Update sd.asm

Significantly improve compatibility of SD Cards w/ Z180 -K CPU.

Source/HBIOS/sd.asm

@@ -1335,7 +1335,19 @@ SD_EXECCMD1:
 	; THE FIRST FILL BYTE IS DISCARDED!  THIS HACK IS REQUIRED BY
 	; STUPID SD CARD ADAPTERS THAT NOW OMIT THE MISO PULL-UP.  SEE
 	; COMMENTS AT TOP OF THIS FILE.
-	CALL	SD_GET			; GET A BYTE AND DISCARD IT
+;
+	;CALL	SD_GET			; GET A BYTE AND DISCARD IT
+;
+	; THE Z180 -K REVISION CSIO DOES NOT KEEP MOSI HIGH WHEN
+	; RECEIVING VIA MISO.  INSTEAD MOSI IS LEFT AT WHICHEVER LOGIC
+	; LEVEL IT WAS LAST SET TO.  THIS CAUSES SOME SD CARDS A PROBLEM
+	; BECAUSE THEY EXPECT MOSI TO BE CONSISTENTLY HIGH WHEN IDLE.
+	; BY USING A PUT INSTEAD OF A GET, WE CAN FORCE MOSI TO BE
+	; LEFT AT THE PROPER LOGIC LEVEL.  THE SD CARD DOES NOT CARE
+	; IF A PUT OR A GET IS USED TO IGNORE THE BYTE BECAUSE THE
+	; CLOCK RUNS IN EITHER CASE.
+	LD	A,$FF			; KEEP MOSI HI
+	CALL	SD_PUT			; SEND 8 CLOCKS
 #ENDIF
 ;
 	; GET RESULT
@@ -1661,6 +1673,11 @@ SD_SELECT2:
 #ENDIF
 	LD	(SD_OPRVAL),A
 	OUT	(SD_OPRREG),A
+;;
+;#IF ((SDMODE == SDMODE_CSIO) | (SDMODE == SDMODE_MK4) | (SDMODE == SDMODE_SC))
+;	CALL	DLY32			; DELAY FOR FINAL BIT
+;#ENDIF
+;
 	RET
 ;
 ; DESELECT CARD