Siemens SX1 (``sx1``, ``sx1-v1``)
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The Siemens SX1 models v1 and v2 (default) basic emulation. The
emulation includes the following elements:

-  Texas Instruments OMAP310 System-on-chip (ARM925T core)

-  ROM and RAM memories (ROM firmware image can be loaded with
   -pflash) V1 1 Flash of 16MB and 1 Flash of 8MB V2 1 Flash of 32MB

-  On-chip LCD controller

-  On-chip Real Time Clock

-  Secure Digital card connected to OMAP MMC/SD host

-  Three on-chip UARTs