X-Git-Url: https://robinkrens.nl/gitweb/?a=blobdiff_plain;f=start.asm;h=180f9a438f970dcf3a67c7bbad8d49b1424e5266;hb=d35408aabe7ea757d406bf8a7dba669ee8736bd5;hp=294a718221eba5d71bf860ccdfc569caddfd5b72;hpb=e0e42c2a52cb8371f4102832d20ffc5a52453a03;p=cortex-from-scratch

diff --git a/start.asm b/start.asm
index 294a718..180f9a4 100644
--- a/start.asm
+++ b/start.asm
@@ -1,4 +1,13 @@
-	.equ STACK_TOP, 0x20000800
+/* (CC-BY-NC-SA) ROBIN KRENS - ROBIN @ ROBINKRENS.NL
+ * 
+ * $LOG$
+ * 2019/7/20 - ROBIN KRENS	
+ * Initial version 
+ * 
+ * $DESCRIPTION$
+ *
+ * */
+	.equ STACK_TOP, 0x20010000 /* placed at 64kB, top of SRAM */
 	.text
 	.global _start
 	.global reset, nmi, hardfault
@@ -27,14 +36,12 @@ hardfault:
 	b hardfault
 .global stub
 stub:
-	mov r1, #'z'
-	ldr r0, [r1]
-	bx lr
-	/* ldr R0,=10
+	ldr R0,=10
 	mov R1,#0
-	udiv.w R2, R0, R1 */
+	ldc2 11, cr0, [r1, #4]
+	udiv.w R2, R0, R1 
 
 	.data
-	.word 'x'
+	.word 'x' 
 	.end