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Forum: News 06 December 2019, 12:10
Replies: 3
Views: 519
Posted By grond
Dave Haynie on FPGAs

Interesting article from one of the Amiga hardware gods:

https://www.quora.com/Does-FPGA-get-rid-of-the-hardware-software-distinction/answer/Dave-Haynie
Forum: Coders. General 28 November 2019, 16:32
Replies: 9
Views: 385
Posted By grond
I'm pretty sure the HNY96 virus was first...

I'm pretty sure the HNY96 virus was first distributed at The Party 5 in Denkmark where I got it from some guys who wanted to copy some floppy disks on my computer (I was too tired to wonder why the...
Forum: Amiga scene 27 November 2019, 11:37
Replies: 390
Views: 33,639
Posted By grond
The hater comments are entertaining, too. E.g....

The hater comments are entertaining, too. E.g. this "ChuckyGang" character not understanding that Doom on the V4 was running in AGA (including all the c2p and copying from fastmem to (equally fast)...
Forum: Amiga scene 17 November 2019, 12:23
Replies: 35
Views: 2,836
Posted By grond
Again?

Again?
Forum: Coders. Asm / Hardware 13 November 2019, 13:05
Replies: 12
Views: 592
Posted By grond
Interesting! How did you test that?

Interesting! How did you test that?
Forum: Coders. Asm / Hardware 13 November 2019, 11:33
Replies: 12
Views: 592
Posted By grond
What value will end up in A7 in your example? The...

What value will end up in A7 in your example? The post-incremented old stack pointer, the post-incremented new stack pointer or the non-incremented new stack pointer? And is that really the same as...
Forum: Coders. Asm / Hardware 12 November 2019, 13:44
Replies: 12
Views: 592
Posted By grond
Why should it not be valid? What do you do with...

Why should it not be valid? What do you do with the old SP you get in An when you need An for other purposes? You push it on the new stack. Unless I misunderstand the UNLK instruction, you can read...
Forum: Coders. General 11 November 2019, 14:43
Replies: 274
Views: 10,452
Posted By grond
I assume the base vectors still cripple away with...

I assume the base vectors still cripple away with this approach, i.e. become skewed? If so, I think you could always recalculate the third base vector from the renormalised first two and change on...
Forum: Coders. General 11 November 2019, 11:07
Replies: 28
Views: 1,096
Posted By grond
Aw, damn... ;)

Aw, damn... ;)
Forum: Coders. General 11 November 2019, 11:06
Replies: 28
Views: 1,096
Posted By grond
I have 68k code for an integer sin/cos Taylor...

I have 68k code for an integer sin/cos Taylor approximation with a maximum error of something like 0.5% somewhere. It uses four MULs, IIRC and might be 020+ only, I don't remember, I never coded for...
Forum: Coders. General 11 November 2019, 10:43
Replies: 28
Views: 1,096
Posted By grond
Your player runs around in all possible...

Your player runs around in all possible directions. If the player runs within say 1% of a rectangular angle (i.e. almost aligned with either the x or y axes) just reset him to exactly x or y aligned...
Forum: Coders. General 10 November 2019, 09:08
Replies: 28
Views: 1,096
Posted By grond
In a Doom-type game you could just reset the...

In a Doom-type game you could just reset the vectors each time the player view more or less aligns with one of the base vectors. Who would notice, when turning around, that one turn had a slightly...
Forum: Coders. Asm / Hardware 06 November 2019, 14:44
Replies: 18
Views: 836
Posted By grond
Why do you want to consider the distance? ...

Why do you want to consider the distance?

You could do a dx/dy and then use the result to look up suitable DeltaX and DeltaY from a small table.
Forum: Coders. Asm / Hardware 04 November 2019, 20:39
Replies: 29
Views: 1,334
Posted By grond
In order to do burst accesses, I guess one would...

In order to do burst accesses, I guess one would want 16 bytes aligned addresses similar to the 040's move16 instruction?
Forum: Coders. Asm / Hardware 04 November 2019, 18:44
Replies: 29
Views: 1,334
Posted By grond
Interesting! Thanks for the explanation. Do you...

Interesting! Thanks for the explanation. Do you also happen to know how the 030 will treat filling a dcache line for an uncached fastmem address?

Edited to add: is the 020 equal to the 030 with...
Forum: Coders. Asm / Hardware 04 November 2019, 18:23
Replies: 29
Views: 1,334
Posted By grond
How does the 030 then fill a 16byte data cache...

How does the 030 then fill a 16byte data cache line? BTW, I also seem to remember finding that activating burst reads didn't seem to make any difference but I think I concluded that, since this...
Forum: Coders. Asm / Hardware 04 November 2019, 18:09
Replies: 29
Views: 1,334
Posted By grond
As I wrote, on 030 the read will probably cause a...

As I wrote, on 030 the read will probably cause a read burst from fastmem and this will likely take more cycles than what is available between two chipmem accesses, no?
Forum: Coders. Asm / Hardware 04 November 2019, 17:31
Replies: 29
Views: 1,334
Posted By grond
I think you are making some wrong assumption....

I think you are making some wrong assumption. AFAIK the 020 will NOT continue execution of the instruction stream while the last written date is waiting for the chipmem to take it. The 060 is the...
Forum: News 20 October 2019, 09:36
Replies: 25
Views: 4,171
Posted By grond
The Vampire AGA core you are mentioning is from...

The Vampire AGA core you are mentioning is from 2017. The 080 bitfield instructions were fixed long ago. If you look at the V4, you'll see that there is no problem.
Forum: Amiga scene 05 September 2019, 11:34
Replies: 268
Views: 26,851
Posted By grond
I totally agree! I couldn't enjoy listening to...

I totally agree! I couldn't enjoy listening to music within the FPS action part, it would totally distract me from the game. AB3D did a perfect job with the foot step sound changing with the ground...
Forum: Amiga scene 04 September 2019, 10:55
Replies: 268
Views: 26,851
Posted By grond
@KK/Altair: About the dithering, have you...

@KK/Altair:

About the dithering, have you tried how shifting the repeated line by one pixel looks? This should come for free and might break up the vertical line (but might as well look even...
Forum: support.Hardware 27 August 2019, 11:41
Replies: 29
Views: 2,075
Posted By grond
Your welcome, although that is no secret. ...

Your welcome, although that is no secret.








I think some of those SCSI controllers can be set to not use DMA. With the Z2 bus limited to something like 3.5 MB/s, the V500's internal...
Forum: support.Hardware 26 August 2019, 14:53
Replies: 29
Views: 2,075
Posted By grond
The only thing that has changed is the amount of...

The only thing that has changed is the amount of deliberate badmouthing of the Vampire since more and more people got one to try for themselves. The status of Z2 cards in an A2000 has not changed...
Forum: support.Hardware 30 July 2019, 16:16
Replies: 35
Views: 2,071
Posted By grond
While I personally think the 233 MHz 060 number...

While I personally think the 233 MHz 060 number only holds for some specific tasks and other than that is exaggerated, for all I know the 080 is faster than a 100 MHz 060 (but a lot closer to 100 MHz...
Forum: support.Hardware 29 July 2019, 14:10
Replies: 35
Views: 2,071
Posted By grond
Is it?

Is it?
Forum: support.Hardware 29 July 2019, 09:35
Replies: 35
Views: 2,071
Posted By grond
No, the Amiga is lacking too much software to...

No, the Amiga is lacking too much software to begin with. Of your list a Vampire Amiga can do:


surf html-only web sites
watch Youtube by using videoconversion sites
play mp3s
watch videos in...
Forum: Amiga scene 26 July 2019, 18:14
Replies: 970
Views: 56,508
Posted By grond
Perhaps one of the PC's biggest advantages in the...

Perhaps one of the PC's biggest advantages in the 90s was that it allowed its owners to delude themselves with regard to the money spent on upgrades. Let's get a new graphics card, let's get a...
Forum: Amiga scene 26 July 2019, 15:53
Replies: 390
Views: 33,639
Posted By grond
The mode switching on x86 processors has to do...

The mode switching on x86 processors has to do with the (old and deprecated) FPU instruction opcodes being reused for encoding MMx instructions. This is not the case for AMMx where AMMx and FPU...
Forum: support.Hardware 26 July 2019, 15:19
Replies: 41
Views: 7,735
Posted By grond
I'm pretty sure the CS-Lab guys will build and...

I'm pretty sure the CS-Lab guys will build and sell the boards themselves.
Forum: Amiga scene 26 July 2019, 14:10
Replies: 15
Views: 1,920
Posted By grond
Thanks!

Thanks!
Forum: Amiga scene 26 July 2019, 13:51
Replies: 15
Views: 1,920
Posted By grond
Is there any explanation about what one has to do...

Is there any explanation about what one has to do in that type of game? "Chip's Challenge" get a very decent score just above 8 on lemonamiga...
Forum: support.Hardware 26 July 2019, 13:34
Replies: 41
Views: 7,735
Posted By grond
That looks like a great product and certainly...

That looks like a great product and certainly more real than any rumoured ACA1240/1260! No wonder Jens is leaving the Amiga business.
Forum: Amiga scene 26 July 2019, 12:34
Replies: 970
Views: 56,508
Posted By grond
From my point of view all our discussion was...

From my point of view all our discussion was about how in detail Commodore presented too little of an upgrade with the A1200. Looking at the details required looking at what they could have and...
Forum: News 26 July 2019, 08:23
Replies: 167
Views: 32,134
Posted By grond
Yes and no. The 080 has additional registers...

Yes and no. The 080 has additional registers which the FPU can use. The higher number of registers is useful for matrix operations for which the only eight registers of the original FPU aren't enough...
Forum: Amiga scene 25 July 2019, 19:43
Replies: 390
Views: 33,639
Posted By grond
I would like to see your setup running on a real...

I would like to see your setup running on a real 060+RTG Amiga.
Forum: Amiga scene 25 July 2019, 14:48
Replies: 970
Views: 56,508
Posted By grond
BTW, RESHOOT-R is technically a great game and...

BTW, RESHOOT-R is technically a great game and those overlays would not have been possible with PC graphics cards of the 90s or with just an 8 bit chunky mode. It would definitely have done well...
Forum: Amiga scene 25 July 2019, 14:12
Replies: 970
Views: 56,508
Posted By grond
Well, I stated many times that a CPU grade made a...

Well, I stated many times that a CPU grade made a three-digit difference in the major currencies. The hypothetical Amiga-saviour computers I described would have come out instead of the A3000 and...
Forum: Amiga scene 24 July 2019, 18:39
Replies: 970
Views: 56,508
Posted By grond
Regarding the "one CPU grade didn't make much of...

Regarding the "one CPU grade didn't make much of a difference" discussion:

I was kindly pointed to one ad and a test report from March 1991. The test report lists the following prices for...
Forum: Amiga scene 24 July 2019, 16:24
Replies: 970
Views: 56,508
Posted By grond
Unfortunately I haven't found any price info on...

Unfortunately I haven't found any price info on the A3000 16 MHz vs. the A3000 25 MHz yet. I'm pretty sure that that CPU grade difference meant a very significant price difference in 1990.



...
Forum: Amiga scene 24 July 2019, 15:01
Replies: 970
Views: 56,508
Posted By grond
I googled a bit an found an ad with these prices:...

I googled a bit an found an ad with these prices:

A600: 549 DM
A600+40MB HDD: 948 DM

A1200: 889 DM
A1200+64MB HDD: 1450 DM
A1200+130MB HDD:...
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