21–30 of 171 posts
That's amazing - do you have any info on the underlying implementation?
It's a fully emulated PC: CPU, memory, hard drive, … The CPU especially took me very long to get right with all the details to run Windows 98. The code is here: https://github.com/copy/v86
Where does one start with such thing? I mean, where do I read how to emulate CPU (or at least how CPU works, so I would be able to come up with how to emulate it by myself), how does PS/2 work, how to boot an image from BIOS?
University courses? I'm pretty sure CPUs were a huge part of my first year of CS.
I didn't learn much more than assembly 101. I doubt I could emulate much real hardware. Certainly not a PC of all things... A gameboy looks more accessible...
Where does one start with such thing? I mean, where do I read how to emulate CPU (or at least how CPU works, so I would be able to come up with how to emulate it by myself), how does PS/2 work, how to boot an image from BIOS?
University courses? I'm pretty sure CPUs were a huge part of my first year of CS.
That's amazing - do you have any info on the underlying implementation?
It's a fully emulated PC: CPU, memory, hard drive, … The CPU especially took me very long to get right with all the details to run Windows 98. The code is here: https://github.com/copy/v86
Where does one start with such thing? I mean, where do I read how to emulate CPU (or at least how CPU works, so I would be able to come up with how to emulate it by myself), how does PS/2 work, how to boot an image from BIOS?
University courses? I'm pretty sure CPUs were a huge part of my first year of CS.
At my school and every other school I'm remotely familiar with, the knowledge needed to emulate a CPU would be covered in upper division computer engineering courses, and not covered by CS undergrads at all, certainly not in their first year.
(command as in command.com)
Where does one start with such thing? I mean, where do I read how to emulate CPU (or at least how CPU works, so I would be able to come up with how to emulate it by myself), how does PS/2 work, how to boot an image from BIOS?
University courses? I'm pretty sure CPUs were a huge part of my first year of CS.
How would v86 compare to jslinux speedwise? http://bellard.org/jslinux/ ELKS in javascript would be nice as well, you would get the ultimate speedy portable unix ecosystem in the browser. https://github.com/jbruchon/elks
Primarily due to the use of asm.js. I intend to implement a JIT similar to QEMU's tcg as soon as Web Assembly supports it: https://github.com/WebAssembly/design/blob/master/FutureFeat...
Where does one start with such thing? I mean, where do I read how to emulate CPU (or at least how CPU works, so I would be able to come up with how to emulate it by myself), how does PS/2 work, how to boot an image from BIOS?
Here are some resources:
http://css.csail.mit.edu/6.858/2014/readings/i386/toc.htm
The official intel manuals
http://ref.x86asm.net/geek.html
http://stanislavs.org/helppc/idx_hardware.html
oh the irony, Win98 was the MS "internet as desktop" release. Least favorite OS ever Awesome project though!
My favorite 9x OS is 98 SE (which was a stand-alone release, not a service pack). But 98 "first edition" did add substantial features to 95: IE 4, multi-monitor support, sfc was added (which was useful because 9x got corrupted a LOT), ACPI support, better plug and play, and better hardware support overall.
98 SE just added USB support out of the box (which was a big deal for those of us trying to use USB mice), IE 5, WebDAV, Windows Explorer improvements, ICS, improved WMP, and all of 98 "first editions" hotfixes and updates. You could make 98 "first edition" into 98 SE more or less, but 98 SE was a nice thing to "just install" and have everything work.
My 1990s/early 2000s OSs looked like this: 3.1, 95, 98, 98 SE, ME, back to 98 SE, and then 2000, XP SP1, and beyond. Skipped XP pre-SP1 as it was a pretty shoddy release compared to 2000 at the time, and ran away from ME screaming.