recipe/rc2014/sdcard: Make sdinit program output readable text

Makes for a more straightforward test.

recipes/rc2014/sdcard/sdinit.asm

@@ -3,16 +3,52 @@
 
 	call	JUMP_SDCWAKEUP
 
+	; We expect a 0x01 R1 response
+	ld	hl, sCmd0
+	call	JUMP_PRINTSTR
 	ld	a, 0b01000000	; CMD0
 	ld	hl, 0
 	ld	de, 0
 	ld	c, 0x95
 	call	JUMP_SDCCMDR1
-	call	JUMP_PRINTHEX
+	cp	0x01
+	jr	nz, .error
+	ld	hl, sOk
+	call	JUMP_PRINTSTR
+
+	; We expect a 0x01 R1 response followed by 0x0001aa R7 response
+	ld	hl, sCmd8
+	call	JUMP_PRINTSTR
 	ld	a, 0b01001000	; CMD8
 	ld	hl, 0
 	ld	de, 0x01aa
 	ld	c, 0x87
 	call	JUMP_SDCCMDR7
-	call	JUMP_PRINTHEX
+	ld	a, h
+	cp	0
+	jr	nz, .error
+	ld	a, l
+	cp	0
+	jr	nz, .error
+	ld	a, d
+	cp	0x01
+	jr	nz, .error
+	ld	a, e
+	cp	0xaa
+	jr	nz, .error
+	ld	hl, sOk
+	call	JUMP_PRINTSTR
+	ret
+.error:
+	ld	hl, sErr
+	call	JUMP_PRINTSTR
 	ret
+
+sCmd0:
+	.db "Sending CMD0", 0xa, 0xd, 0
+sCmd8:
+	.db "Sending CMD8", 0xa, 0xd, 0
+sOk:
+	.db "Ok", 0xa, 0xd, 0
+sErr:
+	.db "Err", 0xa, 0xd, 0