DOS ain't dead

New UDMA driver - details please (Announce)

posted by avoskov, 13.08.2007, 13:43

UDMA interacts more predictable and stable with BIOS SATA disks support! And XMGR hasn't that BX-reg bug. It is nice that this group of DOS drivers is developing again :) I haven't tested UDVD perfomance, but CD-ROM caching sounds promising.

> Where does it come from ? Did Johnson have the "deleted" sources ? Or did
> he merge X-drivers code with "source" code "extracted" by the Russian
> crackers from Q-drivers ? Or did Jack change the mind ?
About cracking old Q-drivers: I've only removed the decryptor stub and decrypted string pointers. After it IDA can be applied to Q-driver and listing can be compiled with TASM. But the source code without data structures and names, with absolute offsets is not very useful -- it is very hard to seriously modify it.

My experiments with decryptor were never published and it is nice that they are useless and source code is freely available :)

So, I suppose that some experimental versions of Q-drivers were used. Jack Ellis definetly had it -- at least to add protection stubs to them before releasing Q-drivers.

P.S. There is no source code of SHCDX33C on Johnson Lam site. I don't know, what is the reason (probably, he and Jack Ellis really erased it).

Complete thread:

• New UDMA driver - Norbert, 10.08.2007, 12:51 (Announce)
  • New UDMA driver - Laaca, 10.08.2007, 15:16
    • New UDMA driver - Rugxulo, 11.08.2007, 23:14
  • UDMA, UDVD & XMGR have been actually available since 26 May! - lucho, 10.08.2007, 17:02
  • New UDMA driver - details please - DOS386, 10.08.2007, 20:58
    • New UDMA driver - details please - lucho, 10.08.2007, 21:19
      • NO - DOS386, 16.08.2007, 09:43
    • New UDMA driver - details please - Khusraw, 10.08.2007, 22:55
    • New UDMA driver - details please - Japheth, 11.08.2007, 07:21
    • New UDMA driver - details please - avoskov, 13.08.2007, 13:43
      • SHCDX33C sources - Rugxulo, 13.08.2007, 14:19