In reply to: Bernd Blaauw <bblaauw@home...> > Op 29-1-2012 12:21, Bertho Grandpied schreef: >> Hard Disk -- USB (4K sectors) -- DOS with "usbaspi.sys" (ASPI manager) -- >> "didd1000.sys" (ASPI to DOS converter) (...) >> The ASPI to DOS converter is the part that has to > adapted, or else redone from scratch. I mm using Novac's > excellent DIDD1000.SYS as a reference, unfortunately as > distributed that assumes 512 byte sectors for hard disks. > From scratch would be most likely, I guess Brett's USB > drivers could > work as a foundation for that, as he mentions int13 (and > fdisk) support.
We'll hear from Bret again I hope. I don't know if he has a separate SCSI emulation layer or rather a monolithic approach. > Not possessing an UHCI controller, I've got no way of > experimenting. > Finding and purchasing such a controller also seems to get > challenging. That, and the lack of EHCI (and higher) speeds is the problem of course with solution based on Bret's present drivers. He has already stated he's currently working on OHCI/UHCI. On the other hand, the USB interface problem is already resolved satisfactorily by USBASPI.SYS (several versions) - at least OHCI/UHCI/EHCI- The USBASPI.SYS I have been using (a Chinese? "Yaya DIY" hacked Panasonic version 2.27) works well and has no problems dealing with 4K sectors. Hence in this thread I proposed one should concentrate on the part which doesn't work yet with 4K sectors, the ASPI to DOS conversion : the part played by Motto Hairu or Novac"s DIDD1000.SYS, or several similar. (...) >> It is my understanding, in vague terms, that most >> stringent "anti reverse engineering" laws allow for >> independent fixes and enhancements to IP protected code, but >> IANAL. > I don't know about fixes and enhancements, but USA's DMCA > aside, usually > the cleanest way of writing another implementation of some > piece of > software is to use "cleanroom reverse-engineering": > * 1st team studies/disassembles/debugs and documents the > program into a > specification. > * 2nd team creates a piece of software out of this > specification Ideally, yes. But how do we DOS lovers recruit and feed those teams ? -- Czerno ------------------------------------------------------------------------------ Try before you buy = See our experts in action! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-dev2 _______________________________________________ Freedos-user mailing list Freedos-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-user
