PORTIBM PC Portable (uses same BIOS as XT) 210C-210F - XGA(Extended Graphics Array) Video Data (word/dword) Note: this port is for the first XGA(Extended Graphics Array) in the system; 211x-217x are used for the second through eighth XGAs 210C RW byte data 210Cw RW word data 210Cd RW dword data