在51下的外挂硬盘和FLASH的MP3方案程序以及原理图-under 51 in the store and FLASH disk MP3 program procedures, and drawings

一份详细的mmu讲解，对于了解mmu的结构很有帮助！-a detailed MMU talks, the understanding of the structure MMU helpful!

TBsoft-GUI V1.00 8051评估版免费下载，使用Keil C51 V7.06A作为编译器，可用于MCS-51系列单片机和单色LCD，支持键盘设备，支持使用小汉字库，允许用户程序外挂LCD和键盘驱动程序。-TBsoft-GUI V1.00 8051 evaluation version free download, using the Keil C51 V7.06A as the compiler can be used for MCS-51 family of single chi