diff options
Diffstat (limited to 'devices/pic_8259.c')
| -rw-r--r-- | devices/pic_8259.c | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/devices/pic_8259.c b/devices/pic_8259.c index 75a2d0e..7b4807c 100644 --- a/devices/pic_8259.c +++ b/devices/pic_8259.c @@ -6,11 +6,11 @@ #define PIC2 0xa0 #define DATA 1 -// initialization +/* initialization */ #define ICW1_INIT 0x10 -// TODO +/* TODO */ #define ICW1_ICW4 0x01 -// 8086/88 mode +/* 8086/88 mode */ #define ICW4_8086 0x01 void @@ -19,16 +19,16 @@ pic_init() outb(ICW1_INIT | ICW1_ICW4, PIC1); outb(ICW1_INIT | ICW1_ICW4, PIC2); - outb(0x20, PIC1 + DATA); // offset 0x20 - outb(0x28, PIC2 + DATA); // offset 0x28 + outb(0x20, PIC1 + DATA); /* offset 0x20 */ + outb(0x28, PIC2 + DATA); /* offset 0x28 */ - outb(0x04, PIC1 + DATA); // tell master pic there is a slave pic - outb(0x02, PIC2 + DATA); // tell slave pic its cascade identity + outb(0x04, PIC1 + DATA); /* tell master pic there is a slave pic */ + outb(0x02, PIC2 + DATA); /* tell slave pic its cascade identity */ outb(ICW4_8086, PIC1 + DATA); outb(ICW4_8086, PIC2 + DATA); - // PIC masks + /* PIC masks */ outb(0xff, PIC1 + DATA); outb(0xff, PIC2 + DATA); } @@ -37,13 +37,13 @@ void pic_enable() { unsigned char mask1 = 0xff; - mask1 &= ~(1 << 0); // irq0 timer - mask1 &= ~(1 << 1); // irq1 keyboard - mask1 &= ~(1 << 2); // irq1 cascade + mask1 &= ~(1 << 0); /* irq0 timer */ + mask1 &= ~(1 << 1); /* irq1 keyboard */ + mask1 &= ~(1 << 2); /* irq1 cascade */ outb(mask1, PIC1 + DATA); unsigned char mask2 = 0xff; - mask2 &= ~(1 << 4); // irq12 mouse + mask2 &= ~(1 << 4); /* irq12 mouse */ outb(mask2, PIC2 + DATA); enable_interrupts(); |