Converting a piece of PIC code to Arduino

Projects Programming
7

PS: SRAM1 and SRAM2 is for bankswitching the ram, it's in option.

jremington:
This part sets pins GP2 and GP3 as input, and sets the data bits in val_GPIO to the output pins.

    TRISIO = 0xC; //in GP2 & GP3

GPIO = val_GPIO; //high-low

If GP2 & GP3 are set as input then what are the other outputs because they aren't set.

What i did :

pinMode(GP2, INPUT);
pinMode(GP3, INPUT);

digitalWrite(?????? , val_GPIO);

Thanks