[MAME]

Atari/Midway Vegas hardware


	Interrupt summary:

	                    __________
	UART clear-to-send |          |  
	-------(0x2000)--->|          |
	                   |          |
	UART data ready    |          |
	-------(0x1000)--->|          |                     __________
	                   |          |   VSYNC            |          |
	Main-to-sound empty|  IOASIC  |   -------(0x20)--->|          |
	-------(0x0080)--->|          |                    |          |
	                   |          |   Ethernet         |          |   SIO Summary
	Sound-to-main full |          |   -------(0x10)--->|   SIO    |--------------+
	-------(0x0040)--->|          |                    |          |              |
	                   |          |                    |          |              |
	Sound FIFO empty   |          |   IOASIC Summary   |          |              |
	-------(0x0008)--->|          |----------(0x04)--->|          |              |
	                   |__________|                    |__________|              |
                                                                                 |
 +-------------------------------------------------------------------------------+
 |	                                                   
 |	                    __________                      __________
 |	IDE Controller     |          |                    |          |
 |	-------(0x0800)--->|          |                    |          |   
 |	                   |          |----------(IRQ5)--->|          |
 |	SIO Summary        |          |                    |          |
 +---------(0x0400)--->|          |----------(IRQ4)--->|          |
	                   |          |                    |          |
	Timer 2            |          |----------(IRQ3)--->|   CPU    |
	-------(0x0040)--->|   NILE   |                    |          |
	                   |          |----------(IRQ2)--->|          |
	Timer 3            |          |                    |          |
	-------(0x0020)--->|          |----------(IRQ1)--->|          |
	                   |          |                    |          |
	UART Transmit      |          |----------(IRQ0)--->|          |
	-------(0x0010)--->|          |                    |__________|
	                   |__________|

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