diff options
| -rw-r--r-- | irq.asm | 91 |
1 files changed, 24 insertions, 67 deletions
@@ -4,8 +4,8 @@ global PIC_sendEOI global idt_init extern interrupt_handler -extern pio_read -extern pio_write +extern inb +extern outb struc idt_entry .base_low: resw 1 @@ -85,20 +85,6 @@ no_error_code_interrupt_handler 31 no_error_code_interrupt_handler 33 -;interrupt_handler: -; cmp byte [esp + 4], 0x21 -; je .int21 -; -; jmp .end -; -;.int21: -; mov dword [0xB8000], ': ) ' -; push m -; call kprint -; -;.end: -; ret - PIC_sendEOI: ret @@ -114,86 +100,57 @@ PIC_remap: sub ebp, 8 push PIC1_DATA - call pio_read + call inb mov [ebp - 4], al ; save PIC1 mask push PIC2_DATA - call pio_read + call inb mov [ebp - 8], al ; save PIC2 mask - push PIC1_COMMAND push ICW1_INIT+ICW1_ICW4 ; initialization sequence (cascade) - call pio_write + push PIC1_COMMAND + call outb - push PIC2_COMMAND push ICW1_INIT+ICW1_ICW4 ; initialization sequence (cascade) - call pio_write + push PIC2_COMMAND + call outb - push PIC1_DATA push word [ebp + 8] ; ICW2: Master PIC vector offset - call pio_write + push PIC1_DATA + call outb - push PIC2_DATA push word [ebp + 12] ; ICW2: Save PIC vector offset - call pio_write + push PIC2_DATA + call outb - push PIC1_DATA push 0x4 ; ICW3: tell Master PIC there is a slave PIC at IRQ2 (0000 0100) - call pio_write + push PIC1_DATA + call outb - push PIC2_DATA push 2 ; ICW3: tell Slave PIC its cacade identity (0000 0010) - call pio_write + push PIC2_DATA + call outb - push PIC1_DATA push ICW4_8086 - call pio_write + push PIC1_DATA + call outb - push PIC2_DATA push ICW4_8086 - call pio_write - - - ;; ICW3 - ;push PIC1_DATA - ;push 0x20 - ;call pio_write - - ;push PIC2_DATA - ;push 0x28 - ;call pio_write - - ;; ICW4 - ;push PIC1_DATA - ;push 0x00 - ;call pio_write - - ;push PIC2_DATA - ;push 0x01 - ;call pio_write - - ;; mask interrupts - ;push PIC1_DATA - ;push 0xff - ;call pio_write - - ;push PIC2_DATA - ;push 0xff - ;call pio_write + push PIC2_DATA + call outb - push PIC1_DATA push word [ebp - 4] - call pio_write + push PIC1_DATA + call outb - push PIC2_DATA push word [ebp - 8] - call pio_write + push PIC2_DATA + call outb add ebp, 8 leave ret - idt_init: push ebp mov ebp, esp |