Update std.asm

Fix UNA build.

Source/HBIOS/std.asm

@@ -528,18 +528,21 @@ BID_IMG2	.EQU	BID_ROM0 + 3	; NETWORK BOOT				-+ ROM BANKS
 BID_ROMD0	.EQU	BID_ROM0 + 4	; FIRST ROM DRIVE BANK			 |  ROM
 BID_ROMDN	.EQU	BID_ROMN	; LAST ROM DRIVE BANK			 V  DRIVE
 ;
-#IF (!MDRAM)
+#IF (BIOS == BIOS_WBW)
+;
+  #IF (!MDRAM)
 BID_RAMD0	.SET	$FF		; RAM DRIVE DISABLED
 BID_RAMDN	.SET	$FF		; RAM DRIVE DISABLED
-#ENDIF
+  #ENDIF
 ;
-#IF (!MDROM)
+  #IF (!MDROM)
 BID_ROMD0	.SET	$FF		; ROM DRIVE DISABLED
 BID_ROMDN	.SET	$FF		; ROM DRIVE DISABLED
-#ENDIF
+  #ENDIF
 ;
+#ENDIF
 ;
-#IF TRUE
+#IF FALSE
 	.ECHO "BID_AUX: " \ .ECHO BID_AUX \ .ECHO "\n"
 	.ECHO "BID_BIOS: " \ .ECHO BID_BIOS \ .ECHO "\n"
 	.ECHO "BID_USR: " \ .ECHO BID_USR \ .ECHO "\n"