SS1src: Interrupt's adventure in porting the mac source

[673f255426633dertseha]

°SS1src

Forked from this post, this thread here documents the effort made by the user known as "Interrupt" on the Discord server of NDS.

Most recent .gifs:

(Always with a few hours in between, posted by the person "Interrupt")

The current topic is the conversion of the fixed-point math, which has both a lot of assembler code, as well as endianess-dependencies. This is the main problem now as it messes up physics (as seen by the captures).

Axemelon even went as far as to pastebin their port of fixed-point math:
* https://pastebin.com/8aJvnfD9
* https://pastebin.com/aVuhkc6v

[673f2554267a2dertseha]

Your friendly Discord report here:

Seems like Interrupt - the one doing this hacked port - skipped the physics part and is still making these screenshots in no clip mode. They now started to work on objects. The map notes were first indicators before getting into types.

Axemelon is following this progress and gives tips and hints here and there.

[673f255426927dertseha]

More stuff from Interrupt:

Posted with the words

Holy shit, this is coming together

At this point I'll stop posting their gifs. Unless you people want more. If that's the case, this should become its dedicated thread. (More incentive for me to get used to these mod tools here)

Also, Axemelon was asked to provide their serialization code, which they did: https://pastebin.com/TwCVcGnH

[673f255426a74icemann]

Keep the gifs coming. Even if it's in a separate thread. I'd like to know of the progress of it.

[673f2554272f3JDoran]

Keep the gifs coming. Even if it's in a separate thread. I'd like to know of the progress of it.

Agreed! It's fascinating to see the progress of this. And please keep us informed of any updates or news on Discord or related websites and blogs, it's great to have all the news and information posted in one thread.

[673f255427607dertseha]

And please keep us informed of any updates or news on Discord or related websites and blogs, it's great to have all the news and information posted in one thread.

I'll be happy to bring anything in that I come across, as hopefully anyone on this forum will probably do.
Though please understand that I'm not intending to compete with your personal news aggregator

[673f2554277b8voodoo47]

I'm not completely sure just by looking at the screenshots - seems like he is porting the original DOS game to the latest MacOS?

[673f2554278b3icemann]

It's the other way round I'm pretty sure. Then again those borders around the images are definitely Mac OS stuff. Though that may be due to what OS dertseha is using.

[673f255427b65dertseha]

It's the other way round I'm pretty sure. Then again those borders around the images are definitely Mac OS stuff. Though that may be due to what OS dertseha is using.

Citizens - this is rumor control
The gifs are all those that Interrupt posted on the Discord channel - they don't show anything I'm running (or even doing). I'm only forwarding their results. And yes, Interrupt appears to be doing this on a new mac. Yet it's less about porting to a modern mac, it's more porting it to little endian code, which happens to be a modern mac at their disposal.
(And to be clear here as well, this Interrupt is a private person doing this on their own time - not what NDS is doing. Axemelon is the one officially doing the port for NDS.)

There is at least one new picture posted, give me some time (and attempts) to split this up.

[673f255427d3ddertseha]

More from Interrupt:

Main issues right now:
- physics coordinate spaces don't seem to match, so physics is off
- not loading in scheduled actions for the map yet, so no trigger timers work
- trying to go into cyberspace crashes after the new level loads
and there are still rendering issues around rendering sprites / the hud clipping strangely

(Which Stephen commented as "This is really impressive")

[673f255427ef8Interrupt]

I also have a Twitter thread going since the beginning of this project:
https://twitter.com/cuddigan

More screenshots:

[673f255428041Gawain]

Very nice!

What's up with the sawtooth on floor and ceiling?

[673f2554282afInterrupt]

Very nice!

What's up with the sawtooth on floor and ceiling?

It's one of the many endianness problems in the code, the order it's collecting the color to draw is probably reversed. There's another similar issue in drawing the big sprites, but those are both issues I can live with for now. Been trying to get things to playable as fast as possible, and then work through the smaller issues from there.

[673f2554283abvoodoo47]

ah, nice to see you here - so, am I right thinking you are trying to get the DOS game running on the latest MacOS?

[673f25542847aicemann]

Very impressive work.

[673f2554286daInterrupt]

ah, nice to see you here - so, am I right thinking you are trying to get the DOS game running on the latest MacOS?

I'm getting the recently released Mac source code running on modern systems, like OSX, and part of that work involves switching things back to the original DOS assets.

Switching things back to the DOS assets was much easier than trying to use the Mac resource files since those have a ton of endian-ness problems that the DOS assets did not have. Started down that path initially and noped out real fast.

[673f255428802voodoo47]

interesting - and yeah, this is definitely going to be useful, as quite a few people will want to run the DOS assets, I'd imagine (the upcoming NDS release is fully based on the Mac version, if I understand correctly).

are you planning to support windows/linux as well?

[673f255428a3edertseha]

(the upcoming NDS release is fully based on the Mac version, if I understand correctly).

Axemelon wrote on Discord that they ported the Mac assets to the DOS resource format.

[673f255428b3bvoodoo47]

hmm, that probably means their binary will be capable of running the DOS assets as well.

[673f255428c27JDoran]

Welcome to the forums, Interrupt! It's fascinating seeing your work progress.

[673f255428d43dertseha]

Quite some progress (if you follow Discord/Twitter).
Pre-release for Windows published a few hours ago: https://github.com/Interrupt/systemshock/releases/
See main page for current limitations.

[673f255428e67voodoo47]

looking good, but grabbing the mouselook code would be highly advisable, no matter how vanilla is the port supposed to stay.

also, mimicking SS2's mod/fan mission loading would probably be a good idea (basically, mods and FMs are loaded separately).

[673f255428f40winterheart]

Mouselook already implemented in code (don't know it on 0.5 release or not).

[673f255429049dertseha]

The port is making its first public rounds (that crossed my Google-fed newsfeed)
https://www.gamingonlinux.com/articles/shockolate-is-a-new-cross-platform-source-port-of-system-shock-1.11962