diff options
| author | Carlos Maiolino <[email protected]> | 2025-08-01 21:03:16 +0200 |
|---|---|---|
| committer | Carlos Maiolino <[email protected]> | 2025-08-01 21:03:16 +0200 |
| commit | 2725b95a1f78d2feac553d37252f2e560c2f9aac (patch) | |
| tree | 3e68aaf21c25fc2a46e3ee29fb4f23b188e3b3a4 /src/kernel.asm | |
| parent | 57d8e2b236c7a185bdd941c247ef0dcc5961a24e (diff) | |
Setup interrupt handling
Remap master PIC to IOAddress 0x20 to avoid collisions with CPU
exceptions.
Setup a default interrupt handler and map all interrupts to this handler
by default.
Setup a Keyboard interrupt handler for testing purposes
Wire everything up in the Makefile
Signed-off-by: Carlos Maiolino <[email protected]>
Diffstat (limited to 'src/kernel.asm')
| -rw-r--r-- | src/kernel.asm | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/kernel.asm b/src/kernel.asm index 252fd7b..bd22761 100644 --- a/src/kernel.asm +++ b/src/kernel.asm @@ -24,6 +24,19 @@ _start: or al, 2 out 0x92, al + + ; Remap master PIC + mov al, 00010001b + out 0x20, al ; MasterPIC + + mov al, 0x20 ; Start master ISR at 0x20 + out 0x21, al + + mov al, 00000001b ; Put the PIC in x86 mode + out 0x21, al + + sti + ; Jump to C code call start_kernel jmp $ |