Intel MCS-51 Introduced in 1980, it has become the industry standard for embedded control. Intel offers a wide variety of 8051 versions with different configurations of on-board EPROM/ROM. Also low power, high integration, and specialized parts are also offered. Four-Volume Set of Intel® 64 and IA-32 Architectures Software Developer’s Manuals. This set consists of volume 1, volume 2 (combined 2A, 2B, 2C, and 2D), volume 3 (combined 3A, 3B, 3C, and 3D), and volume 4. This set allows for easi. The 8051 Architecture Overview section describes: Memory Classes and Layout of the classic 8051, extended 8051 variants, and the NXP 80C51MX architecture CPU Registers of 8051 variants and the 251 architecture. The picture below shows the object module flow and µVision components (in green) that can be used.