PCEUMU: a wip i386/i686/x86_64 and maybe ARM emulator

[last wyvern]

github?

[unkempt eagle]

Interesting. It would be great to know more about it. What are the goals?

[feral mesa]

Will there be some kind of lib to easily add new targets/machines?

[signal stump]

https://github.com/lucas-hooghof/PCEMU

[signal stump]

Well i want to try and make a sort of QEMU Virtualbox crossbreed and also its also for learning about CPU architectures

[signal stump]

I guess i would make a way to load a binary and then use those functions instead of the already setup functions

I just got my first instruction working but before i do the rest im going to create a screen and a config file and maybe a exec to autogenerate a config

[last wyvern]

which arch is it for atm

oh nvm you already said

[signal stump]

well im currently working on the basic i386 part of it

[signal stump]

Anyone interested helping

[unkempt eagle]

I find the project interesting, but I don't know much how such things work. (though I did nand2tetris and also adapted yaze code for one of my projects...)

[feral mesa]

perhaps

[signal stump]

I mean the config stuff tho

And maybe something wise

[signal stump]

So that isnt too hard

Ill get the IN instruction working and then ill show some of it

[feral mesa]

yeah i wanna check out the code :^ )

[signal stump]

I sended the link at the top

[feral mesa]

yep i saw :)

[lyric tapir]

so uhh

just for compat reasons

i will kindly suggest to make the code use something like callbacks to the stdlib functions

just because i love compatibility

[signal stump]

Yh but i can also just use clause gaurds and make it use the system api

[signal stump]

First ever square on the screen

[lyric tapir]

is that like running from a x86 vm

or its just a graphics test

[signal stump]

graphics test

[lyric tapir]

still cool nonetheless

[signal stump]

i have just inplemented the hlt function gonna do IN so i can do 0xE9

[signal stump]

and now it has a configuration

[lyric tapir]

add a select for the bios file

well not really

not now at least

yet

🔥🔥🔥🔥 json

i hate json

but still cool you parsed it on c

[signal stump]

Yeah gonna do that

[signal stump]

Why you hatin on json

[lyric tapir]

idk too javascript for me

[signal stump]

What would be better

[lyric tapir]

i also prefer binary formats

but uhh

probably idk

a custom format

[signal stump]

That would make it easier

And smaller

[lyric tapir]

yeah

harder to edit

but i mean

if you dont have a hex editor you are not a true developer

otherwise you can make a config build function

[signal stump]

Yeah but i can also make some sort of json to bin

Or config creator exec

[lyric tapir]

or use flags🙏

like qemu

[signal stump]

I hate flags

I just hate parsing them

[lyric tapir]

just add a big ass flag with , as a sepparator

[signal stump]

Ym like -flags bios.bin,thingalling.iso,1mb,-wfi

[lyric tapir]

not like that

because its position determinant

and people will always be dumb

so more like

-flags flagtype,flagdata,...

[signal stump]

I could so that but i need to parse a huge fucking string i can try to

[lyric tapir]

yeah lmao

the string would be huge

i mean just stick to json ngl

its not the best or the most used for flags

but eh

it works

[signal stump]

I might make it support diffrent types based on the first passed argument

Might just jump back behind my computer even tough its 1pm

To add multiple parsing options

[signal stump]

[bits 16]

jmp 0xF000:0x0000

times 16-($-$$) db 0``` works

_start:
    mov ax,0xB000
    mov ds,ax
    mov [ds:0x8000],byte 'A'

    hlt``` and everything except the mov[ds:0x8000] line works

[signal stump]

less goooo

even better

[feral mesa]

try loading seabios instead

[signal stump]

I have like a few instructions so i wont get alot if even anything

[feral mesa]

okay

is the code pushed?

i wanna look

@signal stump

nvm its not

could you perhaps?

[signal stump]

Check cpu branch

[feral mesa]

looks good

[deft knoll]

the current state of this is probably like i386 if it were a RISC

[signal stump]

Yeah cuz it is a WIP

[viral wing]

btw if youre using make you should probably build all objects separately then link later so that you can use the -j flag

[signal stump]

Yeah i am doing that

[signal stump]

I think imma restart using cpp

[spark sluice]

you dont need to restart

you can just rename files from .c to .cpp

which is kinda the entire point of c++ lol

[signal stump]

but i want to rewrite using classes

[deft knoll]

then refactor

[royal canyon]

Isn't VirtualBox based on QEMU or a fork of a sort?

[spark sluice]

virtualbox used some of qemus hardware device code and used qemus old tcg as a fallback when it was first released but that code is long gone

[signal stump]

even if i wanted to im not sure if i would need to fully emulate stuff like the i2c and northbridges

and i do not know how to find it

[spark sluice]

you can always just look at seabios source to see what it needs

[signal stump]

I cant find anything about memeory

[spark sluice]

i mean isnt memory just memory

ignoring the pcie memory cards and hotplug stuff that qemu can emulate

[signal stump]

Still

[signal stump]

I sended a mail to the seabios mailing list hoping for a awnser if i get a awnser i will use seabios

[arctic magnet]

you can still use tho

if you dont intend to make ur emulator commercial i guess

[signal stump]

Would just be open source

I guess i will see if i dont get any awnsers i might as wel write a bios myself

[feral mesa]

then its fine

so use seabios lol

[signal stump]

i made a lil config generator for my recreation of my stuff because C was not fun

https://github.com/lucas-hooghof/PC-Emu

[cyan cove]

UmU what's this 😳

[signal stump]

What?