Check the listing for details. BUILD THE COSMAC ELF 1802 FIRST HOMEBUILT COMPUTER DIY PLANS & MANUAL ON CD. Condition: Brand New. Listed at 9.00 USD. Originally published in Popular Electronics from 1976 to 1978, These Plans have been digitally edited, see sample pages in listing's pictures. Part 1: Simple-to-build computer trainer can be expanded for advanced applicationsPart 2: Some hardware improvements and more programming detailsPart 3: How to expand memory, plus more programsPart 4: Build the PIXIE Graphic Display - Adding one chip to the Elf provides complete video interface and animated graphics capability for less than $25Part 5: Build A Cassette InterfacePart 6: Expanding The ELFPlus bonus files including the Manual For The RCA CDP1802 Microprocessor, see picture number 4. IF YOU PREFER USB INSTEAD OF CD LET ME KNOW AT TIME OF PURCHASE. THANKS FOR LOOKING.