o start to do the mmio debug in asm

2009-05-18 10:03:15 +02:00
parent 1075795ef4
commit ef69ab4ab3
14 changed files with 1640 additions and 18 deletions
--- a/snes/irqtest/debug.asm
+++ b/snes/irqtest/debug.asm
@@ -0,0 +1,30 @@
+
+.MACRO printf
+    REP #$38	; mem/A = 16 bit, X/Y = 16 bit
+    SEP #$20
+    lda.w str_NMI
+    sta.w debug_pointer
+    ldy #0
+    jsr do_printf
+    REP #$30	; mem/A = 16 bit, X/Y = 16 bit
+    SEP #$20
+    
+.ENDM
+
+
+.define	debug_pointer			$0000 
+
+
+.BANK 0
+.ORG 0
+.SECTION "debug" SEMIFREE
+
+
+do_printf:
+	lda     (debug_pointer),y       ; get ascii text data
+	sta     $3000
+	iny
+	cpy     #5
+	bne     do_printf
+    rts
+.ENDs