All the Colibri I/O modules come with a 1Mbit EEPROM on board, that serves to store a few different things;

Vendor, Model and Revision of 'this' board.
Calibration parameters needed to compensate for hardware tolerances.
Test report (if any) from factory.
The driver(s) (i.e. code) of the board, to be executed in the MCU module on behalf of the board.
Any additional parameters, configuration that should survive over time.
Any storage space an on-module co-MCU needs.

Memory Layout

Address	Length	Description
0x0000	4	Contains the value 0xdeadbabe to indicate that it has been initialized.
0x0004	12	Reserved for future use.
0x0010	4	Vendor ID, according to table below.
0x0014	4	Vendor Model identifier. This is specific to each vendor. Vendors are encouraged to add their tables on this page.
0x0018	4	Vendor Hardware Revision, where revision 'A' is written has 0x0041 and revision 'CC' is 0x4343
0x001c	4	Reserved for future use.
0x0020	4	Pointer to Vendor name, in ASCII.
0x0024	4	Length of Vendor name
0x0028	4	Pointer to Model name, in ASCII.
0x002c	4	Length of Model name.
0x0030	4	Pointer to Product Link
0x0034	4	Length of Product Link
0x0038	4	Pointer to Documentation Link
0x003c	4	Length of Documentation Link
0x0040	4	Size of zeptoforth code.
0x0044	4	Size of Web Assembly (wasm) code block.
0x0048	56	Reserved for future use.
0x0080	128	Calibration data, see each I/O module for details
0x0100	256	Test Reports, see each I/O module for details
0x0200	1024	Text area. Links points to here.
0x0600	2560	Vendor defined area.
0x1000	12288	Reserved for future use.
0x4000	16384	Driver software/code in zeptoforth.
0x8000	16384	Driver software/code in WebAssembly.
0xc000	16384	Reserved for future use.
0x10000	65536	Reserved for co-MCU on I/O module.

Colibri EEPROM Layout