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Gromer · Guest

Hi all,

I'm interested to understand the processor architecture in depth. So i
decided on emulating the processor itself (as my project). The best one
to start would be 386.

So i wud require some documents which explains on how to emulate any
processor or devices. ( Apart from the Intel Architecture documents
available).
How to emulate a 386 processor. I want to kno how usually this is done.
I wonder how bochs has been developed so elegantly...the resource
they've used.

It wud be appreciable if someone can guide me on any documents or
reference books avaliable on Emulating processors and devices.

..
Wht are the resources I should have in hand to start up up this
project.

Thanks,
Gromer

Terje Mathisen · Guest

Gromer wrote:

Gromer · Guest

Terje Mathisen wrote:

Noway2 · Guest

See if you can find any documentation / source code for a simulator
called "SPIM", which is a simulator for a MIPS processor. I think that
this one is available freely so you may be able to use it to gain some
insight.

Rob Warnock · Guest

Noway2 <no_spam_me2@hotmail.com> wrote:
+---------------
| See if you can find any documentation / source code for a simulator
| called "SPIM", which is a simulator for a MIPS processor. I think that
| this one is available freely so you may be able to use it to gain some
| insight.
+---------------

Or SIMH:

http://simh.trailing-edge.com/
The Computer History Simulation Project
...
SIMH implements simulators for:

* Data General Nova, Eclipse
* Digital Equipment Corporation PDP-1, PDP-4, PDP-7, PDP-8,
PDP-9, PDP-10, PDP-11, PDP-15, VAX
* GRI Corporation GRI-909
* IBM 1401, 1620, 1130, System 3
* Interdata (Perkin-Elmer) 16b and 32b systems
* Hewlett-Packard 2116, 2100, 21MX
* Honeywell H316/H516
* MITS Altair 8800, with both 8080 and Z80
* Royal-Mcbee LGP-30, LGP-21
* Scientific Data Systems SDS 940

SIMH is good enough to run such major historical operating systems
as TOPS-10 and TOPS-20 (for the KL10), VAX/VMS (for the VAX-11/780),
and RSTS/E (for the PDP-11), among others. On a modern PC [e.g., a
2 GHz Athlon, say], you can run these legacy operating systems under
emulation several times *faster* than the hardware they originally
ran on! ;-} ;-}

-Rob

-----
Rob Warnock <rpw3@rpw3.org>
627 26th Avenue <URL:http://rpw3.org/>
San Mateo, CA 94403 (650)572-2607

Guest · Posted: Wed Nov 23, 2005 9:10 am Post subject: Re: Emulating a processor

Gromer wrote:

Hannibal · Guest

I'd recommend you not to start with an x86, you'll add complexity to
the project, especially in the instruction decoding. With a fixed
length instruction set, you'll just mask and shift when you decode the
instruction. Not so with the x86.

Regards,
Hannibal

On 2005-11-22 06:56:58 +0100, "Gromer" <osIndgy@gmail.com> said:

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