[Gmecm] 16212488 ALDL MODE2/MODE3 bin dumping?

[Scot Sealander]

GM puts address restrictions in the ALDL code to keep you from reading
things that could cause problems.  You should be able to read the RAM ok
though. 

Scot

-----Original Message-----
From: gmecm-bounces at diy-efi.org [mailto:gmecm-bounces at diy-efi.org] On Behalf
Of Stefan Engh
Sent: Saturday, September 15, 2007 3:35 PM
To: gmecm at diy-efi.org
Subject: RE: [Gmecm] 16212488 ALDL MODE2/MODE3 bin dumping?

Sorry about getting above/below messed up... I was looking at the bin in a
hex editor.
 
I can only dump $4000-$FFFF. When trying to dump something in the
$0000-$3FFF range every address gets the value of the $FFFF byte. From what
I know the tables are located in the $4000-$FFFF range... $4000-$4001 Scan
ID, $4006-$4007 Checksum, $4008 Mask ID and so on. Haven't got a clue what's
in the $0000-$3FFF range and why it refuses to dump. I was hoping I would be
able to read the entire EPROM as if it was sitting in a programmer.
 
/Stefan