Intel 386 - Manual (Page 570)

D-5
SYSTEM REGISTER QUICK REFERENCE
Asynchronous Serial I/O Channel 0 (COM1)
F4F8H 03F8H Byte RBR0/TBR0/DLL0 XX/XX/02H
F4F9H 03F9H Byte IER0/DLH0 00H/00H
F4FAH 03FAH Byte IIR0 01H
F4FBH 03FBH Byte LCR0 00H
F4FCH 03FCH Byte MCR0 00H
F4FDH 03FDH Byte LSR0 60H
F4FEH 03FEH Byte MSR0 X0H
F4FFH 03FFH Byte SCR0 XX
Clock Generation and Power Management
F800H Byte PWRCON 00H
F804H Word CLKPRS 0000H
Device Configuration Registers
F820H Byte P1CFG 00H
F822H Byte P2CFG 00H
F824H Byte P3CFG 00H
F826H Byte PINCFG 00H
F830H Byte DMACFG 00H
F832H Byte INTCFG 00H
F834H Byte TMRCFG 00H
F836H Byte SIOCFG 00H
Parallel I/O Ports
F860H Byte P1PIN XX
F862H Byte P1LTC FFH
F864H Byte P1DIR FFH
F868H Byte P2PIN XX
F86AH Byte P2LTC FFH
F86CH Byte P2DIR FFH
F870H Byte P3PIN XX
F872H Byte P3LTC FFH
F874H Byte P3DIR FFH
Table D-1. Peripheral Register Addresses (Sheet 5 of 6)
Expanded
Address
PC/AT
Address
Access Type
(Byte/Word)
Register Name Reset Value
NOTES:
1.
Byte pointer in flip-flop in DMA determines which register is accessed.
2. Shaded rows indicate reserved areas.