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2
Technical Reference
2.1
Addressable Memory
The Intel® Compute Card utilizes up to 4 or 8 GB of addressable system memory depending on
the model. Typically the address space that is allocated for PCI Conventional bus add-in cards,
PCI Express configuration space, BIOS (SPI Flash device), and chipset overhead resides above the
top of DRAM (total system memory). On a system that has 4 GB of system memory installed, it is
not possible to use all of the installed memory due to system address space being allocated for
other system critical functions. These functions include the following:
64 Mb BIOS/SPI Flash device for
128 Mb BIOS/SPI Flash device for
Local APIC (19 MB)
Direct Media Interface (40 MB)
PCI Express configuration space (256 MB)
SoC base address registers PCI Express ports (up to 256 MB)
Integrated graphics shared memory (64 MB)
The Intel® Compute Card provides the capability to reclaim the physical memory overlapped by
the memory mapped I/O logical address space. Physical memory is remapped from the top of
usable DRAM boundary to the 4 GB boundary to an equivalent sized logical address range located
just above the 4 GB boundary. All installed system memory can be used when there is no overlap
of system addresses.
2.2
Connector
This section describes the connector available on the Intel® Compute Card. The connector is
separated into two sections: a Type C-compliant portion and an extended portion. The Type C
portion supports Type C-compliant connections including video with audio and USB. The
extended portion supports video with audio, USB, and PCIe. Power is supplied to the card from
the device the Compute Card is plugged into using the Type C portion of the connector.
CD1M3128MK
CD1IV128MK
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