Delta Data Systems PMAC PCI, Hardware Reference Manual

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PMAC-PCI Hardware Reference
12 Jumper Summary
Power-Up State Jumpers
Jumper E4 on the Non-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 automatically
detect that the board is in bootstrap mode and ask you what file you want 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”.
Flash Memory Bank Select Jumpers
The flash-memory IC in location U10 on the Flex CPU board has the capacity for eight separate banks of
firmware, only one of which can be used at any given time. The eight combinations of settings for
jumpers E10A, E10B, and E10C select which bank of the flash memory is used. In the factory production
process, firmware is loaded only into Bank 0, which is selected by having all of these jumpers OFF.
Installation
The Flex CPU board installs on the base controller board using the P1 and P3 stack connectors on the
solder side of the CPU board. The CPU board can be further secured to the base board with a standoff
and screw through the central hole. When a complete PMAC or Turbo PMAC controller is purchased,
this assembly is done at the factory. In the case of retrofits or updates to existing controllers, this
assembly is easy to do in the field.
WARNING :
The Flex CPU board and PMAC controller boards contain static-sensitive
components. Make sure proper ESD protection is employed.