Linux0.11-缓冲区初始化-memory_end = (1<<20) + (EXT_MEM_K<<10);memory_end &= 0xfffff000;if (memory_end > 16*1024*1024)memory_end = 16*1024*1024;if (memory_end > 12*1024*1024) //内存>12M 设置高速缓冲区大小4Mbuffer_memory_end = 4*1024*1024;else if (memory_end > 6*1024*1024)// 内存>6M 设置高速缓冲区大小2Mbuffer_memory_end = 2*1024*1024;elsebuffer_memory_end = 1*1024*1024;//否则设置高速缓冲大小1Mmain_memory_start = buffer_memory_end;#ifdef RAMDISKmain_memory_start += rd_init(main_memory_start, RAMDISK*1024);#endif