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Virgil Dupras 2019-04-16 10:49:09 -04:00
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@ -78,24 +78,21 @@ enough to steadily improve your technological situation, build more
sophisticated machines from more sophisticated scavenged parts and, who knows, sophisticated machines from more sophisticated scavenged parts and, who knows,
in a couple of decades, build a new IC fab (or bring an old one back to life). in a couple of decades, build a new IC fab (or bring an old one back to life).
## Futile? ## Status
For now, this is nothing more than an idea, and a fragile one. This project is The project is progressing well and I already have a working shell (see `doc`
only relevant if the collapse is of a specific magnitude. A weak-enough to see what it can do) on a classic RC2014. Highlights:
collapse and it's useless (just a few fabs that close down, a few wars here and
there, hunger, disease, but people are nevertheless able to maintain current
technology levels). A big enough collapse and it's even more useless (who needs
microcontrollers when you're running away from cannibals).
But if the collapse magnitude is right, then this project will change the * Extremely flexible: this is not an OS, but a meta OS. You build your own OS
course of our history, which makes it worth trying. through glue code.
* 1K binary (but size vary wildly depending on what parts you include. 1K is for
This idea is also fragile because it might not be feasible. It's also difficult a shell using all parts)
to predict post-collapse conditions, so the "self-contained" part might fail * Built with minimal tooling: only [scas][scas] is needed
and prove useless to many post-collapse communities. * Can read and write to memory through shell
* Can run arbitrary routine from arbitrary address with arbitrary arguments
But nevertheless, this idea seems too powerful to not try it. And even if it from shell.
proves futile, it sounds like a lot of fun to try. * Can "upload" code from serial link into memory and execute it.
* Can manage multiple "block devices"
## Organisation of this repository ## Organisation of this repository
@ -110,11 +107,8 @@ Each folder has a README with more details.
## Roadmap ## Roadmap
The project is progressing well and I already have a working shell (see `doc` Such a vast project involves quite a lot of fiddling and I can't really have a
to see what it can do) on a classic RC2014. precise roadmap, only a general direction:
However, such a vast project involves quite a lot of fiddling and I can't really
have a precise roadmap, only a general direction:
The primary target for Collapse OS is the z80 architecture. There's a good The primary target for Collapse OS is the z80 architecture. There's a good
amount of great z80-related hacks all around the internet, and the z80 CPU is amount of great z80-related hacks all around the internet, and the z80 CPU is
@ -143,7 +137,28 @@ have complete "post-collapse" recipes, we can call it a win.
If you're interested in being part of this project, I have no idea how to If you're interested in being part of this project, I have no idea how to
include you, but please, let me know, we'll manage something. include you, but please, let me know, we'll manage something.
## 32-bit? 16-bit? ## Open questions
### Futile?
For now, this is nothing more than an idea, and a fragile one. This project is
only relevant if the collapse is of a specific magnitude. A weak-enough
collapse and it's useless (just a few fabs that close down, a few wars here and
there, hunger, disease, but people are nevertheless able to maintain current
technology levels). A big enough collapse and it's even more useless (who needs
microcontrollers when you're running away from cannibals).
But if the collapse magnitude is right, then this project will change the
course of our history, which makes it worth trying.
This idea is also fragile because it might not be feasible. It's also difficult
to predict post-collapse conditions, so the "self-contained" part might fail
and prove useless to many post-collapse communities.
But nevertheless, this idea seems too powerful to not try it. And even if it
proves futile, it sounds like a lot of fun to try.
### 32-bit? 16-bit?
Why go as far as 8-bit machines? There are some 32-bit ARM chips around that Why go as far as 8-bit machines? There are some 32-bit ARM chips around that
are protoboard-friendly. are protoboard-friendly.
@ -160,7 +175,7 @@ programming an ARM or RISC-V chip.
That being said, the MSP430 seems like a really nice and widely used chip... That being said, the MSP430 seems like a really nice and widely used chip...
## Prior art ### Prior art
I've spent some time doing software archeology and see if something that was I've spent some time doing software archeology and see if something that was
already made could be used. There are some really nice and well-made programs already made could be used. There are some really nice and well-made programs
@ -179,7 +194,7 @@ source.
Nah, maybe I'm working needlessly, but I'll start from scratch. But if someone Nah, maybe I'm working needlessly, but I'll start from scratch. But if someone
has a hint about useful prior art, please let me know. has a hint about useful prior art, please let me know.
## Risking ridicule ### Risking ridicule
Why publish this hazy roadmap now and risk ridicule? Because I'm confident Why publish this hazy roadmap now and risk ridicule? Because I'm confident
enough that I want to pour significant efforts into this in the next few years enough that I want to pour significant efforts into this in the next few years
@ -192,3 +207,4 @@ sound more or less crazy to you than what you've been reading in this text so
far?), I will probably need help to pull this off. far?), I will probably need help to pull this off.
[searle]: http://searle.hostei.com/grant/z80/SimpleZ80.html [searle]: http://searle.hostei.com/grant/z80/SimpleZ80.html
[scas]: https://github.com/KnightOS/scas

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@ -49,4 +49,5 @@ addresses are known at compile time and thus can be consts (maybe at the cost
of an extra pass though)). I went for macros instead, but that doesn't mean of an extra pass though)). I went for macros instead, but that doesn't mean
that the z80 assembler will need to support macros. It just need to support that the z80 assembler will need to support macros. It just need to support
labels-as-consts. labels-as-consts.
[scas]: https://github.com/KnightOS/scas [scas]: https://github.com/KnightOS/scas