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Re: ROM Editing
- Subject: Re: ROM Editing
- From: "Paul Grammens" <grammens@svn.net>
- Date: Thu, 21 Mar 2002 14:43:54 -0800
- Newsgroups: comp.sys.apple2
- Organization: Silicon Valley North, Inc. (http://www.svn.net)
- References: <3c96ef42$1@news.svn.net> <3C997EE7.82603173@buckeye-express.com> <3c9a1cc8$1@news.svn.net> <3c9a582d$1@news.uow.edu.au>
- Xref: archiver1.google.com comp.sys.apple2:18321
"David Wilson" <david@uow.edu.au> wrote in message
news:3c9a582d$1@news.uow.edu.au...
> >> Paul Grammens wrote:
> >> > Anyone have any pointers on how to hack ROM's?
>
> 1.Transfer contents to a disk file.
> 2.Run it through a disassembler.
> 3.Add comments and labels to code.
> 4.Add new code or modify existing.
> 5.Reassemble.
> 6.Burn new EPROM.
> 7.Test it.
>
> I did this with my first Cirtech SCSI card. It only supported up to 128MB
> disk drives and I had a 200MB unit. I have my own disassembler I wrote
that
> runs on UNIX. I found how it handled 1st 4 32MB partitions and added
similar
> code for next 4 partitions giving total of 256MB per disk. It worked
perfectly.
> --
Thanks for the tips, David. I've got step 1 done, and downloaded the
disassembler. Disassemblers must be platform-specific, right? Or maybe just
CPU-specific. Is there a better one than S-C Disassembler?
Steps 2 thru 5 are the tough ones, I've got the others covered.
-Paul