User’s Manual
SDDACK# | Secondary DMA Acknowledge. This signal directly drives the IDE device DMACK# signal. It |
| is asserted by PIIX4 to indicate to IDE DMA slave devices that a given data transfer cycle |
| (assertion of SDIOR# or SDIOW#) is a DMA data transfer cycle. This signal is used in |
| conjunction with the PCI bus master IDE function. It is not associated with any AT compatible |
| DMA channel. |
| If the IDE signals are configured for Primary and Secondary, this signal is connected to the |
| corresponding signal on the Secondary IDE connector. |
| If the IDE signals are configured for Primary Master and Primary Slave, these signals are used |
| for the Primary Slave connector. |
PDDACT# | Primary Disk Act. Signal from Primary IDE device indicating Primary IDE device activity. The |
| signal level depends on the hard disk type, normally active low. |
SDDACT# | Secondary Disk Act. Signal from Secondary IDE device indicating Secondary IDE device |
| activity. The signal level depends on the hard disk type, normally active low. |
RESET# | IDE Reset. This signal resets all the devices that are attached to the IDE interface. |
IRQ14/15 | Interrupt line from hard disk. Connected directly to |
