RCA started its microprocessor development with a two chip implementation of 1802, the 1801. The 1802 was the primary microprocessor architecture for RCA. It was created in radiation hardened versions for military and space applications.
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RCA
RCA COSMAC 1801
General General Information Most microprocessor collector’s are familiar with the RCA COSMAC 1802. The 1802 was RCA’s first single chip microprocessor. As a footnote it is mentioned that the 1802 is a single chip implementation of the two chip 1801. The first COSMAC and RCA’s first microprocessor is the CDP1801 (and the world’s 1st CMOS microprocessor). …
RCA COSMAC 1802
General General Information The COSMAC 1802 was RCA’s first single chip microprocessor. The 1802 is a single chip implementation of the two chip 1801. The fundamental architecture and technology of the 1802 was the same as the CDP1801. It was silicon gate CMOS and had similar packaging. The 1801 was slower at 2Mhz initially and then …
RCA COSMAC 1804
General General Information 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 …
RCA COSMAC 1805
General General Information The COSMAC 1805 was a ROM-less version of the 1804. It’s primary use was for prototyping 1804 functions or for 1804 based systems with larger, external, memory requirements. It did include the 1804 RAM and Counter/Timer. Production 3rd Quarter 1981 Designers Lead Designer: Joe Weisbecker, Team Lead: Jerry Herzog Architecture Type Data …
RCA COSMAC 1806
General General Information The COSMAC 1806 was a ROM-less and RAM-less version of the 1804. It’s primary use was for prototyping 1804 functions or for 1804 based systems with larger, external, memory requirements. It did include the 1804 Counter/Timer. Production 3rd Quarter 1981 Designers Lead Designer: Joe Weisbecker, Team Lead: Jerry Herzog Architecture Type Data …