B&R Industries Provit 5000 User Manual - page 118
Provit 5000 User’s Manual
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Controllers • System Units with Socket 370
8.19.1 Boot Block Switch
The Boot Block write protect is turned on or off using the DIP switch 1. The Boot Block is a 16
KB large memory area in BIOS, which normally is not write protected. In some cases (e.g.
upgrading the boot block for recovery mode), it is necessary to rewrite the Boot Block. This is
possible after turning switch 1 on using BIOS Upgrade Utilities (see the section "BIOS
Upgrade").
Be very careful when changing the Boot Block. The system is no longer operational
with damaged boot blocks and BIOS hardware must then be exchanged.
8.19.2 User Switch
The user jumper is not required for setting system functions. It can be utilized by the user and
evaluated using Provit 5000 Utilities (see the section "Provit 5000 Utilities").
8.20 Maintenance Controller (MTC)
The MTC is a standalone processor system, which provides additional functions that are not
available with a "normal" PC. The MTC communicates with the PC via an ISA bus (using a
couple register; FIFO and Direct Access Mode additional with the IPC5000C and IPC5600C ).