diff --git a/sw/main.c b/sw/main.c
index 81e6cd6..c20b850 100644
--- a/sw/main.c
+++ b/sw/main.c
@@ -7,13 +7,14 @@
 #include "sd_card.h"
 
 int main() {
-    int i;
-    uint8_t sw;
-    char s[16];
-    s[15] = 0;
+	int i;
+	uint8_t sw;
+	uint32_t resp;
+	char s[16];
+	s[15] = 0;
 
-    clrscr();
-    cprintf("Hello, world!\n");
+	clrscr();
+	cprintf("Hello, world!\n");
 
 	for (i = 0; i < 16; i++){
 		cprintf("Mapping %1xxxx to %2xxxx\n", i, i);
@@ -51,29 +52,53 @@ int main() {
 	// The RCA is hard coded for the one that I have on hand as responses
 	// are not implemented yet.
 	sd_card_command(0, 0);
+
 	sd_card_command(0x000001aa, 8);
+	sd_card_resp(&resp);
+	cprintf("CMD8: %lx\n", resp);
+
 	sd_card_command(0, 55);
 	sd_card_command(0x40180000, 41);
+	sd_card_resp(&resp);
+	cprintf("CMD41: %lx\n", resp);
+
 	sd_card_command(0, 55);
 	sd_card_command(0x40180000, 41);
+	sd_card_resp(&resp);
+	cprintf("CMD41: %lx\n", resp);
+
 	sd_card_command(0, 2);
+	sd_card_resp(&resp);
+	cprintf("CMD2: %lx\n", resp);
+
 	sd_card_command(0, 3);
+	sd_card_resp(&resp);
+	cprintf("CMD3: %lx\n", resp);
+
 	sd_card_command(0x59b40000, 7);
+	sd_card_resp(&resp);
+	cprintf("CMD7: %lx\n", resp);
+
 	sd_card_command(0x59b41000, 13);
+	sd_card_resp(&resp);
+	cprintf("CMD13: %lx\n", resp);
+
 	sd_card_command(0, 17);
+	sd_card_resp(&resp);
+	cprintf("CMD17: %lx\n", resp);
 
-    while (1) {
+	while (1) {
 
-        sw = sw_read();
-        led_set(sw);
+		sw = sw_read();
+		led_set(sw);
 
-        cscanf("%15s", s);
-        cprintf("\n");
-        for (i = 0; i < 16; i++)
-            cprintf("s[%d]=%c ", i, s[i]);
-        cprintf("\n");
-        cprintf("Read string: %s\n", s);
-    }
+		cscanf("%15s", s);
+		cprintf("\n");
+		for (i = 0; i < 16; i++)
+			cprintf("s[%d]=%c ", i, s[i]);
+		cprintf("\n");
+		cprintf("Read string: %s\n", s);
+	}
 
-    return 0;
+	return 0;
 }
diff --git a/sw/sd_card.h b/sw/sd_card.h
index 1cd59af..df44704 100644
--- a/sw/sd_card.h
+++ b/sw/sd_card.h
@@ -5,4 +5,6 @@
 
 void sd_card_command(uint32_t arg, uint8_t cmd);
 
+void sd_card_resp(uint32_t* resp);
+
 #endif
\ No newline at end of file
diff --git a/sw/sd_card.s b/sw/sd_card.s
index f6c6ed6..13a5e0c 100644
--- a/sw/sd_card.s
+++ b/sw/sd_card.s
@@ -1,8 +1,9 @@
 .include "io.inc65"
 
-.importzp sp, sreg
+.importzp sp, sreg, ptr1
 
 .export _sd_card_command
+.export _sd_card_resp
 
 .autoimport on
 
@@ -25,3 +26,25 @@ _sd_card_command:
     pla
     sta SD_CMD
     rts
+
+; void sd_card_resp(uint32_t* resp);
+_sd_card_resp:
+        phy
+        sta ptr1        ; store pointer
+        stx ptr1+1
+@1:     lda SD_CMD      ; wait for status flag
+        beq @1
+        lda SD_ARG
+        ldy #$0
+        sta (ptr1),y
+        lda SD_ARG+1
+        iny
+        sta (ptr1),y
+        lda SD_ARG+2
+        iny
+        sta (ptr1),y
+        lda SD_ARG+3
+        iny
+        sta (ptr1),y
+        ply
+        rts