DOS ain't dead

Dark Debugger (Announce)

posted by Japheth , Germany (South), 23.10.2018, 15:59

> I uploaded new version. I added also an option of freeing previously
> allocated of memory.

Thanks.

The "reboot" problem is indeed related to the A20-gate. As you probably know ( or not ), a V86-monitor should ensure that the A20 gate never becomes disabled. Jemm does manage this by directly trapping accesses to ports 92h and 6xh. However, now that the cause of the problem is known, it is pretty minor, because I can always ensure that your debugger is loaded at an extended address where A20 IS zero.

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MS-DOS forever!

Complete thread:

• Dark Debugger - CandyMan, 15.10.2018, 22:07 (Announce)
  • Dark Debugger - RayeR, 16.10.2018, 06:12
    • Dark Debugger - CandyMan, 16.10.2018, 09:30
      • Dark Debugger - RayeR, 18.10.2018, 03:54
    • Dark Debugger - Japheth, 16.10.2018, 10:48
      • Dark Debugger - CandyMan, 17.10.2018, 18:16
        • Dark Debugger - Japheth, 18.10.2018, 11:16
          • Dark Debugger - CandyMan, 18.10.2018, 17:02
            • Dark Debugger - Japheth, 18.10.2018, 19:17
              • Dark Debugger - CandyMan, 22.10.2018, 18:26
                • Dark Debugger - Japheth, 23.10.2018, 15:59
                  • Dark Debugger - CandyMan, 23.10.2018, 19:37