Search found 302 matches

by ZrX
Mon Jul 15, 2019 9:30 pm
Forum: Support
Topic: Intellec MDS-80
Replies: 22
Views: 502

Re: Intellec MDS-80

Agreed. Something on that one portion of the disk is not getting improved. Don't know if there's actual surface damage as the signal is there, its just getting more noisy with the second dump. First dump on the left and second on the right. And as with these obsolete medias, side 0/A is the back/und...
by ZrX
Sat Jul 13, 2019 4:54 pm
Forum: Support
Topic: Intellec MDS-80
Replies: 22
Views: 502

Re: Intellec MDS-80

I was wrong. Not sure why the first dump had the first three tracks of data missing but the second dump was good minus few bad sectors on unused areas. Cane was also good with two bad sectors on unused areas. Volpe on the other hand has lots of damage throughout the disk. The files might be accessib...
by ZrX
Fri Jul 12, 2019 3:46 pm
Forum: Support
Topic: Intellec MDS-80
Replies: 22
Views: 502

Re: Intellec MDS-80

I doubt Adolfo disk will improve if the first tracks are really erased. And as those tracks also contain the file allocation table which makes parsing files together difficult.

Will check the dumps later.
by ZrX
Tue Jul 09, 2019 10:49 pm
Forum: Support
Topic: Kryoflux Stuck mid-run
Replies: 1
Views: 72

Re: Kryoflux Stuck mid-run

Under Windows when a job is run from command line and interrupted it sometimes happens that the board goes unresponsive for some reason when it should just stop. Executing the same command again then gets stuck for a moment, but then resets the board and with the next attempt it's working again. Pre...
by ZrX
Sun Jul 07, 2019 5:21 pm
Forum: Support
Topic: Intellec MDS-80
Replies: 22
Views: 502

Re: Intellec MDS-80

Third one had first three tracks either formatted or wiped for whatever reason. Few tracks had errors but were unused.

Actual used portion of the data was ok.
adolfo.zip
(13.35 KiB) Downloaded 7 times
by ZrX
Fri Jul 05, 2019 10:58 pm
Forum: Support
Topic: Intellec MDS-80
Replies: 22
Views: 502

Re: Intellec MDS-80

This one is in better condition than the other one. The converted image is probably fully salvaged. grammi.zip For processing the other disks, not sure how far from Finland you reside, and how many floppies there are. Sure it's doable if you want to avoid processing the disks yourself. I found the f...
by ZrX
Tue Jul 02, 2019 6:29 pm
Forum: Support
Topic: Intellec MDS-80
Replies: 22
Views: 502

Re: Intellec MDS-80

The data actually does look bad. There's lots of bleeding between the scatter plot bands on tracks containing data. Tho the bands of unused sectors look fairly cleanly separated. I'd expect errors atleast on tracks 0, 1 and 5. Not sure if it's the age or could cleaning of the disk and/or drive heads...
by ZrX
Mon Jun 03, 2019 7:18 am
Forum: Support
Topic: Reading MFM disks
Replies: 1
Views: 233

Re: Reading MFM disks

Add -z1 before -i4 to set sector size to 256.
by ZrX
Sat May 18, 2019 10:17 pm
Forum: Support
Topic: Request: Hard-sectored disks (5.25) for test material to KF team
Replies: 20
Views: 1010

Re: Request: Hard-sectored disks (5.25) for test material to KF team

On the side of firmware ROM, about half of the space is used for keyboard routines. From powerup it prints the "QUESTAR/M" message and then waits for the keyboard for 4 different commands, T, C, B, G. It expects 0 to follow B, but can possibly handle other parameters with it aswell (I find Z80 assem...
by ZrX
Sat May 18, 2019 5:49 pm
Forum: Support
Topic: Request: Hard-sectored disks (5.25) for test material to KF team
Replies: 20
Views: 1010

Re: Request: Hard-sectored disks (5.25) for test material to KF team

So, I downloaded the files and looked at them. I fully agree with ZrX's investigation! But the decoded image files have a different layout. As mentioned earlier, the sectors contain 512 bytes and there are only 8 sectors on each track. Where did you get the images from? They don't look as the are c...