Data commit

Task/Get-system-command-output/68000-Assembly/get-system-command-output-1.68000

@@ -0,0 +1,21 @@
+doRNG:
+	;run this during vblank for best results.
+	JSR SYS_READ_CALENDAR	
+	;gets the calendar.
+	;MAME uses your computer's time for this.
+	MOVE.L BIOS_HOUR,D0		;D0 = HHMMSS00
+	LSR.L #8,D0                     ;shift out the zeroes.
+	MOVE.L frame_timer,D1           ;this value is incremented by 1 every vBlank (i.e. just before this procedure is run)
+	NOT.L D1                        ;flip all the bits of D1
+	MULS D1,D0
+	MULU D1,D0
+	MOVE.L JOYPAD1,D1               ;get the most recent button presses.
+	CloneByte D1                    ;copy this byte to all 4 bytes of D1
+	EOR.L D1,D0
+	MOVE.L RNGout_32,D2	        ;look at last time's results.
+	AND.B #1,D2                     ;check if it's odd or even
+	BNE	SwapRNGifEven
+		SWAP D0                 ;if even, swap the low and high words of D0
+SwapRNGifEven:
+	MOVE.L D0,RNGout_32
+	rts

Task/Get-system-command-output/68000-Assembly/get-system-command-output-2.68000

@@ -0,0 +1,10 @@
+	macro CloneByte 1
+	;\1 must be a data register.
+	;copies the lowest byte to all 4 bytes.
+		move.b \1,-(SP)
+		LSL.L #8,\1			
+		move.b (SP)+,\1		
+		pushWord \1
+		SWAP \1
+		popWord \1
+	endm