Silicon Graphics SGI 1100 Maintenance And Upgrade Manual page 145

007-4047-001
Table A-17 (continued)
Hex Range Device Function
030-037 Interrupt controller-1, 8259
040-047 System timer (8254-1)
050-057 System timer (8254-1)
060-06F Keyboard controller, 8742
070-07F Real-time clock, NMI mask
080-09F DMA page register 74LS612
Speed status register
0A0-0BF Interrupt controller-2, 8259
0C0-0DF DMA controller-2, 8237
0F0 CLEAR math co-processor BUSY
0F1 RESET math co-processor
0F8-0FF Math co-processor
4A0 System I/O port
Bit 3: On-board VGA enable/disable
Bit 0: On-board LAN 1 enable/disable
Bit 1: On-board LAN 2 enable/disable
Bit 2: On-board SCSI enable/disable
I/O Address Map
1: Disable
0: Enable
1: Disable
0: Enable
1: Enable
0: Disable
Hardware Specifications and Configurations
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