bootsect.S and magic address 0x78
Hello Linus,
Can you tell me where this magic address 0x78 in arch/i386/bootsect.S refers to? I mean, is this somewhere specified?
Many thanks and cheers from germany.
Gerrit
Quoted 8 lines
Hello Linus,
Can you tell me where this magic address
0x78inarch/i386/bootsect.Srefers to? I mean, is this somewhere specified?Many thanks and cheers from germany.
Quoted 8 lines
Gerrit
Hello Linus,
Can you tell me where this magic address
0x78inarch/i386/bootsect.Srefers to? I mean, is this somewhere specified?
Hope you'll settle for an answer from a simple lkml lurker and not the top gun.
The address 0x78 points to the floppy disk drive parameter table described here: http://www.xs4all.nl/~matrix/fdd_pt.html
A list of all the low memory ROM BIOS vectors and addresses can be found here: http://www.cybertrails.com/~fys/rombios.htm
Cheers,
Sean
Hello Sean,
thank you very much - you realy helped me a lot. I wrote to the top because this question had been already posted many times. See for instances: http://www.leto.net/mail/linuxasm/2001/msg00538.html
If this is ok for you then I would like to copy+paste your answer to all these postings I crossed.
Many thanks and cheers!
Gerrit
Quoted 38 lines · Sean Estabrooks
Quoted 14 lines
Hello Linus,
Can you tell me where this magic address
0x78inarch/i386/bootsect.Srefers to? I mean, is this somewhere specified?Many thanks and cheers from germany.
Gerrit
Quoted 8 lines
Hello Linus,
Can you tell me where this magic address
0x78inarch/i386/bootsect.Srefers to? I mean, is this somewhere specified?Hope you'll settle for an answer from a simple lkml lurker and not the top gun.
The address
0x78points to the floppy disk drive parameter table described here: http://www.xs4all.nl/~matrix/fdd_pt.htmlA list of all the low memory ROM BIOS vectors and addresses can be found here: http://www.cybertrails.com/~fys/rombios.htm
Cheers,
Sean
Quoted 9 lines · Gerrit Bruchhäuser
Hello Linus,
Can you tell me where this magic address
0x78inarch/i386/bootsect.Srefers to? I mean, is this somewhere specified?Many thanks and cheers from germany.
Gerrit
I believe Tigran's Linux Kernel Internels guide for 2.4 covers this, you can download it from here:
http://www.tldp.org/guides.html
Alas, there isn't a 2.5 guide yet. Moves too fast. :)
Rob