Pegasus Fast Start Guide 7460572 Rev A Page 11 of 12

BIOSCONFIGURATIONFORTHEISABUSI/OADDRESSES

ThedefaultconfigurationfortheISAbusisasfollows.Togetherthesetwoconnectorscomprise

connectorPC104PI.

IOCHCHK‐ A1B1GroundGroundC0D0Ground
SD7A2B2RESETDRV SBHE‐ C1D1MEMCS16‐
SD6A3B3+5VLA23C2D2IOCS16‐
SD5A4B4IRQ9LA22C3D3IRQ10
SD4A5B55VLA21C4D4IRQ11
SD3A6B6DRQ2LA20C5D5IRQ12
SD2A7B712VLA19C6D6IRQ13
SD1A8B8ENDXFR‐ LA18C7D7IRQ14
SD0A9B9+12VLA17C8D8DACK0‐
IOCHRDYA10B10KeyMEMR‐ C9D9DRQ0
AENA11B11SMEMW‐ MEMW‐ C10D10DACK5‐
SA19A12B12SMEMR‐ SD8C11D11DRQ5
SA18A13B13IOW‐ SD9C12D12DACK6‐
SA17A14B14IOR‐ SD10C13D13DRQ6
SA16A15B15DACK3‐ SD11C14D14DACK7‐
SA15A16B16DRQ3SD12C15D15DRQ7
SA14A17B17DACK1‐ SD13C16D16+5V
SA13A18B18DRQ1SD14C17D17MASTER‐
SA12A19B19REFRESH‐ SD15C18D18Ground
SA11A20B20SYSCLKKeyC19D19Ground
SA10A21B21IRQ7
SA9A22B22IRQ6
SA8A23B23IRQ5
SA7A24B24IRQ4
SA6A25B25IRQ3
SA5A26B26DACK2‐ 
SA4A27B27TC
SA3A28B28BALE
SA2A29B29+5V
SA1A30B30OSC
SA0A31B31Ground
GroundA32B32Ground

TheISAbusI/OaddressrangescanbechangedintheBIOS.