Other multitask GUI within 1 MB system software?

[freqmax]

Is there any other operating system besides AmigaOS that handles multitasking and graphics environment within 1 MByte?, preferably free.

Thinking that 512 kB ROM + essentials on floppy < 1 MByte. Memory protection could be worthwhile too.

[glitch]

You mean on the Amiga or for other architectures?  The QNX 1.44M Web challenge always blew me away, but that is for x86 hardware.

[freqmax]

Well if the code is portable enough the choice of CPU is less critical. But one example would be a MIPS processor with 1 MByte RAM and 512 kB ROM and maybe some FPGA as graphics chip.

[desiv]

That depends also on how you define multitasking.
You could run multifinder on the Mac from floppy.
That being said, I wouldn't call a Mac with a single floppy actually useful :-) , but it could do it...

desiv

[Hattig]

You could go the other way, just for a laugh. How about SymbOS for Z80 machines such as the MSX, Amstrad CPC and Amstrad PCW? That's a GUI multitasking environment running 128KB or less.

[Linde]

Contiki used to run on a stock C64 with GUI and (cooperative?) multitasking.

[whabang]

MenuetOS/KolibriOS runs off a floppy.

I've read about people running DOS and Windows 3.1 off a floppy too, but that was using Doublespace.

[runequester]

Wasn't there a "multi TOS" option for the Atari's?

[freqmax]

Recal something like multi-TOS too ..

[Fransexy_]

MenuetOS/KolibriOS runs off a floppy.

I've read about people running DOS and Windows 3.1 off a floppy too, but that was using Doublespace.

What part of "multitasking" didn't you understand?

[commodorejohn]

What part of "multitasking" didn't you understand?

Windows 3.1 is multitasking. Not preemptive multitasking, but multitasking.

[freqmax]

cooperative multitasking.. hickuptasking

[commodorejohn]

Oh, no argument there - but strictly speaking it is multitasking.

[beakster2]

QNX on the single HD floppy as mentioned above is what first came to mind for me.  It was a candidate for the next AmigaOS at one point I remember.

Never heard of SymbOS but looks impressive.  How about Geos (8bit and 16bit)?  Or early versions of GEM Desktop (they even had that running on the BBC Micro).  Also early versions of RiscOS probably qualify.

[LoadWB]

How about Geos (8bit and 16bit)?

I'm not certain GEOS was really muti-tasking.  IRQ-driven, yes, but multi-tasking?  I'd like to see more in-depth information on that.