Search found 415 matches

by ZrX
Sat Mar 27, 2021 3:22 pm
Forum: Support
Topic: Weird disk format
Replies: 8
Views: 236

Re: Weird disk format

The dump has the same data on both sides so you should flip the disk over to read the other side. As the drive only has single head KryoFlux will read the same data for both sides without flipping the disk. But the format itself is a really weird one. A single 1024 byte sector seems to hold 4 256 by...
by ZrX
Thu Mar 18, 2021 7:55 am
Forum: Dumping
Topic: Motorola VERSADOS 5.25" FD imaging
Replies: 5
Views: 221

Re: Motorola VERSADOS 5.25" FD imaging

have been trying and get everything (16 MFM 256 byte sectors) except side 0 first track using MFM. the ones in green seem to be virgin sectors from original disk formatting and written sectors have artifact data in formatting headers even using FM on this S0T0 yields nothing except a mismatch error...
by ZrX
Wed Mar 03, 2021 7:37 pm
Forum: Dumping
Topic: Dumping Help
Replies: 7
Views: 192

Re: Dumping Help

Yup, it's a protection.

The track has 10 sectors instead of 9. Header states the last sector is #0, the usual 512 bytes but only has 256 bytes of data "DEM012345678 + some extra bytes" and a bad checksum.
by ZrX
Mon Feb 22, 2021 11:08 am
Forum: Dumping
Topic: Dumping and Emulation Issue
Replies: 15
Views: 370

Re: Dumping and Emulation Issue

Matter of perspective. How the disk is built vs how the controller sees the disk.
by ZrX
Mon Feb 15, 2021 7:37 pm
Forum: Dumping
Topic: Dumping and Emulation Issue
Replies: 15
Views: 370

Re: Dumping and Emulation Issue

That's just because the sector header has been altered to tell you the sector is 1024 bytes while the actual sector itself is still just 512 bytes. HxC tries to interpret it according to the header information and makes it look like the next sector is inside it, which also causes the checksum to com...
by ZrX
Mon Feb 15, 2021 2:47 pm
Forum: Dumping
Topic: Dumping and Emulation Issue
Replies: 15
Views: 370

Re: Dumping and Emulation Issue

No overlapping sectors on this one. Just normal sectors but the sector headers on the last track have been altered for the purpose of copyprotection.
by ZrX
Mon Feb 15, 2021 11:25 am
Forum: Dumping
Topic: Dumping and Emulation Issue
Replies: 15
Views: 370

Re: Dumping and Emulation Issue

The disk has invalid sector numbers, wrong sector size and a checksum error on the last track. Basic things that should work on psi and perhaps imd images.
by ZrX
Thu Feb 11, 2021 6:51 am
Forum: Support
Topic: Combining interleaved disk sides to a single image
Replies: 2
Views: 147

Re: Combining interleaved disk sides to a single image

dtc -fOSBoot.img -v360 -z0 -g2 -i3 -e76 -l8 You just need to drop the -g2, as that tells dtc to produce images of each side separately (g0 for side 0, g1 for side 1 and g2 for both sides). Without it it'll combine data from both sides into a single image. I must say this bit of hardware is amazing ...
by ZrX
Sun Feb 07, 2021 5:50 pm
Forum: Support
Topic: Preserving Disks with Mismatched Sectors
Replies: 9
Views: 322

Re: Preserving Disks with Mismatched Sectors

Clearly a 3.5" disk but just first 40 tracks on side 0 used, the rest of the disk (and side 1) is unformatted.

As said, the mixed sector sizes makes typical img diskimage file unusable with this title. The conversion tools on PCE could possibly convert this to a image that can be played on PCE.
by ZrX
Tue Jan 19, 2021 9:16 am
Forum: Support
Topic: KryoFlux stopped working
Replies: 3
Views: 299

Re: KryoFlux stopped working

What's the response you get after running the c2 calibration test?

Sounds a bit like something wrong with the stepper motor. Do you have other drives to test with or a way to test the drive in some old computer?