I've accidentaly flashed MVP3 BIOS into VP3. As the boards are similiar, PC booted up but ended POST on memory test without any possibility to enter BIOS setup. I've got two possibilities - hot flash or bootblock recovery. But the only way to start bootblock recovery is the CMOS checksum error, which is possible to happen when shorting chip pins (as the BIOS is OK to bootblock). I've got AT29C010 - which pins should I short to recieve chcecksum error and start bootblock?
It seems that hotflash is an obsolete solution and absolutly not needed. I've tried Rainbow's method of shorting two topmost address pins and it worked. i think, that 90% of hotflashed chips could be recovered by this method an it should be promoted as a first resort method.
The shorting method is NOT a replacement for hot-flash. It can be only used if the bootblock is not damaged and works on that board. There is also a risk of damaging the board. However, this method can be used even if the flash ROM is soldered to the board.