# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1510006005 -3600
# Node ID ec19e9f803b57a87b8e5ea0386f5270bb6f31eab
# Parent  22ebe789d8303650c2378a119e5f1f3302a51de4
Enable Timer3 interrupts in order to create timer events.

diff -r 22ebe789d830 -r ec19e9f803b5 pic32.h
--- a/pic32.h	Mon Nov 06 19:12:47 2017 +0100
+++ b/pic32.h	Mon Nov 06 23:06:45 2017 +0100
@@ -62,6 +62,10 @@
 #define IEC1		0xBF881070
 #define IPC1		0xBF8810A0
 #define IPC2		0xBF8810B0
+#define IPC3		0xBF8810C0
+#define IPC4		0xBF8810D0
+#define IPC5		0xBF8810E0
+#define IPC6		0xBF8810F0
 #define IPC7		0xBF881100
 #define IPC8		0xBF881110
 #define IPC10		0xBF881130
diff -r 22ebe789d830 -r ec19e9f803b5 vga.S
--- a/vga.S	Mon Nov 06 19:12:47 2017 +0100
+++ b/vga.S	Mon Nov 06 23:06:45 2017 +0100
@@ -312,6 +312,24 @@
 	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 */
+
+	la $v0, IPC3
+	li $v1, 0b11111
+	sw $v1, SET($v0)	/* T3IP = 7; T3IS = 3 */
+
+	la $v0, IEC0
+	li $v1, (1 << 14)
+	sw $v1, SET($v0)	/* T3IE = 1 */
+
 	/* Start timer. */
 
 	la $v0, T3CON