Ciprico Rimfire 3880 User Manual download pdf (Page 50)

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.

1 2 ... 45 46 47 48 49 50 51 52 53 54 55 ... 229 230

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Ciprico Rimfire 3880 User Manual Page 50