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Forum: Coders. General 31 March 2021, 20:07
Replies: 91
Views: 8,052
Posted By litwr
Why? We need a proof. We all know that the...

Why? We need a proof. We all know that the Junior, PS/2, PS/1 lines were unsuccessful.
Forum: Coders. General 24 March 2021, 18:20
Replies: 91
Views: 8,052
Posted By litwr
Thank you. However this only is about 1984, so...

Thank you. However this only is about 1984, so it is quite possible that total Apple income in the 80s was greater than that of IBM.
Apple and IBM just worked and got their profits. Commodore...
Forum: Coders. Asm / Hardware 23 March 2021, 18:04
Replies: 1,119
Views: 68,095
Posted By litwr
Commodore could have provided some ground for the...

Commodore could have provided some ground for the 68060. The top Amiga models was the best personal computers for video processing that time. Therefore the 68060 based hardware could easily find...
Forum: Coders. General 20 March 2021, 13:15
Replies: 91
Views: 8,052
Posted By litwr
Apple golden time was the 80s but IMHO their...

Apple golden time was the 80s but IMHO their personal computer revenues exceeded those of IBM even in the 90s.
Forum: Coders. Asm / Hardware 20 March 2021, 12:52
Replies: 1,119
Views: 68,095
Posted By litwr
Maybe Commodore was shut down in 1994 just...

Maybe Commodore was shut down in 1994 just because they could give the 68060 a chance when there were strong players against it.
Forum: Coders. General 14 March 2021, 08:16
Replies: 91
Views: 8,052
Posted By litwr
Sorry I don't understand you. IMHO your claims...

Sorry I don't understand you. IMHO your claims do not match the reality. I had an Amiga. I am the Amiga coder. I like the Amiga very much. My main point is the Amiga was the best home computer...
Forum: Coders. General 11 March 2021, 19:33
Replies: 91
Views: 8,052
Posted By litwr
IMHO the strangest thing about Commodore's...

IMHO the strangest thing about Commodore's marketing around the Amiga is that they sold the Amiga mostly outside of the US. While Apple sold its computers primarily in the USA...
Forum: Coders. General 08 March 2021, 09:37
Replies: 91
Views: 8,052
Posted By litwr
IMHO there was a kind of unwritten rule which...

IMHO there was a kind of unwritten rule which didn't allow to publish comparative data of benchmark results for the Mac and IBM PC. But there were a lot of publications that just assumed that the...
Forum: Coders. Asm / Hardware 08 March 2021, 08:57
Replies: 1,119
Views: 68,095
Posted By litwr
I don't know what is going on here. :( It seems...

I don't know what is going on here. :( It seems that some men just want to degrade this thread and they don't want to discuss their reasons. :( I am just a mere participant. Sorry, in this...
Forum: Coders. Asm / Hardware 23 February 2021, 13:41
Replies: 1,119
Views: 68,095
Posted By litwr
It might be the same register. Just MOVE from SR...

It might be the same register. Just MOVE from SR reads its system part, and MOVE from CCR reads its arithmetic flags.


It is an unexpected claim. Maybe I should prepare a new thread "pi-spigot"...
Forum: Coders. Asm / Hardware 23 February 2021, 13:35
Replies: 1,119
Views: 68,095
Posted By litwr
Thanks for this nice example. However it saves...

Thanks for this nice example. However it saves us one instruction only for very rare cases. Therefore the gain is almost zero. Even meynaf agreed about this. Anyway don't forget that this often...
Forum: Coders. Asm / Hardware 23 February 2021, 13:15
Replies: 1,119
Views: 68,095
Posted By litwr
This table ...

This table (http://www.spiess.ch/emme2/e2news/news08/node4.html) shows that the 80386 is slightly faster than 68030 for the same frequency. This proves my point about this matter.


Indeed if we...
Forum: Coders. Asm / Hardware 21 February 2021, 20:22
Replies: 1,119
Views: 68,095
Posted By litwr
It is an interesting challenge. Maybe in the...

It is an interesting challenge. Maybe in the future.
However it is sad that Amiga programs are often without sources even on Aminet. You know that a man who converted Xlife v2 to Microsoft Windows...
Forum: Coders. Asm / Hardware 21 February 2021, 20:13
Replies: 1,119
Views: 68,095
Posted By litwr
IMHO maybe it is not the best idea to combine two...

IMHO maybe it is not the best idea to combine two threads because
1) the combined thread has become so large that it is very difficult to navigate its content;
2) the first thread was stopped about...
Forum: Coders. Asm / Hardware 14 February 2021, 17:37
Replies: 1,119
Views: 68,095
Posted By litwr
Thank you very much for this nice explanation but...

Thank you very much for this nice explanation but it shows that Motorola as usually made extra things. The use of Carry or Overflow after an assignment is a clear extra op. We can check an...
Forum: Coders. Asm / Hardware 14 February 2021, 16:02
Replies: 1,119
Views: 68,095
Posted By litwr
I agree, I also prefer the DEC PDP-11, 6502,...

I agree, I also prefer the DEC PDP-11, 6502, 680x, and 68k ways over the z80 or x86. But the 68k moved the right idea to the level of a rather illogical quirk. Most people just agree that MOVE must...
Forum: Coders. Asm / Hardware 14 February 2021, 15:57
Replies: 1,119
Views: 68,095
Posted By litwr
The system based on the 68000@12.5Mhz could cost...

The system based on the 68000@12.5Mhz could cost you above $20000 in 1984 while the IBM PC AT were just mass produced and below $4000. Moreover, on 8/16-bit data processing the stock AT could easily...
Forum: Coders. General 14 February 2021, 12:23
Replies: 91
Views: 8,052
Posted By litwr
MacOS was not so good as ads tell us. It was...

MacOS was not so good as ads tell us. It was single-tasking. The first Macs were monochrome. They had a strange mouse. Their system software had poor scalability and this was one reason why they...
Forum: Coders. General 14 February 2021, 12:00
Replies: 91
Views: 8,052
Posted By litwr
Apple had quite a good business until the...

Apple had quite a good business until the mid-90s, later they had a good business too. 1995 was their worst year. Indeed even Commodore helped the IBM PC to become ubiquitous. One can even think...
Forum: Coders. Asm / Hardware 14 February 2021, 08:04
Replies: 1,119
Views: 68,095
Posted By litwr
Thank you very much. You know people often show...

Thank you very much. You know people often show some hate against me. The PDP-11 people don't like my blog much because they thought that their PDP-11 processors were superior to the x86 but the...
Forum: Coders. Asm / Hardware 14 February 2021, 07:53
Replies: 1,119
Views: 68,095
Posted By litwr
I have added information about one more oddity of...

I have added information about one more oddity of the 68000 "Moreover, from the contrived Big Endian byte order, addition and subtraction operations with 32-bit numbers are performed with an...
Forum: Coders. General 12 February 2021, 17:12
Replies: 91
Views: 8,052
Posted By litwr
Despite all minor software drawbacks the Amiga...

Despite all minor software drawbacks the Amiga offered a great environment for programming. WB CLI was like shells of modern Linux. Arexx was like Perl or even Python. GUI was also quite good. ...
Forum: Coders. Asm / Hardware 07 February 2021, 17:55
Replies: 1,119
Views: 68,095
Posted By litwr
I can only repeat that Xlife-8 doesn't have any...

I can only repeat that Xlife-8 doesn't have any Chip RAM accesses during benchmarking in its screen off (calculation only) mode, so it is a pure CPU test.
Forum: Coders. General 07 February 2021, 10:21
Replies: 91
Views: 8,052
Posted By litwr
By standard scripting means? You...

By standard scripting means?



You changed the subject. It was about the correction in OS which stopped clear its timer since WB 2.


You have written an oddity. The $-variables do not work...
Forum: Coders. Asm / Hardware 07 February 2021, 10:04
Replies: 1,119
Views: 68,095
Posted By litwr
Thank you very much. meynaf will be...

Thank you very much.
meynaf will be disappointed that the 6502:Z80 performance ratio is close to 3 there. Some 6502 fanatics still believe that 3 or even 4 is a correct number for this case. :) The...
Forum: Coders. Asm / Hardware 07 February 2021, 10:02
Replies: 1,119
Views: 68,095
Posted By litwr
It sounds very similar to the base Xlife algo but...

It sounds very similar to the base Xlife algo but the Xlife algo is very good for sparse patterns while LightSpeedLife is rather slow with them. In this quality LightSpeedLife is close to Tomas...
Forum: Coders. General 06 February 2021, 11:31
Replies: 91
Views: 8,052
Posted By litwr
It is just your assumption without the real...

It is just your assumption without the real proof.


I was confused by a fact that $ can only be used inside the IF-command. However AmigaDOS Inside & Out (1991) in Engilsh missed $'s...
Forum: Coders. General 31 January 2021, 12:23
Replies: 91
Views: 8,052
Posted By litwr
What does work on the Amiga 500 (with WB 1.3)...

What does work on the Amiga 500 (with WB 1.3) too? The timer reading with long intervals? No it doesn't. You know this. You have written about restricted hardware resources but what document...
Forum: Coders. Asm / Hardware 27 January 2021, 18:11
Replies: 1,119
Views: 68,095
Posted By litwr
@meynaf...

@meynaf http://web.eece.maine.edu/~vweaver/papers/iccd09/ll_document.pdf shows that the 68k and x86 both have good code density.
http://web.eece.maine.edu/~vweaver/papers/iccd09/iccd09_density.pdf -...
Forum: Coders. Asm / Hardware 27 January 2021, 18:02
Replies: 1,119
Views: 68,095
Posted By litwr
Sorry but you are in error. It is very sad to...

Sorry but you are in error. It is very sad to read this from you. :( I didn't give you a reason for this.



So you just denied my quite respectful source of information and provided nothing...
Forum: Coders. General 27 January 2021, 09:30
Replies: 91
Views: 8,052
Posted By litwr
I have made the next improved list of the Amiga...

I have made the next improved list of the Amiga drawbacks:
1) no system functions for working with wildcards - these functions was provided only in ROMs available since 1990;
2) incomplete...
Forum: Coders. Asm / Hardware 25 January 2021, 15:25
Replies: 1,119
Views: 68,095
Posted By litwr
But how could a fantastic number 1001 appear...

But how could a fantastic number 1001 appear then? Such things can't be just accidental. :)



https://apple.fandom.com/wiki/Motorola_68451 clear states that the 68451 was produced for use with...
Forum: Coders. General 25 January 2021, 13:17
Replies: 91
Views: 8,052
Posted By litwr
Yes, I had to buy a bulky device for this. ...

Yes, I had to buy a bulky device for this. However the color composite output is rather useless for AGA graphics.



BTW what was wrong in logic I have presented to you? And you again missed my...
Forum: Coders. General 24 January 2021, 17:52
Replies: 91
Views: 8,052
Posted By litwr
I have upgraded my list of the A1000/500/2000...

I have upgraded my list of the A1000/500/2000 drawbacks. I have removed 3 items and add one:
1) a minor problem with a timer, you can't normally use it for more than 21 minute interval on the A500,...
Forum: Coders. General 24 January 2021, 17:51
Replies: 91
Views: 8,052
Posted By litwr
It is really very sad. I have just asked to help...

It is really very sad. I have just asked to help with an example. :( I have searched much but couldn't find any.



No, I am not redefining. I only assume the quite obvious thing that any...
Forum: Coders. General 24 January 2021, 13:43
Replies: 91
Views: 8,052
Posted By litwr
Thank you very much for your clarificatons about...

Thank you very much for your clarificatons about Fast RAM cards for the Amiga 500. However my misconception about fast RAM for the Amiga 500 has several excuses. All this matter is still rather in...
Forum: Coders. System 24 January 2021, 07:26
Replies: 16
Views: 1,979
Posted By litwr
I have found out that this book...

I have found out that this book (https://ftp.fau.de/aminet/docs/misc/amiga-assembler-buch.pdf) is a very useful source of information. Though it is in German and I know only a little about this...
Forum: Coders. General 23 January 2021, 21:27
Replies: 91
Views: 8,052
Posted By litwr
Thank you. This is something elusive about Fast...

Thank you. This is something elusive about Fast RAM for the A500. I remember my great disappointment when I got 512 KB memory expansion in the 80s and discovered that it is not any faster than the...
Forum: Coders. Asm / Hardware 23 January 2021, 18:46
Replies: 1,119
Views: 68,095
Posted By litwr
68k details (round #2)

Two years ago we had a fantastic thread (http://eab.abime.net/showthread.php?t=93770) which contains a magic number of posts - 1001.
Sorry I was very busy almost all this time and could not afford...
Forum: Coders. General 23 January 2021, 18:31
Replies: 91
Views: 8,052
Posted By litwr
What was wrong with the Amiga 1000/500/2000?

I can point the next drawbacks:

1) error in timer - http://eab.abime.net/showthread.php?t=82392;
2) no system functions for working with wildcards - it was only corrected in the A1200 (maybe in...
Showing results 1 to 40 of 216

 
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