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Questions tagged [disk-image]

For questions about the creation and use of disk images - raw data from a storage medium that has been extracted into a file.

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How to use BASIC-86 from Microsoft with SCP 8086 simulator

After the exciting news that a very early version of 86-DOS (0.11) from Seattle Computer Products was found I played a bit with the simh / Altair Z80 simulator to run the 86-DOS image and was ...
leon22's user avatar
  • 354
5 votes
2 answers
638 views

Apple ][ nibble disk format specification

Is there an official specification for .nib format disks for the Apple? I'm currently debugging through a CP/M boot disk for a Cirtech //e Z80 which works fine on real hardware but fails in an ...
PeterI's user avatar
  • 5,297
10 votes
2 answers
2k views

Install a DOS application consisting of 5 .IMG files (when expanded) on Windows 10 running DOSBox-X [closed]

I downloaded a copy of DataEase 4.5 database. Once I expanded the download, it had five .IMG files representing the original five 3.5" floppy disks. I wish to install the software so it can run ...
William Sisco's user avatar
15 votes
2 answers
488 views

Looking to recover data from OC-800 WORM disks

I have a set of OC-800 WORM disks (768MB) which contain vintage TV graphics from the '90s, written by an Ampex Electronic Still-Store (ESS). I'd like to retrieve the data from them if I can. These ...
Wildcat Matt's user avatar
12 votes
1 answer
820 views

Why is QEMU cutting off the last cylinder of the disk image?

I made a new disk image with the command dd if=/dev/zero of=hd.img bs=512 count=$(expr 16 \* 63 \* \( 15 \* 16 + 8 \)) which corresponds to creating a disk that would fill exactly with QEMU's default ...
Joshua's user avatar
  • 1,858
1 vote
2 answers
284 views

Where can I obtain Olivetti P6060 disk images?

For a long time now, I've been looking for disk images from an Olivetti P6060, but so far I've found none. The Olivetti P6060 was the second computer I wrote programs on, so making an emulator for it ...
dirkt's user avatar
  • 28.4k
2 votes
1 answer
2k views

How to write Apple IIgs .po disk images to Floppy Disks with an older Mac

I recently acquired an Apple IIgs with two 3.5" floppy drives and no hard disk. I'm very seasoned with older Macs, but I have no experience within the Apple II world. I search for a way to create ...
PoC's user avatar
  • 1,282
3 votes
3 answers
871 views

How to use IBM SaveDskF floppy format on modern machine

Is there a way to write IBM SaveDskF disk images to a floppy on a modern machine? The floppy drive is connected via USB. Some comment somewhere said to use WinImage, but I tried that and it said the ...
Tomas By's user avatar
  • 2,102
9 votes
1 answer
177 views

Compucolor 2 emulator CCEmu's `.ccvf` disk format

This Compucolor 2 emulator uses disk images with the file extension .ccvf. Here is an example file. I would like to understand how to interpret that format. I understand from the documentation that ...
Cactus's user avatar
  • 2,760
8 votes
3 answers
596 views

How to transfer AT&T 6300 ".360" disk images onto physical floppies

I got these MS-DOS 3.3 disk images for the AT&T 6300 from archive.org: ATDOS331.360 ATDOS332.360 ATDOS333.360 ATDOS334.360 Supposing that I have access to a physical 5.25″ floppy drive running ...
user4574's user avatar
  • 399
7 votes
1 answer
520 views

What floppy disk format and layout and what disk image format are used for the Coleco Adam?

I just found out that emulators for the Coleco Adam use a disk image file format with the DSK file extension. This is a very very overused extension on many different disk formats. Though a few DSK ...
hippietrail's user avatar
  • 6,694
3 votes
0 answers
383 views

Do the Tandy CoCo and the Dragon 32 & 64 use all the same disk image file formats?

Tandy's TRS-80 Color Computer "CoCo" and the Dragon 32 & 64 were very similar but not clones and not the same. Floppy disk versions used totally different DOSes and disk layouts. Both ...
hippietrail's user avatar
  • 6,694
4 votes
1 answer
415 views

Determining which sectors in an Apple II floppy disk/image are used when the boot sector declares more than 1 sectors

The Apple II disk bootstrap process looks at the first byte of track zero sector zero to see how many sectors long the bootstrap code will be. It then loads these sectors at location 0x0800 and jumps ...
hippietrail's user avatar
  • 6,694
2 votes
1 answer
266 views

Which Apple II emulators were the first ones each to use the .do and .po "dsk" floppy disk image file formats?

Apple II emulation must have started around 25 years ago but I can't seem to find a history of emulation of the platform. There are several disk image file formats but for now I'm interested in the ...
hippietrail's user avatar
  • 6,694
9 votes
1 answer
1k views

Understanding the DMK disk image file format used by TRS-80 emulators

DMK is a low-level disk image file format used by TRS-80 Model I & Model III, Tandy Color Computer, Dragon 32 & 64, and MSX emulators. It's capable of representing copy-protected disks and all ...
hippietrail's user avatar
  • 6,694
7 votes
3 answers
5k views

What are D64, T64, D71 and D81 files?

The docs for the Ultimate-II+ expansion cartridge for the Commodore 64 state: It is able to read D64 files, as well as D71 and D81 files (no partitions), T64 files. So what are D64, T64, D71 and D81 ...
chicks's user avatar
  • 397
4 votes
1 answer
455 views

Converting Apple II ProDOS blocks to DOS tracks and sectors

The 8-bit Apple II had two disk operating systems with different disk access semantics. DOS used tracks and sectors. A sector is 256 bytes. ProDOS used blocks. A block is 512 bytes. But mapping ...
hippietrail's user avatar
  • 6,694
7 votes
2 answers
1k views

How can I programmatically determine whether an Apple II .dsk disk image is a DOS .do image or a ProDOS .po image?

I'm interested in working with the most common Apple II disk image file format, .dsk. (I only programmed these machines briefly in Basic around 1979-81 and have not been in the emulator scene, so I'm ...
hippietrail's user avatar
  • 6,694
2 votes
1 answer
247 views

Are the last 4 bytes in .SCL disk image files for Spectrum clones meaningful or spurious?

I recently added support for .scl images files to my Ghidra module which already supported .trd images. They are both representations of TR-DOS floppy disks as used mainly on Spectrum clones from ...
hippietrail's user avatar
  • 6,694
2 votes
1 answer
247 views

Are there open source Java libraries for reading DSK and EDSK disk image files as used by Amstrad and Spectrum +3 emulators?

I've been working on some modules for the Ghidra reverse engineering tool. Ghidra is written in Java, which I'd always avoided when I was more actively programming so this is an opportunity to learn ...
hippietrail's user avatar
  • 6,694
2 votes
0 answers
203 views

Transfer a TeleDisk image of a 5.25 disk to a 3.5 disk

I am trying to power on an old Siemens PG675. It need a 5.25 disk but unfortunately it is missing. I found a TeleDisk image (.TD0) of this disk, and I would like to transfer it to a 3.5 floppy disk (I ...
Ucotecnico's user avatar
5 votes
3 answers
513 views

How do I know where the file directory is stored on a Spectrum +3 disk layout?

I'm trying to parse Spectrum +3 disk images. I only ever had a tape-based Speccy back in the day. The +3 had a built-in floppy drive but was late to the party and not that successful. It had the same ...
hippietrail's user avatar
  • 6,694
5 votes
4 answers
2k views

How does the Spectrum +3 know whether a disk is bootable or not?

I've been looking through documentation on The Sinclair/Amstrad Spectrum +3 which was the only Spectrum that came with a built-in floppy disk drive. The disk format was based on The Amstrad CPC and ...
hippietrail's user avatar
  • 6,694
10 votes
2 answers
3k views

What are the most common Apple II disk image formats and what hardware disk drive emulators can use them?

Archive.org has plenty of Apple II disk images, such as this DOS 3.3 image which is a .dsk file. I also see .nib and .d13 files, e.g. in this ASIMOV LISP collection. There seem to be further formats ...
cjs's user avatar
  • 26.8k
7 votes
1 answer
2k views

How to read Microware OS-9 RBF Filesystem under Windows / Linux?

I have a virtual disk image file os9000-xibase.img and Windows can't read it nor mount it. With ImDisk Virtual Disk, I'm able to mount it, but not read it, because it is a Random Block File System ...
Ciel Ruby's user avatar
  • 555
4 votes
3 answers
1k views

Is there any tool to convert .DSK to mp3 file?

I was looking into the Apple II disk server (See below for background information) and curious if there is a tool that can actually convert .DSK image to .MP3 file, as the underlying c2t only supports ...
Byungjoon Lee's user avatar
8 votes
2 answers
1k views

Create an Amiga hard disk image

I'm looking for Linux dd command equivalent for Amiga to make image of hard disk. TSGUI not work if disk have broken RDB. Do you know program which can make hard disk image on Amiga?
QkiZ's user avatar
  • 251
5 votes
2 answers
804 views

Tools for creating disk images on Mac Plus

I got BMOW's floppy emulator and have been pulling a bunch of files from 30 year old floppies (which have a miraculously low rate of failure) onto my SD card. One of the things I wanted to copy was a ...
miken32's user avatar
  • 151
8 votes
3 answers
6k views

How can I use ImageDisk (.IMD) images with VirtualBox, WinImage, etc.?

I've got ImageDisk installed on my old 486, and I've been ripping some disks for archival purposes (some 3.5", some 5.25"). It spits out .IMD files, which contain some amount of header and metadata, ...
db2's user avatar
  • 1,487
7 votes
3 answers
447 views

How can I view an Error Info Block in a D64 image?

I've been imaging old C64 floppies using a 1541 disk drive connected to my old Pentium III via a homebrew parallel cable and the Star Commander. Given that my disks are 30+ years old, I am amazed ...
Geo...'s user avatar
  • 10.2k
8 votes
1 answer
968 views

Creating a PDP-11 bootable disk

I want to create my own boot disk (an image file to use with simh) from my own PDP-11 code but I don't know how the code needs to be written to the disk/file so that it boots. I can load my code using ...
retropdp's user avatar
9 votes
1 answer
759 views

How can I tell if an Apple II disk image is bootable?

I have around 500 floppy disk images from an Apple II and IIgs BBS/usergroup that closed down recently. Some of the disks are bootable, but many aren't. Is there an easy way to tell if a disk boots ...
scruss's user avatar
  • 21.7k
4 votes
2 answers
542 views

Getting a disk image off of a HP 9133 drive

I have a HP 9133 combo disk drive connected to an HP 9000 model 310 computer running Basic 4.0. This setup is used to control a few machines, and does not have a floppy inserted. The hard drive is ...
AMiller's user avatar
  • 315
9 votes
3 answers
694 views

Copying disk image from HP 9122D drive

I have a HP 9122D (EDIT: its actually a 9133) combo disk drive connected to an HP 9000 model 310 computer running Basic 4.0. This setup is used to control a few machines. The hard drive is getting ...
AMiller's user avatar
  • 315
7 votes
1 answer
827 views

Can someone help me get xROAR to read files? (M6809/TRS-80 ColorComputer)

I implemented a Forth interpreter or the TRS-80 Color Computer (M6809) way back in the 1980s, and I've been trying to figure out how to get it loaded into an emulator to test some parts of the ...
Joel Rees's user avatar
  • 341
13 votes
4 answers
4k views

Writting DSK images onto a 3″ floppy for Amstrad/Sinclair computers

For a project I'm working on, I need to write some disks to test on my Amstrad CPC 6128. I've got some 3″ blank disks, and all my Amstrad computers (CPC and PCW) have 3″ disks, as well as my Spectrum +...
mcleod_ideafix's user avatar
8 votes
2 answers
1k views

Compaq Contura Aero 4/33C - moving data to CF/IDE disk - No operating system detected

I've got a Compaq Contura Aero 4/33 laptop with original DOS system installed. As the HDD is old and dying, I've decided to copy the drive to a CF card on a CF/IDE adapter. After connecting the drive, ...
user905747's user avatar
9 votes
1 answer
375 views

Methodology for imaging Atari disks

I have a pretty decent collection of retro computers, but I have always been a Commodore and Apple guy. I recently picked up an Atari 800XL and a 1050 disk drive, so I am investigating the ...
Geo...'s user avatar
  • 10.2k
4 votes
2 answers
912 views

Clonezilla SCSI HDD cloning problem

I'm trying to clone or take images of old SCSI hard disks. I use Clonezilla and at the last phase, it's written "no input". This is for 68 pin SCSI HDD. In another case, I can't see the hard disk at ...
Zozgul7's user avatar
  • 51
11 votes
1 answer
923 views

I made a sector image of a Windows 95 partition, but it won’t boot. Why?

I recently got my hands on an IBM 340 PC (100MHz Pentium, 16MB of RAM). I'm going to wipe the disk and start fresh, but I wanted to preserve the contents of the disk should I wish to restore it to its ...
Matt Lacey's user avatar
  • 2,330
13 votes
3 answers
3k views

Writing 800k Mac floppy images for 1.44M-equipped Macs using Linux

If you have Macintosh filesystem image of an 800k boot disk, but your physical Mac has a 1.44M SuperDrive, how can you produce a physical disk that can boot that Mac?
knghtbrd's user avatar
  • 1,039
13 votes
1 answer
985 views

What's the difference between DOS-ordered and ProDOS-ordered disk images?

Apple II emulators accept disk images in "DOS order" or "ProDOS order". What's the difference? Why have two different formats?
fadden's user avatar
  • 9,070
23 votes
2 answers
7k views

How to convert Amiga DMS to ADF?

Our demoscene group managed to release only one demo before it fell apart, but these being the early days of the Internet in my country, and me getting lucky with obtaining access to it and creating ...
SF.'s user avatar
  • 7,115