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SymbOS: Graphical Z80 Multitasking Operating System

symbos.de

31–40 of 103 posts

Re: SymbOS: Graphical Z80 Multitasking Operating System

#31
post #27

Why does every OS screenshot (not from a big company) always have to have a few pictures of women in it? It's ridiculously unprofessional in my book.

You would rather only have men? I’m not sure what kind of anti you are.

If you need to have pictures, take landscapes.

Re: SymbOS: Graphical Z80 Multitasking Operating System

#32
post #27

Why does every OS screenshot (not from a big company) always have to have a few pictures of women in it? It's ridiculously unprofessional in my book.

You would rather only have men? I’m not sure what kind of anti you are.

It reinforces the idea of the IT industry as a place for men, and the male gaze[0], as well as injecting sexuality into an entirely asexual domain for no reason. If we want computing to be inclusive, and I personally do, then we should make representations of computing inclusive.

That is diametrically opposed from being "anti" anything.

[0] https://en.wikipedia.org/wiki/Male_gaze

Re: SymbOS: Graphical Z80 Multitasking Operating System

#33

Earlier quoted context omitted.

I think you'll need a Z80 machine with bank switched RAM, that's how the multi-tasking side of things works.

The TI-83+ does not have bank switched RAM, but it's sister products the 83+ SE, 84+, and 84+ SE do. Regardless, you can achieve preemptive multitasking on z80 without banked RAM, you just need PIC.

> you just need PIC.

Or a relocator. This can be a bit tricky but it's been done on many architectures.

Re: SymbOS: Graphical Z80 Multitasking Operating System

#35
post #27

Earlier quoted context omitted.

You would rather only have men? I’m not sure what kind of anti you are.

It reinforces the idea of the IT industry as a place for men, and the male gaze[0], as well as injecting sexuality into an entirely asexual domain for no reason. If we want computing to be inclusive, and I personally do, then we should make representations of computing inclusive. That is diametrically opposed from being "anti" anything. [0] https://en.wikipedia.org/wiki/Male_gaze

I still don’t get it - there are pictures of men and women in that screenshot.

Re: SymbOS: Graphical Z80 Multitasking Operating System

#36
post #4

Earlier quoted context omitted.

Sadly, no. No memory protection, you see.

Back in my day, when we saw something in RAM that we liked, we just read it.

My BBC Micro (6502) even had a memory viewer in ROM that ran at ~50fps and I remember the fun looking at running timers and keyboard/joystick ports getting activated and such.

Years ago I wanted to do that on windows and found out that there was something called protected memory, now it finally looks like I can experience that fun again, although at a slower pace it seams ;-)

Re: SymbOS: Graphical Z80 Multitasking Operating System

#37
post #35

Earlier quoted context omitted.

It reinforces the idea of the IT industry as a place for men, and the male gaze[0], as well as injecting sexuality into an entirely asexual domain for no reason. If we want computing to be inclusive, and I personally do, then we should make representations of computing inclusive. That is diametrically opposed from being "anti" anything. [0] https://en.wikipedia.org/wiki/Male_gaze

I still don’t get it - there are pictures of men and women in that screenshot.

Maybe if you count the demon as male, or the tiny silhouette in the bottom right.

Re: SymbOS: Graphical Z80 Multitasking Operating System

#38
post #35

Earlier quoted context omitted.

It reinforces the idea of the IT industry as a place for men, and the male gaze[0], as well as injecting sexuality into an entirely asexual domain for no reason. If we want computing to be inclusive, and I personally do, then we should make representations of computing inclusive. That is diametrically opposed from being "anti" anything. [0] https://en.wikipedia.org/wiki/Male_gaze

I still don’t get it - there are pictures of men and women in that screenshot.

There are not. Only women, unless you're looking at a different screenshot.

Re: SymbOS: Graphical Z80 Multitasking Operating System

#39
post #9

Symbos is pretty cool but it's a crying shame that it's closed source. A lot of people in the z80 community don't understand the value of open source, but will give away binaries for free.

Indeed, and it makes it harder for me to port to a Kaypro II

Re: SymbOS: Graphical Z80 Multitasking Operating System

#40

The specs on this are kind of weird. Z80, 1MB memory, 2TB HDD. Is this some kind of super Z80 clocked at 50+Mhz? I tend to think of Z80 systems as having 32-128kB of memory and 400k floppies for storage.

I think it means 1024 kB of addressable virtual memory.

The Amstrad CPC had 64K or 128K of RAM + 32K of ROM (in a total addressable space of 64K) using "RAM banking". The Amstrad PCW was the same but with even more RAM (up to 512K). This worked very differently from what we now think of as virtual memory.

On the CPC it worked as follows: There were two 16K ROMs, located at 0-16K and 48K-64K. The 16K-48K middle area contained 32K of fixed RAM.

The upper and lower ROM areas were shadowed by RAM. By writing to an IO port you could switch in either the ROM or a 16K bank of RAM individually into each of those two 16K areas. There was an elaborate system of trampolines to allow the ROM functions to be called, or for the ROMs to read/write to the bank of RAM "hidden" under them.

Edit: https://news.ycombinator.com/item?id=16079674 explains how RAM banking works in Symbos.

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