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Well done! And... you didn't use an 8-bit PIC :-) ? I am doubly impressed!

For fun I wrote a version of DumbDD in THINK C 5. It's <4kB and fairly crude. I transcribed the Forth routines from MacTech I linked earlier, but I have almost certainly made mistakes. I tried it on miniVMac with the actual SCSI writes blocked out (and a delay of 2/60ths of second between each...

OK, no worries! The DumbDD thread is the best route then and there's an alpha-quality app for it!

and (@jjuran ) does MacRelix have dd built-in? Would it be able to copy a raw .iso file to a SCSI device (e.g. the equivalent of dd if=myIso.iso of=/dev/sda0 )?

Except it'd be {0x39, 0x38} =14,648. So, 65535 => (65535-14648)/10000+9.8=14.8.8b9. Whoops, I had managed to make two mistakes! Now you only get 1 build digit, but you gain 3 feature and 1 bug-fix versions.

Hmmm. This has just set me thinking. My original Performa 400 came with 7.1p. Are we saying it was actually 7.1.2p, but About This Macintosh.. just displayed "7.1P"? I've lost count of the number of companies I've worked at which screwed up version control for embedded products, leading to a...

Aaah, OK. I'd looked at the web page talking about this and then forgot about it. So, perhaps that solves one problem: it results in a merged .iso . In this case, the .iso would be about 1.932GB I think, less than 2GB. Sorry about that. This is from...

Correct! That's the idea. The whole installation is on 3 CDs. So, the first .iso would contain the normal .iso partition table and the PA-RISC system should boot from it and won't see the other CDs, but that's fine. For the Debian installation, I understand that the first .iso is the core...

Hi @Phipli ! The whole idea is that they're raw images without an APT (I don't need the Mac to mount it after). In my case, an install .iso (Debian 5) to be copied as a .iso to a SCSI HD for a PA-RISC system. The .iso is probably 644MB, but the SCSI HD is likely 2GB. Does this help?

So, if I created a blank .img without a partition map I should be able to mount it on Dingus PPC; then run @saybur 's scuzImager to write a .iso to it. We don't know if it'd save it properly, but I could use scuzImager again to write it to another .iso and then compare them? Also, @saybur : if...

I guess there are PC ROM BIOSes (or EFI, or UEFI) to do that. On the Mac side we had direct ROM support for the Sony FD, then SCSI (but not specific SCSI media, as discussed earlier) and this took us to the cheapo 2-bpp, PowerBook 150 which I think was the first Mac to support IDE. The PB150 is...

Perfect, well done! I did wonder if someone would beat me to it, but I thought .oO( I might as well fish for a level of interest. Besides, it'll take ages for someone to write something). LOL! [ ".oO( ... )" is my symbolism for thinking, it's an ASCII thought-bubble]. I thought this was because...

Or it could be the roller. The rubber gets worn and can slip on the inner metal rod too. You can use dd in Linux or on a Mac to copy a HD image directly to an SSD. The command will look something like dd if=myImage.imgOrIsoOrWhatever of=/dev/sdMySSDorSD . This is possible if you have an SSD or...

I had similar problems a while back here's my technique for force ejecting CDs: https://68kmla.org/bb/threads/g3-imac-ate-a-cd.46654/post-521901 I fixed a broken CD-RW drive in an iMac G3 using rubber bands: https://68kmla.org/bb/threads/no-go-snow-imac-g3.47697/post-535635

Hi folks, I've tried to ask about this a couple of times, with little response except for a suggestion to try FWB. However, in another post I found FWB CD Toolkit crashes with a Type 3 error. So, I thought I'd write (what I imagine to be) a fairly simple utility to do what I want: DumbDD, since...

This is much like my PB1400 story. I bought a PB1400cs/117/16 in late 2022. https://68kmla.org/bb/threads/powerbook-1400cs-serial-port.42735/ It was originally in a fairly sad state: no FD nor CD-ROM, original & cranky HD 750 running System 7.5. I cloned the HD to an 8GB µSD card (+adapter)...

Maybe I have FWB HD Toolkit.

Apologies, I thought I'd bump this back up, because I think having the equivalent of dd on a classic Mac OS talking to a SCSI drive is generally useful and one of these tools might do that already.