[Jan/12/2002]

Nitro Ball by Data East
Stereo Sound


27c010 files:  B3, B5, D3, D5
27c2001 files:  B6, D6
27c512 files:  D10, D12, 20R

Eprom labels:
B3: JL "00-? "  (unreadable)
B5:  JL "02-4"
B6:  JL  "04-2"
D3:  JL  "01-4"
D5:  JL  "03-4"
D6:  JL  "05-2"
D10:  JL "06-"
D12:  JL  "07-"
R20:  JL  "08-"         (sound)


MASK ROMS:
B10   "MAV-00"  --- 27c400
B12   "MAV-01"  --- 27c400
B16   "MAV-02"  --- 27c800
B19   "MAV-04"  --- 27c800
B20   "MAV-06"  --- 27c400
E16   "MAV-03"  --- 27c800
E19   "MAV-05"  --- 27c800
E20   "MAV-07"  --- 27c400
E23   "MAV-09"  --- mx27c2100
B23   "MAV-08"  --- mx27c2100 


P17     (Sound?)     "MAV-10"     27c040
P19     (Sound?)     "MAV-11"     27c040

Data East custom chips used:
#'s  113, 56, 74, 52, , 52, 71, 71, 59, 146, 
hudson HuC6280A

Crystals:  28.0000MHz
                32.220 MHz

Yamaha YM2151

several PAL's are used.
a MB7122H is used  labeled JN-00

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[MAME]

	Gun Ball PCB Layout
	---------------------

	DE-0358-3
	|---------------------------------------------------|
	|62256   62256  |---|  PAL           |---|    CN3   |
	|JC00    JC01   |59 |  PAL           |146| DSW1 DSW2|
	|JC02    JC03   |---|  PAL           |---|          |
	|JC04-3  JC05-3        PAL                          |
	|                                                   |
	|MAV-00  JC06 |----|                 |-----|        |
	|MAV-01  JC07 | 56 |                 | 113 |        |
	|             |----|     6264        |     |       J|
	|                        6264        |-----|       A|
	|             |----|     6264                      M|
	|MAV-02 MAV-03| 74 |     6264                      M|
	|             |----|     PAL                       A|
	|             |----|     JN-00          M6295#2     |
	|MAV-04 MAV-05| 52 | |---|       MAV-11       JP7   |
	|             |----| | 71|       MAV-10 M6295#1  CN2|
	|MAV-06 MAV-07       |---|       JC08               |
	|             |----|       |----|LH5168  YM3012     |
	|             | 52 | |---| |6280|         VOL1 VOL2 |
	|             |----| | 71| |----|YM2151             |
	|MAV-08 MAV-09  28MHz|---|   32.220MHz      TA8205  |
	|---------------------------------------------------|

	Notes:
				68000 clock   : 14.000MHz [28/2]
				HuC6280 clock : 8.050MHz [32.200/4]
				YM2151 clock  : 3.577777778MHz [32.200/9]
				M6295#1 clock : 1.00625MHz [32.200/32], Sample Rate = 1006250 / 132
				M6295#2 clock : 2.0125MHz  [32.200/16], Sample Rate = 2012500 / 132
				CN2           : Connector for stereo sound out
				VOL1, VOL2    : Volume pot for left/right speakers. In Mono mode, only right volume is used.
				JP7           : Jumper to set mono/stereo output
				JN-00         : Fujitsu MB7116 PROM
				VSync         : 58kHz

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[Aug/24/2004]

Gun Ball (Japan)  
Data East 1992  

CPU
1x 68000 14.0MHz (main)
1x YM2151 3.58MHz (sound)
2x MSM6295 7.627MHz (sound)  

ROMs 22x  

Note
clone of Nitro Ball (US)  
Funzionamento Funzionante  
In vendita No  

Dumped 15/10/2004  

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