mirror of
https://github.com/cfenollosa/os-tutorial.git
synced 2024-10-27 20:34:19 +00:00
cr0 "32bit bit" -> "protected mode" bit
This comment seems misleading to me, bit 0 of the `cr0` register enables protected mode, and that is its official name, is there a reason why it says "32 bit"? Sources: - [Intel manual](https://www.intel.com/content/dam/www/public/us/en/documents/manuals/64-ia-32-architectures-software-developer-vol-3a-part-1-manual.pdf) page 78 - https://wiki.osdev.org/CPU_Registers_x86#CR0
This commit is contained in:
parent
7aff64740e
commit
d58294dabe
@ -3,7 +3,7 @@ switch_to_pm:
|
||||
cli ; 1. disable interrupts
|
||||
lgdt [gdt_descriptor] ; 2. load the GDT descriptor
|
||||
mov eax, cr0
|
||||
or eax, 0x1 ; 3. set 32-bit mode bit in cr0
|
||||
or eax, 0x1 ; 3. set protected mode bit in cr0
|
||||
mov cr0, eax
|
||||
jmp CODE_SEG:init_pm ; 4. far jump by using a different segment
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user