save UartxRx data to static ram? help needed

[kingGrey]

I am trying to read data coming through the UartxRx interrupt and store this data directly to a static ram (http://ww1.microchip.com/downloads/en/ ... 2100B.pdf)

But the issue that I am experiencing is that it seems like this SRam chip is writing too slow for the interrupt (causing the data from the interrupt to be gabbled up, before hanging). This chip uses SPI (chip select, clk) etc to simulate writing/reading.

question:
(1) my Boss said using assembly language with the mikro code being used would make this operation faster. I don't think so but does anyone have an idea about this.?
(2) If this is true how do I go about starting this.
(3)If this is not possible how could I achieve the scenario I described.