Task
Execute a system command and get its output into the program. The output may be stored in any kind of collection (array, list, etc.).




Related task
  Execute a system command


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