I/O Decode Ranges and I/O Enables (ESPI_IOD_IOE) – Offset 80 - 001 - ID:834576 | Intel® 800 Series Chipset Family Platform Controller Hub (PCH), Volume 2

Intel® 800 Series Chipset Family Platform Controller Hub (PCH), Volume 2

ID	Date	Version	Classification
834576	10/10/2024	001	Public

I/O Decode Ranges and I/O Enables (ESPI_IOD_IOE) – Offset 80

Bit Range	Default	Access	Field Name and Description
31	0h	RO	Reserved (RSVD_5) Reserved
30	1h	RW	RTC Enable (RTCE) Enables decoding of I/O locations 70h-77h to PCH RTC unit.
29	0h	RW	Microcontroller Enable #2 (ME2) Enables decoding of I/O locations 4Eh and 4Fh to eSPI.
28	0h	RW	SuperI/O Enable (SE) Enables decoding of I/O locations 2Eh and 2Fh to eSPI.
27	0h	RW	Microcontroller Enable #1 (ME1) Enables decoding of I/O locations 62h and 66h to eSPI.
26	0h	RW	Keyboard Enable (KE) Enables decoding of the keyboard I/O locations 60h and 64h to eSPI.
25	0h	RW	High Gameport Enable (HGE) Enables decoding of the I/O locations 208h to 20Fh to eSPI.
24	0h	RW	Low Gameport Enable (LGE) Enables decoding of the I/O locations 200h to 207h to eSPI.
23:20	0h	RO	Reserved (RSVD_4) Reserved
19	0h	RW	Floppy Drive Enable (FDE) Enables decoding of the FDD range to eSPI. Range is selected by LIOD.FDE
18	0h	RW	Parallel Port Enable (PPE) Enables decoding of the LPT range to eSPI. Range is selected by LIOD.LPT.
17	0h	RW	Com Port B Enable (CBE) Enables decoding of the COMB range to eSPI. Range is selected LIOD.CB.
16	0h	RW	Com Port A Enable (CAE) Enables decoding of the COMA range to eSPI. Range is selected LIOD.CA.
15:13	0h	RO	Reserved (RSVD_3) Reserved
12	0h	RW	FDD Range (FDD) The following table describes which range to decode for the FDD Port Bits Decode Range 0 3F0h - 3F5h, 3F7h (Primary) 1 370h - 375h, 377h (Secondary)
11:10	0h	RO	Reserved (RSVD_2) Reserved
9:8	0h	RW	LPT Range (LPT) The following table describes which range to decode for the LPT Port: Bits Decode Range 00 378h - 37Fh and 778h - 77Fh 01 278h - 27Fh (port 279h is read only) and 678h - 67Fh 10 3BCh - 3BEh and 7BCh - 7BEh 11 Reserved
7	0h	RO	Reserved (RSVD_1) Reserved
6:4	0h	RW	ComB Range (CB) The following table describes which range to decode for the COMB Port Bits Decode Range 000 3F8h - 3FFh (COM 1) 001 2F8h - 2FFh (COM 2) 010 220h - 227h 011 228h - 22Fh 100 238h - 23Fh 101 2E8h - 2EFh (COM 4) 110 338h - 33Fh 111 3E8h - 3EFh (COM 3)
3	0h	RO	Reserved (RSVD) Reserved
2:0	0h	RW	ComA Range (CA) The following table describes which range to decode for the COMA Port Bits Decode Range 000 3F8h - 3FFh (COM 1) 001 2F8h - 2FFh (COM 2) 010 220h - 227h 011 228h - 22Fh 100 238h - 23Fh 101 2E8h - 2EFh (COM 4) 110 338h - 33Fh 111 3E8h - 3EFh (COM 3)