Thanks. I've done that and i have gotten a gpio output. Should it look like this? gpiobase+0x0000: 0xffffffff (GPIO_USE_SEL) gpiobase+0x0004: 0xffffffff (GP_IO_SEL) gpiobase+0x0008: 0xffffffff (RESERVED) gpiobase+0x000c: 0xffffffff (GP_LVL) gpiobase+0x0010: 0xffffffff (RESERVED) gpiobase+0x0014: 0xffffffff (RESERVED) gpiobase+0x0018: 0xffffffff (GPO_BLINK) gpiobase+0x001c: 0xffffffff (GP_SER_BLINK) gpiobase+0x0020: 0xffffff03 (GP_SB_CMDSTS) gpiobase+0x0024: 0xffffff03 (GP_SB_DATA) gpiobase+0x0028: 0xff03 (GPI_NMI_EN) gpiobase+0x002a: 0xffff (GPI_NMI_STS) gpiobase+0x002c: 0xffffff03 (GPI_INV) gpiobase+0x0030: 0xffffff03 (GPIO_USE_SEL2) gpiobase+0x0034: 0xffffff03 (GP_IO_SEL2) gpiobase+0x0038: 0xffffff03 (GP_LVL2) gpiobase+0x003c: 0xffffff03 (RESERVED) gpiobase+0x0040: 0xffffffff (GPIO_USE_SEL3) gpiobase+0x0044: 0xffffffff (GP_IO_SEL3) gpiobase+0x0048: 0xffffffff (GPIO_LVL3) gpiobase+0x004c: 0x0130ffff (RESERVED) gpiobase+0x0050: 0xffffffff (RESERVED) gpiobase+0x0054: 0xffffffff (RESERVED) gpiobase+0x0058: 0xffffffff (RESERVED) gpiobase+0x005c: 0xffffffff (RESERVED) gpiobase+0x0060: 0xffffffff (GP_RST_SEL1) gpiobase+0x0064: 0xffffffff (GP_RST_SEL2) gpiobase+0x0068: 0xffffffff (GP_RST_SEL3) gpiobase+0x006c: 0xffffffff (RESERVED) gpiobase+0x0070: 0x00022600 (RESERVED) gpiobase+0x0074: 0x0002260a (RESERVED) gpiobase+0x0078: 0xffffffff (RESERVED) gpiobase+0x007c: 0xffffffff (RESERVED)