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From: mcmahan@netcom.COM (Dave Mc Mahan)
Newsgroups: comp.sys.m68k
Subject: Re: Programming Roms/Eproms/Pla/etc
Message-ID: <1991Apr30.203046.6669@netcom.COM>
Date: 30 Apr 91 20:30:46 GMT
References: <91107.091241SCP100@psuvm.psu.edu> <1991Apr27.060346.25929@netcom.COM>
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Organization: Dave McMahan @ NetCom Services
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 In a previous article, mcmahan@netcom.COM (Dave Mc Mahan) writes:

[  Discussion about wanting to build a EPROM programmer and needing chip
   specs deleted.  ]


>Data I/O has literally hundreds (if not
>thousands) of supported part numbers listed in their books.  It would be
>especially nice of you to just read the EPROM ID code from a chip and select
>the appropriate alogorithm.  I don't know why Data I/O doesn't do this
>automatically, but they don't.  It KNOWS the proper ROM ID code for the 
>chip in the socket, why don't they just use the right algorithm?  I guess
>it could be difficult to even select the proper socket (the Data I/O 29B
>programmer has 6 or 8 sockets, all different sizes) and read the ID code
>without risking damage to the chip, but it would be nice if they could.

Well, sports fans, this is another time when I have the honor of following up
my own posting.  I did a little research on the above paragraph, and found that
a Data I/O programmer does indeed have the intelligence to properly program
an EPROM if you just stick it in the socket.  You don't _HAVE_ to enter the
family and pinout code for a new part, which can save you some time looking
up the desired value.

It turns out that if you enter the family/pinout code of 'FFFF' when asked,
the Model 29B programmer (from Data I/O) will correctly find the right
socket, figure out what part type is in there, and program it.

Just thought you might want to know.

>   -dave


  -dave


-- 
Dave McMahan                            mcmahan@netcom.com
					{apple,amdahl,claris}!netcom!mcmahan