Description
The COSMAC 1804 was RCA's first single chip microcomputer. The 1804 was an 1802 with on chip 2KB of mask programmable ROM and 32 bytes of RAM added. It is almost pin compatible with the 1802 except pin 16 differs on the 1802 it is Vcc and on the 1804 it is EMS. The 1804 is software compatible with the 1802 and added 22 instructions.
