A couple of novice questions

[TBK]

This is what CE and OE are for.

TK
-----Original Message-----
From: Wayne Blair <wayneb at foxln.com.au>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Sunday, February 15, 1998 3:38 PM
Subject: Re: A couple of novice questions


>At 08:46 13/02/98 -0500, you wrote:
>>
>>
>>I've got a couple of "newbie" questions that came to mind...
>>
>>1) Is a modified ECM EPROM a violation of copyright? I know changing
>>the maps (data) might not be a violation, but I'd also have to carry a
copy
>>of the original microprocessor code too. Is this in the public domain or
>>is it just something no OEM bothers to enforce?
>
>
>I 'd like to know too !!
>>
>>2) Would it be possible to use a larger size EPROM and wire up some kind
>>of switch so I could hold the original maps and code, and a copy of the
>>modified maps in the upper area. Switching from one bank to the other
(with
>>the ECM unplugged of course). This way I could do semi-live comparisons or
>>revert back to the original maps if needed.
>
>It is down down here, eg stick a 256 in where a 128 was and pull up or down
>the top addr line. Getsmart us a PAL/GAL  and some logic a 10 way switch
>and only remap the data area and have 10 maps on line.
>
>>Might it make more sense to disassemble the code and have the firmware
point
>>to the original maps or the modified maps based on some toggle/flag/signal
>>(stomping on the gas peddle 3 times or flipping a switch or something...
>>whatever, you get the idea).
>
>The hardware is easier.
>
>wayne
>
>
>
>