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Search: Posts Made By: Megol
Forum: Coders. Asm / Hardware 15 November 2018, 22:41
Replies: 802
Views: 27,303
Posted By Megol
And this is a surprise to you? Segmentation in...

And this is a surprise to you? Segmentation in itself can be a useful tool however the x86 version isn't very good. The best use of the protected mode version of it (where a segment number is used as...
Forum: Coders. Asm / Hardware 13 November 2018, 20:10
Replies: 802
Views: 27,303
Posted By Megol
Yes, doing a full pointer comparison in segmented...

Yes, doing a full pointer comparison in segmented x86 isn't too nice. Not a common problem though.

The processor use "pointer" comparisons but only after calculating the linear address, not a...
Forum: Coders. Asm / Hardware 11 November 2018, 18:44
Replies: 802
Views: 27,303
Posted By Megol
Many of them sure but the 486 had a nice...

Many of them sure but the 486 had a nice price/performance with multiple sources. Embedded is strange sometimes, there are still COSMAC 1802 processors in use today.

Don't remember sadly. Searched...
Forum: Coders. Asm / Hardware 11 November 2018, 15:48
Replies: 802
Views: 27,303
Posted By Megol
Define architectures. The 80486 was manufactured...

Define architectures. The 80486 was manufactured until 2008 IIRC and used in many embedded systems. But I would be surprised if most of those didn't use modified PC designs given that it works and...
Forum: Coders. Asm / Hardware 10 November 2018, 16:08
Replies: 802
Views: 27,303
Posted By Megol
Without a definition of "modern" the question...

Without a definition of "modern" the question becomes impossible to answer.
However there are a lot of languages that are inspired by C that can be considered modern with some examples being Swift...
Forum: Coders. Asm / Hardware 01 November 2018, 21:09
Replies: 802
Views: 27,303
Posted By Megol
8MHz processor and little memory.

8MHz processor and little memory.
Forum: Coders. Asm / Hardware 01 November 2018, 17:39
Replies: 802
Views: 27,303
Posted By Megol
Let's extract the part relevant to this thread:...

Let's extract the part relevant to this thread: "Jaggies everywhere".
Yes. That's a given with that resolution and isn't architecture dependent, a really fast machine can use subpixel precise...
Forum: Coders. Asm / Hardware 31 October 2018, 16:22
Replies: 802
Views: 27,303
Posted By Megol
If using the processor is faster - yes. Which is...

If using the processor is faster - yes. Which is how things already are, the chipset is reduced to a bottleneck for a c2p-converted 68060 rendered screen.

Nope. Even in an intensive side-scrolling...
Forum: Coders. Asm / Hardware 30 October 2018, 16:25
Replies: 802
Views: 27,303
Posted By Megol
Thanks for the correction. That's an ugly...

Thanks for the correction. That's an ugly instruction for something intended to be a Scalable Processor ArchiteCture.


Vertical scrolling is supported directly, horizontal can be done by...
Forum: Coders. Asm / Hardware 29 October 2018, 17:00
Replies: 802
Views: 27,303
Posted By Megol
DIVS? ARM added integer division after 2010 IIRC,...

DIVS? ARM added integer division after 2010 IIRC, don't think microcode is involved.


MIPS used an ugly hack for integer multiplication as it didn't fit into the ordinary pipeline but it was...
Forum: Coders. Asm / Hardware 15 October 2018, 17:40
Replies: 802
Views: 27,303
Posted By Megol
Is this thread still going?!? And with the same...

Is this thread still going?!? And with the same "quality" argumentation too.

The 68k is obviously the better ISA compared to x86, more registers, flexibility, address modes, and a lot more. But...
Forum: Coders. Asm / Hardware 06 September 2018, 11:56
Replies: 802
Views: 27,303
Posted By Megol
Yes I wonder what you will bring next. Pot kettle...

Yes I wonder what you will bring next. Pot kettle etc.
Forum: Coders. Asm / Hardware 05 September 2018, 22:30
Replies: 802
Views: 27,303
Posted By Megol
As it is indeed portable C I do claim that. ...

As it is indeed portable C I do claim that.


At least try to have a basic level of knowledge before trying to discuss something. I already told you BTW.
Forum: Coders. Asm / Hardware 04 September 2018, 21:40
Replies: 802
Views: 27,303
Posted By Megol
And yet people have done it. Several times in...

And yet people have done it. Several times in fact. The stack problem can be worked around by copying(!) the stack when switching tasks, a hack for sure.

Again there are limitations but it's 100%...
Forum: Coders. Asm / Hardware 04 September 2018, 20:31
Replies: 802
Views: 27,303
Posted By Megol
One can write a multitasking OS in 100% standard...

One can write a multitasking OS in 100% standard C. It would have limitations but it's possible. Hint: setjmp.h
Forum: Coders. Asm / Hardware 03 September 2018, 11:50
Replies: 802
Views: 27,303
Posted By Megol
But it isn't true. I posted just some examples,...

But it isn't true. I posted just some examples, there are more.
I also posted some examples of other systems that had proper multitasking very late (68k based Macintosh) or never (ARM based RiscOS)....
Forum: Coders. Asm / Hardware 02 September 2018, 19:14
Replies: 802
Views: 27,303
Posted By Megol
Intel iRMX was released in 1980. Then we have...

Intel iRMX was released in 1980. Then we have other released soon after the IBM PC release: Xenix and QNX.

Was actually thinking of Xenix but that released later though on a non-IBM system.


...
Forum: Coders. Asm / Hardware 02 September 2018, 14:15
Replies: 802
Views: 27,303
Posted By Megol
I actually don't believe you. If that is your...

I actually don't believe you. If that is your honest opinion you would be delusional and while we disagree on many things I don't think you are delusional.

Multitasking 8086 systems were in use...
Forum: Coders. Asm / Hardware 01 September 2018, 23:51
Replies: 802
Views: 27,303
Posted By Megol
It's mostly a relic of the past. All the cool...

It's mostly a relic of the past. All the cool kids* even program small microcontrollers in C using "frameworks" :(
Still better than those BASIC stamp thingies.

(* well, old cool kids I guess)
Forum: Coders. Asm / Hardware 01 September 2018, 23:45
Replies: 802
Views: 27,303
Posted By Megol
Now you got to be trolling?

Now you got to be trolling?
Forum: Coders. Asm / Hardware 01 September 2018, 23:34
Replies: 802
Views: 27,303
Posted By Megol
You see people argue about everything: politics,...

You see people argue about everything: politics, weather, the correct way to wear pants, and which end of a boiled egg should be opened (the small end of course). So why not argue about 30 yo...
Forum: Coders. Asm / Hardware 01 September 2018, 21:40
Replies: 802
Views: 27,303
Posted By Megol
An IBM XT with not only a 8086 but one at...

An IBM XT with not only a 8086 but one at 9.54MHz? I think that isn't correct, really sure about that in fact.

The XT had a 4.77MHz 8088 and the next step in the lower segment of x86 was a PS/2...
Forum: Coders. Asm / Hardware 29 August 2018, 20:41
Replies: 802
Views: 27,303
Posted By Megol
Stop being confrontational please thank you very...

Stop being confrontational please thank you very much. It's irritating.
Forum: Amiga scene 28 August 2018, 20:05
Replies: 323
Views: 45,817
Posted By Megol
Looks great!

Looks great!
Forum: Amiga scene 27 August 2018, 11:42
Replies: 64
Views: 5,189
Posted By Megol
No love for the rutabagas :(

No love for the rutabagas :(
Forum: Coders. Asm / Hardware 26 August 2018, 19:47
Replies: 802
Views: 27,303
Posted By Megol
What exactly do you think is wrong? Page access...

What exactly do you think is wrong? Page access isn't the same as _fast_ page access which came with FPM memory. Never claimed otherwise.

I just tried to find timing for a normal R/W cycle and a...
Forum: Coders. Asm / Hardware 26 August 2018, 13:24
Replies: 802
Views: 27,303
Posted By Megol
Spent some time reading old magazines and other...

Spent some time reading old magazines and other sources of information of the great dark ages of computing (;p).

The short of it: there were no 70ns DRAM in 1979 when the 68000 was released, there...
Forum: Amiga scene 24 August 2018, 12:33
Replies: 332
Views: 47,385
Posted By Megol
One can't really call FPGAs hardware - they are...

One can't really call FPGAs hardware - they are more of hardware emulators. They consist of lookup tables coupled with programmable routing.

And while even I have some aversion towards emulation...
Forum: Amiga scene 23 August 2018, 23:18
Replies: 332
Views: 47,385
Posted By Megol
How could he answer that given that AMMX2 isn't...

How could he answer that given that AMMX2 isn't documented nor described?
Forum: Coders. Asm / Hardware 23 August 2018, 11:46
Replies: 802
Views: 27,303
Posted By Megol
And my late edition Amiga 600 have 100ns DRAM in...

And my late edition Amiga 600 have 100ns DRAM in it, just checked. How does that prove anything?

The fact is that real computers at the time didn't use this 70ns DRAM, that memory timings of real...
Forum: Coders. Asm / Hardware 22 August 2018, 23:38
Replies: 802
Views: 27,303
Posted By Megol
70ns came much much later - in Pentium systems,...

70ns came much much later - in Pentium systems, EDO. Premium for 60ns and latest generation EDO had some 50ns chips.

And then remember that EDO DRAM produced at (in that time) top of the line...
Forum: Coders. Asm / Hardware 20 August 2018, 13:52
Replies: 802
Views: 27,303
Posted By Megol
Don't forget that the IBM PC came to market 4...

Don't forget that the IBM PC came to market 4 years before the Amiga 1000 - an expensive system - and 6 years before the more affordable Amiga 500.



Yes? That's obvious, the 68000 is more...
Forum: Coders. Asm / Hardware 20 August 2018, 00:25
Replies: 802
Views: 27,303
Posted By Megol
Fixed in 1982 but yes. Counting...

Fixed in 1982 but yes.



Counting registers how exactly? 8+4 I'd say.

None. For instance instructions like MOVS*, SCAS*, STOS* use fixed registers. The 8086 is a modified accumulator...
Forum: Amiga scene 10 August 2018, 19:32
Replies: 146
Views: 11,834
Posted By Megol
So using the connector itself requires being an...

So using the connector itself requires being an "adopter"? Even if one use it for analog signals as a few people do? Okay, fine.
Forum: Amiga scene 10 August 2018, 16:53
Replies: 146
Views: 11,834
Posted By Megol
Then the question becomes: does Vampire actually...

Then the question becomes: does Vampire actually use the standard and so needing a license? If they send audio signals yes, if they use "protection" features yes. Video signals? In some cases, most...
Forum: Amiga scene 10 August 2018, 13:40
Replies: 146
Views: 11,834
Posted By Megol
So you are claiming that buying a connector and...

So you are claiming that buying a connector and soldering it into a PCB requires a license? The manufacturer pays a license fee to the creator of the connector standard but why would the one paying...
Forum: Amiga scene 10 August 2018, 00:21
Replies: 146
Views: 11,834
Posted By Megol
You mean the digital video output. No HDMI on...

You mean the digital video output. No HDMI on your card. ;)
Forum: Retrogaming General Discussion 06 August 2018, 19:59
Replies: 9
Views: 442
Posted By Megol
Sort of - there were the Kansas city standard...

Sort of - there were the Kansas city standard (yes, had to look up the name). However many common computers used their own format and even if not the actual format of the data varies between...
Forum: Retrogaming General Discussion 13 July 2018, 11:49
Replies: 26
Views: 1,603
Posted By Megol
Haven't looked into that (it's on my list) but...

Haven't looked into that (it's on my list) but have assumed one could use the same solution as on the C64: take the leaked signal (AEC?) and inject an inverted version.

My C128 have extremely...
Forum: Amiga scene 13 July 2018, 11:19
Replies: 10
Views: 790
Posted By Megol
Why?

Why?
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