Figure 1-1 and Table 1-1 describe the controls, indicators, connectors, and DIP switches on the ISA Sync board.
Table 1-1. ISA Sync Board Controls and Indicators
Designator | Function |
|---|---|
Show board status—green is lit for normal operation, red for board halt/failure | |
Momentary contact switch for system reset (not accessible after installation) | |
Momentary contact switch for non-maskable interrupt (not accessible after installation) | |
These two ports provide mini-DB26 connectors to attach to an SGI provided cable. | |
Board ID switch | Defines the board number address (see Figure 1-2) |
X.21 Resistor packs (RP15 and RP17) | These resistor packs install only on ISA boards with X.21 connections. CAUTION: If these resistor packs are present in a non-X.21 board, remove them before installation. Board damage can result if you install a non-X.21 board together with the resistor pack. |
 | Caution: Resistor packs RP15 and RP17 apply only to X.21 operation. If these resistor packs are present in a non-X.21 board configuration, remove the resistor packs before installing the board into the system. Be sure to wear a wrist strap if you need to remove the resistor packs. |