User's Manual

Turbo PMAC PCI HRM
Jumper Summary 13
Power-Up State Jumpers
Jumper E4 on the Turbo CPU board must be off, Jumper E5 must be on, and Jumper E6 must be on,
in order for the CPU to copy the firmware from flash memory into active RAM on power-up/reset.
This is necessary for normal operation of the card. (Other settings are for factory use only.)
Firmware Load Jumper
If Jumper E7 on the CPU board is on during power-up/reset, the board comes up in bootstrap mode,
which permits the loading of new firmware into the flash-memory IC on the board. When the PMAC
Executive program tries to establish communications with a board in this mode, it will detect that the
board is in bootstrap mode automatically and ask what file to download as the new firmware.
Jumper E7 must be off during power-up/reset for the board to come up in normal operational mode.
PMAC-PC INTERRUPT STRUCTURE
PMAC
8259
PIC
E62
E63
E64
E65
MI1
AXEXP1
EQU5
EQU1
IR4
HREQ (Read-Ready/Write-Ready)
IR3
F1ER
(Warning
Following Error)
IR2
IR1
IR0
EROR
BREQ
IPOS
(Warning
Following Error)
(Buffer-Request)
(In-Position)
IR6
E59
E58
E60
E61
MI2
AXEXP0
EQU6
EQU2
E54
E55
E56
E57
EQU8
EQU4
EQU7
EQU3
IR7
PCI BUS
INT