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21020285 D User’s Guide
Chapter 3 Hardware Installation
Page 3 - 8 Step 2: Jumpers and Termination
Figure 8 Bus Request and Grant on Level 0
Sysfail
Jumper
The VMEbus Sysfail signal is (according to standards) to be asserted during
Power-on Self-test to indicate Self-test is occurring. Some systems instead
interpret the signal as a failure. For this reason, the RF3880 adapter jumpers
the signal on the board.
IN - Sysfail signal asserted on bus during Self-test.
OUT - Sysfail signal not asserted on bus.
Table 5 on page 3 - 7 illustrates the location of the Sysfail Jumper. As shown,
the default for this jumper is IN.
VMEbus
Address
Jumpers
This set of jumpers is used to select the address at which the RF3880 adapter
can be addressed by the system. The jumpers set the upper 7 bits of the 16-bit
address, thereby reserving 512 bytes of address space.
Also available to be set is bit 2 of the address modifier lines. With this jumper
in you can elect to have the RF3880 adapter reserved for short non-privileged
access only. If the jumper is out, the board will be in short supervisory access
mode.
Figure 9 VMEbus Address Jumper
The VMEbus Address jumpers are illustrated in Fig. 3-4. The default address
setting of EE00H, with address modifier of 2DH is shown.