:56:55 PM »
Quote from: jbshocks on October 13, 2011, 09:12:33 PM
So now that everything is good with my CEI machine I would kind of like to back up the eproms in case of future trouble.  My first trouble is that I know very little about eproms.  There are 3 of them  eprom 1 = 27c256-150jl  eprom 2 = TS27c64a and eprom 3 =M27128af1

Are these familiar to anyone?  Are they supported with any of the recommended burners?  To create a back up do I need the exact model eprom?  Can they interchange with other model eproms and if so what is the determining factor?  I see one with a reference to 5 V and another with 12.5v.

They are very popular eproms.
27c64
27c128
27c256

The 150 is the speed, you will want to stay with 150 or lower IE: 120, 100, 90 ect.

All modern burners support these as they have been around since the early 80's or older.

You can get good deals on them on e-bay. Don't spend more than $1.50 at the highest each
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jbshocks
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« Reply #2 on: October 14, 2011, 12:07:27 AM »
Thanks,  That clears up a bunch.
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knagl
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Kevin
« Reply #3 on: October 14, 2011, 01:45:04 AM »
Also, you don't have to actually copy your existing chip on to a new chip to back it up -- you can just copy the data on to your computer for backup purposes, and then burn a replacement chip in the future should you ever need to.   yes
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jasongd
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« Reply #4 on: October 24, 2011, 08:53:08 PM »
I use a Wellon VP280 programmer for my back up's.
This programmer will do your chips also, I got mine on Ebay.
Very easy to use.
Cheers.  wave
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dhellis
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« Reply #5 on: March 17, 2012, 02:01:42 AM »
Quote from: jbshocks on October 13, 2011, 09:12:33 PM
So now that everything is good with my CEI machine I would kind of like to back up the eproms in case of future trouble.  My first trouble is that I know very little about eproms.  There are 3 of them  eprom 1 = 27c256-150jl  eprom 2 = TS27c64a and eprom 3 =M27128af1

Are these familiar to anyone?  Are they supported with any of the recommended burners?  To create a back up do I need the exact model eprom?  Can they interchange with other model eproms and if so what is the determining factor?  I see one with a reference to 5 V and another with 12.5v.

Coorslight115 did tell you what the chips were but neglected to mention that the 5 volt and 12.5 volt readings are the programming voltages used.
Any cheap eprom programmer would program these.
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