# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1511101868 -3600
# Node ID ef577181c119552145f1f798b3cc2198b1ea0cde
# Parent  f83509c62e120a18859590a80b5b5ed54e1faf9d
Enable the Timer3 interrupt at low priority.

diff -r f83509c62e12 -r ef577181c119 pic32.h
--- a/pic32.h	Sun Nov 19 00:39:57 2017 +0100
+++ b/pic32.h	Sun Nov 19 15:31:08 2017 +0100
@@ -71,6 +71,7 @@
 #define IEC1		0xBF881070
 #define IPC1		0xBF8810A0
 #define IPC2		0xBF8810B0
+#define IPC3		0xBF8810C0
 #define IPC7		0xBF881100
 #define IPC8		0xBF881110
 #define IPC10		0xBF881130
diff -r f83509c62e12 -r ef577181c119 vga.S
--- a/vga.S	Sun Nov 19 00:39:57 2017 +0100
+++ b/vga.S	Sun Nov 19 15:31:08 2017 +0100
@@ -358,6 +358,22 @@
 	li $v1, 1
 	sw $v1, 0($v0)		/* PR3 = 1 */
 
+	/* Initialise Timer3 interrupt. */
+
+	la $v0, IFS0
+	li $v1, (1 << 14)
+	sw $v1, CLR($v0)	/* T3IF = 0 */
+
+	la $v0, IPC3
+	li $v1, 0b11111
+	sw $v1, CLR($v0)	/* T3IP, T3IS = 0 */
+	li $v1, 0b00111
+	sw $v1, SET($v0)	/* T3IP = 1; T3IS = 3 */
+
+	la $v0, IEC0
+	li $v1, (1 << 14)
+	sw $v1, SET($v0)	/* T3IE = 1 */
+
 	/* Start timer. */
 
 	la $v0, T3CON