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flat assembler > OS Construction > Can an OS be totally written in the BIOS?

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l4m2



Joined: 15 Jan 2015
Posts: 616
If so, any standard can be changed?


Last edited by l4m2 on 17 Jul 2018, 02:57; edited 1 time in total
Post 15 Jul 2018, 13:08
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 16106
Location: Squiddler's Patch
l4m2 wrote:
Yes. Install DOS, it was 100% BIOS.
Post 16 Jul 2018, 00:21
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l4m2



Joined: 15 Jan 2015
Posts: 616
Isn't DOS in floppy disk?
Post 16 Jul 2018, 11:39
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Ali.A



Joined: 08 Jan 2018
Posts: 130
well, yeah its.
Post 16 Jul 2018, 12:28
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DimonSoft



Joined: 03 Mar 2010
Posts: 444
Location: Belarus
If you mean avoiding OS as a separate piece of software then yes, it would definitely be possible but wouldn’t make much sense, I guess, since such a biOS would be the only choice for the customer. It would be “hardcoded” into your hardware and to replace/update it you would have to go flashing BIOS which is a very special operation.
Post 16 Jul 2018, 19:15
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 16106
Location: Squiddler's Patch
l4m2 wrote:
Isn't DOS in floppy disk?
The media is not important. It can also run from USB memory sticks. The BIOS emulates all the stuff for DOS.
Post 16 Jul 2018, 21:46
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rugxulo



Joined: 09 Aug 2005
Posts: 2311
Location: Usono (aka, USA)
BIOS and CSM compatibility will be dropped by 2020, according to Intel. It will then be UEFI only, and I somewhat doubt that most people are interested in creating some kind of shim to run such old legacy (sadly). So you're stuck to VMs for things like that. In the old days, DOS was installed in ROM on various machines.

P.S. I often run FreeDOS natively on my (2010 and 2011) machines (still having BIOS and no UEFI), and they don't have floppy drives at all (in case that wasn't obvious). In fact, the diagnostics partition of my Dell laptop uses DRMK, aka (barely-modified) DR-DOS.
Post 11 Aug 2018, 22:57
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DimonSoft



Joined: 03 Mar 2010
Posts: 444
Location: Belarus
rugxulo wrote:
BIOS and CSM compatibility will be dropped by 2020, according to Intel. It will then be UEFI only, and I somewhat doubt that most people are interested in creating some kind of shim to run such old legacy (sadly). So you're stuck to VMs for things like that. In the old days, DOS was installed in ROM on various machines.

Well, the quality of the compatibility layer would decrease anyway because of new developers not aware of all the compatibility quirks that should be preserved. But it’s definitely a bad idea to drop it while not having a good alternative. My experiments with UEFI made me believe its standard was written in half an hour and UEFI it self seems to be considered by its developers as “just some stupid stuff enough to prevent people from complaining we did nothing”. At least using UEFI on my laptop to draw a simple game desk turned out to be a nightmare and, without proper documentation on the quirks of its particular UEFI implementation, mostly failed.
Post 12 Aug 2018, 09:38
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