This gem arrived yesterday. It's a Wang Microsystems PC361/20S. It has some interesting features for a system that was out in 1991-1992. The motherboard looks proprietary to Wang, and it contains the video and I/O subsystems. The video is a Chips & Technologies chipset with 512KB memory (I think). It has a 20MHz 386SX CPU and 4MB of memory. A Maxtor 7345AT 340MB HDD and a Sony 1.44MB 3.5" FDD. There's also an internal modem. I was surprised to discover that it has a PS/2 mouse port, and I didn't realize that the technology was as old as it was.
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I saw it on eBay and threw in a low bid at the last moment because the shipping was high. My bid of $12.50 won. I thought that if the unit wasn't working, I might be able to repurpose the case. I really want a nice-looking baby-AT horizontal case. It turned out that this is not a standard baby-AT case because of the proprietary Wang motherboard. The seller did not provide any good pictures of the rear of the unit and showed only that the unit turned on.
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I was afraid of seeing the corrosion on the motherboard when I opened the case (which wasn't locked), but I was thrilled by the foresight of using a replaceable battery with a header. And it did boot up, but the CMOS had lost all settings. This line of Wang computers uses software-based BIOS configuration, and it took me a little time to track down the right program, but once I did, everything pretty much worked as it should. I really appreciated the motherboard diagram that was a sticker on the inside of the case.
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Overall, I really like the looks and quality of this system. You can tell that it is very well-made. I can't find much online about it, except for an old PC Mag review of a similar model. Once I have a chance to clean it up, replace the battery, and add a new HDD, I think that this will be my 386-class machine.