User`s manual

Compact PCI Interface

The Compact PCI bus interface supports four standard bus interrupts A, B, C and D. Additionally

we need to support two legacy ISA interrupts: INTP, and INTS. We need to support hot swap

through a final interrupt, ENUM, which indications a board has been inserted or removed.

See Interrupt section 0 below, for further interrupt assignment information.

Table 20: CPCI Interrupt Assignments

Signal Source I/O Port Notes

USC_INT# 7709A/7729 IRQ0/IRL0#/PTH0 IRQ0 mode; do not use

this interrupt for the

present revision

INTP 7709A/7729 PTC0/PINT0 PINT0 mode

INTS 7709A/7729 PTC1/PINT1 PINT1 mode

INTA# 7709A/7729 PTC2/PINT2 PINT2 mode

INTB# 7709A/7729 PTC3/PINT3 PINT3 mode

INTC# 7709A/7729 PTC4/PINT4 PINT4 mode

INTD# 7709A/7729 PTC5/PINT5 PINT5 mode

DEG# 7709A/7729 PTC6/PINT6 PINT6 mode

ENUM 7709A/7729 IRQ3#/IRL3#/PTH3 IRQ3 mode

Table 21: Special Read Byte Lane Control Resources

Signal Source I/O Port Notes

RBEN# 7709A/7729 RAS2U/PTE1 PTE1 mode; output

RE0# 7709A/7729 CAS2H/PTE3 PTE3 mode; output

RE1# 7709A/7729 CAS2L/PTE6 PTE6 mode; output

RE2# 7709A/7729 CASHH/PTJ5 PTJ5 mode; output

RE3# 7709A/7729 CASHL/PTJ4 PTJ4 mode; output

Table 22: Bus Lockout control

Signal Source I/O Port Notes

SH_IRQOUT# 7709A/7729 IRQOUT# Setup mode so that signal will

force external bus master

(CPCI) to give up local bus