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How about THIS -- running an emulated version of the old IBM mainframe system OS-MVS on a LAPTOP -- the TSO terminal is emulating a 3278 IBM terminal which actually had 4 colours !!!
(If you want to try this download the HERCULES emulator and the MVS system from the " MVS Turnkey" project -- this was the last "Unbundled" IBM mainframe release where everything has been put in public domain). Any old IBM Sysprogs out there.
LOL! What would you say that's dated?
Late 70's? xDD
Hi there
around 1975 or so !!!!
Actually Mainframes are making a bit of a comeback -- I can see why -- cheaper than 15,000 licences on client machines !!! and of course the sheer power of these things.
IBM designed some good stuff in those days -- the IBM MVS system is a good introduction to concepts like I/O vs CPU bound, multi-tasking, paging / swap, supervisor (or privileged) mode vs application mode execution etc etc -- features that still barely exist in modern OS'es.
I used to give some courses on basic OS principles -- the IBM MVS system was a good model for the students --taught them the basics that are still valuable today.
I used to give some courses on basic OS principles
It's funny how sometimes Engineers put stuff in and nobody uses it. As example the 386 has 4 rings of execution privilege 0 -3. The only OS I've seen myself that used other than just 0 and 3 was OS/2. If you wrote a DLL it ran at ring 2. But since they didn't really differentiate anything not 3 was running effectively at 0. Too many people were writing DLLs to do whatever they wanted. :)
The other one that comes to mind is the Segment Descriptor Table on the 386. You could construct 48 bit addresses. But I guess people were sick of the old 8086 segment register hassle. So nobody used it. They just set them to 0 and used 32 bit addressing.
Computer Type: Laptop System Manufacturer/Model Number: Toshiba Satellite OS: Host W8.0 x64 Guest W10 x86 Memory: 4 GB DDR 3 Screen Resolution: 1366x768 Hard Drives: 640 GB Sata spinner Other Info: Using VMWare Player to run W10 VM
The company he works for apparently thought it was broken permanently, and they never fixed it. All that was wrong with it was the XP installation was corrupt.
That reminds me, when I was a mechanic there was a pile of junk in the garage. On a slow day I looked through the pile. At the bottom was a pnumatic chisel. I plugged it into the compressed air line. It immediately went off. Jazzing the trigger did nothing. It just kept going. Seems that was why it was chucked in the pile. When the Snap-On guy came in later that week I gave him a few dollars for the trigger spring. It worked fine after the spring was inserted. :)
Computer Type: Laptop System Manufacturer/Model Number: Toshiba Satellite OS: Host W8.0 x64 Guest W10 x86 Memory: 4 GB DDR 3 Screen Resolution: 1366x768 Hard Drives: 640 GB Sata spinner Other Info: Using VMWare Player to run W10 VM
That reminds me, when I was a mechanic there was a pile of junk in the garage. On a slow day I looked through the pile. At the bottom was a pnumatic chisel. I plugged it into the compressed air line. It immediately went off. Jazzing the trigger did nothing. It just kept going. Seems that was why it was chucked in the pile. When the Snap-On guy came in later that week I gave him a few dollars for the trigger spring. It worked fine after the spring was inserted. :)
xD!!!
I freaking love it when stuff like that happens!
New to this forum so may not get this process right.
I have Open Shell (v4.4.131) installed. Works fine but I have to click the start menu button a few time to get the classic two columns menu on the screen. The W10 start menu is not hidden and...
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