Bios Pmode
-
French_Touch
RE:Bios Pmode
>On 2002-02-17 19:50:53, Anonymous wrote:
>How can I access bios routines from pmode ?
In fact, I think you can't because bios interrupts
are only available with the real mode:
For exemple in Pmode, interrupts 13h ( disk access )
are replaced by a processor exception.
Moreover Bios Interrupts are based on the real mode not on Pmode...
Good luck
>How can I access bios routines from pmode ?
In fact, I think you can't because bios interrupts
are only available with the real mode:
For exemple in Pmode, interrupts 13h ( disk access )
are replaced by a processor exception.
Moreover Bios Interrupts are based on the real mode not on Pmode...
Good luck
-
The Legend
RE:Bios Pmode
>On 2002-02-18 02:15:49, French_Touch wrote:
>>On 2002-02-17 19:50:53, Anonymous wrote:
>>How can I access bios routines from pmode ?
>
>In fact, I think you can't because bios interrupts
>are only available with the real mode:
>For exemple in Pmode, interrupts 13h ( disk access )
>are replaced by a processor exception.
>
>Moreover Bios Interrupts are based on the real mode not on Pmode...
>
>Good luck
You will have to use the V86-Mode if I am not mistaken,
but transfer data to and from that mode can be quite messy ...
The Legend
>>On 2002-02-17 19:50:53, Anonymous wrote:
>>How can I access bios routines from pmode ?
>
>In fact, I think you can't because bios interrupts
>are only available with the real mode:
>For exemple in Pmode, interrupts 13h ( disk access )
>are replaced by a processor exception.
>
>Moreover Bios Interrupts are based on the real mode not on Pmode...
>
>Good luck
You will have to use the V86-Mode if I am not mistaken,
but transfer data to and from that mode can be quite messy ...
The Legend
-
J. Weeks
RE:Bios Pmode
>You will have to use the V86-Mode if I am not mistaken,
>but transfer data to and from that mode can be quite messy ...
Some bioses do have a 32-bit pmode implementation
that you can use. Linux, in fact, uses it if it
can find it. I'm not sure of the specifics and
what it implements, but it's a chunk of memory,
located withen the first 1MB, I believe, and
flagged at the beginning with a 'BIOS32' string
(possibly a couple other variants on that as well)
Jeff
>
>The Legend
>but transfer data to and from that mode can be quite messy ...
Some bioses do have a 32-bit pmode implementation
that you can use. Linux, in fact, uses it if it
can find it. I'm not sure of the specifics and
what it implements, but it's a chunk of memory,
located withen the first 1MB, I believe, and
flagged at the beginning with a 'BIOS32' string
(possibly a couple other variants on that as well)
Jeff
>
>The Legend
-
Guest
RE:Bios Pmode
>On 2002-02-18 12:20:24, J. Weeks wrote:
>Some bioses do have a 32-bit pmode implementation
>that you can use. Linux, in fact, uses it if it
>can find it. I'm not sure of the specifics and
>what it implements, but it's a chunk of memory,
>located withen the first 1MB, I believe, and
>flagged at the beginning with a 'BIOS32' string
>(possibly a couple other variants on that as well)
The only thing I've seen BIOS32 used for is the PCI BIOS.
>Some bioses do have a 32-bit pmode implementation
>that you can use. Linux, in fact, uses it if it
>can find it. I'm not sure of the specifics and
>what it implements, but it's a chunk of memory,
>located withen the first 1MB, I believe, and
>flagged at the beginning with a 'BIOS32' string
>(possibly a couple other variants on that as well)
The only thing I've seen BIOS32 used for is the PCI BIOS.
-
Ghiottone
RE:Bios Pmode
>On 2002-02-18 23:02:07, Anonymous wrote:
>>On 2002-02-18 12:20:24, J. Weeks wrote:
>>Some bioses do have a 32-bit pmode implementation
>>that you can use. Linux, in fact, uses it if it
>>can find it. I'm not sure of the specifics and
>>what it implements, but it's a chunk of memory,
>>located withen the first 1MB, I believe, and
>>flagged at the beginning with a 'BIOS32' string
>>(possibly a couple other variants on that as well)
>
>The only thing I've seen BIOS32 used for is the PCI BIOS.
There is a far call pointer you can call from protected mode that tells you what kind of services you can get from BIOS in protected mode. The services are only PCI BIOS interface and Plug and Play services
Look at Ralf Brown interrupt list (a file called farcall.lst) for more informations
>>On 2002-02-18 12:20:24, J. Weeks wrote:
>>Some bioses do have a 32-bit pmode implementation
>>that you can use. Linux, in fact, uses it if it
>>can find it. I'm not sure of the specifics and
>>what it implements, but it's a chunk of memory,
>>located withen the first 1MB, I believe, and
>>flagged at the beginning with a 'BIOS32' string
>>(possibly a couple other variants on that as well)
>
>The only thing I've seen BIOS32 used for is the PCI BIOS.
There is a far call pointer you can call from protected mode that tells you what kind of services you can get from BIOS in protected mode. The services are only PCI BIOS interface and Plug and Play services
Look at Ralf Brown interrupt list (a file called farcall.lst) for more informations