[Jul/21/98]

Meadows Lanes (1977 Meadows Games)

   +---------------------------------------+
   |  24-0045 card                         |
                                  B8
                                  
                                  
                                               +---------------+
                                                24-0058 card
                                  
    2650       -   -      X-------------------->   1a   1b
               -   -      X-------------------->   2a   2b  2c
                                                   3a   3b  3c
                                                   4a   4b
                                                   
                                               +---------------+
                                               
                                               
           J1                  J2
           
           

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[MAME]

Meadows Lanes

Memory map (preliminary)

  0000-0bff ROM

  0c00-0c1f RAM 	CPU scratch pad is first 32 bytes of video RAM(not displayed)

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

  1000-17ff ROM

  1f00-1f03 		R/W hardware

			1f00 W	   audio control bits
					D0 - D3 not used
					D4 bowl and hit
					D5 hit
					D6 - D7 not used
			1f00 R	   bowl ball
					D0 fast
					D1 slow
					   joystick
					D2 right
					D3 left

			1f01 W	D0 - D7 marker y position
			1f01 R	   hook control
					D0 left
					D1 right
					D2 - D3 not used

			1f02 W	D0 - D7 marker x position
			1f02 R	D0 - D3 not used

			1f03 W		attract mode
					D0 toggle on attract mode
					   (attract mode switched off by coin detected)
					D4 clear coin detected toggle
					D5 can be jumpered to control inverse video
					D6 - D7 not used
			1f03 R		coinage, coin detected and start buttons
					D0 coin 1/2 (DIP switch 4)
					D1 start
					D2 not used
					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 time on	   (DIP switch 1)
					D1 3,5 seconds (DIP switch 2)
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