Intel® 400 Series Chipset On-Package Platform Controller Hub
Online Register Database
ID | Date | Version | Classification |
---|---|---|---|
615146 | 08/09/2019 | 1.2 | Public |
Structural Parameters 1 (HCSPARAMS1) – Offset 4
This register is modified and maintained by BIOS
Bit Range | Default | Access | Field Name and Description |
---|---|---|---|
31:24 | 26d | RW/L | Number of Ports (MaxPorts) This field specifies the number of physical downstream ports implemented on this host controller. The value of this field determines how many port registers are addressable in the Operational Register Space. Default value = 0Eh |
23:19 | - | - | Reserved
|
18:8 | 008h | RW/L | Number of Interrupters (MaxIntrs) This field specifies the number of interrupters implemented on this host controller. Each interrupter is allocated to a vector of MSI and controls its generation and moderation. |
7:0 | 40h | RW/L | Number of Device Slots (MaxSlots) This field specifies the number of Device Context Structures and Doorbell Array entries this host controller can support. Valid values are in the range of 1 to 255. |