I found an old DOS machine. A Sanyo MBC-550 at my parents house. It was my grandfather's. He used it all the time. It boots up with the DOS 2.11 disc but I cannot find the keyboard. I bought a keyboard off eBay that's a five-pin serial and it does not work. When I connect it to the computer it just freezes the computer. It does not boot when it's connected to the keyboard. Any suggestions? I have no experience with something this old. There's not much information online about it. Before I spend another $40 on a keyboard that doesn't work. I wanted to see if y'all had any suggestions
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