ScuzzBlog: Diaries May 2019 Entry 17th May 2019: Post 01: Oric-1 : Power and Polarity Oric-1 : Power and Polarity One little annoyance that seems to dog me is the lack of information on a computer regarding the power supply. Worse is the issue of the polarity of the middle pin say. So when I get the information I do tend to leave notes either on the computer or on post notes inside with the packaging. A further problem comes when you try to source a suitable power supply. Many have a multitude of settings and are often very difficult to read without a large magnifying glass. I have never really understood the mystery to be honest. Just a simple plus or minus would do etched on the case with the voltage stated. I have several of these modern power supplies and they are so annoying in the way they vary in dealing with the middle pin polarity. The units are easy to switch in terms of voltage, but the pin can vary in the way it needs to be configured. With respect to the Oric-1 I read a few posts on various forums that state that I needed an ordinary unregulated power supply that can output 9V at 650 mA. With a polarity of (-) outside, (+) inside. And so central pin needs to be plus. I have never found a 650 mA unit as all those I have are 300 mA. Seem to work. So to check the power supply I had I pulled a couple of my Orics with dodgy displays and ran them on the power supplies. They all worked and although the one screen was a little faint were fully functional and performed OK. I have included also some scans from the manual to get any Oric user started. I also include some BASIC programs from a popular computer magazine by way of example. Not a great fan of the Oric-1. I find the keyboard a little annoying. Otherwise a perfectly usable BASIC machine. Oric-1 : Power and Polarity

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Last updated 17th May 2019

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