Turbo PMAC PCI Lite
Hardware Setup
7
signal. With this jumper connecting pins 1 and 2, this pin outputs the warning following error status line
for the selected coordinate system.
E101-E102: Motors 1 - 4 AENA/EQU voltage configure
–
Caution:
A wrong setting of these jumpers will damage the associated output IC.
The U37 driver IC controls the AENA and EQU signals of motors 1 - 4. With the default sinking output
driver IC (ULN2803A or equivalent) in U37, these jumpers must connect pins 1 and 2 to supply the IC
correctly. If this IC is replaced with a sourcing output driver IC (UDN2981A or equivalent), these
jumpers must be changed to connect pins 2 and 3 to supply the new IC correctly.
E122: XIN7 Feature Selection
– Jump 1-2 to bring the PowerGood signal into register XIN7 at
Y:$070801 bit 7.
Reserved Configuration Jumpers
E0: Reserved for future use
E44-48 Reserved for future use (no jumper installed)
E109: Reserved for future use
CPU Jumper Configuration
E10A-E10C: Flash Memory Bank Select Jumpers
– The flash-memory IC in location U146 on the
Turbo PMAC PCI Lite 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.
E18-E20: Power-Up State Jumpers
– Jumper E18 must be OFF, jumper E19 must be ON, and jumper
E20 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.)
E21: Firmware Load Jumper
– If jumper E21 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 what file to download as the new
firmware.
Note:
Jumper E21 must be OFF during power-up/reset for the board to come up in
normal operational mode.
E119: Watchdog Timer Jumper
- Jumper E119 must be OFF for the watchdog timer to operate. This is
an important safety feature, so it is vital that this jumper be OFF in normal operation. E1 should only be
put ON to debug problems with the watchdog timer circuit.
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