4833 LX/T  (250-5145)          Serial Port Address      Faxback Doc. # 1198

COM A (Serial Port A):

Port Select   Port Address   Interrupts

  COM1        3F8-3FF        IRQ4
  COM3        3E8-3EF        IRQ4 or IRQ11
 
COM B (Serial Port B):

Port Select   Port Address   Interrupts

  COM2        2F8-2FF        IRQ3
  COM4        2E8-2EF        IRQ3 or IRQ10