Re: Programming Question

Frank,

If the first 32K of each ROM is correct, you could use a hex editor to edit the file by deleting the last 32K.

In the worst case, I can dig up a utility that I wrote a little while back that will shorten any input file to a specified size. It would do exactly what you need for the ROM.

That being said, I expect that your programmer will let you load the file for the 27256, see that it's 64K and simply truncate it to 32K. Have you tried that?

There may be a simple DOS command that will also do this for you, but I can't think of what that might be at the moment. Last time I had a need for this capability, it was easier to take 5 minutes to write the utility than it was to parse Microsoft's command line help. :-)

I suppose it doesn't hurt to ask the more obvious question.. Is this ROM for a game that's already been archived? If so, then you can easily get the correct image off the net without trying to recover yours. They will be the same bits.

Joel-

  ----- Original Message -----
  From: FZZAP@aol.com
  To: vectorlist@vectorlist.org
  Sent: Thursday, September 01, 2005 8:41 PM
  Subject: VECTOR: Programming Question

  Hi,

   This is a general programming question. I was coping some images from a game that used 27256 and 27512 eproms. I saved the images when I copied them and now need them for a game. The problem is I didn't change the device type when I copied them.

   So now the 27512 images work fine BUT
  the 27256 images do not work. They show a 64k images and should be 32k

   Is there any way to split the images in half ( I am assuming that it copied a double image when I did this.) Or is their no way to recover from this.

   Any help would be great.

   Thanks
  Frank

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Received on Thu Sep 1 23:54:07 2005