software mni

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b1528932

Joined: 21 May 2010
Posts: 287

b1528932 12 Mar 2011, 01:30

according to this:
http://bochs.sourceforge.net/techspec/PORTS.LST

port 0x462 is an nmi port. write of 0x80 should trigger nmi.
its not, why?

12 Mar 2011, 01:30

sinsi

Joined: 10 Aug 2007
Posts: 794
Location: Adelaide

sinsi 12 Mar 2011, 06:15

According to Ralf Brown's ports.lst, that is for an EISA bus.

12 Mar 2011, 06:15

b1528932

Joined: 21 May 2010
Posts: 287

b1528932 12 Mar 2011, 17:13

according to bochs, its nmi. And i use bochs for testing. wtf?

i do not understand a few things.

- how cpu reset is done? Is it possible for external device to reset my cpu?
- how can i trigger NMI?

12 Mar 2011, 17:13

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20761
Location: In your JS exploiting you and your system

revolution 24 Mar 2011, 02:30

b1528932 wrote:

- how cpu reset is done? Is it possible for external device to reset my cpu?
- how can i trigger NMI?

Reset is easy to do, the CPU will have a dedicated pin for it. Older cases would have a button on the front panel that would activate the pin. Newer cases now omit that button Sad

You can also force a software reset with things like "triple fault" (google it). For NMI, check your hardware, they are all different in how they do it.

24 Mar 2011, 02:30

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