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Configuration

The reflective memory cards are configured with a set of jumpers. This section describes the required configuration for use in the SMA. A full description of the jumpers and their meaning may be found in section 5 of the reflective memory instruction manual.

Jumper Installed? Comment
J1 yes factory configured; do not change
J2 yes " "
A1 yes " "
A2 yes " "
A3 yes " "
A4 yes " "
J3 no mask field
J5 yes select 3.2 MBytes/sec with error checking
J6 no unused
J8 yes install across the two rightmost pins
J10 yes activates A32 addressing
Looking at component side of board with VMEbus connectors to the right

The reflective memory cards are accessed through the A32 address space of the VMEbus, appearing at addresses from 0 to 0xa00000. Any card installed in an antenna computer crate should be given address 0. Cards installed in the central computer crate are addressed according to which antenna is on the other end of the link. These addresses are configured on pins A20-A23 (the middle four pins on J7) as shown in the table. Also, each card must have a node ID set on pins ID0-ID3 (looking at the component side of the board with the VMEbus connectors to the right, the rightmost four pins in J9).

card linked   jumper installed? node jumper installed?
location to address A23 A22 A21 A20 ID ID3 ID2 ID1 ID0
antenna central 0x000000 yes yes yes yes 0 yes yes yes yes
                       
central ant. 1 0x100000 yes yes yes no 1 yes yes yes no
central ant. 2 0x200000 yes yes no yes 2 yes yes no yes
central ant. 3 0x300000 yes yes no no 3 yes yes no no
central ant. 4 0x400000 yes no yes yes 4 yes no yes yes
central ant. 5 0x500000 yes no yes no 5 yes no yes no
central ant. 6 0x600000 yes no no yes 6 yes no no yes
central ant. 7 0x700000 yes no no no 7 yes no no no
central ant. 8 0x800000 no yes yes yes 8 no yes yes yes
central ant. 9 0x900000 no yes yes no 9 no yes yes no
central ant. 10 0xa00000 no yes no yes 10 no yes no yes
                       
Jumper numbers increase right to left, looking at component side of board with VMEbus connectors to the right

Jumpers should be installed in all remaining positions (A24-A31 in J4, AP18-AP19 and A18-A19 in J7, and ID4-ID7 in J9).


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2008-06-18