DOS ain't dead - Virtual PC and HX

Virtual PC and HX (DOSX)

posted by Japheth , Germany (South), 18.07.2007, 19:19

There were some emails over the past months complaining that HX doesn't run on Virtual PC (2004 and 2007). Well, my point of view still is that this is a VPC problem, but nevertheless there is a modified HDPMI32 available which might run in VPC:

http://www.japheth.de/Download/hdpmivpc.zip

Some details: this modified version runs clients with IOPL=0, the standard version runs them with IOPL=3. To run clients with IOPL=0, HDPMI has to handle all protection faults caused by IO sensitive instructions (CLI, STI, IN, OUT) internally, run them in ring 0 and return to the client. This slows down execution to some degree, so better don't use the modified version outside of VPC.

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MS-DOS forever!

Post reply

Complete thread:

Virtual PC and HX - Japheth, 18.07.2007, 19:19 (DOSX)
- Vir[tu]al PC and HX - DOS386, 23.07.2007, 02:26
  - Virtual PC and HX - rr, 23.07.2007, 09:17
    - Virtual PC and HX - Japheth, 23.07.2007, 14:00
      - Virtual PC and HX - rr, 23.07.2007, 14:16
- Virtual PC and HX - Aspi, 28.09.2007, 02:31
  - Virtual PC and HX - rr, 28.09.2007, 09:42
    - Virtual PC and HX - Rugxulo, 28.09.2007, 22:42
      - Virtual PC and HX - Japheth, 29.09.2007, 09:11