Discussion Topic of the Week: Have you ever owned a computer with two different primary CPUs in it?
A fellow donated an Epson QX-10 to my collection some years ago, but I have never run it because I lack the proper monitor cable. This fascinating machine ran the CP/M operating system and came with a full suite of office-centric software tools, called VALDOCS, wrapped in a semi-graphical user interface layer that ran on top of its host OS.
As far as I've noticed from my QX-10, one of the coolest things about it is that it has specially engineered low-profile 5.25″ floppy drives. That was a unique thing to have in 1983, and it made the QX-10′s case very dense and compact.
Discussion Topic of the Week: What do you think the world world be like if CP/M, rather than MS DOS (PC DOS), shipped on the IBM PC in 1981?
I've never owned a Visual 1050 Personal Computer System (seen here), but I have an old Visual brand terminal that uses the same (or a very similar) keyboard. That's the first thing that comes to mind when I see this, because it's a distinctively wide, flat keyboard.
The 1050 sported a Z80 CPU and ran the CP/M operating system, the grandfather of MS-DOS. Curiously, even though CP/M was a popular platform for business computers in the late 1970s and early 1980s, I only have a a handful of pure CP/M-based machines in my collection. (My favorite such machine is probably the Kaypro II.)
In regard to the chart in the advertisement above, it's interesting to note that it was pretty easy to undercut IBM, price-wise, not long after the IBM PC came out. Fast advances in IC design allowed computer makers to inexpensively cram more functions (think serial, parallel, game ports, disk controller, graphics card, etc.) directly onto motherboards instead of offloading them onto separate plug-in cards. While the 1050 was not an IBM PC clone, true PC clone makers took advantage of this effect to hollow out the inside of IBM's hold on the PC market from the bottom up.
Discussion Topic of the Week: Do you have a favorite machine that runs CP/M?
The Sanyo MBC-1100 (1982) was a Z80-A-based business machine that ran CP/M as its operating system. It was one of many, many Z80 business machines from that era designed to run CP/M.
Japanese computer manufacturers were just breaking into the U.S. computer market at the time, so the Sanyo MBC-1100 would have likely been a curiosity in an American office setting.
Discussion Topic of the Week: Have you ever used a Japanese-designed vintage computer? Tell us about it.