11. Getting StartedCOSMAC VIP (Video Interface Processor)CDP18S711 is a complete computer on a singleprinted-circuit card. It includes the following:*RCA CDP1802 Microprocessor (91 instructions)*2048-byte RAM*Built-in hex keyboard (modern reliable touchpadtype)*Graphic video display interface (standard videooutput)*100-byte-per-second audio cassette interface*Regulated power supply (wall-pack type)*Crystal clock*Sound circuits (for signal tones and games)*512-byte ROM operating system*Comprehensive documentation*20 ready-to-use video game programs*Unique CHIP-8 language (31 easy-to-use in-structions)*On-card RAM expansion up to 40% bytes*On-card parallel 1/0 port*Connector for extensive external expansioncapabilityCOSMAC VIP was designed for home hobby use. Justadd an inexpensive video display and an audio cassetterecorder for program storage. You don't need expensive,hidden extras such as power supply, computer terminal,external keyboard, or additional RAM. COSMAC VIPprovides everything needed for years of creativecomputer fun for the whole family. With COSMAC VIPyou're immediately ready to play video games,experiment with computer art or animation, write yourown programs with a new language called CHIP-8, or gethands-on experience using machine language.With COSMAC VIP you can easily create pictureson the display screen and move them around. Thisfeature is invaluable for video games and not usuallyavailable with computers costing several times asmuch. The software you need to use your computer isprovided free instead of at added cost or not at all.Simplified operation was a primary design goal sothat you don't have to waste a lot of time learning andremembering complex operating procedures.COSMAC VIP uses state-of-the-art devices coupledwith an efficient design. Full expansion capabilityallows you to inexpensively tailor COSMAC VIP tospecific applications such as model railroad control,music synthesis, or color graphics. You will soon.discover that COSMAC VIP provides a refreshinglynew, lower-cost alternative to conventional computerswhich have been aimed more toward mathematicsand business than fun.What This Manual CoversT'his manual serves several purposes. It lets you getstarted playing video games with minimum effort. justset up your system as described in this section and learnhow to use the operating system and cassette interface asdescribed in the next section. You can immediately useall the video games in Appendix D without going anyfurther.If you want to learn to write your own programs,Section III describes an easy language to start with calledCHIP-8. Most of the programs in Appendix D weredesigned using this language. CHIP-8 looks somewhatlike machine language but is quicker to learn and easierto use than many of the more common high-levellanguages. It also requires much less RAM, which save8you a lot of money.