15
votes
Accepted
I made a sector image of a Windows 95 partition, but it won’t boot. Why?
When you used dd, did you capture it from the first physical sector? Or did you merely grab the volume of interest?
If you did it on \\.\Volume{$$$$$$$$-$$$$-....}, then you only got C:, not the ...
- 1,365
14
votes
Accepted
What are D64, T64, D71 and D81 files?
These are disk- and tape images files for the Commodore 64 and computers using the same floppy drives and disk formats, like the VIC-20, or the Commodore 128.
D64 are single-sided 5.25" disk images (...
- 10.3k
14
votes
Install a DOS application consisting of 5 .IMG files (when expanded) on Windows 10 running DOSBox-X
The following DOSBox command:
imgmount a 1.img 2.img 3.img 4.img 5.img -t floppy
loads five floppy images for use as the emulated A: drive. If the disk images are not in the current working directory ...
- 12.7k
13
votes
Accepted
Why is QEMU cutting off the last cylinder of the disk image?
QEMU is not at fault here. The discrepancy comes from the BIOS.
When I create a disk image as described in the question, then attach it to a QEMU virtual machine and use the info qtree command in the ...
- 23.4k
13
votes
Install a DOS application consisting of 5 .IMG files (when expanded) on Windows 10 running DOSBox-X
At least in DOSBox-X version 2022.09.0(1), you can mount a sequence of disk images to drive A: simply by mounting from the drive menu:
You should probably first select the Option: Mount images read-...
- 4,987
12
votes
Accepted
How to transfer AT&T 6300 ".360" disk images onto physical floppies
These are headerless sector dumps of the 360KiB disks, and can be written directly to the appropriate floppies. Since you’re using Windows 98, I suspect the best tool to do is ImageDisk.
You’ll need ...
- 127k
11
votes
Accepted
Writing DSK images onto a 3″ floppy for Amstrad/Sinclair computers
I used the dsk2cdt2disc tool to convert a .dsk image to a .cdt tape file. I can then play this tape file via an app (or convert it to audio data) and use a standard Amstrad tape cable to play the ...
10
votes
Writing DSK images onto a 3″ floppy for Amstrad/Sinclair computers
I've written various programs that may help, if the DSK files don't make use of copy protection.
If you can get files onto the +3 via the ZXMMC, you can use DU54 at http://www.seasip.info/Cpm/...
- 8,328
10
votes
Accepted
How can I tell if an Apple II disk image is bootable?
The bootprocess itself don't know any 'not bootable' exit. If a disk can be read, the first sector is loaded at 800 and then jumped to 801 (800 holds a counter for the number of sectors to read by the ...
- 232k
10
votes
How can I use ImageDisk (.IMD) images with VirtualBox, WinImage, etc.?
libdsk can convert IMD to a raw disc image.
dskconv -otype raw file.imd file.img
or in versions prior to 1.5.5:
dsktrans -otype raw file.imd file.img
- 8,328
10
votes
What are the most common Apple II disk image formats and what hardware disk drive emulators can use them?
Another partial answer.
.d13 is a format for storing the 13-sector floppy disks that were used on the Apple II before mid-1980, by Apple OS's before before DOS 3.3; i.e. Apple DOS 3.1, 3.2 and 3.2.1, ...
- 101
10
votes
Accepted
How can I programmatically determine whether an Apple II .dsk disk image is a DOS .do image or a ProDOS .po image?
You can't tell if a .do/.po disk image file is in DOS order or ProDOS order unless you recognize something on the disk. If it has a DOS 3.3 or ProDOS filesystem, it's pretty easy. Otherwise... not ...
- 9,348
10
votes
Accepted
Understanding the DMK disk image file format used by TRS-80 emulators
I support DMK in my MSX emulator, and bear in mind that it's a bit of a confused file format. It has a bunch of design deficiencies, and was clearly tightly coupled to the program that originally ...
- 38k
9
votes
Accepted
How can I use ImageDisk (.IMD) images with VirtualBox, WinImage, etc.?
Keir Fraser’s Disk Utilities include an analysis and conversion program, disk-analyse, which can convert to and from ImageDisk files (among others). To convert an ImageDisk file to a plain MFM disk ...
- 127k
9
votes
What are the most common Apple II disk image formats and what hardware disk drive emulators can use them?
I can offer a partial answer only:
.dsk, .do and .po are all the same file format: sector contents only, implicitly ordered. The difference is that DOS 3.3 and Pro-DOS use different orderings, so it'...
- 38k
8
votes
Methodology for imaging Atari disks
Well, after spending some time googling last night I have discovered something called SIO2PC. This is probably old news to the Atari fans out there, but in case anyone is having the same initial ...
- 10.2k
8
votes
Accepted
How to read Microware OS-9 RBF Filesystem under Windows / Linux?
ToolShed seems to be the current maintained OS9/descendants disk manager tool. It's not a file browser but works on the command line.
Are you sure your disk image is a valid RBF image, though? ...
- 21.9k
8
votes
What are D64, T64, D71 and D81 files?
Since I've been writing code to interact with various systems' disk image formats over the past few weeks I'd like to add a little more information that's not in the current answers.
Disk images and ...
- 7,640
8
votes
Accepted
What floppy disk format and layout and what disk image format are used for the Coleco Adam?
A partly speculative answer, working backwards from the source code of Marat Fayzulin's ColEm, it appears to be a fixed-size sector dump. On line 52 of EMULib/FDIDisk.c you can see confirmation of the ...
- 38k
7
votes
Accepted
Create an Amiga hard disk image
I successfully dumped data from disk to image. I used two programs from Aminet:
http://aminet.net/package/disk/misc/xfs
http://aminet.net/package/util/cli/bcopy
First need to mount DEV device from xfs ...
- 251
7
votes
Accepted
Can someone help me get xROAR to read files? (M6809/TRS-80 ColorComputer)
You can manage CoCo disk images quite easily with MAME's imgtool. I've assumed you want to use RS-DOS on a CoCo 2, launching xroar via:
xroar -default-machine coco2bus
To make a blank, single-sided ...
- 21.9k
7
votes
Accepted
How does the Spectrum +3 know whether a disk is bootable or not?
I think some of the answers here are combining determining the disk format with detecting if it's bootable. I've answered how the format is detected on its own question, so here I'll concentrate on ...
- 8,328
7
votes
Accepted
Compucolor 2 emulator CCEmu's `.ccvf` disk format
I played around a bit with it, and it seems the solution is to basically emulate the full UART behaviour, in particular in regards to detecting start bits. Instead of framing statically by 10 bits, we ...
- 2,770
6
votes
Copying disk image from HP 9122D drive
(Some background: the 9122D uses Sony OA-D32W floppy drives. Here's a service manual and a discussion about repairing these drives.)
If you want a perfect 1:1 image of the floppy disk at the magnetic ...
- 17.6k
6
votes
How can I view an Error Info Block in a D64 image?
The purpose of those error blocks is to emulate copy protection. It's not enough to do error recovery. You'd need to make copies in the G64 format which is made from the raw GCR stream.
The error ...
- 938
6
votes
How can I view an Error Info Block in a D64 image?
AFAIR the error info is just an attached block with one byte per sector of the imaged disk, tlling if that sector did produce a read error in the first place.
Within the plethora of tools to handle ...
- 232k
6
votes
Creating a PDP-11 bootable disk
There is no specific 'format' required.
On a real PDP-11, what happens at bootup depends on what kind of boot PROM you have installed. In general, for disk-type devices the convention is to load the ...
- 11.4k
6
votes
Accepted
Is there any tool to convert .DSK to mp3 file?
c2t converts from 140K disk images to audio files, though only AIFF or WAV files. It might take some experimentation to get MP3 encoding settings that work using the Apple II's LOAD command, though. ...
- 21.9k
6
votes
Accepted
How do I know where the file directory is stored on a Spectrum +3 disk layout?
It's probably best to take a look at the +3DOS DD_LOGIN function, since that's the ultimate source for how a +3 identifies a disc. What this does is:
Call DD_SEL_FORMAT with A=0 to select the ...
- 8,328
Only top scored, non community-wiki answers of a minimum length are eligible