DOS ain't dead

How to reset a new computer? (Users)

posted by Japheth , Germany (South), 22.04.2020, 06:31

> to start, it would be cool to learn to know if there is a keyboard driver
> loaded, and -if so- which.

When Jemm is loaded, I load keybgr.dll, which is somewhat "rudimentary" - it calls the preinstalled BIOS driver for all keys and then translates the few keys which are different on German keyboards.

> besides this, AFAIR xEMM386 has some code to deal with CtrlAltDel. is this
> still active in JEMM386?

Of course. The kbd driver ctrl-alt-del code jumps to f000:fff0 ( or was it ffff:0000? ) to do a reset, but this surely won't work in v86-mode. So Jemm replaces the physical page FF00h (ROM) with a page from its pool and modifies the code at FFFF0h to gain control.

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MS-DOS forever!

Complete thread:

• How to reset a new computer? - Laaca, 18.04.2020, 19:04
  • How to reset a new computer? - Japheth, 18.04.2020, 20:01
    • How to reset a new computer? - RayeR, 18.04.2020, 22:10
    • How to reset a new computer? - tom, 19.04.2020, 18:06
      • How to reset a new computer? - bretjohn, 21.04.2020, 22:05
        • How to reset a new computer? - tom, 21.04.2020, 23:32
          • How to reset a new computer? - Japheth, 22.04.2020, 06:31
    • How to reset a new computer? - bretjohn, 21.04.2020, 20:08
  • How to reset a new computer? - Japheth, 22.04.2020, 06:36
    • How to reset a new computer? - Laaca, 22.04.2020, 19:28