American Megatrends Super Voyager LPX, User Manual

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Chapter 2 Installation
3 1
Step 2 Set Switch and Jumper Options,
Continued
J31 Onboard VGA Interrupt Enable
J31 is a two-pin berg that enables use of IRQ9 for the onboard
VGA controller. Place a shorting bridge on J31, shorting
pins 1-2 together, to enable the VGA interrupt as IRQ9.
This interrupt is generated by the VGA controller during
vertical retrace. Leave J31 OPEN to disable the VGA
interrupt.
J32 Onboard VGA Disable
J32 is a two-pin berg that enables the onboard VGA. Leave J32
OPEN to enable the onboard VGA. Place a shorting bridge
on the two pins of J32 to disable the onboard VGA.
J46 J47 Onboard DRAM Bank Select
The Super Voyager LPX motherboard comes with 4 MB of
system memory surface-mounted on the motherboard. The
factory setting of J46 and J47 (pins 1-2 shorted together)
enables this bank of memory. In the system memory
configuration that includes this memory, this surface-
mounted memory bank is Bank0 and U60 should not be
populated.
J46 and J47 are both three-pin bergs that enable the surface-
mounted onboard DRAM. Short pins 1-2 of both J46 and
J47 to enable the surface-mounted onboard DRAM.
Short Pins 2-3 of J46 and J47 to disable the surface-mounted
onboard DRAM mounted on the motherboard to use only
DRAM SIMMs installed in the SIMM sockets on the
motherboard.
With Bank0 as 4 MB of fixed memory, the following table lists
the memory configurations that are supported: