Does anyone have an example of using SRAM? I have setup a board definition using: ```        SRAMResource(0,     # Default name = "sram"
            cs_n="G3",        # All control signals are Active Low
            oe_n="F3",
            we_n="G2",
            dm_n="F4 E4",     # bank select (lower and upper)
            #  A0 ---------------------------------------------------- A17
            a="C5 C6 C7 B6 B5 B4 B3 A1 C10 C11 A10 B11 B9 A9 B10 C9 A7 A2",
            #  D0 ----------------------------------------- D5
            d="J5 H5 H6 G5 G4 F1 E2 F2 F5 D1 E3 D2 C1 B1 C2 B2",
            attrs=Attrs(IO_STANDARD="LVCMOS33"),
        ),
```