TYAN TRINITY I845 User Manual page 13

2.6 Boot Block (JP2) – MUST REMAIN CLOSED
Many newer systems come with a feature where a 4 KB "boot block" program is included as part
of the BIOS. This is a tiny piece of code whose job it is to recover from a situation where the BIOS
code is incorrect or corrupted.
If your motherboard supports this feature, when the PC tries to boot and finds the BIOS code
corrupted, the boot block will try to recover the BIOS code, usually by reading it from a specially-
prepared floppy disk. You may have to change a jumper on the motherboard to enable this
capability, and you may need to make use of a "plain vanilla" ISA video card. The boot block will
load the BIOS code and then when you next reboot, the regular BIOS code should be in place and
the problem resolved.
JP2
2 1
* default is CLOSED
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