3 Interface Devices and
HP Ethernet 10/100 BaseT Network Board
Remote | There is a cable from the Remote Start connector, on the network board, to |
| the External Start connector, on the system board. This is used by the |
| Remote |
| must be routed through the hole in the chassis. Not doing so, and allowing |
| the cable to be routed with the flexible disk drive and IDE cables, will raise |
| the risk of radio frequency interference (RFI) |
| The board is supplied with power, even whilst the rest of the computer is |
| turned off, via a line called VStandby on the External Start Connector. This |
| connector also carries the control lines which the network board uses to |
| turn on the main power supply, and to send or receive other control and |
| status information. |
| When shutdown into its RPO state, the 10 BaseT side of the board draws 30 |
| mA, well within the 50 mA capability of the special RPO power supply. (The |
| 100 BaseT side of the board would draw more than 50 mA if connected, and |
| hence does not support RPO). |
| Standard drivers wait until a complete frame has been received before |
Processing (LAPP) | processing it, and passing it to the application buffer. They then wait for the |
| controller buffer to be empty before starting to receive the next frame. |
| If there are many small frames, and a large amount of Windows application |
| switching, the network utilization rate can fall below 50%. The |
| controller utilization of the system bus is about 4%. The remaining 96% can |
| be used by suitable LAPP drivers to start |
| application stack buffer. By reducing the latency between frame reception, |
| the network utilization and throughput is increased. |
Drivers | The board can be configured completely by software (no switches or |
| jumpers need changing). Drivers for the network board are supplied with |
| the computer. At the time of release, these bear the version number P.01.05. |
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