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flat assembler > Main > A 2GB FLAT BINARY?

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Patrick



Joined: 08 Sep 2017
Posts: 3
Well? Beyond 32,812 .COMs...

Edit: May the / an admin / mod move my post to Main? My question is not DOS-specific. Thank you.
Post 09 Sep 2017, 05:38
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 15912
Location: SDSS J140821.67+025733.2
What are you asking? Can a file be 2GB in size? Can fasm create a 2GB file? Can <OS> load a 2GB file? Someone gave you a 2GB file and you want to know what it is? Something else?
Post 09 Sep 2017, 07:31
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Patrick



Joined: 08 Sep 2017
Posts: 3
I want to run a 2GB flat binary from boot. I read that .COM has a 64KB limit. I need 2GB of memory total for my game.

I mean, my original plan was to have a 2GB .COM with all code and data.

I am trying to avoid using any headers or anything Microsoft-specific. No headers, libraries, object files, or linkers.

Game loop / logic / net-code = ASM, and somehow implementing bit arrays for assets. (Taken from 32-bit bitmaps).

It will be running at 1920*1080.

My goal is to program as low-level as possible, so that I can make a networked game that runs independent of any OS.

I'm aware I have to implement drivers, which I am A-OK with. Better than being held hostage by microsoft if and when they decide to implement a tax for using their OS =P.


Last edited by Patrick on 09 Sep 2017, 07:43; edited 1 time in total
Post 09 Sep 2017, 07:35
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 15912
Location: SDSS J140821.67+025733.2
That depends upon your bootloader and your file system. If you use FAT32 (or other FS that allows large files) and a custom bootloader that maps 2GB contiguous RAM then yes you can.
Post 09 Sep 2017, 07:39
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Patrick



Joined: 08 Sep 2017
Posts: 3
Is it necessary to use a filesystem at all?

Oh you mean the boot device.

Well, realistically, anyone running this from boot will be using a USB key.

Anyone else would be using a mounted virtual USB key in a VM.
Post 09 Sep 2017, 07:46
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 15912
Location: SDSS J140821.67+025733.2
If you decide to go completely low level then you don't need a FS. Just make a custom bootloader and hardcode the location of the 2GB data into it at compile time.
Post 09 Sep 2017, 08:00
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Furs



Joined: 04 Mar 2016
Posts: 1202
Patrick wrote:
I'm aware I have to implement drivers, which I am A-OK with. Better than being held hostage by microsoft if and when they decide to implement a tax for using their OS =P.
Just use Linux then? (just the kernel, no userland)

Of course, unless you want to do it for fun then sure, but drivers will be a major pain. Even drivers working just for your specific hardware will be painful... and that's just getting started.
Post 09 Sep 2017, 15:00
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