Make OS3.9 ISO

[kolla]

Using dd on mac.

[kolla]

I thought the point of OP was that he has a CD and wants to make an iso of it, as backup, to simplify installations on emulators, FPGA systems or even real Amiga, or whatever. Who in this time and age bothers with spinning optical medium anyways? Must be more than a decade ago that I used a real CD drive on anything Amiga (apart from CDTV and CD32).

[kolla]

The real question you should ask is who uses floppies, because you still need those antiques to load the software you need to access the cd's and usb devices on our antique legacy platforms.

http://hxc2001.free.fr/floppy_drive_emulator/

it is an ageing product series :hammer:

[kolla]

Thanks guys. I own a copy of OS3.9 and needed to make an ISO that works. I got it working finally. The step I was missing on the Mac is after creating an CD/Disk master (.cdr) with Disk utility you need to convert it to ISO with the command from the terminal;
"hdiutil makehybrid -iso -joliet -o AmigaOS3.9.cdr AmigaOS3.9.iso"

Yeah, all that "mac magic" that can easily be avoided just by using dd in the first place

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dd if=/dev/diskN of=mycd.iso bs=10m where "diskN" corresponds to the disk device that is the DVD, the bs=10m is just so that it reads 10MB chunks at a time, instead of 512kB chunks, makes it faster.