Silicon Graphics Zx10, User Manual

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Direct Memory Access (DMA) Channels
007-4330-002 53
Direct Memory Access (DMA) Channels
Input/Output (I/O) Map
PCI socket 4 Bus 2, Dev 1 800208xx PIRQ08 PIRQ09 PIRQ10 PIRQ11
PCI socket 5 Bus 2, Dev 2 800210xx PIRQ10 PIRQ11 PIRQ08 PIRQ09
Table 4-3 DMA Channels
DMA Channel Data Width Assignment
0 8b or 16b Open
1 8b or 16b Second choice of ECP parallel port
2 8b or 16b Floppy disk controller
3 8b or 16b First choice of ECP parallel port
Table 4-4 I/O Map
I/O Address (hex) Assignment
0000 – 000F DMA controller 1
0020 – 0021 Interrupt controller 1
0040 – 0043 Timer/counter 1
0048 – 004B Timer/counter 2
0060 Keyboard controller
0061 NMI and speaker
Table 4-2 (continued)
PCI-to-ISA Interrupt Map
Device PCI Bus/Device CF8h Value INTA INTB INTC INTD