I worked in the laboratory of Nova Eletrônica magazine and later in the engineering of the Pological. The CP200 project was a lonely and discredited initiative, in an attempt to slow down on the NE-Z8000. Since the Nez-8000 software was identical to the ZX81, it was just to reproduce the logic of the ZX81 that the slow would work. The problem was that the ZX81 had a dedicated chip hardware, which made work difficult. I worked for several weeks, in a parallel work, with many tips of tests of a logic analyzer HP plugged into a ZX81 and numerous matrix print leaves with the "Disassembler" of the original ROM code. In the end the circuit came out. It was not the identical logic and totally compatible with that of ZX81, but it worked. In the newer versions of CP200 this logic was revised, which made it more compatible with the original. I even implemented the logic in several NE-Z8000, but the marketing decision was to launch a new computer, the CP200. This was my last project still in the magazine Nova Eletrônica. After completing the CP200, I was invited to work at Itautec, which was about to launch the i7000. A few years later I was invited again to return to the group of companies to which the magazine belonged, only this time in Prologic. In my blog I tell these and other stories of my work period in the new electronics and prological. www.alldigital.com.br

I learned some BASIC on one of these. I was about 10 years old, and lost interest mainly because one had to load programs through a cassette tape. I would spend 20 min or more hoping the tape wasn''t damaged and the cassette player had a clean head. If everything went fine I would be able to run a program. If not, it would fail silently. Another option was of course writing programs from scratch before using, but... that was painful.

I had one and experimented a lot with it. Its side connector does not follow the Sinclair pinout, so you cannot plug standard Sinclair peripherals to it. I had to build a re-layout board just to attach a ZX Printer to it, and it workerd flawlessly. I don't know if the CP-200S also has this characteristic...