Timers; Interrupt Routing; Idsel Routing - Motorola AltiVec MVME5100 Series Installation & Use Manual

Functional Description

Timers

Interrupt Routing

4

IDSEL Routing

4-8
Timers and counters on the MVME5100 are provided by the board's
hardware (Hawk ASIC). There are four 32-bit timers on the board that may
be used for system timing or to generate periodic interrupts.
Legacy interrupt assignment for the PCI/ISA Bridge is maintained to
ensure software compatibility between the MVME5100 and the
MVME2700 while in 761 mode.
This is accomplished by using the on-board IPMC761 connector to route
the PCI/ISA Bridge interrupt signal to the external interrupt 0 of the Hawk
ASIC (MPIC).
Note
The SCSI device on the IPMC761 uses the standard INTA# pin
J11-04 of PMC Slot 1.
Legacy IDSEL assignment for the PCI/ISA Bridge is also maintained to
ensure software compatibility between MVME5100 and the MVME2700
while in 761 mode
This is accomplished by using the on-board IPMC761 connector to route
IDSEL (AD11) to the PCI/ISA Bridge on the IPMC761.
Note
The SCSI device on the IPMC761 uses the standard IDSEL pin
J12-25 connected to AD16.
When a standard PMC card (not the IPMC761) is plugged into slot 1, its
IDSEL assignment shall correspond to the standard IDSEL pin J12-25 and
shall be connected to AD16.
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