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Search: Posts Made By: Thorham
Forum: OT - Technical 18 August 2018, 21:39
Replies: 20
Views: 515
Posted By Thorham
Lucky bastard :crying

Lucky bastard :crying
Forum: OT - Technical 18 August 2018, 16:19
Replies: 20
Views: 515
Posted By Thorham
Probably won't happen, because plenty of people...

Probably won't happen, because plenty of people require workstations for doing their job.
Forum: OT - Technical 18 August 2018, 00:54
Replies: 20
Views: 515
Posted By Thorham
Actually, it's probably better now than it used...

Actually, it's probably better now than it used to be. It seems progress has been slowing down, not speeding up. When was the last time we saw a major increase in CPU core speed, for example?

Even...
Forum: Retrogaming General Discussion 16 August 2018, 15:17
Replies: 14
Views: 496
Posted By Thorham
Not complaining, just wondering why the C64 gets...

Not complaining, just wondering why the C64 gets these impressive machine pushing conversions and we don't. Perhaps it's because projects on the Amiga have to be relatively big to be really...
Forum: Retrogaming General Discussion 16 August 2018, 13:42
Replies: 14
Views: 496
Posted By Thorham
20:37 isn't so early, right? Anyway, great...

20:37 isn't so early, right?

Anyway, great porting efforts like this make me wonder why we don't have more stuff of this quality level.
Forum: Retrogaming General Discussion 15 August 2018, 20:37
Replies: 14
Views: 496
Posted By Thorham
Did anyone actually watch the video? Or doesn't...

Did anyone actually watch the video? Or doesn't anyone think it's impressive?
Forum: Retrogaming General Discussion 15 August 2018, 14:13
Replies: 14
Views: 496
Posted By Thorham
Eye of the Beholder for the C64.

Here's an amazing Eye of the Beholder port for the C64 (work in progress):

https://www.youtube.com/watch?v=dvWrimZUk40
Forum: project.EAB 14 August 2018, 19:00
Replies: 52
Views: 2,054
Posted By Thorham
Indeed, but it's better than nothing. Still...

Indeed, but it's better than nothing. Still doesn't work when you quote, though, but at least it get's rid of the issue when previewing.
Forum: Coders. Asm / Hardware 14 August 2018, 18:56
Replies: 25
Views: 931
Posted By Thorham
Not really, because asr shifts in the sign bit...

Not really, because asr shifts in the sign bit and lsr doesn't.
Forum: project.EAB 14 August 2018, 18:44
Replies: 52
Views: 2,054
Posted By Thorham
If this is the issue where you get extra empty...

If this is the issue where you get extra empty lines in posts, then just change the editor mode (top right icon of the post editor).
Forum: Coders. Asm / Hardware 14 August 2018, 16:23
Replies: 25
Views: 931
Posted By Thorham
Even when you know 68k?

Even when you know 68k?
Forum: Coders. Asm / Hardware 14 August 2018, 16:05
Replies: 25
Views: 931
Posted By Thorham
Indeed. Have fun implementing a multitasking OS...

Indeed. Have fun implementing a multitasking OS with only one stack, for example.


Can't you do tst rx on x86 with just mov rx,rx or something like that?


Only arithmetic left shift is...
Forum: Coders. General 17 July 2018, 14:34
Replies: 32
Views: 1,251
Posted By Thorham
Depends on the resulting sound quality, space...

Depends on the resulting sound quality, space saving and speed.
Forum: Retrogaming General Discussion 14 June 2018, 20:32
Replies: 58
Views: 3,135
Posted By Thorham
I think I read somewhere that many don't sync...

I think I read somewhere that many don't sync down to 50 Hertz. Perhaps not true?

That's EXACTLY what I'm doing because the circuitry is part of the monitor :p
Forum: Retrogaming General Discussion 13 June 2018, 12:15
Replies: 58
Views: 3,135
Posted By Thorham
CRT, but only because of the horrible LCD up...

CRT, but only because of the horrible LCD up scaling and refresh rate problems.
Forum: Member Introductions 13 June 2018, 11:58
Replies: 2
Views: 359
Posted By Thorham
Welcome to the board :cool

Welcome to the board :cool
Forum: Retrogaming General Discussion 13 June 2018, 11:57
Replies: 197
Views: 7,932
Posted By Thorham
:rolleyes

:rolleyes
Forum: Coders. Asm / Hardware 03 June 2018, 18:50
Replies: 31
Views: 1,622
Posted By Thorham
Thanks :great Depends on how many tiles you...

Thanks :great

Depends on how many tiles you have to flip.

Yes, one size really doesn't fit all in this case. And after all that, there's also the 68060...
Forum: Coders. Asm / Hardware 03 June 2018, 17:23
Replies: 31
Views: 1,622
Posted By Thorham
What exactly? I never really use those bit field...

What exactly? I never really use those bit field instructions.

Here's another one. Uses four 1kb tables:
clr.l d1
move.b d0,d1
move.l (a0,d1.w*4),d1
lsr.w #8,d0
or.l ...
Forum: Coders. Asm / Hardware 03 June 2018, 16:06
Replies: 31
Views: 1,622
Posted By Thorham
I sure hope so :blased How about these...

I sure hope so :blased


How about these (NOT tested!!):
clr.l d1
move.b d0,d1
move.b (a0,d1.w),d0
rol.w #8,d0
move.b d0,d1
move.b (a0,d1.w),d0
Forum: Coders. Asm / Hardware 03 June 2018, 00:25
Replies: 31
Views: 1,622
Posted By Thorham
It simply swaps odd and even bits, bit pairs,...

It simply swaps odd and even bits, bit pairs, nibbles, bytes and finally words.

D0 is both source and destination.
Forum: Coders. Asm / Hardware 03 June 2018, 00:09
Replies: 31
Views: 1,622
Posted By Thorham
Thanks for pointing that out :great Some of the...

Thanks for pointing that out :great Some of the eors have to be ands :banghead Remind me to test code before posting it :o
move.l #$55555555,d1
and.l d0,d1
eor.l d1,d0
add.l ...
Forum: Coders. Asm / Hardware 02 June 2018, 21:58
Replies: 31
Views: 1,622
Posted By Thorham
I somehow doubt that that's going to be faster...

I somehow doubt that that's going to be faster than doing it in code. The 4x indexed addressing mode alone seems slower than the code I posted.
Forum: Coders. Asm / Hardware 01 June 2018, 16:31
Replies: 31
Views: 1,622
Posted By Thorham
Perhaps this: This code is wrong, see my...

Perhaps this:

This code is wrong, see my post below for corrected version.

move.l #$55555555,d1
eor.l d0,d1
eor.l d1,d0
add.l d1,d1
lsr.l #1,d0
or.l ...
Forum: Coders. Contest 26 May 2018, 14:10
Replies: 394
Views: 70,059
Posted By Thorham
Really? Wow :(

Really? Wow :(
Forum: Amiga scene 24 May 2018, 15:41
Replies: 625
Views: 28,134
Posted By Thorham
I bench marked my code on a 50mhz 68030, and it...

I bench marked my code on a 50mhz 68030, and it really is 10 cycles. Obviously, the code was executed from the cache completely.
Forum: Amiga scene 24 May 2018, 14:27
Replies: 625
Views: 28,134
Posted By Thorham
Check the manual. Exg really is 4 and non taken...

Check the manual. Exg really is 4 and non taken byte branches are 4. Just benched it, and my code always executes in 10 cycles.
Forum: Amiga scene 24 May 2018, 14:19
Replies: 625
Views: 28,134
Posted By Thorham
The cmp is 2 cycles, the exg is 4 cycles, the...

The cmp is 2 cycles, the exg is 4 cycles, the bgt.s is 4 cycles when it's not taken and 8 cycles when it is. This adds up to 10 cycles in both cases. Note that this is based on 68030 timings, so it...
Forum: Amiga scene 24 May 2018, 13:34
Replies: 625
Views: 28,134
Posted By Thorham
Faster on 68020 and 68030: cmp.l d0,d1 ...

Faster on 68020 and 68030:
cmp.l d0,d1
bgt.s .l1
exg d0,d1
.l1
Forum: Amiga scene 24 May 2018, 12:18
Replies: 625
Views: 28,134
Posted By Thorham
What's SAS? I tried googling it but that didn't...

What's SAS? I tried googling it but that didn't get me very far.
Forum: Amiga scene 24 May 2018, 11:26
Replies: 625
Views: 28,134
Posted By Thorham
It's more about knowing the concepts involved...

It's more about knowing the concepts involved then about implementing everything in the book as is.

For me, Amiga like wouldn't be the goal of writing a new OS anyway. We already have AOS, AOS 4,...
Forum: Amiga scene 24 May 2018, 10:39
Replies: 625
Views: 28,134
Posted By Thorham
Is it that bad? Indeed. Even old 16bit FPUs...

Is it that bad?

Indeed. Even old 16bit FPUs can handle 64bit (and 80bit!) floats.

:lol

It's the book Operating System Concepts.
Forum: Amiga scene 24 May 2018, 01:16
Replies: 625
Views: 28,134
Posted By Thorham
:D Still doesn't seem too difficult,...

:D

Still doesn't seem too difficult, especially since I have an OS book.

Starting from scratch might not be a bad idea, unless you're running it on a recent CPU. Assuming there's nothing wrong...
Forum: Amiga scene 23 May 2018, 17:43
Replies: 625
Views: 28,134
Posted By Thorham
Somehow I didn't understand exactly what you...

Somehow I didn't understand exactly what you meant :o

No, you don't, but you can still use the script language for automating things if you want.

Just what's in the archive I gave you earlier....
Forum: Amiga scene 23 May 2018, 17:04
Replies: 625
Views: 28,134
Posted By Thorham
The calculator already runs directly. Yeah,...

The calculator already runs directly.

Yeah, I can see how it could be a problem.

How hard can it be?
Forum: Amiga scene 21 May 2018, 22:35
Replies: 625
Views: 28,134
Posted By Thorham
If you mean Lua code, then all I have is in the...

If you mean Lua code, then all I have is in the archive. If it's C, then you need the Cephes library object file and link it to your own test program because I have nothing that runs directly.

A...
Forum: Amiga scene 21 May 2018, 21:07
Replies: 625
Views: 28,134
Posted By Thorham
The Cephes library should be more than mature...

The Cephes library should be more than mature enough. Been around since the early '80s or something. The calculator should also be fine. Would be interesting to see what you can find.

The problem...
Forum: Amiga scene 21 May 2018, 15:37
Replies: 75
Views: 3,637
Posted By Thorham
Wouldn't be surprised if it ends up being...

Wouldn't be surprised if it ends up being possible to just print new chips.
Forum: Amiga scene 21 May 2018, 15:03
Replies: 625
Views: 28,134
Posted By Thorham
It probably isn't.

It probably isn't.
Forum: Amiga scene 21 May 2018, 15:02
Replies: 625
Views: 28,134
Posted By Thorham
Probably because they're used for the wrong thing...

Probably because they're used for the wrong thing or in the wrong way. For a calculator with 384bit floats it really doesn't matter much at all.

Also, some examples would be fun.

Yes, but why...
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