Kvass (vibecoden't)

[raw prairie]

But yeah I think what happened in #lounge-0 was a fluke lmfao

It got crazy 😭

I would like you to stay

[frigid basin]

nah just make your own C language but with russian keywords atp

[ocean ore]

число случайноеЧисло(){
    вернуть 4;
}

russian c dialect

[minor prairie]

why?

[astral pagoda]

#define int число
#define return вернуть

[minor prairie]

wdym #define void число

число isn't void its prob an int (or some other int variant)

[raw prairie]

why cant i google translate this 😭

google keeps locking up

[astral pagoda]

its pretty much very correct

for the amount of stupid I am

[ocean ore]

idk

[whole heath]

Did you not read how #define works lol

[ocean ore]

oh wait

😭

i didnt even notice

[ocean ore]

i shall ™™™•ª¡™£•¡•™¶£¡™ª•£º™¡ª£ªº™¡ªπ£¡™º–£πº¡™£–¡™ operating system

programming elf crap in bootloader still

have to go through string table

[ocean ore]

i wonder if i should focus on making my kernel for x86-64 too

i want to work on x86-64 for some reason

[ocean ore]

test OS best OS

this idiot better not explode on me when i start implementing the argument parser idioot

idiot

yo wait i think it will

why is it not in the greg section

:(

wait

wheres the stop marker

i forgot the stop marker 💀

REQUEST RESPONSE REQUEST RESPONSE REQUEST RESPONSE

I FORGOT THE STOP MARKER AGAIN

better

https://klipy.com/gifs/ultrakill-v1-18

[ocean ore]

i loaded all the protocol stuffs

i think

idk i have basic crap for a hello world kernel

id say i boot it for my own sanity

[ocean ore]

im gonna do a rugpull and program my kernel for both ppc and x86-64 because i started to like x86-64 a bit

despite all the genuinely evil bullcrap they pull on me sometimes its pretty cool

Kvass (powerpc (32 bit) and x86-64 OS (+related crap))

MUAHAHAAHAHHAHAHAHAHA

i need to finish bootloader either way tho

pretty bold for a kernel that ONLY ACTUALLY EXISTED FOR ONE MONTH

https://cdn.discordapp.com/attachments/1434603991957897258/1481336522149068921/Screenshot_20251001_130130_Discord.gif

[ocean ore]

so i just woke up but my mac has qemu so i decided to check

this is ppc64 qemu on default settings

with smp 2

mac99 qemu explodes if i tell it more than one processor

if this is the same open firmware then i can cook

IT'S EMULATING A WHAT

i need to check their properties

GREGloader SMP

MUAHAHAHAHAHAHAHAHAHAHHAHAHA

ok so what im running is qemu-system-ppc64 -M pseries-9.2 -smp 2

pseries seems to be some reference platform used for linux development

it conveniently happens to use open firmware and support multiprocessing

my best bet for 32 bit though is mac99, i dont have the fancy power10 crap

[ocean ore]

im gonna go compile ppc64 gcc

i want science experiment rq

[ocean ore]

it is time

i must write that STUPID ASSEMBLY STUB

AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

i know barely anything of powerpc assembly

wish me luck

arguments are passed in registers

the first 8 are at least

so i can use these first 8 arguments to pass the page table and other evil crap

this is the only one i need to pass anyway

maybe the kernel entry address

CRAP I FORGOT ABOUT THE ENTRY ADDRESS

routine is gonna be loading the new page tables into storage register, then clear all buffers and set the registers to 0

i shouldve bothered with a stack

allocate some dedotated wham

1MB stack

[raw prairie]

Don’t you use the requests for this stuff?

So you don’t need to use arguments?

[ocean ore]

yeh

[raw prairie]

Just call the main function or jump to it?

[ocean ore]

not that simple

i need to switch from the open firmware page tables and clear the tlb crap or something

[raw prairie]

That’s normal

[ocean ore]

switch from those to the page tables i made in the bootloader

[raw prairie]

On limine your meant to make your own page tables

[ocean ore]

fair

but on limine the kernel is at least able to be booted, its different here i need to clear the idiots

[raw prairie]

True

[ocean ore]

the boot function needs arguments that are probably just a bunch of precompiled registers

im not gonna write my register builder idiot in ASSEMBLY 😭

especially on powerpc

that crap is almost foreign to me

actually crap

i have to pass 24+ registers

💀

im gonna have to powerpc assembly more than i wished to

[raw prairie]

Pass a pointer to data structures?

[ocean ore]

true

mac os 9 platinum looks like metallic greek architecture

it looks like architecture in general actually

also whoever placed the thumbsup reaction onto the kvass thread i am crashing out

[ocean ore]

500 mile struct declaration

wait why am i allowing user access

fixed

im gonna go light mode

its day today

@raw prairie im gonna go thank you for your stupid manual repository i dont have to bother digging through all of my folders to find ts 😭

[raw prairie]

:3

[ocean ore]

https://klipy.com/gifs/ultrakill-v1-18

[ocean ore]

https://tenor.com/view/shadow-wizard-money-gang-gif-4210733517086831125

[raw prairie]

https://tenor.com/view/dancing-family-guy-peter-gif-20560406

[ocean ore]

my headphones just died

i have to tolerate my really loud crappy gaming keyboard

these manuals still suck balls though

more ppc paging abuse

yall at least i dont need to write another mmu implementation in the kernel

:kekw:

code reuse

[raw prairie]

https://media.discordapp.net/attachments/766703671504797696/1198114808902451220/ezgif.com-video-to-gif_2.gif

[ocean ore]

https://klipy.com/gifs/cpu-cooler

i still havent committed yet

legendary tier reference

abandon all hope ye who enter here

[raw prairie]

here be dragons

[ocean ore]

i feel like the enter kernel routine being a descent into hell makes the most sense

im gonna add the translation for this so nobody bothers

actually honestly im gonna keep it in latin

its for the greater good of humanity

[ocean ore]

i compiled all the segment crap and now i cna enter kernel

[tropic tusk]

PPC asm is very pleasant to write

also mostly pleasant to decode in an emulator

[ocean ore]

i hope so

i never wrote it but it has a bunch of instructions

typical for RISC

[tropic tusk]

you have it backwards

RISC means it has less instructions

CISC means it has more

[ocean ore]

â

[tropic tusk]

though those are pretty pointless labels these days...

[whole heath]

This hasn't been true for a while by now

[tropic tusk]

I'm aware

[ocean ore]

risc really means is that the instructions are simpler

imo

theres more of them but theyre simpler

[tropic tusk]

no

the intention was that there are no complex instructions at all

[ocean ore]

like theres a few mov instructions instead of one where one mov can do a register-> memory, register->register and memory -> register

[whole heath]

The actual characteristics the make the distinction now are mostly things like insns with two ins and an out, and load/store being explicitly distinct from calculation instructions.

[ocean ore]

load store architectures are pretty cool

they make a bunch of sense imo

[ocean ore]

ok so i assume i should disable address translation before doing anything

i should go get the physical address of my assembly code

which the firmware is most likely willing to do that for me

MUAHAHAHAHAHHAHA

the firmware claims that my physical address is equal to the virtual one

how do i check and make sure its not BS'ing me

i could try to set a register value

that seems like a good idea

.!t qemu

[swift bison]

qemu

Run QEMU with following flags: -M accel=tcg,smm=off -d int -no-reboot -no-shutdown

[ocean ore]

ok so -d cpu is reg dump

👍

it prints a kiloton of logs

so beware

crap d cpu prints so much garbage it nearly explodes

you can do info registers in the qemu monitor

👍

what

dude

is a double word 64 bit

im using some other reference to find documentation here

"word in memory addressed by EA is loaded into the low order 32 bits of rD"

powerpc is primarily 64 bit i guess

[ocean ore]

apparently powerpc registers dont seem to have letters to them

li 16, 0xFF loads 0xFF into r16

maybe they do

but my assembler is crashing out

[tropic tusk]

yeah

• byte: 1 byte (8-bit)
• halfword: 2 bytes (16-bit)
• word: 4 bytes (32-bit)
• doubleword: 8 bytes (64-bit)

[tropic tusk]

-mregnames

then you can use li r16, 0xff

[ocean ore]

ohok

thank you frfr

[tropic tusk]

np

[ocean ore]

im trying to do li but without the argument its exploding rn

lemme try adding it

[tropic tusk]

yeah you need -mregnames to use the r prefix

[ocean ore]

IBM evil

[tropic tusk]

the official syntax doesn't actually include it

iirc that shit's a GNU extension or something

[ocean ore]

[tropic tusk]

officially li 16, 0xff is how you would write it

however, you could just only use GNU as and not care

this is what I do

[ocean ore]

gnu as not being ass for once

[tropic tusk]

because this is cancer

[ocean ore]

im worried my asm routine krilled itself

lemme try fixing it

https://klipy.com/gifs/family-guy-car-crash

EVIL li

power washer assembly would be nice if it worked

[ocean ore]

also everyone uses GNU assembler these days

or whatever evil bullcrap llvm has

[tropic tusk]

pretty sure the llvm stack can do it too

GNU compatibility is kind of a goal there

[ocean ore]

true

so everyone uses gnu assembler

idk who at ibm thought of this cancer

because the assembly is very good actually

[tropic tusk]

I mean there's whatever the hell IBM XL C uses under the hood

[ocean ore]

IBM are the same people that made addi 3, 3, 3 a valid command

(add 3 to r3 and loads to r3 i think excuse me for my french )

[tropic tusk]

yes iirc that's r3 = r3 + 3

[ocean ore]

fair enough

i like that it uses what x86 people would call intel syntax

its not pure cancer

[raw prairie]

Who ever thought this was a good idea

Genuinly

[tropic tusk]

IBM

[raw prairie]

Fuck IBM

Lowkey

[ocean ore]

Kvass (powerpc (32 bit) (currently) OS (+related crap))

not

x86-64 whenever i do it

[tough socket]

no its still true

people overdo the "cisc and risc are meaningless distinctions in the area of performance debates" and start saying "cisc and risc have NO MEANINGFUL DIFFERENCES anymore" which is obviously wrong

[ocean ore]

circus

im looking at openbsd code for power mac SMP

insanity

im not gonna bother w/ powerpc smp

maybe only on that fancy ibm emulated board

idk p series or something

i want to do this kernel on x86-64 too after all

(i renamed the thread because its not x86-64 YET)

[barren sierra]

the early ones are allegedly so simple that 2nd year university students are supposed to be able to implement them in verilog

(which is supposedly one of the homework assignments we'll get near the end of the semester)

[ocean ore]

oof

[ocean ore]

ok so time to keep working on this

powerpc assembly is nice because motorola worked on it

idk m68k assembly

but currently powerwasher asm is pretty pleasant

[ocean ore]

no comments on this 😭

also for the powerpc illiterate people, lwz loads from a memory location from a register + offset

lwz [destination], [offset]([register with pointer])

its an array

most unexpected MSR bit

this is quite nice

ae

i have a second routine happening in real mode (physical addressing)

i have to disable this crap, jump there and do a hopium

that it works

the dante's inferno quote fits

no im not gonna abandon hope

i ye entered here but im not abandoning hope

also crap how do i flip the bit off

andi wont work, that uses 16 bit integers

i have to do a lis and ori or something

[ocean ore]

guys i entered real mode

physical addressing

im gonna call it both for both the powerpc and x86 people

i have to invalidate the TLBs now

TLBs nuked

segment registers

i need to wipe like all of the registers afterwards too

[ocean ore]

im in a predicament(TM) where IBS corporation decided to enable address translation as soon as i set the MSR

which is like, fair enough but uhhhhhhh

Dude

[ocean ore]

i did a funny

on interrupt a special register stores the MSR, and another one stores the instruction pointer

in my infinite wisdom, i will simply pretend to exit an interrupt

mtspr 26, r5  # SRR0 (instruction pointer)
mtspr 27, r29 # SRR1 (MSR)

# Enter stage 2

rfi

[ocean ore]

MY TEST KERNEL KEEPS ERRORING

THE ASSEMBLER IS EXPLODING

PLEASE I BOOTED IT ALREADY STOP ERRORING

[void wharf]

😭

[ocean ore]

NO MY BOOTLOADER HEADERS ARE WRONG

AAAAAA I EVEN DID THE PAGING RIGHT

no elf parser

shut up the .GREG section does exist

what a POS

(point of sale)

[void wharf]

now I wanna work on my bl again lol

[ocean ore]

insanity

i somehow got the weirdest paging in computing (imo) better than i got my elf parser 😭

bruh string table died

THAT STUPID STRING TABLE CAUSED ME MORE PROBLEMS THAN THE REST OF THE BOOTLOADER

[ocean ore]

my thing broke idk what to d

hmmmmmmmm

use debugger

[ocean ore]

sometimes id rather just execute the framebuffer

[raw prairie]

You should use the frame buffer as the heap for a user program and watch it run

[ocean ore]

https://cdn.discordapp.com/attachments/1477747168180699284/1482604075399909427/speechmemified_Screenshot_20260314_235741_Discord.gif.gif

[tough socket]

sparcstation firmware would use the framebuffer as the stack and heap during early initialization before ram was set up

and you could see clown vomit dance on the screen for like half a second

[raw prairie]

thats pretty cool tbh

[minor prairie]

on one hand

really?

but also like

cool as fuck

[raw prairie]

no ram

you have to setup dram controller

[minor prairie]

ohhhhhhhh

[tough socket]

i think it was because the motherboard had some vram soldered into it which was guaranteed to be there

but all of the ram sticks could be removed

so it was safer to use the former

[ocean ore]

open firmware brianfart

anyways so i apparently did the right math to find the PTEG (i watched really closely over that stupid function) however i broke the part that actually fills the page

dont tell me i need even more surgical precision setting the page table entry

https://klipy.com/gifs/family-guy-car-crash

[tropic tusk]

you're supposed to fix this by setting it in SRR1 then rfiing into wherever you want to be

like clear IR and DR, set SRR1 to that, then set SRR0 to your real-mode code address, then rfi, and you are now at that address in real-mode

and ofc the opposite works as well

[ocean ore]

i didnt clear ir and dr i dont think

whatever i have another problem

also i cant find what API is apparently

the API thing in the PTE

is it just the 6 bits after the segment register or something

i think ive determined it right because qemu does get a hit but something else is definitely really wrong because qemu refuses to emulate after that one memory access

[ocean ore]

i was using a bit field for that but im reconsidering

i should try again

new struct 😭

RPN is genuinely evil

i think its the one that i did wrong

actually i dont know whats dying on me

what tf

[ocean ore]

yall my paging implementation was done cooked in the worst way

i was writing to the physical address of the page table instead of the virtual one

oops

[grim lance]

ALL YOU NEED IS MOV

[ocean ore]

i segfaulted qemu

ok so it apparently cant do a hit on the thingamabob

[grim lance]

[ocean ore]

OPEN FIRMWARE IS GENUINELY EVIL

DUDE

[void wharf]

what happened?

[ocean ore]

lemme explain

[ocean ore]

so it has virtual mapping functions

and i store my page tables at 0x10 00 00 00

they are 0x10 00 0 in physical memory

-# its easier for me to count numbers if theyre spaced sorry

anyways so a thing in there

a group idk

its supposed to be in 0x1AE3C0

they are in 0x100AE3C0 in virtual memory

so far so good

however open farts mapped them at 0x1AF3C0

ITS ONE PAGE TO THE RIGHT

WHO DOES THAT 😭

[void wharf]

why would it do that lol

[ocean ore]

it seems to round page starts UP and rounds page size DOWN 😭

[void wharf]

💀

[ocean ore]

this is utterly evil

im gonna go tell it to map -1 page to the left

sun microsystems doesnt deserve the praise 😭

maybe its a qemu thing

if its an everything thing thats good because my crappy fix works everywhere

if its on a real macintosh then im done DEAD

[void wharf]

maybe

[ocean ore]

hopium

it uses a supposedly accurate open firmware implementation

either used by sun or made by the inventor

[ocean ore]

im thinking of making a test function which tests the offset of the page map thing

somehow

idk

i have a translate function except if i had an incident with this i dont think i can trust it 😭

i told it to start one page left

time to test 😭

virtual memory works

\

physical time

https://cdn.discordapp.com/attachments/1482761186050314300/1482919695592980480/ezgif-16c0b4af495234d6.gif

i cant with ts

who made it

LMAO ITS TO THE RIGHT AGAIN

AHAHAHAHAHAHAHAHAHYAHAHHAHAHAHAHAHASGHJDGASDHJGASDGHJASDGHJASJDGHAJSGHDGHJASDGHJASHJDASGHJEDHGASD

AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

happens to the best of us

[void wharf]

[ocean ore]

did i saver

save

maybe i should just do my accesses with -0x1000 except it might break some maps

still one page right

this is gotta be some sisyphean punishment or something

please speedi need this

A

DUDE

who made this

:(

ive made it worse

[void wharf]

oof

[ocean ore]

qemu: it's wrong, now cope

im thinking of just telling the mapper to subtract the pointer by a page

[ocean ore]

tomorrow im gonna go keep meatgrinding the stupid mmu crap

https://klipy.com/gifs/family-guy-car-crash

i do be wonder(TM) if my binary is loaded wrong too

i mean its loaded

its just that map sucks

[raw prairie]

What happens on giving it perfectly aligned addresses

[raw prairie]

Talk is cheap map it yourself

[ocean ore]

that

it maps it one page to the left

[ocean ore]

VRO

[ocean ore]

today im gonna torture open farts

[void wharf]

[ocean ore]

even though i dont want to my mapper does have support for having multiple mmu's

[ocean ore]

idek how to fix that mapping issue

[void wharf]

sadge

[ocean ore]

it breaks

idk maybe it will work now (hopium)

is there any way to detect QEMU

[ocean ore]

hm

how about a huge warning

the jank fixed the problem

why would you map anything at 0 anyway

actually no wait

some hash crap can randomly explode

i cant fix the problem anyway

if your kernel dies dont hold me accountable

wait crap i forgot to address the Innacuracy(TM) for the binary being loaded

because screw you that might be broken too

THATS ABSOLUTELY DONE FOR

OH No

OHIOWEFWKJLEFJKLWEJKLRFEWJKLFJKLWEFJKL

qemu's "100% accurate open firmware implementation" 💔

comply harder idiot

anyways i have to probably use map-in instead of map

map-in chooses the virtual address for me though

i cant anymore

[ocean ore]

they better send those patches to me

[ocean ore]

who in their right mind broke the translator THIS badly

[void wharf]

[ocean ore]

if map-in is just as cooked id rather just make my MMU implementation map for the firmware

point of sale (POS) kiosk

yo so like map-in doesnt even exist

they ;oed

lied

what does mac os x do

what mac os does is it maps address virt to virt????

so what?? map physical address to the virtual one

[ocean ore]

ok so since i need this to run on QEMU im gonna actually just do the penultimate jank and rob OFW of its mmu crap

or not

i genuinely dont know

idiot broke

:(

for some reason the LENGTH broke the translator

💀

ok what though

i swear if those arguments are in reverse

THE ARGUMENTS ARE IN REVERSE

DUDEEEEEEEEEEEEEEEEEEEEEEEE

[grim lance]

me when stack:

[ocean ore]

shouldve been a red flag when i found out open firmware works on FORTH

you dont translate to 1 you jank implementation

💀

i suck at programming

LMAO

IM TRANSLATING EVERYTHING TO 1

rpn stands for "real page number"

yp

yo guys

i booted the kernel

@grim lance do you want an OS that sets a register to 0x4567

[grim lance]

sure

[ocean ore]

ok nah

im gonna go make it write to framebuffer

[ocean ore]

also when i make it do framebuffer theres gonna be a thnig

macs run on 256 color by default

possibly influenced by some idiot at sun microsystems

so i have to make a palette for 256 colors

[grim lance]

just do standard VGA palette

[ocean ore]

bruhb

i wanna do RGB 3-3-2

standard vga palette sucks

[grim lance]

i think std vga is pretty good

it provides a wide range of shades n shit

[ocean ore]

lemme check what it actually is

[grim lance]

https://www.fountainware.com/EXPL/vga_color_palettes.htm

[ocean ore]

i kinda forgot but i didnt like it (since it didnt work in my case 😭)

i mean thats ok colors

[grim lance]

it’s RGB 5-6-5

[ocean ore]

5-6-5 is 16 bit

[grim lance]

but it’s 8 bit gfx

[ocean ore]

whut

[grim lance]

oh no sorry

[ocean ore]

[grim lance]

i was reading the wrong section

am retarded

[ocean ore]

anyways so i can do a palette of 256 colors and the individual colors can be 24 bit

like the palette is an array of 256 24 bit colors

[grim lance]

so 256 RGB colours

[ocean ore]

yehs

idk i want to make a palette thats easy for software to translate to from like 32 bit colors or smth

3-3-2 seems reasonable imo

[grim lance]

isn’t 32bit just RGB with an alpha channel

[ocean ore]

yes

still tho :trL:

what if i just pull of a NeXT and have it go grayscale

[grim lance]

better idea
2-2-2-2
rgba

[ocean ore]

actually grayscale sucks

hm

what if the client program can choose

i should go check if the fart buffer even works

framebuffer no work

https://klipy.com/gifs/family-guy-car-crash

did i not map it properly

[ocean ore]

so my MMU implementation died, again

maybe its an open fartware thing

however the framebuffer address is physical

at least i know that

genius idea: store page tables in the framebuffer

[ocean ore]

its not working for no reason, literally

this is evil

any vmem access i tell qemu to do it explodes

[ocean ore]

idk why its dying

im gonna go rewrite pteg finder

[grim lance]

just make it not die

[ocean ore]

it dies for no reason

anyways i rewrote my PTEG generator 9000

this should be it

nevermind this is not it

[ocean ore]

i have no idea why this broke

im getting a stroke from ts

https://tenor.com/view/skeleton-gif-26826812

[gloomy mist]

https://tenor.com/view/skeleton-gif-2813086212540319582

[ocean ore]

GUYS I WROTE A SINGLE PIXEL

[gloomy mist]

nice,now you gotta draw lines, triangles and boxes 😄

[ocean ore]

retro rocket moment

3d rendering on powerpc

[gloomy mist]

don't you need to be able to draw lines and boxes for a window system?

[raw prairie]

you use somthing called x11

[void wharf]

Whaaaat? Pfft, why would you do that?

[raw prairie]

to not have a kernel composetor

:p

speechbubble

[ocean ore]

ok so while i didnt type here, @raw prairie gave me this LSD trip (and/or) earthbound background for a demo to run in my test kernel :trel:

have QEMU mmu spam for proof

im gonna now have to add 3-3-2 8-bit RGB support to have it run on real macs, since they use the mode

however the problem is that i need a color palette

and so i need a generator

which i will make

[muted talon]

hopium overdose on the left

[ocean ore]

kvass summarized in one image

[astral pagoda]

JOEBIDEN's PC

[ocean ore]

ok so im adding palette support for 8 bit color, currently i have 3-3-2 RGB and grayscale

you can make your own custom palette for your OS if you choose to

except you have to use it the entire time until you restart

unless i make a thing where you can re-enter the bootloader

wait that sounds useful actually

idk you can call for a different palette somehow ig

weird demo

something broke

😭 this color is so inaccurate

oh

the white is a color which id like to associate with a certain substance

but cant

anyway

im thinking of making a palette which is essentially HSV but mildly evil

[ocean ore]

its slightly better now

[ocean ore]

so im gonna now add monochrome tints

awesome™

dont you want a [checks notes] DEC VT220 larp?

also theres straight up a palette request

in the framebuffer req you can ask it for a preferred palette, and then theres another palette request that has options for various palettes

if you choose a custom palette you have to set that palette in the palette req

if you choose monochrome you can pick a tint,

if you choose RGB 3-3-2 you can actually modify the brightness

since ive noticed the default brightness may suck balls

(i suggest you increase it by 0x10)

[ocean ore]

i cant with this

😭

mintsuki conspiracy theory

going nowhere

[grim lance]

copies are monochrome...

[ocean ore]

no i dont want you involved in the mintsuki conspiracy theory

its only for the elites

[ocean ore]

copies are poopoochrome

[gloomy mist]

copies are poopoopoo

[ocean ore]

ok so after i run my test kernel on real hw im gonna really start working on kvass

im evil im declaring a struct inside a function

[ocean ore]

im reworking bootloader my binary doesnt want to be loaded anymore

[void wharf]

oof

[ocean ore]

its just the request crap

at first i pulled a limine with the request having a pointer to the response, then apparently that might just fail badly so instead im just gonna have the response be in the request

doesnt limine actually store a struct instead of a pointer

no it stores a pointer

https://cdn.discordapp.com/attachments/1423054245430694053/1423055104952504450/cat_bomb.gif

[ocean ore]

why are there two sizews

lemme redo

bettah

[ocean ore]

ok so i cant just have a struct in a struct named i

the struct is global

so i have to call it headerI or smth

greg_headerI

[astral pagoda]

use

s

greg_headerS

[ocean ore]

yo

[ocean ore]

wait @grim lance

run this

im gonna upload source code for this first

[ocean ore]

tomorrow im not gonna deal with this crap today

[grim lance]

send me an ISO

[ocean ore]

dude

also no ISO you dont need one, you're getting a stuffit archive or something

[grim lance]

whyyy

iso is more convenient to burn to cd

[ocean ore]

no you cant just hold down C

the boot process is gonna be brutally inconvenient

[grim lance]

what

[ocean ore]

your disc wont really be bootable

you need to open firmware console

[grim lance]

ah

[ocean ore]

idk i guess you can make an iso

i do have one

im going to sleep though ima just do it tmrw

ok so my plan is to add

• modules
• memory map
  to the bootloader (currently)

i feel like boot args are a little dumb rn

maybe later

im gonna reuse the same broken config parser from borscht to specify what modules etc

[ocean ore]

also ATI modesetting, for 32 bit color on most macs

not all sadly

im thinking of the only argument that you really need to specify for gregloader being the config file you wanna use

i dont want to have a menu like in grub or smth

cba

[grim lance]

xlatb

[ocean ore]

ok so im gonna go upload my test stuff, commit bootloader, then i work on both the kernel and the bootloader concurrently from now on because they depend on each other

im writing the docs in like 59000 years

[ocean ore]

https://codeberg.org/kvass/GREGloader/
https://git.evalyngoemer.com/kvass/GREGloader

https://codeberg.org/jastahooman/greg-test-kernel
https://git.evalyngoemer.com/jastahooman/greg-test-kernel/

i have to maintain repos on two servers because i have both trust issues and dont want to make anyone depressed 😭

@grim lance yo greg-test-kernel has iso image for macs

should work

you can burn it to a cd but you still have to figure out the open fartware console crap

[gloomy mist]

https://tenor.com/view/three-uk-greggs-real5g-5g-vegan-gif-16421043

[ocean ore]

GREGGS

https://cdn.discordapp.com/attachments/1477750428165869689/1483559520616583320/COPIES.gif

[gloomy mist]

https://tenor.com/view/conspiracy-charlie-day-crazy-always-sunny-in-philadelphia-qanon-gif-23738584

[ocean ore]

the picture being in monochrome implies it being a copy

[ocean ore]

gnu's involvement in the new world order

on wikipedia, the free encyclopedia

at en.wikipedia.org

[frigid basin]

im pissed, what should I do

[ocean ore]

run trippy powerpc kernel on qemu

im gonna go play tf2

shoot people as fat russian man with spinny expensive gun

then become invulnerable by german psychotic doctor with dumb inventions

then shoot more people with expensive gun

im gonna go bill the red team the prices for my bullets so theyll go bankrupt afterwards

peak video game indeed

[grim lance]

sprigglediggle

[ocean ore]

since you people hate hash table paging so much, im gonna use a radix tree for literally everything in my os

first of all, device management

[grim lance]

hashtables kinda goated

[raw prairie]

Radix trees are not bad for a lot of things tbh

Like in memory block devices

[ocean ore]

true

[ocean ore]

i have radix crap for everything

and now time to implement it

[whole heath]

Radix trees are cool

I will now make a Radix tree impl because I want to and that's the only reason.

[raw prairie]

i need to make a generic radix tree at some point too

[ocean ore]

my scheduler is gonna work on radix trees

my vfs is gonna work on radix trees ||NOT||

[raw prairie]

just use a circular linked list

[ocean ore]

nah

[raw prairie]

😭

[ocean ore]

its some weirdly intricate system of device management and hopium

[ocean ore]

ehhhhh

its simpler

[raw prairie]

fym?

[ocean ore]

you allocate one page worth of tabes

tables

[raw prairie]

a circular linked list is way simpler

[ocean ore]

you need more entries? allocate another page

[ocean ore]

im worried my brain works backwards

is it the one with like

a pointer for next entry and prev. entry??

[raw prairie]

heck the thread object that you schedule with

can have the pointers

so there is no extra allocations

[raw prairie]

circular only needs next

[ocean ore]

oh

[raw prairie]

and you just loop though it

its perfect for round ronin

as it gets implemented for free

[ocean ore]

i guess

how am i supposed to implement priorities

[raw prairie]

many linked lists

[ocean ore]

what

[raw prairie]

just

have one for each prioirty

[ocean ore]

oh

[raw prairie]

like have a list of sleeping tasks

a list of important tasks

and you can have a task that its job is to wakeup sleeping tasks in the normal qeue

piroity could be for drivers and stuff

[ocean ore]

fair

[raw prairie]

if prioirty isnt empty go there until they are all blocked or sleeping

[ocean ore]

what if you just have a timer and every time a process is ran you just reset it to a higher value than the lower priority tasks

[raw prairie]

well a timer wouldnt run as a thread context

it would be an interupt context

but like your network driver may be under a thread

or usb

[ocean ore]

ig

idek

ive never gotten to writing a real os before this crap, i only know somewhat basic crap like virtual memory

the algorithm insanity is uhhh, insanity

i feel like just making an order stack and every time it goes empty go through the proces lists and fill it up again

[ocean ore]

https://tenor.com/view/trevor-gta-v-gta-5-ending-burn-gif-5319649801082575730

so i didnt work on this

RIP

ima try locking in tomorrow and getting a terminal emulator

[raw prairie]

Flanterm

https://tenor.com/view/family-guy-joe-joe-taken-away-gif-17520860855595872089

[tropic tusk]

I wouldn't be shocked if flanterm doesn't work on ppc

[minor prairie]

be or le?

because if it's le it should be fine

[tropic tusk]

BE of course

nothing older than POWER8 runs in LE by default

and LE mode in those older CPUs is kinda a hack

[minor prairie]

ah

[tropic tusk]

and none of the firmware or hardware expects you to use it

[minor prairie]

just try it ig

[tropic tusk]

it's not my OS lol, I was just commenting on the matter

[minor prairie]

oh 🥀

[raw prairie]

It’s worth a try

[barren sierra]

why wouldn't it work

and also even if the default framebuffer backend doesn't work, write your own that does support BE

[tropic tusk]

endianness problems, also iirc (but I could be wrong about this, haven't looked at it in ages) it doesn't support anything other than 32-bit color?

[barren sierra]

yeah it doesn't support anything but 32bpp color, which is why i had to copy the flanterm backend and modify it

but i dont see it assuming LE anywhere

endianness issues kind of only arise when you convert between data types by bypassing C's type system, or I/O with external data

[ocean ore]

the mac framebuffer seems to be little endian

[ocean ore]

ok thats a big problemo™

[frigid basin]

what happened to x86-64 in the thread title

[ocean ore]

i need it to support grayscale, 8-bit, and 16 bit colors too

especially grayscale and 8 bit

[ocean ore]

take a wild guess

[frigid basin]

surely u didn't give up :D

or did u

[ocean ore]

no its called a "delay"

https://klipy.com/gifs/lol-thrown

[ocean ore]

the motorola manual calls it "optional"

qemu doesnt emulate it im pretty sure 😭

[barren sierra]

just copy my thing and add support for 1-bit and 8-bit color

[ocean ore]

1bit

nah i have 8 bit monochrome

also idk if i should really use flanterm

i mean it sounds like it would work but like

[barren sierra]

It's a full ansi terminal implementation!

Also flanterm can be made to work with other backends too

You can write a hardware accelerated renderer for it if you want

Or a VGA backend

[ocean ore]

truetrue

ehhh fine ima bite the bullet and use the idiot

little endian (surprisingly) framebuffer of doom

[ocean ore]

also that sounds difficult

from my understanding that would be like, loading textures and then telling the gpu to place them somewhere

[ocean ore]

i genuinely expected the byte order to be difficult however the framebuffer does seem to be LE

[barren sierra]

Userspace makes this piss-easy

Flanterm isn't just for kernel mode

[ocean ore]

true

idk i just have some concerns over some stuff like the init function being 50 miles long

its more of a mild inconvenience

[ocean ore]

im gonna go make a font format

or just use psf or something

[ocean ore]

im thinking of using this font for kvass

IBM please dont sue me

i found it in here https://github.com/viler-int10h/vga-text-mode-fonts

PC-IBM/PS2THIN4.F16

PS2THIN2 is also good

actually THIN4 is better

ima use PS2THIN4

[ocean ore]

gregloader is getting memory maps and page table info requests

i need those

(who doesn't)

obv on the first one, but i need the second one since powerpc page tables dont work like they do on x86 and since it is my bootloader i know how it works so im just gonna use the bootloader page tables

i see no reason why it would explode like it supposedly does on x86

also not reusing them would mean wasting TONS of ram

i want to reuse them for some reason

practically the bootloader only needs to share the crap used for picking hash table entries, htabmask, and the virtual address of the tables

how am i gonna map them without knowing anything

the request has a "map page tables where" thing too

if i ever port this bootloader to x86, it will not have crap like this

since x86 probably does not do this kind of crap

i should honestly just do one architecture specific request or something

instead of paging

[ocean ore]

DUDE

ITS MARCH

PLEASE

ITS MARCH

https://tenor.com/view/trevor-gta-v-gta-5-ending-burn-gif-5319649801082575730

i have my window opened im currently being fried

also im thinking of adding a greg_arch request instead of paging or whatever

since i need to give the kernel a bunch of other crap too

mmio locations for PCI configuration space crap, for example

[ocean ore]

im crine theres no leaves on some trees yet

im getting fried before the trees have leaves

😭

[tropic tusk]

that's literally 89f what do you mean 😭

that's not even that hot 😭

it hits like 110f (43c) over here frequently

[barren sierra]

32C already?

where the fuck are you

I barely have 13 here and I'm in like the middle of the northern hemisphere (around the 45th parallel)

[ocean ore]

murica 😭

currently

im not gonna respond correctly to sane weather when i go back to europe

[ocean ore]

yeah true

i remember when we got like 124c in may at some point and so the school bus had like literal ice cold bottles of water

😭

(they were all late)

[tropic tusk]

it's currently 40C right now over here in Phoenix, AZ, US

[ocean ore]

AZ

arizona moment

anyways so i somehow have to go and give my kernel mmu crap

[raw prairie]

It’s 70f in Florida rn

[ocean ore]

in sane measurements

[raw prairie]

70f=21.111 °C

[ocean ore]

cold

room temperature or something

[raw prairie]

Dawg that’s room temp

[tropic tusk]

hell nah

[ocean ore]

24 is room temperature imo

[tropic tusk]

room temp is like 80f (26c) - 84f (28c)

70f is chilly

[ocean ore]

mildly hot

[ocean ore]

true

im gonna go pass the kernel this absolute struct of all time

you get to ask the bootloader to map the page tables btw

i might use this same request thing for mapping the interrupts somewhere

[raw prairie]

The kernel should do interupts its self

Right?

[ocean ore]

well yes

[raw prairie]

Let me guess

[ocean ore]

but the interrupt vectors are at 0 physical

[raw prairie]

There is some power PC bullshit

[ocean ore]

im not sure if this is correct but yes i guess

[ocean ore]

so id just add a request thing to map them

yall openpic is gonna be genuinely brutal

[raw prairie]

Or give a generic HHDM

Of like 256mb

[ocean ore]

nah

[ocean ore]

or MPIC

https://en.wikipedia.org/wiki/OpenPIC_and_MPIC

its an apic ripoff

its probably a multiprocessor thing

i guess its used for external device io too

IBM used a MPIC based on OpenPIC 1.0 in their RS/6000 F50 and one based on OpenPIC 1.2 in their RS/6000 S70. Both of these systems also used a dual 8259 on their PCI-ISA bridges.
POWER machines with the original intel pic 😭

i mean its not the primary one but its still funny

https://wiki.osdev.org/Open_Programmable_Interrupt_Controller

Limited information on the OPIC can be found on the indexed Internet.

DUDE

omw to implement the most braindead obscure devices on planet earth

i mean thats the openpic

ibm has mpic based on it

[raw prairie]

https://kib.kiev.ua/x86docs/AMD/MISC/19725c_opic_spec_1.2_oct95.pdf

found the spec

[ocean ore]

osdev wiki skill issue]

i found the MPIC one

its more relevant because it mentions powerpc a few times

ok so ive noticed interrupts arent that important

we polling ps/2 with this one 🔥🔥🔥

ADB seems to be made to not use interrupts

[raw prairie]

Nooooo

Interrupts are very important

Esp for timers

[ocean ore]

powerpc has a timer interrupt

im pretty sure i know how to set up that one

or at least its documented

[raw prairie]

Yeah but you also need keyboard interupts

[ocean ore]

doubt

[raw prairie]

You will burn the CPU

[ocean ore]

MMIO of doom and evil

[raw prairie]

[ocean ore]

https://en.wikipedia.org/wiki/Apple_Desktop_Bus

if the mouse is known to be at address $D, the computer will periodically send out a 1-byte message on the bus

To a mouse this means "tell me the latest position changes"

we have to poll EVIL PS/2 with this one 🔥 🔥

[safe silo]

DUDE ITS LIKE SNOWING HERE ITS LIKE FUCKING MARCH

FFS

[ocean ore]

imbalance of weather in various parts of the world

linux sources are unreadable

[ocean ore]

requests(TM)

ignore the broken-ish palette

2.5 gib of userspace

i reserve too much space for nothing

i should place the page tables right after the stack

[tropic tusk]

why do you need 256MB of framebuffer

[ocean ore]

uhh idk big displays ig??

/gen

im worrying over nothing but idk

[tropic tusk]

1920x1080 @ 32bpp is still only 8MB 😭

[ocean ore]

oh 😭

very big display

novidia rtx 8090

🔥

[tropic tusk]

and no PPC Mac would ever even be driving a display that large at that color depth anyways

[ocean ore]

true

[tropic tusk]

most of their GPUs don't even have that much VRAM in the first place

[ocean ore]

also probably powermac g5s could

you can upgrade the GPU

stock probably also can but idk

not sure

[tropic tusk]

not if you're relying on OF to do anything

OF only supports specific models of GPUs with specific PCI ROMs

[ocean ore]

well im not after the bootloader so ehhhhhhh

[ocean ore]

true

oh right crap

OF supports only some gpus

[tropic tusk]

so if you replace the GPU, OF just won't give you a framebuffer

[ocean ore]

true true

after you set up framebuffer?

but anyway still tho

ima go rearrange it so i wont waste so much ram

virtual address space

whatever

[tropic tusk]

even 4K @ 32bpp is still only like 32MB 😭

[ocean ore]

64bpp

64bpp seems stupid

we see images on 32 bpp fine already

[tropic tusk]

yeah

[ocean ore]

isnt HDR something like more bpp

not exactly but idk

HDR is some fancy crap nobody ever has

[tropic tusk]

yeah iirc it's like 10bpc / 40 (?) bpp

[ocean ore]

uhhhh

alpha channel ig

[tropic tusk]

idk if they drop the padding in 10bpc so it still fits in 4B

idk I'm not a big display nerd

all of my framebuffers are 16/32bpp and relatively low res

720x448 @ 16bpp for the win

[ocean ore]

my of default fb is 1024x768 (varies on mac model, i have an ibook) with 8 bit color (mandatory)

you can set a palette

i made an rgb 3-3-2 generator which made the white a bright yellow (not sure if thats a good thing 😭)

ATI cards have some modeset trickery which allows you to have 32 bpp color

but i think thats ATI card only

qemu allows you to have 32 bit color

[tropic tusk]

Radeon cards are really easy to mess with the framebuffer on yeah

their registers are very very well documented

[ocean ore]

idk ive not looked yet

but it does mess with the registers

[tropic tusk]

I do that on the Wii U and Xbox 360

[ocean ore]

powerpc gaming console programmer experience vs powermac programmer experience

[tropic tusk]

[ocean ore]

its gotta converge somewhere tho

page tables

[tropic tusk]

nah, we all just the BATs

[ocean ore]

breh

i use the page tables

i need those anyway

its not exactly a computer

i only have 4 of them (homebrewers these days with their 8 bats)

[tropic tusk]

yeah they're pretty necessary for doing a proper OS

[ocean ore]

true

mario kart is an operating system /hj

[tropic tusk]

thankfully I don't do much of that, bootloaders and other such low-level code ftw

[ocean ore]

i have good mmu code

i can map crap