1. The 2A03 is an 8-bit microprocessor manufactured by Taiwan Semiconductor. It is based on the MOS 6502 architecture and was used in popular home computer systems, such as the Commodore 64, Amiga, and Apple II, during the 1980s.
2. The 2A03 is made up of two major components: the 8-Mode 8-bit CPU (Central Processing Unit) chip, and the 2KB SRAM (Static Random Access Memory) chip. The 8-Mode CPU consists of five 8-bit registers, a 16-bit program counter, and an 8-bit stack pointer. The 2KB SRAM chip stores up to 1KB of program memory, and also stores I/O and RAM memory. Other features of the 2A03 include a 2-bit input/output port, 64 bytes of RAM for zero page addressing, and a 15-byte interrupt vector.