Next | Prev | Up | Top | Contents | Index
VME Bus Attachments
All multiprocessor CHALLENGE systems contain a 9U VME bus in the main card cage. Systems configured for rack-mount can optionally include an auxiliary 9U VME card cage, which can be configured as 1, 2, or 4 VME busses. The possible configurations of VME cards are shown in Table 9-1
Multiprocessor CHALLENGE VME Cages and Slots
| Model | Main Cage
Slots | Aux Cage Slots
(1 bus) | Aux Cage Slots
(2 busses) | Aux Cage Slots
(4 busses) |
|---|
| Challenge L | 5 | n.a. | n.a. | n.a. |
| Onyx Deskside | 3 | n.a. | n.a. | n.a. |
| Challenge XL | 5 | 20 | 10 and 9 | 5, 4, 4, and 4 |
| Onyx Rack | 4 | 20 | 10 and 9 | 5, 4, 4, and 4 |
.
Each VME bus after the first requires an F cable connection from an F-HIO card on a POWER Channel-2 board, as well as a Remote VCAM board in the auxiliary VME cage. Up to three VME busses (two in the auxiliary cage) can be supported by the first POWER Channel-2 board in a system. A second POWER Channel-2 board must be added to support four or more VME busses. The relationship among VME busses, F-HIO cards, and POWER Channel-2 boards is detailed in Table 9-2.
POWER Channel-2 and VME bus Configurations
| Number of VME Busses | PC-2 #1
FHIO slot #1 | PC-2 #1
FHIO slot #2 | PC-2 #2
FHIO slot #1 | PPC-2 #2
FHIO slot #2 |
|---|
| 1 | unused | unused | n.a. | n.a. |
| 2 | F-HIO short | unused | n.a. | n.a. |
| 3 (1 PC-2) | F-HIO short | F-HIO short | n.a. | n.a. |
| 3 (2 PC-2) | unused | unused | F-HIO | unused |
| 4 | unused | unused | F-HIO | F-HIO |
| 5 | unused | unused | F-HIO | F-HIO |
F-HIO short cards, which are used only on the first POWER Channel-2 board, supply only one cable output. Regular F-HIO cards, used on the second POWER Channel-2 board, supply two. This explains why, although two POWER Channel-2 boards are needed with four or more VME busses, the F-HIO slots on the first POWER Channel-2 board remain unused.
Next | Prev | Up | Top | Contents | Index