Is there any way to import/replace files in Amiga ISOs?

MethodGit · 29 July 2012, 10:21

I'm just wondering if there's a much easier way of replacing specific files on an CDTV/CD³²/AmigaCD ISO image without having to rebuild the entire thing from scratch. I thought CDmage would do the trick (the beta has an "Import" option) but it seems to be confused by the Amiga's specific CD format - and since it was last updated more than a decade ago, I'm not holding my breath for improvements!

Because of the Amiga filesystem's silly checksum insensitivity it doesn't seem you can get away with chucking the ISO itself into a hex editor and modifying your targeted values that way. Rebuilding a CD from the ground up sounds pretty tedious and I'd prefer to try and keep the original LBA structure by any means possible.

If not anything on the PC side, is there anything on the Amiga side I could use for this occasion?

Toni Wilen · 29 July 2012, 11:03

You should be able to directly edit isos if they are in 2048 byte sector format.

Other CD image formats (including >2048 byte sector isos) include CD checksum and/or error correction data.

I think CDMage can be also used to fix checksum and error correction data.

jeff b00toNic · 29 July 2012, 13:01

You could try "UltraISO" it has a file import function.

Retro1234 · 29 July 2012, 13:20

i know when ive tried it with magic iso its no longer bootable havent looked any further but be intrested if you find a way

29 July 2012, 10:21	#1
MethodGit Junior Member Join Date: Dec 2002 Location: The Streets Age: 40 Posts: 2,731	Is there any way to import/replace files in Amiga ISOs? I'm just wondering if there's a much easier way of replacing specific files on an CDTV/CD³²/AmigaCD ISO image without having to rebuild the entire thing from scratch. I thought CDmage would do the trick (the beta has an "Import" option) but it seems to be confused by the Amiga's specific CD format - and since it was last updated more than a decade ago, I'm not holding my breath for improvements! Because of the Amiga filesystem's silly checksum insensitivity it doesn't seem you can get away with chucking the ISO itself into a hex editor and modifying your targeted values that way. Rebuilding a CD from the ground up sounds pretty tedious and I'd prefer to try and keep the original LBA structure by any means possible. If not anything on the PC side, is there anything on the Amiga side I could use for this occasion?

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29 July 2012, 11:03	#2
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,553	You should be able to directly edit isos if they are in 2048 byte sector format. Other CD image formats (including >2048 byte sector isos) include CD checksum and/or error correction data. I think CDMage can be also used to fix checksum and error correction data.

29 July 2012, 13:01	#3
jeff b00toNic Registered User Join Date: Nov 2011 Location: Arnsberg Germany Age: 45 Posts: 197	You could try "UltraISO" it has a file import function.

29 July 2012, 13:20	#4
Retro1234 Phone Homer Join Date: Jun 2006 Location: 5150 Posts: 5,809	i know when ive tried it with magic iso its no longer bootable havent looked any further but be intrested if you find a way

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