Linux 3.4.0 (uclinux/Linux MMU-less) with uClibc 0.9.29 and busybox 1.20.2.
Alvie
console [ttySZ0] enabled, bootconsole disabled ZPUINO: UART at 0x8800000, irq 1 brd: module loaded loop: module loaded Registering ZPUino SPI driver ZPUino: probing for SPI controller zpuino_spi zpuino_spi.0: master is unqueued, this is deprecated zpuino_spi zpuino_spi.0: at 0x0A800000 ZPUino. SPI controller initialized 00281000 mousedev: PS/2 mouse device common for all mice mmc_spi spi0.0: SD/MMC host mmc0, no DMA, cd polling Waiting for root device /dev/mmcblk0p1... mmc_spi spi0.0: setup: unsupported mode bits 4 mmc_spi spi0.0: can't change chip-select polarity mmc0: card lacks mandatory switch function, performance might suffer. mmc0: new SDHC card on SPI mmcblk0: mmc0:0000 SD 30.8 GiB mmcblk0: p1 VFS: Mounted root (ext2 filesystem) readonly on device 179:1. Freeing init memory: 64K (1000 - 11000) BusyBox v1.20.2 (2012-10-17 09:44:15 WEST) hush - the humble shell / # uname -a Linux (none) 3.4.0-uc0 #533 PREEMPT Wed Oct 17 19:04:33 WEST 2012 zpu GNU/Linux / #Alvie