Apple Memory SPD Data (Type 130)

Source: the AppleSmBios.h header of OpenCore, Include/Apple/IndustryStandard.

Holds the serial presence detect (SPD) data of a memory module, or a part of it, e.g. the first 176 bytes of the SPD data of the DDR3 modules of apple/imac11-3.bin. The firmware adds a structure for each memory module. The Intel reference code gives type 130 to the Intel Active Management Technology information too.

Table 1. Apple Memory SPD Data structure
Offset	Version	Name	Length	Value	Description
`0x00`	2.0+	Type	`BYTE`	`130`	Apple Memory SPD Data indicator
`0x01`	2.0+	Length	`BYTE`	Varies	Length of the structure
`0x02`	2.0+	Handle	`WORD`	Varies
`0x04`	2.0+	Memory Device Handle	`WORD`	Varies	Handle of the memory device (type 17) of the module
`0x06`	2.0+	Offset	`WORD`	Varies	Offset of the data within the SPD data of the module
`0x08`	2.0+	Size	`WORD`	Varies	Length of the data, in bytes
`0x0A`	2.0+	Data	Varies	Varies	SPD data