[Jun/4/98]

Lazer Command (Meadows Games, 1976)

                8.079MHz OSC

                               LC.B8
                               82s115
                               
                               
             8 x 2102's (1k x 8 RAM)
             
             
             
 Signetics      LC.E5 LC.E6 LC.E7
 2659           LC.F5 LC.F6 LC.F7
                    82s137 (1kx4)



[MAME]

Lazer Command

Memory map (preliminary)


  0000-0bff ROM

  1c00-1c1f RAM 	CPU scratch pad is first 32 bytes of video RAM(not displayed)

  1c20-1eff RAM 	video buffer
			xxxx	D0 - D5 character select
					D6		horz line below character (row #9)
					D7		vert line right of character (bit #0)

  1f00-1f03 		R/W hardware

			1f00 W	   audio channels
					D4 gun fire
					D5 explosion
					D6 tank engine
					D7 running man
			1f00 R	   player 1 joystick
					D0 up
					D1 down
					D2 right
					D3 left

			1f01 W	D0 - D7 marker y position
			1f01 R	   player 2 joystick
					D0 up
					D1 down
					D2 right
					D3 left

			1f02 W	D0 - D7 marker x position
			1f02 R	   player 1 + 2 buttons
					D0 button 1 player 2
					D1 button 1 player 1
					D2 button 2 player 2
					D3 button 2 player 1

			1f03 W		attract mode
					D0 toggle on attract mode
					   (attract mode switched off by coin detected)
					D4 clear coin detected toggle
			1f03 R		coinage, coin detected and start buttons
					D0 coin 1/2 (DIP switch 4)
					D1 start 'expert'
					D2 start 'novice'
					D3 coin detected

  1f04-1f07 		Read only hardware

			1f04 R	   vertical scan counter
					D0 60 Hz
					D1 120 Hz
					D2 240 Hz
					D3 480 Hz

			1f05 R	   vertical scan counter
					D0 7.860 KHz
					D1 3.960 KHz
					D2 1.980 KHz
					D3 960 Hz

			1f06 R	D0 - D7 readback of marker x position

			1f07 R	D0 - D7 readback of marker y position

  I/O ports:

  'data'         R          game time
					D0 - D1 60,90,120,180 seconds (DIP switch 1 - 2)
-
