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Search took 0.54 seconds. Search: Posts Made By: Photon
Forum: support.WinUAE 30 March 2022, 01:13
Replies: 912
Views: 256,064
Posted By Photon
I was hoping to record Celebrandil's Progress,...

I was hoping to record Celebrandil's Progress, Peace, and Passion (http://janeway.exotica.org.uk/release.php?id=16246) demo from NS+FLT MD 3 (https://www.pouet.net/prod.php?which=9088) tonight (for...
Forum: support.Hardware 24 January 2022, 21:21
Replies: 4
Views: 455
Posted By Photon
CDTV advice?

Again passion strikes. A friend came over to get a CDTV demo and once again it struck me this great tech was a royal gesture to tell anyone with any interest in technical things that Commodore-Amiga...
Forum: Coders. Releases 04 January 2022, 16:36
Replies: 167
Views: 68,282
Posted By Photon
To be compatible with 68010 and up, the code must...

To be compatible with 68010 and up, the code must do a run-time check for CPU model and decide whether to use MOVEC or not.

A common problem is that in order to compile this for 68000, the MOVEC...
Forum: Amiga scene 03 January 2022, 21:03
Replies: 28
Views: 3,477
Posted By Photon
And another nice crack from Galahad, it's Xmas at...

And another nice crack from Galahad, it's Xmas at New Year! :great (Well, almost... we had to make sure it got tested all the way to the end.)

Cheers for the comments on the intro. :) I uploaded...
Forum: Amiga scene 03 January 2022, 20:39
Replies: 36
Views: 4,149
Posted By Photon
A nice crack by Stingray and with WHDLoad slave...

A nice crack by Stingray and with WHDLoad slave to go with accel fixes too, cheers to all involved! :great
Forum: Coders. Asm / Hardware 14 December 2021, 13:23
Replies: 13
Views: 1,789
Posted By Photon
The question is about Chip RAM, though.

The question is about Chip RAM, though.
Forum: support.Games 14 December 2021, 13:19
Replies: 92
Views: 9,901
Posted By Photon
I answer the question as stated in original post....

I answer the question as stated in original post. This helps keep the topic on topic.
Forum: Coders. Asm / Hardware 13 December 2021, 23:05
Replies: 3
Views: 1,776
Posted By Photon
Late reply, but the scholarly answer is that in...

Late reply, but the scholarly answer is that in binary arithmetic, to preserve precision you work in at least 5 bits higher resolution. Only at the end of the calculation do you round.

Rounding is...
Forum: Coders. Asm / Hardware 13 December 2021, 22:56
Replies: 5
Views: 1,538
Posted By Photon
Amiga sprite behavior is special. I wrote an...

Amiga sprite behavior is special. I wrote an article (http://coppershade.org/articles/AMIGA/Denise/Sprite_Programming/) to detail exactly how to treat them. It's the results of many hours of testing...
Forum: Coders. Asm / Hardware 13 December 2021, 22:48
Replies: 6
Views: 1,402
Posted By Photon
It sounds like you got it working, but here's an...

It sounds like you got it working, but here's an article on Coppershade (http://coppershade.org/articles/AMIGA/Denise/Sprite_Programming/) and a video on Youtube...
Forum: Coders. Asm / Hardware 13 December 2021, 22:34
Replies: 13
Views: 1,789
Posted By Photon
If I understand you correctly, for hardware...

If I understand you correctly, for hardware programming (i.e. running hardware-banging code question), it should be relatively simple and quick to find out how the hardware actually behaves:

With...
Forum: support.Hardware 13 December 2021, 21:59
Replies: 2
Views: 336
Posted By Photon
Do you see any text on screen at all? If not, the...

Do you see any text on screen at all? If not, the likely culprit is the startup-sequence. You can find out by holding both mousebuttons and boot without it. If you get a DOS prompt the hardware and...
Forum: News 13 December 2021, 21:56
Replies: 56
Views: 7,451
Posted By Photon
Great work, Toni. :) And new correct chipset...

Great work, Toni. :) And new correct chipset emulation is great news for everyone!

I haven't helped out at all with the Beta. It's just time pressure. Given time, I may be able to make good on...
Forum: Retrogaming General Discussion 13 December 2021, 21:52
Replies: 39
Views: 3,887
Posted By Photon
I voted 3-6 because 3 is the minimum on my...

I voted 3-6 because 3 is the minimum on my controllers for Amiga. The actual controller may have more buttons which I wire to up and down.

For retrogaming in general, I have many controllers, and...
Forum: support.Hardware 13 December 2021, 21:44
Replies: 45
Views: 3,819
Posted By Photon
Most of making this expansion work will require...

Most of making this expansion work will require Amiga electronics experience.

You can trace the DIN pins to find the voltages, and likely use an off-the-shelf PSU. Some sidecar expansions can also...
Forum: support.Games 13 December 2021, 21:32
Replies: 92
Views: 9,901
Posted By Photon
Just like arcade PCBs, it had some custom chips,...

Just like arcade PCBs, it had some custom chips, not general-purpose ones like in Amiga, but special-purpose for games, with pre-orchestrated functions and narrow limits.

These very...
Forum: Amiga scene 13 December 2021, 21:06
Replies: 19
Views: 1,616
Posted By Photon
Niklas, it's very difficult and expensive to do....

Niklas, it's very difficult and expensive to do. This is why no such computer has emerged in the last 30 years. Not only that, both the software to run and the OS must be completely restructured and...
Forum: Amiga scene 13 December 2021, 20:46
Replies: 36
Views: 5,163
Posted By Photon
This risks changing the topic from that of the...

This risks changing the topic from that of the original poster. Consider posting a separate thread for your use case. :great
Forum: Coders. Asm / Hardware 03 December 2021, 15:01
Replies: 8
Views: 1,846
Posted By Photon
Madness, but sort of expected madness. :D ...

Madness, but sort of expected madness. :D

This is the perfect place to moan about it! Then it gets fixed quick :great
Forum: Nostalgia & memories 03 December 2021, 14:44
Replies: 5
Views: 1,565
Posted By Photon
Good initiative :great I'll see if I can find...

Good initiative :great I'll see if I can find time to take some photos matching what your eyes experience.

I would recommend to take the photo from the intended viewing distance; very close-up...
Forum: Retrogaming General Discussion 03 December 2021, 14:31
Replies: 7
Views: 1,330
Posted By Photon
I think most if not all of the programmers making...

I think most if not all of the programmers making games for Amiga now were making games or demos in the 80s/90s. I think if you drop them an email they'll corroborate :great

Apple's app store is...
Forum: News 26 November 2021, 01:46
Replies: 86
Views: 16,273
Posted By Photon
Sad news. My best to those he left behind.

Sad news. My best to those he left behind.
Forum: Nostalgia & memories 22 November 2021, 15:42
Replies: 23
Views: 4,235
Posted By Photon
If it's an answer I have not less than 1500 DSDD...

If it's an answer I have not less than 1500 DSDD disks. :D In working order, these can fetch 1 USD/EUR/GBP per disk.

If they smell musty, there's a risk of mold, but if stored in cardboard boxes,...
Forum: Coders. Asm / Hardware 22 November 2021, 15:23
Replies: 8
Views: 1,475
Posted By Photon
All four bit operations to memory are byte-size. ...

All four bit operations to memory are byte-size.

bclr, bchg, and bset have a built-in btst, and can therefore be used for any kind of polling. :great
Forum: Coders. Asm / Hardware 12 November 2021, 23:26
Replies: 35
Views: 4,068
Posted By Photon
Post #6 is when Ross gave the same answer as I....

Post #6 is when Ross gave the same answer as I. Either will roll through the bits and supply the decision tree wishlisted into silicon as mentioned in my CSci comments directly related to the problem...
Forum: support.Hardware 12 November 2021, 23:11
Replies: 10
Views: 1,020
Posted By Photon
This. All your electronic components come from...

This. All your electronic components come from Asia. They are the best quality.

Apart from that, almost all electronics come from Asia, and they are the best quality. All the name brands you know...
Forum: Coders. Asm / Hardware 08 November 2021, 19:42
Replies: 35
Views: 4,068
Posted By Photon
Oh. So you had no answer. It seemed you found...

Oh. So you had no answer. It seemed you found something wrong with all the different suggestions. Well, now you have multiple smallest + fastest answers, so why not incorporate one into your code and...
Forum: Coders. Asm / Hardware 08 November 2021, 17:58
Replies: 35
Views: 4,068
Posted By Photon
So you have two answers. Plus all the...

So you have two answers. Plus all the alternatives.

Your competition/quiz has received many answers. Maybe contribute your answer now? Going on might be perceived as trolling by some.
Forum: support.AmigaOS 07 November 2021, 18:25
Replies: 31
Views: 2,071
Posted By Photon
You don't have to close threads, but you can...

You don't have to close threads, but you can request it. Normally only threads with fighting are closed though. :)

If you buy more memory, your closest retailer is ggsdata.se...
Forum: Coders. Asm / Hardware 06 November 2021, 20:52
Replies: 35
Views: 4,068
Posted By Photon
This code does that trick for your example input...

This code does that trick for your example input value in OP. :great

move.l d0,d1
subq.l #1,d1
and.l d0,d1
eor.l d1,d0

For the purpose of use with bfffo this can be reduced to

move.l d0,d1
Forum: support.AmigaOS 06 November 2021, 19:34
Replies: 31
Views: 2,071
Posted By Photon
I wanted to add that we are just asking you to do...

I wanted to add that we are just asking you to do temporary commandline stuff to help you with a fix, so you can use Workbench and some programs now.

You won't have to do commandline stuff after...
Forum: support.AmigaOS 06 November 2021, 19:19
Replies: 31
Views: 2,071
Posted By Photon
You interpret the Avail numbers like this: ...

You interpret the Avail numbers like this:

Total -> Maximum is the hardware memory that the Amiga sees at boot here. You have 1MB Chipmem and no Fastmem in the machine.

Total -> In-Use is what...
Forum: support.AmigaOS 06 November 2021, 17:19
Replies: 31
Views: 2,071
Posted By Photon
Oh. WB_2.x = DH0 in the instructions above. :great

Oh. WB_2.x = DH0 in the instructions above. :great
Forum: support.AmigaOS 06 November 2021, 16:55
Replies: 31
Views: 2,071
Posted By Photon
You can find out how much the A600 starts with...

You can find out how much the A600 starts with and how much is eaten by harddisk buffers:


Hold both mouse buttons on power-on. This starts the Early Boot menu.
Go Advanced Options... >...
Forum: New to Emulation or Amiga scene 06 November 2021, 16:45
Replies: 8
Views: 2,588
Posted By Photon
I recommend to buy a new PSU. Then you have...

I recommend to buy a new PSU. Then you have eliminated one source of uncertainty for many years.

I have PicoPSUs for my Amigas, but if I were buying more, I'd probably buy the c64psu.com PSUs....
Forum: Coders. Asm / Hardware 06 November 2021, 16:38
Replies: 8
Views: 1,475
Posted By Photon
The bit number is encoded correctly by the...

The bit number is encoded correctly by the Assembler. BTST memory accesses are 8-bit (.b). When the CPU encounters the $000e bit number, it ANDs it with 7.

Because of this, bit 6 is tested whether...
Forum: Coders. Asm / Hardware 06 November 2021, 16:32
Replies: 35
Views: 4,068
Posted By Photon
I think you are having trouble reading the...

I think you are having trouble reading the execution time in these examples? 4 branches LUT solution is somehow not OK because it uses 256b of memory, but 32 iteration branches are OK because the...
Forum: Coders. Asm / Hardware 06 November 2021, 02:53
Replies: 35
Views: 4,068
Posted By Photon
On 68000-68010, bit field operations are not...

On 68000-68010, bit field operations are not available. BFFFO is also unusable because it gives the highest bit and OP wants lowest bit.
Forum: Coders. Asm / Hardware 05 November 2021, 22:14
Replies: 35
Views: 4,068
Posted By Photon
You are performing a bitwise (non-atomic)...

You are performing a bitwise (non-atomic) operation, like a div. This makes it serial in nature, and this in itself requires a serial solution or a successive approximation (tree) solution. In some...
Forum: Coders. Asm / Hardware 05 November 2021, 21:27
Replies: 23
Views: 3,382
Posted By Photon
Assuming OCS this is true, although this doesn't...

Assuming OCS this is true, although this doesn't increase the horizontal chunky resolution, and impacts fillrate by leaving less CPU time to put an effect in the buffer.

To create a new realtime...
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