EEHEEHEE lotta good work on this today, I'm trying to build it up to the point of execing an /etc/init that reads a file to a lil hello world!!
acourse't I'm still in the weeds on all the stack swapping multiprocessing low level muck, arghh hate this parta this kinda stuff -- but i've gotten SO FAR hehehe gonna head back to it tomorry
(I'm now on the init branch if y'all wanna check progress on the codeberg >:3)
trying to be on here more often (again lol)
Back on my BS with my project to make a portable version of Unix V6 (from 1975) with a self-hosted pre-K&R C compiler, that could be released on anything that can at least simulate the memory model
Gonna start on a custom VM written in #Rust, but then port to the #C64 and probably also #ALtair8800!!
You can check out the progress on the kernel branch here: https://codeberg.org/popeyeotaku/popix/src/branch/kernel
Right now the compiler's almost done, with a bootstrapper compiler written in Rust. I'm about to start booting and bugfixing the kernel as soon as I extend the VM a tad
Still gotta gut the kernel by another several K, and write self-hosted assembler/linker package, and port userland. Also gonna write a custom YACC that uses less RAM
but it's coming along swimmingly!!!
PFFFFT it turns out me #AncientUnix #Popix bug was caused on accouna me #AncientC #C6T compiler didn't handle multi-dim arrays correck 🙃 thas all fix't now tho 💪💪
here's hopin for the next bug to be nicer as I recompile
The #C6T #AncientC compiler has a dirt simple backend which't shud be pretty easy to port to a buncha CPU's, perfornanss aside
An' the #Popix #AncientUnix kernel has v lil in the way of system dependint routines -- the biggesk hurdle is figgerin up how yer gonna handle the stack whin getting into an out of the kernel. Once't thas finich't, they's jus' a baker's dozing small utiliky routines, an yer I/O drivers -- an yer set!!
well the last few days may have been hell, BUT i distracktid meself by working on me #AncientUnix #Popix #AncientC #C6T projecks!!!
For those who don't know, I'm porting Unix V6 from 1975 to 8-bit platforms like the C64 and Altair 8800.
To do thisk, I wrote a self-hosting 8-bit compiler for the pre-K&R version of C that Unix6 uses.
Thas actually finiched! An I puts together most of the kernel, and hav it testable on the Altair... but acourse't debugging it is a ***** and a half, so to heck wit it
The past couple days, I work't up a modern VM made espeshially for the C6T language, and just now got most of *its* kernel together.
Tomorry I'm gonner put together the last bits on the VM to interack wit the hosk environmink, get a tesk user program, an try bootin up the kernel!!
(the igea being the modern VM will be a *lot* easier to debug the kernel on hehe)
for those who yaint awares, I'm porting #ancientUnix Sixth Edition from '75, using a new pre-K&R #c6t #ancientC compiler I've written that's designed to be easy to port around to different platforms (especially 8 and 16bit ones)
It's *almost* running on the #altair8800 right now (it gets fairly far into the boot process before hanging), then I'm gonna work up a #commodore64 port
#C6T also has a self-hosted assembler/linker packidge, wit the assembler being made easy to modify for a new CPU platform
Affer #C64 an #Altair8800 ports of #Popix, i think a xt-class #dos port wud be pretty simple - #Popix can work wit blocking device drivers, so you cud jus use the BIOS, an for starters you cud re-use the Altair's 8080/Z80 backend, wit a cheap program to convert it to 8086
but i cud easily see stuff like #WASM getting a port as well, I'm really excittid for the possibilikies!
#AncientUnix #Popix thisk is a projeck to hav a portable, cut-down version of the 1975 Unix V6, designed to run in a flat address space w/o a MMU, an possibly witout a hard drive - wit two particlar systems to start on being the #Altair8800 and the #C64
unlike most Unix V6 reimplementashings, like xv6, #Popix has a new portable #AncientC compiler call't #C6T, which't is *self hosting*, allowing for developmink on #Popix itself
to me, that wud be the whole point of wantink a unix kinda system, they's a nice dev platform (esp. whin you don't hav dynamick linking, etc etc, issues like nowadays)
for the evening crowd, i updaked me #AncientUnix #Popix #AncientC #C6T compiler an better documinked the IR! :3
also gonna start hash'ttagging me posts on thisk projeck
