X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=ld45_start_nothing;a=blobdiff_plain;f=src%2Fintr.asm;h=58ef37fc344ddb9e5a2059784ad02dfd68944eac;hp=0c8acf75347362090303e7640e4231da07da1314;hb=371bbe72cccdd5c40d5118bd0417fab062f3699a;hpb=0216fd8105a2b94aab6eb1c013c97882cacaf0c1

diff --git a/src/intr.asm b/src/intr.asm
index 0c8acf7..58ef37f 100644
--- a/src/intr.asm
+++ b/src/intr.asm
@@ -40,14 +40,29 @@ set_intr:
 	; selector (kcode:1) goes to the second dword of the descriptor
 	mov dword [ebx + 4], 08h
 
+	; install dummy interrupt handlers for all IRQ vectors
+%assign i 0
+%rep 8
+	set_irq_vector i, dummy_intr_pic1
+	set_irq_vector i+8, dummy_intr_pic2
+%assign i i+1
+%endrep
+
 	pop ebx
 	pop ebp
 	ret
 
-PIC1_CMD equ 20h
-PIC1_DATA equ 21h
-PIC2_CMD equ 0a0h
-PIC2_DATA equ 0a1h
+dummy_intr_pic1:
+	push eax
+	end_of_irq 0
+	pop eax
+	iret
+
+dummy_intr_pic2:
+	push eax
+	end_of_irq 8
+	pop eax
+	iret
 
 ; PIC initialization command word 1 bits
 ICW1_ICW4_NEEDED	equ 01h
@@ -61,8 +76,6 @@ ICW4_AUTO_EOI		equ 02h
 ICW4_BUF_SLAVE		equ 08h
 ICW4_BUF_MASTER		equ 0ch
 ICW4_SPECIAL		equ 10h
-; PIC operation command word 2 bits
-OCW2_EOI		equ 20h
 
 init_pic:
 	; send ICW1 saying we'll follow with ICW4 later on