Oversized EPROM's & Multiple Programs
944Technologist
f_wilk at hotmail.com
Tue Jun 26 00:15:27 GMT 2001
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I have a DME operating with an external switch for 2 different programs =
on a single EPROM. One performance program and a second is the stock =
program. You have to power down to switch programs.
FR Wilk
84 944 Porsche
----- Original Message -----=20
From: Walter Sherwin=20
To: gmecm at diy-efi.org ; diy_efi at diy-efi.org=20
Sent: Monday, June 25, 2001 7:18 PM
Subject: Oversized EPROM's & Multiple Programs
To those who are using, or have used, oversized EPROM's that contain =
more than one program image........
Can you simply select between say Program "A" and Program "B" while on =
the fly, or do you have to power/idle down and then switch from one to =
the other? This would be for a two program solution in place of a =
single 27c256b chip, for a friend who has new young drivers in the =
family (think of it as a sort of valet mode). Is more than 2 images a =
big hassle in place of a 256 chip? The selector switch would be a keyed =
Allen Bradley jobbie.
Anyone have any interesting tidbits archived on this topic, on their =
HD's, that they can pass along? I'm going to dive into the list =
archives over the next few nights, but any direct pointers would =
certainly help a bunch.
Walt.
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<DIV>I have a DME operating with an external switch for 2 different =
programs on a single EPROM. One performance program and a second is the =
stock=20
program. You have to power down to switch programs.</DIV>
<DIV> </DIV>
<DIV>FR Wilk</DIV>
<DIV>84 944 Porsche</DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3Dwsherwin at home.com href=3D"mailto:wsherwin at home.com">Walter =
Sherwin</A>=20
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dgmecm at diy-efi.org=20
href=3D"mailto:gmecm at diy-efi.org">gmecm at diy-efi.org</A> ; <A=20
title=3Ddiy_efi at diy-efi.org=20
href=3D"mailto:diy_efi at diy-efi.org">diy_efi at diy-efi.org</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Monday, June 25, 2001 =
7:18 PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Oversized EPROM's =
& Multiple=20
Programs</DIV>
<DIV><BR></DIV>
<DIV><FONT size=3D2>To those who are using, or have used, =
oversized EPROM's=20
that contain more than one program image........</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>Can you simply select between say Program "A"=20
and Program "B" while on the fly, or do you have to power/idle =
down and=20
then switch from one to the other? This would be for a two =
program=20
solution in place of a single 27c256b chip, for a friend who =
has new=20
young drivers in the family (think of it as a sort of valet =
mode). Is=20
more than 2 images a big hassle in place of a 256 chip? The =
selector=20
switch would be a keyed Allen Bradley jobbie.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>Anyone have any interesting tidbits archived =
on this=20
topic, on their HD's, that they can pass along? I'm going to =
dive into=20
the list archives over the next few nights, but any=20
direct pointers would certainly help a bunch.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>Walt.</FONT></DIV></BLOCKQUOTE></BODY></HTML>
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