How much Ram can I upgrade at the Maximum?

Hello,
I like to upgrade my notebook computer RAM to 2GB ,Now it has 1 GB (PC3200) in one slot and 256(2100) RAM in other slot . . The speed is 266/200pin sodimm .Here How much Ram can I upgrade at the Maximum? by replacing 265 RAM? system configration details are given below
Motherboard Properties
Motherboard ID <DMI>
Motherboard Name KAPOK Intel 845E
Front Side Bus Properties
Bus Type Intel GTL+
Bus Width 64-bit
Real Clock 133 MHz (QDR)
Effective Clock 533 MHz
Bandwidth 4267 MB/s
Memory Bus Properties
Bus Type DDR SDRAM
Bus Width 64-bit
DRAM:FSB Ratio 1:1
Real Clock 133 MHz (DDR)
Effective Clock 267 MHz
Bandwidth [ TRIAL VERSION ] MB/s
Chipset Bus Properties
Bus Type Intel Hub Interface
Bus Width 8-bit
Real Clock 67 MHz (QDR)
Effective Clock 267 MHz
Bandwidth 267 MB/s
by
PRADEEPKUMAR