Click here to Skip to main content
15,882,209 members
Home / Discussions / Hardware & Devices
   

Hardware & Devices

 
QuestionSIM900 - connection issue Pin
MateoGlowinski1-Aug-18 21:30
professionalMateoGlowinski1-Aug-18 21:30 
QuestionSOLVED Raspberry Pi interrupt C/C++ - sample code / tutorial ? Pin
Vaclav_30-Jun-18 2:41
Vaclav_30-Jun-18 2:41 
QuestionIntel mini motherboards / MIDI IN .. Single Board Computer ? Pin
ApplesAreGood24-Apr-18 6:44
ApplesAreGood24-Apr-18 6:44 
AnswerRe: Intel mini motherboards / MIDI IN .. Single Board Computer ? Pin
Richard MacCutchan24-Apr-18 7:00
mveRichard MacCutchan24-Apr-18 7:00 
QuestionNeed help with internal timing constraint in FPGAs Pin
Member 137693108-Apr-18 21:33
Member 137693108-Apr-18 21:33 
GeneralModbus RTU with function code1 Pin
Member 105152258-Apr-18 21:08
professionalMember 105152258-Apr-18 21:08 
GeneralRe: Modbus RTU with function code1 Pin
Gerry Schmitz9-Apr-18 3:54
mveGerry Schmitz9-Apr-18 3:54 
QuestionRAM image of DVD? Pin
kalberts7-Apr-18 3:35
kalberts7-Apr-18 3:35 
There are lots of tools to create ISO image files on harddisk from a physical CD/DVD.

But are there drivers available (Windows 7 or 10) for reading a raw, physical CD/DVD, sector by sector (i.e. independent of any file system structure) into RAM, providing a driver interface so that software will see it as if it were a physical CD/ROM drive?

Alternately, but not as convenient for me: A driver making an ISO file appear as a physical drive rather than as an NTFS file. I don't need that permanent ISO image file, and waiting for it to be created will be a lot slower. (Actually, in my case, the RAM image could be built lazily: The application program could start immedately, and when the driver receives a request for a sector not yet read in, it could freeze the ongoing complete reading, serve the application by accessing the physical disk, and then return to the task of creating a RAM image of the complete disk.)

My PC, like most modern PCs today, has 16 Gbytes of RAM, so even a completely packed, two-layer DVD leaves between 6 and 7 GBytes RAM for other applications. If you need more, paging may throw out unused blocks to disk. Keeping a full DVD in RAM is perfectly realistic nowadays.

(In the good old days of DOS and 16+4 bit addressing, but RAM sizes were growing beyond 1 Mbyte, we did things like this with floppies: There was software to create a RAM disk in extended memory (who are old enough to remember LIM EMS? Smile | :) ). We created an 1.44 Mbyte RAM disk, copied in a entire floppy to it, in one go, track by track. If my memory is right, reading an entire track required two rotations, but after 154 rounds, for 77 tracks, the entire floppy was available thousands of times faster than reading the physical unit.

The problem today is not the ISO image file; I can write my own software to access every block in that image. Some other tools read from CD/DVD interfaces, rather than from the NTFS file system, or they provide other functions when reading from a physical drive. So I need a driver to fool them to believe that either an ISO file, or preferably, a RAM image of a disk, really is a physical drive, providing all those operations a physical drive offer, but at RAM speeds.

Which software is available to do give me that?
AnswerRe: RAM image of DVD? Pin
Gerry Schmitz7-Apr-18 7:04
mveGerry Schmitz7-Apr-18 7:04 
GeneralRe: RAM image of DVD? Pin
kalberts8-Apr-18 21:26
kalberts8-Apr-18 21:26 
GeneralRe: RAM image of DVD? Pin
Gerry Schmitz9-Apr-18 2:05
mveGerry Schmitz9-Apr-18 2:05 
GeneralRe: RAM image of DVD? Pin
kalberts9-Apr-18 2:30
kalberts9-Apr-18 2:30 
GeneralRe: RAM image of DVD? Pin
Gerry Schmitz9-Apr-18 3:10
mveGerry Schmitz9-Apr-18 3:10 
AnswerRe: RAM image of DVD? Pin
Randor 11-Apr-18 15:21
professional Randor 11-Apr-18 15:21 
QuestionIs android or windows tablet any good for occasional coding? Pin
Kanter6665-Apr-18 22:57
professionalKanter6665-Apr-18 22:57 
AnswerRe: Is android or windows tablet any good for occasional coding? Pin
OriginalGriff5-Apr-18 23:07
mveOriginalGriff5-Apr-18 23:07 
AnswerRe: Is android or windows tablet any good for occasional coding? Pin
Gerry Schmitz6-Apr-18 7:52
mveGerry Schmitz6-Apr-18 7:52 
AnswerRe: Is android or windows tablet any good for occasional coding? Pin
Eddy Vluggen9-Apr-18 3:50
professionalEddy Vluggen9-Apr-18 3:50 
QuestionWin 10 Crash again (captured DMP file) - hw Pin
raddevus17-Mar-18 7:37
mvaraddevus17-Mar-18 7:37 
AnswerRe: Win 10 Crash again (captured DMP file) - hw Pin
Munchies_Matt17-Mar-18 7:50
Munchies_Matt17-Mar-18 7:50 
GeneralRe: Win 10 Crash again (captured DMP file) - hw Pin
raddevus17-Mar-18 8:24
mvaraddevus17-Mar-18 8:24 
AnswerRe: Win 10 Crash again (captured DMP file) - hw Pin
Gerry Schmitz17-Mar-18 11:22
mveGerry Schmitz17-Mar-18 11:22 
AnswerRe: Confused about cat5,cat5e, and cat6 Ethernet cables Pin
Richard MacCutchan25-Feb-18 22:01
mveRichard MacCutchan25-Feb-18 22:01 
GeneralRe: Confused about cat5,cat5e, and cat6 Ethernet cables Pin
Richard Deeming26-Feb-18 1:27
mveRichard Deeming26-Feb-18 1:27 
GeneralRe: Confused about cat5,cat5e, and cat6 Ethernet cables Pin
Richard MacCutchan26-Feb-18 1:33
mveRichard MacCutchan26-Feb-18 1:33 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Praise Praise    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.