Table A-16 Memory Address Map; Table A-17 I/O Address Map - Silicon Graphics SGI 1100 Maintenance And Upgrade Manual

A: Technical Specifications
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Table A-16 provides details about the memory address map.
Memory Address Map
Table A-16
Address Size
0000000-009FFFF 640-KB system memory
00A0000-00BFFFF 128-KB video RAM
00C0000-00C7FFF 32 KB for VGA BIOS
00C8000-00CFFFF 32-KB I/O expansion ROM
00D0000-00D3FFF 16-KB I/O expansion ROM
00D4000-00D7FFF 16-KB I/O expansion ROM
00D8000-00DBFFF 16-KB I/O expansion ROM
00DC000-00DFFFF 16-KB I/O expansion ROM
00E0000-00E7FFF 32 KB for SCSI BIOS
00E8000-00EFFFF 32 KB
00F0000-00FFFFF 64-KB BIOS
0100000-0F9FFFF System memory
0FA0000-0FFFFFF 384-KB I/O card memory
1000000-FFFFFFF System memory
Table A-17 lists the device function for each hex range.
Table A-17 I/O Address Map
Hex Range Device Function
000-01F DMA controller-1, 8237
020-027 Interrupt controller-1, 8259
Function
On-board DRAM
Reserved for graphics display buffer
Non-cacheable
Reserved for on-board VGA
Reserved for ROM on I/O adapters
Reserved for ROM on I/O adapters
Reserved for ROM on I/O adapters
Reserved for ROM on I/O adapters
Reserved for ROM on I/O adapters
Reserved for SCSI BIOS
Reserved on-board
System ROM BIOS (ROM)
System RAM BIOS (DRAM)
On-board DRAM
Reserved for memory map
I/O card
Non-cacheable
On-board DRAM
007-4047-001