Hardware Configuration and Specification

Memory Address Map

Memory Address Size

Function

00000000-0009FFFF 640 KB Base memory 000A0000-000BFFFF 128 KB Video memory 000C0000-000CBFFF 40 KB Video BIOS 000E0000-000FFFFF 128 KB System BIOS 00100000-top limited 04000000-04000FFF 04001000-04001FFF 80100000-801000FF 80500000-805FFFFF 80800000-80BFFFFF 81000000-81FFFFFF 82100000-82100FFF -4 KB 4 KB 256 B 1 MB 3 MB 16 MB 4 MB Extended (DIMM) memory PCMCIA controller (slot 1) PCMCIA controller (slot 2) Lucent Win Modem NetMagic VGA Neomagic VGA

FFFF0000-FFFFFFFF 64 KB System board extension for PnP BIOS

Interrupt Channel Assignment

Interrupt Channel Function

NMI System errors IRQ0 System timer IRQ1 Keyboard IRQ2 Cascade IRQ3 FIR or COM2 IRQ4 COM1 IRQ5 Audio or LPT2 (optional) IRQ6 Floppy IRQ7 LPT1 IRQ8 Real time clock IRQ9 Card bus / ACPI or Modem/ VGA IRQ10 USB IRQ11 Free or COM1 IRQ12 PS2 pointing device IRQ13 Numeric data processor IRQ14 1st EIDE device (hard disk) IRQ15 2nd EIDE device (CD-ROM drive)

DMA Channel Assignment

DMA Channel Function

DRQ0 Audio(optional) DRQ1 ECP or Audio(optional) DRQ2 Floppy DRQ3 ECP(optional) DRQ4 DMA controller DRQ5 Not used DRQ6 Not used DRQ7 Not used

I/O Address Map

I/O Address Function

000-00F DMA controller-1 020-021 Interrupt controller-1 040-043 Timer 1 060, 064 Keyboard controller 8742 chip select 061 System speaker out 040B DMA controller-1 061 System speaker 070-071 Real-time clock and NMI mask 080-08F DMA page register 0A0-0A1 Interrupt controller-2 0C0-0DF DMA controller-2 0F0-0FF Numeric data processor 120-13F, 180-18F Power management controller 170-177 2nd EIDE device (CD-ROM) select 1F0-1F7 1st EIDE device (hard drive) select 220-22F Audio 240-24F Audio(optional) 278-27F Parallel port 3 2E8-2EF LT Win modem or COM4(optional) 2F8-2FF COM2 or LT Win modem(optional) 378, 37A Parallel port 2 3BC-3BE paraller port 1