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Pegasus Fast Start Guide 7460572 Rev A Page 11 of 12
BIOSCONFIGURATIONFORTHEISABUSI/OADDRESSES
The default configuration for the ISA bus is as follows.Together these two connectors comprise
connectorPC104PI.
IOCHCHK‐ A1 B1 Ground Ground C0 D0 Ground
SD7 A2 B2 RESETDRV SBHE‐ C1 D1 MEMCS16‐
SD6 A3 B3 +5V LA23 C2 D2 IOCS16‐
SD5 A4 B4 IRQ9 LA22 C3 D3 IRQ10
SD4 A5 B5 ‐5V LA21 C4 D4 IRQ11
SD3 A6 B6 DRQ2 LA20 C5 D5 IRQ12
SD2 A7 B7 ‐12V LA19 C6 D6 IRQ13
SD1 A8 B8 ENDXFR‐ LA18 C7 D7 IRQ14
SD0 A9 B9 +12V LA17 C8 D8 DACK0‐
IOCHRDY A10 B10 Key MEMR‐ C9 D9 DRQ0
AEN A11 B11 SMEMW‐ MEMW‐ C10 D10 DACK5‐
SA19 A12 B12 SMEMR‐ SD8 C11 D11 DRQ5
SA18 A13 B13 IOW‐ SD9 C12 D12 DACK6‐
SA17 A14 B14 IOR‐ SD10 C13 D13 DRQ6
SA16 A15 B15 DACK3‐ SD11 C14 D14 DACK7‐
SA15 A16 B16 DRQ3 SD12 C15 D15 DRQ7
SA14 A17 B17 DACK1‐ SD13 C16 D16 +5V
SA13 A18 B18 DRQ1 SD14 C17 D17 MASTER‐
SA12 A19 B19 REFRESH‐ SD15 C18 D18 Ground
SA11 A20 B20 SYSCLK Key C19 D19 Ground
SA10 A21 B21 IRQ7
SA9 A22 B22 IRQ6
SA8 A23 B23 IRQ5
SA7 A24 B24 IRQ4
SA6 A25 B25 IRQ3
SA5 A26 B26 DACK2‐
SA4 A27 B27 TC
SA3 A28 B28 BALE
SA2 A29 B29 +5V
SA1 A30 B30 OSC
SA0 A31 B31 Ground
Ground A32 B32 Ground
TheISAbusI/OaddressrangescanbechangedintheBIOS.