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Geographical Address Switch, S2 Hardware Preparation and Installation
MVME7100 Single Board Computer Installation and Use (6806800E08A)
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2.4.1.7 Master WP
The Master Write Protect (WP) switch is OFF for normal operation. When this switch is ON,
writes to the NOR Flash, NAND Flash, MRAM and I
2
C EEPROMs are disabled. When the
switch is OFF, writes to the non-volatile devices may be allowed depending on other switches
and control bits.
2.4.2 Geographical Address Switch, S2
The Tsi148 VMEbus Status Register provides the VMEbus geographical address of the
MVME7100. Applications not using the 5-row backplane can use the geographical address
switch to assign a geographical address per the following diagram. More information regarding
GA address switch assignments can be found in the MVME7100 Single Board Computer
Programmer’s Reference.
2.4.3 VME System Controller Select, S2
Positions 1 and 2 of S2 are used to select VME System Controller selection. The default is for
automatic determination of SYSCON.
Figure 2-5 Geographical Address Switch Position
Table 2-6 VME System Controller and GA Switch Settings
Position Function Default
S2-1 VME SCON Auto
1
Auto-SCON
S2-2 VME SCON SEL
2
Non-SCON
S2-3 GAP 1
S2-4 GA4 1
S2-5 GA3 1
S2-6 GA2 1
S2-7 GA1 1