博创UP

这是一个不到2000行的操作系统，巧妙地利用ARM9 CPU的内存管理单元(MMU)实现进程的切换。ARM9的4G虚拟地址可分成128个进程空间，每个32M。虽然它们的虚拟地址(VA)都是0-(32M-1)，但是对应的MVA(Modified vitual address,由虚拟地址VA和进程号PID组合而来)不一样，设置MVA对应的页表指向不同物理地址就可以很方便地让各进程运行空间相互隔开。代码很少，注释丰富，希望能对想理解操作系统、了解ARM体系结构的朋友有所帮助。 -This is a trip of less than 2000 operating system, cleverly using ARM9 CPU memory management unit (MMU) to achieve the switching process. ARM9 4G virtual address can be divided into 128 process space, each 32M. While their virtual address (VA) are 0- (32M-1), but the corresponding MVA (Modified Virtual address, and by the virtual address VA and the process of portfolio from PID) not the same, set MVA corresponding page table at the different physical address can be very easy to let the the process of separating the mutual operation of space. Code rarely Notes rich, in hopes of understanding the operating system, understanding the ARM architecture friends help.

这也是ARM的一个调试用的源程序-This is an ARM debug the source

本代码是串口扩展芯片GM814X在 Arm9―usos上使用的实例， 包括：芯片说明Datasheet，芯片在51单片机上的驱动，以及特有的（我编写的）芯片在s3c2410上的驱动。 -Expansion of the code is the serial chip GM814X in Arm9-usos use examples, including: chip note Datasheet, on-chip single-chip microcomputer in 51 drivers, as well as the unique (I am prepared) S3C2410 chip in the drive.

摩托罗拉电路板极的电磁兼容设计，这是摩托罗拉公司的内部资料。希望大家喜欢。- Motorola electric circuit anode electromagnetic compatibility design, this is the Motorola company s restricted data. Hoped everybody likes.

MSP430的一个RTC低功耗demo程序-MSP430 low-power RTC in a demo program

armlinux入门笔记，很好，很强大，还要20字-armlinux entry notes, very good, very strong

- Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the disclaimer below in the documentation and/or other materials provided with the distribution.

描述在嵌入式系统设计时,软件和硬件设计的相互统一的方法,有一定的参考价值-described in embedded system design, software and hardware design mutually integrated approaches, there is a certain reference value

uclinux讲座之（二）.rar-Basis (2). Rar

4510 bootloader的实现与分析-4510 Bootloader the Implementation and Analysis