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Forum: Coders. Asm / Hardware 11 September 2018, 22:03
Replies: 17
Views: 512
Posted By Bruce Abbott
Yeah, I got caught by that one. However the end...

Yeah, I got caught by that one. However the end result is the same, so if it wasn't for expecting identical output from re-assembly it wouldn't bother me.

My disassembler doesn't use scripts, it...
Forum: Coders. Asm / Hardware 11 September 2018, 04:15
Replies: 17
Views: 512
Posted By Bruce Abbott
Some assemblers can optionally change...

Some assemblers can optionally change instructions to save typing or optimize the output. For general purpose programming the exact encoding doesn't matter so this is fine. If you need precise...
Forum: Coders. Asm / Hardware 04 September 2018, 23:37
Replies: 498
Views: 13,706
Posted By Bruce Abbott
Kinda interesting that popular X86 disassemblers...

Kinda interesting that popular X86 disassemblers have trouble dealing with what look to be basic instructions.

The only time I ever needed to disassemble a Windows program, IDA pro couldn't do it...
Forum: Coders. Asm / Hardware 04 September 2018, 22:48
Replies: 498
Views: 13,706
Posted By Bruce Abbott
Soon there may be another choice. I am working on...

Soon there may be another choice. I am working on an interactive disassembler that - most of the time - does get it 100% right, and only needs a few mouse clicks to change the type when it is wrong.
Forum: Coders. Asm / Hardware 04 September 2018, 22:09
Replies: 498
Views: 13,706
Posted By Bruce Abbott
I'm sure there is a way, even if it involves...

I'm sure there is a way, even if it involves poking hex bytes directly into the object code. Because assembly language must be avoided at all costs! Then you make it 'portable' by sprinkling #ifdefs...
Forum: Coders. Asm / Hardware 04 September 2018, 01:46
Replies: 498
Views: 13,706
Posted By Bruce Abbott
Sure, but can it be beatified...

Sure, but can it be beatified (https://en.wikipedia.org/wiki/Beatification)? ;)

One problem with using a modern web browser is that you rely on it to correct spelling mistakes. Now that I am using...
Forum: Amiga scene 04 September 2018, 00:18
Replies: 67
Views: 3,082
Posted By Bruce Abbott
And the people who really want originals will get...

And the people who really want originals will get them, because prices are relatively still low.

OTOH if you just want a working A1200 then you can wire an A500 keyboard directly to the...
Forum: Coders. Asm / Hardware 02 September 2018, 21:49
Replies: 498
Views: 13,706
Posted By Bruce Abbott
68k code doesn't need beatifying - it's naturally...

68k code doesn't need beatifying - it's naturally beatiful!
Forum: Amiga scene 01 September 2018, 12:14
Replies: 67
Views: 3,082
Posted By Bruce Abbott
Well to make up for my sins I am now buying...

Well to make up for my sins I am now buying broken vintage computers and restoring them. :) My last purchase was an A500 motherboard with bad RAM, which I got off Trademe (NZ auction site) for $15....
Forum: Coders. Asm / Hardware 29 August 2018, 21:45
Replies: 498
Views: 13,706
Posted By Bruce Abbott
You could argue that the 68000 should be able to...

You could argue that the 68000 should be able to do it in 4 cycles (2 cycles per memory access) but by that reasoning the 6502 should be able to do it in half a cycle. The truth is that the 68000 and...
Forum: Amiga scene 29 August 2018, 09:32
Replies: 67
Views: 3,082
Posted By Bruce Abbott
Yes that was very silly, but you are not the only...

Yes that was very silly, but you are not the only one. 4 years ago I had to declutter while moving house. I threw away two CD32s and an A600 with 68030 accelerator, because "the Amiga scene is dead...
Forum: Coders. Asm / Hardware 26 August 2018, 06:50
Replies: 498
Views: 13,706
Posted By Bruce Abbott
Yes, RAM was generally the most expensive part....

Yes, RAM was generally the most expensive part. Commodore originally (http://scacom.bplaced.net/Collection/velvet/velveten.php) wanted the A1000 to have only 128k on the motherboard, to keep costs...
Forum: Coders. Asm / Hardware 24 August 2018, 23:06
Replies: 498
Views: 13,706
Posted By Bruce Abbott
And what did they do it with? ...

And what did they do it with?

microprocessors used in spacecrafts (https://en.wikichip.org/wiki/microprocessors_used_in_spacecrafts)

The Galileo...
Forum: Coders. Asm / Hardware 24 August 2018, 22:35
Replies: 498
Views: 13,706
Posted By Bruce Abbott
True, and that means a 68000 running at 7MHz...

True, and that means a 68000 running at 7MHz doesn't make best use of possible Fast RAM bandwidth. Which was a good thing. Why? because having no great performance improvement with Fast RAM meant...
Forum: Amiga scene 24 August 2018, 09:04
Replies: 332
Views: 44,731
Posted By Bruce Abbott
'Ridiculous prices' is selling a second-hand...

'Ridiculous prices' is selling a second-hand Blizzard 1230-IV for the same price as a Vampire.

A simulator doesn't have to act 100% the same, it only has to look like it's (close enough to) the...
Forum: Coders. Asm / Hardware 23 August 2018, 03:34
Replies: 498
Views: 13,706
Posted By Bruce Abbott
At the time it was cutting edge technology... ...

At the time it was cutting edge technology...

BBC Micro (https://en.wikipedia.org/wiki/BBC_Micro)And yet the BBC micro had sucky graphics, wasting half the colors and using too much precious RAM....
Forum: Coders. Asm / Hardware 23 August 2018, 02:50
Replies: 498
Views: 13,706
Posted By Bruce Abbott
My A500 (rev 5 motherboard) has 120ns RAM....

My A500 (rev 5 motherboard) has 120ns RAM. Earlier versions had 150ns RAM.

When the OCS chipset was designed 256k DRAM speeds ranged from 100 to 200ns, with the faster chips commanding a premium...
Forum: Coders. Asm / Hardware 22 August 2018, 06:51
Replies: 498
Views: 13,706
Posted By Bruce Abbott
The 68000 takes 4 clocks per memory cycle, while...

The 68000 takes 4 clocks per memory cycle, while the 80286 only needs 2. But that means the 80286 needs memory which is twice as fast. The original IBM AT had a 6MHz 80286 CPU, but ran with 1 wait...
Forum: Amiga scene 09 August 2018, 20:54
Replies: 112
Views: 5,717
Posted By Bruce Abbott
Off topic. This thread is about what "blows your...

Off topic. This thread is about what "blows your mind" about using an Amiga, not what makes you feel envious and inadequate.

One of the things I love about the Amiga is that it doesn't put me in a...
Forum: Nostalgia & memories 04 August 2018, 03:35
Replies: 106
Views: 10,721
Posted By Bruce Abbott
Meh. Give me an 8 bit demo that does things which...

Meh. Give me an 8 bit demo that does things which should be impossible on a machine with no Blitter or Copper or sprites.

https://www.youtube.com/watch?v=6wBwbRYL-F4
Forum: Nostalgia & memories 24 July 2018, 09:53
Replies: 147
Views: 6,666
Posted By Bruce Abbott
Nonsense. It just meant that programmers couldn't...

Nonsense. It just meant that programmers couldn't get away with producing buggy code that trashed memory.

In the early days there was a lot of buggy code which deserved criticism. My first Amiga...
Forum: Amiga scene 12 July 2018, 05:02
Replies: 262
Views: 19,718
Posted By Bruce Abbott
Judging by the content of this board I suspect...

Judging by the content of this board I suspect very few of us are keen on doing too much real work on our Amigas!

You are right about the lack of 'ecosystem' being the killer, but for the Amiga...
Forum: Amiga scene 26 June 2018, 04:18
Replies: 14
Views: 1,521
Posted By Bruce Abbott
Yes, it's so good that hires is often usable even...

Yes, it's so good that hires is often usable even when converted to Composite. Here's a photo of my Workbench in 640x256 8 colors, connected via the A1200's composite output to my 32" LCD TV. This...
Forum: Amiga scene 15 June 2018, 10:29
Replies: 75
Views: 6,883
Posted By Bruce Abbott
The government can see what pages I am viewing on...

The government can see what pages I am viewing on EAB? This blatant invasion of privacy is intolerable!

I bet they also have my password and have been logging in to my account. Those inflammatory...
Forum: Amiga scene 15 June 2018, 10:07
Replies: 106
Views: 4,377
Posted By Bruce Abbott
Especially when they don't support your...

Especially when they don't support your narrative.

No, it isn't.

Only a few 'System-On-Chip' microcontrollers are capable of running Linux properly (you can...
Forum: Amiga scene 15 June 2018, 01:53
Replies: 106
Views: 4,377
Posted By Bruce Abbott
Desktop PC OS market share...

Desktop PC OS market share (http://gs.statcounter.com/os-market-share/desktop/worldwide)
Windows 82%
OSX 13%
Linux 1.6%
Forum: Amiga scene 14 June 2018, 18:40
Replies: 14
Views: 1,521
Posted By Bruce Abbott
Many 80's home computers produced YUV internally,...

Many 80's home computers produced YUV internally, because that was easier to convert to NTSC/PAL. Of course due to limited graphics memory and bandwidth they mapped a small number of colors into the...
Forum: Amiga scene 12 June 2018, 01:34
Replies: 106
Views: 4,377
Posted By Bruce Abbott
Sorry, but I have to disagree. Definition of...

Sorry, but I have to disagree.

Definition of "Operating Sytem":

1. the low-level software that supports a computer's basic functions, such as scheduling tasks and controlling peripherals.
...
Forum: Amiga scene 10 June 2018, 06:02
Replies: 30
Views: 1,545
Posted By Bruce Abbott
It can make a huge difference in some...

It can make a huge difference in some circumstances, but I still say that in practice few CD32 titles would have been significantly improved.

Why not? First the technical reasons:-

1. In most...
Forum: Amiga scene 09 June 2018, 14:58
Replies: 30
Views: 1,545
Posted By Bruce Abbott
Upsides: 1. slightly faster code ...

Upsides:
1. slightly faster code

Downsides:
1. less memory for graphics and sound

2. Increased hardware costs

3. Lower compatibiliy with stock A1200
Forum: Amiga scene 31 May 2018, 18:50
Replies: 106
Views: 4,377
Posted By Bruce Abbott
If developers want their applications to run on...

If developers want their applications to run on multiple platforms then they have to accept the limitations of those platforms. But of course that is unacceptble for NG Amiga, which must include...
Forum: Amiga scene 17 May 2018, 14:15
Replies: 625
Views: 29,378
Posted By Bruce Abbott
"file is not executable". Where can I get...

"file is not executable".

Where can I get the source code, to compile a version that works?
Forum: Amiga scene 13 May 2018, 11:46
Replies: 625
Views: 29,378
Posted By Bruce Abbott
All completely unnecessary. The only thing a game...

All completely unnecessary. The only thing a game really needs is playability - everything else is just window dressing. Would Lemmings, Dune II or The Settlers play any better in 3D with 16 bit...
Forum: Amiga scene 13 May 2018, 02:36
Replies: 625
Views: 29,378
Posted By Bruce Abbott
:) And this proves?

:)

And this proves?
Forum: Amiga scene 12 May 2018, 20:20
Replies: 625
Views: 29,378
Posted By Bruce Abbott
If it's 'neigh on impossible' for his Amiga then...

If it's 'neigh on impossible' for his Amiga then it must be totally impossible with only 16MB and a 50MHz 030, without javascript or CSS, on a PAL hires interlace screen in 8 colors to a TV via CVBS,...
Forum: Amiga scene 10 May 2018, 17:14
Replies: 625
Views: 29,378
Posted By Bruce Abbott
Spectre and Meltdown are just the latest proof...

Spectre and Meltdown are just the latest proof that despite memory protection and other security concepts 'modern' operating systems are still vulnerable. I have gone back to using my Amiga for...
Forum: Amiga scene 30 April 2018, 06:59
Replies: 625
Views: 29,378
Posted By Bruce Abbott
0Next Generation Amiga:- - No 680x0 CPU...

0Next Generation Amiga:-

- No 680x0 CPU (binary compatibility via emulation only).
- No bitplanes, no sprites, no Copper, no Paula, no CIAs.
- No joystick port, no mouse port, no Amiga keys.
-...
Forum: Amiga scene 26 April 2018, 03:19
Replies: 625
Views: 29,378
Posted By Bruce Abbott
Yes, if you push the AGA chipset to the max then...

Yes, if you push the AGA chipset to the max then it will be slow. I blame Commodore for this - they allowed to it run screen modes that used up all the chipram bandwidth and then promoted them as an...
Forum: Amiga scene 24 April 2018, 22:34
Replies: 625
Views: 29,378
Posted By Bruce Abbott
I had an A3000 with 68060, so I know that the CPU...

I had an A3000 with 68060, so I know that the CPU can be a factor. But of course the hardware is also a factor, which is why I want an accelerator card (unless someone can produce a chipset which is...
Forum: Amiga scene 24 April 2018, 21:28
Replies: 625
Views: 29,378
Posted By Bruce Abbott
I don't remember 'heavy' OCS/ECS compatibility...

I don't remember 'heavy' OCS/ECS compatibility issues. I do remember games that wouldn't work on Kickstart 1.3 or 2.x, 1MB RAM, or even a second disk drive. These early incompatibilities were mostly...
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