> Peter Stuge wrote: .. >> See http://stuge.se/m57sli_soic_detail_labels.jpg for contact names. >> >> 1. Lift the U5-CS# pin from the board.
maybe thaere is a resistor of 0 Ohm (maybe R509 ?) between the Superio and U5? it might be easier and a LOT saver to unsorder a resistor the it is to unsolder a singer soic pin ..... >> 2. Solder 1x 100k resistor between U5-VCC and the lifted U5-CS# pin. >> 3. Solder the center contact on the switch to the U5-CS# pad on the >> mainboard. >> 4. Solder one outer contact on the switch to the U5-CS# pin, where >> one end of the resistor in step 2 is also soldered. >> 5. Solder the new flash chip to the U9 pads. Note pin 1! There should >> be a marking on the flash chip near one corner pin, that's pin 1, >> U9-CS#. >> 6. Lift U9-CS# from the board. (Or just don't solder it in step 5.) >> 7. Solder 1x 100k resistor between U9-VCC and the lifted U9-CS# pin. >> 8. Solder the second outer contact on the switch to the U9-CS# pin, >> where one end of the resistor in step 7 is also soldered. >> >> Done! Now the switch controls which of U5 and U9 is actually >> selected when the super io wants to access the flash chip. >> >> >> You could get a biased (spring-loaded) switch in order to help >> avoiding accidentally leaving the system running with the factory >> BIOS chip selected when you're doing LB work - so that the next >> flashing operation does not overwrite the wrong chip. You would need >> to hold the switch while booting the factory BIOS, but that may be >> worthwhile if you can't easily redo the soldering work if both flash >> chips contain junk. Good suggestion another one: dont solder a chip to the U9 pads but solder a 8 pin connector to that pads... then solder a mating connector to the chip(s) greetings todthgie -- linuxbios mailing list [email protected] http://www.linuxbios.org/mailman/listinfo/linuxbios
