(Data I/O), so much more reason to be careful. Possibiliies are infinite and
have to watch for fine print (manufacturer, IC revision, algoritham revision
etc.), or you will fry the PROM.
Regards
Miroslav Pokorni
toggle quoted message
Show quoted text
----- Original Message -----
From: "Bruce Lane" <kyrrin@...>
To: <tekscopes@...>
Sent: Monday, March 08, 2004 5:40 AM
Subject: Re: [TekScopes] Another new file
Hi, Miroslav,
* REPLY SEPARATOR *
On 07-Mar-04 at 23:08 Miroslav Pokorni wrote:
Oh, 2732 will work, just make sure that un-used address bit (A11, pin 21)
is
nailed down, so that it is lower half of PROM that is read. As for 2764,
that is a different proposition because it is 28 pin DIP (four pins more
than 2716 or 2732), but doing a jerry rig to translate pins would make it
usable.
You have also to watch programing voltage. Some of early PROMs used 21V,
then came 15 V, then 12 V. You can program 12V device on 15V programmer
setting, but there is no promise that device will not be damaged.
<g> Programming is the least of my worries. When Data I/O designed the
Unisite, they designed it to be 'pin driven.' This means that each pin is,
according to whatever algorithm you're using, automatically and accurately
programmed for Vpp, Vcc, and a bunch of other alphabet soup as needed.
Thanks for the heads-up.
-=-=-=-=-=-=-=-=-=-=-=-
Bruce Lane, Owner & Head Hardware Heavy,
Blue Feather Technologies --
kyrrin (at) bluefeathertech do/t c=o=m
"If Salvador Dali had owned a computer, would it have been equipped with
surreal ports?"
