A couple of novice questions

[Wayne Blair]

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