Re: mmx instruction support on bohcs

thanks !

I have got what you mean! I should enable some characters I want ,not
modify its source .
bochs is abstract  than os  ,  So i got confused ，consider it as fixed
hardware.not programmable.

 .

. .





2013/4/26 Stanislav <[email protected]>

> I bought a car and filled it with water instead of gasoline so it doesn’t
> work.****
>
> What should change in the car firmware to make it working ?****
>
> ** **
>
> I strongly suggesting you to read Intel Software Developers manual first.*
> ***
>
> ** **
>
> Stanislav****
>
> ** **
>
> *From:* Hatte John [mailto:[email protected]]
> *Sent:* Friday, April 26, 2013 6:14 AM
> *To:* Thore Sittly
> *Cc:* Stanislav; [email protected]
> *Subject:* Re: Re: [Bochs-developers] mmx instruction support on bohcs****
>
> ** **
>
>   Need I   add these to bochs source ? if I want to enable sse .****
>
> ** **
>
> ** **
>
> 2013/4/26 Thore Sittly <[email protected]>****
>
> Maybe this should work:****
>
> ;now enable SSE and the like****
>
> mov eax, cr0****
>
> and ax, 0xFFFB         ;clear coprocessor emulation CR0.EM****
>
> or ax, 0x2                     ;set coprocessor monitoring  CR0.MP****
>
> mov cr0, eax****
>
> mov eax, cr4****
>
> or ax, 3 << 9          ;set CR4.OSFXSR and CR4.OSXMMEXCPT at the same time****
>
> mov cr4, eax****
>
> ret****
>
>  ****
>
>  ****
>
> ** **
>

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