12th Generation Intel® Core™ Processors Datasheet Volume 2 of 2
ID | Date | Version | Classification |
---|---|---|---|
767625 | 07/13/2023 | Public |
Graphics Control (GGC_0_0_0_PCI) – Offset 50
All the bits in this register are Intel TXT lockable.
Bit Range | Default | Access | Field Name and Description |
---|---|---|---|
15:8 | 0x5 | RW/L | (GMS) This field is used to select the amount of Main Memory that is pre-allocated to support the Internal Graphics device in VGA (non-linear) and Native (linear) modes. The BIOS ensures that memory is pre-allocated only when Internal graphics is enabled. |
7:6 | 0x0 | RW/L | (GGMS) This field is used to select the amount of Main Memory that is pre-allocated to support the Internal Graphics Translation Table. The BIOS ensures that memory is pre-allocated only when Internal graphics is enabled. |
5:3 | 0h | RO | Reserved |
2 | 0x0 | RW/L | (VAMEN) Enables the use of the iGFX engines for Versatile Acceleration. |
1 | 0x0 | RW/L | (IVD) 0: Enable. Device 2 (IGD) claims VGA memory and IO cycles |
0 | 0x0 | RW/L | (GGCLCK) When set to 1b, this bit will lock all bits in this register. |