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Forum: Coders. Asm / Hardware Today, 11:12
Replies: 31
Views: 835
Posted By hooverphonique
I think you're on the right track - and if that's...

I think you're on the right track - and if that's the case it only works because the compiler can keep track of what happens with the stack pointer all the way through the code, and is also the...
Forum: Retrogaming General Discussion Yesterday, 15:19
Replies: 124
Views: 4,588
Posted By hooverphonique
looks like 320x200

looks like 320x200
Forum: Retrogaming General Discussion Yesterday, 12:13
Replies: 35
Views: 1,358
Posted By hooverphonique
Regarding 040 I'd think there's still a great...

Regarding 040 I'd think there's still a great deal of A4000/040 out there (which are still running an actual 040).
Forum: Coders. Asm / Hardware Yesterday, 11:49
Replies: 31
Views: 835
Posted By hooverphonique
You can think of them as pointers to longs...

You can think of them as pointers to longs instead of bytes. Thus their value can be any integer - 0 points to long number 0 (address 0), 1 points to long number 1 (address 4), and so on..
Forum: support.Hardware 25 February 2020, 15:00
Replies: 26
Views: 416
Posted By hooverphonique
Sneaky! :great

Sneaky! :great
Forum: support.Hardware 23 February 2020, 18:13
Replies: 2
Views: 122
Posted By hooverphonique
If they are 72pin SIMMs then yes..

If they are 72pin SIMMs then yes..
Forum: Coders. Asm / Hardware 21 February 2020, 16:42
Replies: 174
Views: 113,667
Posted By hooverphonique
Yes, you're right, and it's also where I arrived...

Yes, you're right, and it's also where I arrived at, hence the last part of my previous comment :)
Forum: Coders. Asm / Hardware 21 February 2020, 15:50
Replies: 174
Views: 113,667
Posted By hooverphonique
I stared at this for a while without seeing how...

I stared at this for a while without seeing how it would reset the flag (carry), but I suppose you meant "reset" in the sense of returning d0 to zero?
Forum: Amiga scene 20 February 2020, 22:19
Replies: 25
Views: 1,928
Posted By hooverphonique
I'm not familiar with the original Hang On, but...

I'm not familiar with the original Hang On, but somehow the melody reminds me of Irgendwie, Irgendwo, Irgendwann by Nena:
https://www.youtube.com/watch?v=oas5nAlfrwg
Forum: Hardware mods 14 February 2020, 18:10
Replies: 180
Views: 11,800
Posted By hooverphonique
Here's the correct link :) ...

Here's the correct link :)
https://www.mike-stirling.com/2020/02/fpga-accelerator-for-the-amiga-500/
Forum: Amiga scene 12 February 2020, 20:04
Replies: 513
Views: 51,099
Posted By hooverphonique
Yes, of course the clock difference (1%) is way...

Yes, of course the clock difference (1%) is way too small to make up for it. And with the same number of dma slots per line, it wouldn't even matter. Silly me :)
Forum: Amiga scene 12 February 2020, 17:43
Replies: 513
Views: 51,099
Posted By hooverphonique
But is a true NTSC machine not exactly as fast...

But is a true NTSC machine not exactly as fast (per frame) as a PAL machine?

If you switch a PAL machine to NTSC, the base clock of the system doesn't change, but a TRUE NTSC machine has higher...
Forum: Retrogaming General Discussion 10 February 2020, 12:51
Replies: 124
Views: 4,588
Posted By hooverphonique
You can clear about 3.3 MBps using the blitter...

You can clear about 3.3 MBps using the blitter (assuming no dma contention).


I'm not sure what you mean by 'composite of sprites and playfields that aren't bitplane', but you could restore the...
Forum: Amiga scene 04 February 2020, 11:10
Replies: 513
Views: 51,099
Posted By hooverphonique
I also noticed fragments/gfx garbage on the...

I also noticed fragments/gfx garbage on the stream.. It is quite noticable if you pay attention..
Forum: support.Hardware 29 January 2020, 14:18
Replies: 3
Views: 185
Posted By hooverphonique
Yes, SpeedRamsey is indeed twiddling the skip...

Yes, SpeedRamsey is indeed twiddling the skip bit. That ~18% increase looks right; IIRC the skip feature reduces memory access time from 5 to 4 cycles (-20%).
I doubt you would see anywhere near 18%...
Forum: support.Hardware 29 January 2020, 11:55
Replies: 3
Views: 185
Posted By hooverphonique
Basically, you need to use 1MB,2MB,4MB or 8MB...

Basically, you need to use 1MB,2MB,4MB or 8MB modules. With 2MB or 8MB, you can only use two modules at a time (1 in every second slot).
Using larger modules may work, but since they will have some...
Forum: Coders. Asm / Hardware 27 January 2020, 14:36
Replies: 9
Views: 439
Posted By hooverphonique
I wouldn't say that 'pairing' as described in the...

I wouldn't say that 'pairing' as described in the article is a 68000 concept; it's rather an artefact of the ST bus design
Forum: support.Hardware 24 January 2020, 18:42
Replies: 189
Views: 26,653
Posted By hooverphonique
Probably not - I think the pinout is wrong. I am...

Probably not - I think the pinout is wrong. I am not sure if you can get 2MB chipmem (total) with the A314 without using an A500+ mobo..
Forum: support.Hardware 24 January 2020, 12:34
Replies: 189
Views: 26,653
Posted By hooverphonique
The A314 works by 'replacing'/extending physical...

The A314 works by 'replacing'/extending physical ram in the machine with its own internal memory. Thus you will get the most out of it by disabling motherboard ram and let the A314 handle all of it.
Forum: support.WinUAE 23 January 2020, 15:04
Replies: 35
Views: 1,775
Posted By hooverphonique
It's not a NOP - it will read whatever was...

It's not a NOP - it will read whatever was leftover on the bus, and it with d5, then write the result to dmacon.
Forum: Coders. Asm / Hardware 22 January 2020, 15:10
Replies: 17
Views: 596
Posted By hooverphonique
It isn't about alignment/padding, but about only...

It isn't about alignment/padding, but about only considering the low byte when adding the numbers, which is useful if the index register contains other data.
I had a recent case where I needed to...
Forum: Coders. Asm / Hardware 22 January 2020, 12:27
Replies: 17
Views: 596
Posted By hooverphonique
The processor addresses frame relative to the...

The processor addresses frame relative to the address of the move instruction, i.e. an offset - this offset is always 16 bits and thus smaller than the full 32 bit address, i.e. a smaller resulting...
Forum: support.Apps 21 January 2020, 18:22
Replies: 19
Views: 952
Posted By hooverphonique
Interesting - I wasn't aware that DMA load would...

Interesting - I wasn't aware that DMA load would affect custom register access/interrupt latency when running code from fastram - or maybe I just didn't remember :D
Forum: support.Apps 20 January 2020, 22:03
Replies: 19
Views: 952
Posted By hooverphonique
That should only be the case on Amigas without...

That should only be the case on Amigas without fastram.
Forum: support.Games 17 January 2020, 12:30
Replies: 12
Views: 789
Posted By hooverphonique
:great :D:D

:great :D:D
Forum: support.Hardware 16 January 2020, 11:35
Replies: 6
Views: 499
Posted By hooverphonique
yes, buster takes care of communication between...

yes, buster takes care of communication between the zorro slots and the rest of the machine.
Forum: Retrogaming General Discussion 11 January 2020, 23:28
Replies: 5
Views: 743
Posted By hooverphonique
Yes. I think that's referred to as 'stencil...

Yes. I think that's referred to as 'stencil vector' in demoscene jargon.
Forum: Hardware mods 11 January 2020, 18:24
Replies: 29
Views: 6,620
Posted By hooverphonique
Romy compatibility is discussed in detail on page...

Romy compatibility is discussed in detail on page one of this thread.
Forum: Retrogaming General Discussion 11 January 2020, 18:02
Replies: 5
Views: 743
Posted By hooverphonique
Because the dithering can be had more or less for...

Because the dithering can be had more or less for free as part of the vector fill/copy process. The dither pattern is just a static image in memory and used when filling/copying.
Forum: support.Games 09 January 2020, 17:08
Replies: 115
Views: 15,309
Posted By hooverphonique
Is it just me, or does it say 'Ross 128b' in the...

Is it just me, or does it say 'Ross 128b' in the logo!? :D
Forum: support.Hardware 07 January 2020, 13:54
Replies: 31
Views: 999
Posted By hooverphonique
I don't think so.. A/B refers to the logic...

I don't think so.. A/B refers to the logic revision burned onto it by the Baseboard manufacturer, I'd assume.
Forum: Coders. Asm / Hardware 06 January 2020, 12:08
Replies: 33
Views: 1,242
Posted By hooverphonique
+1

+1
Forum: Coders. Asm / Hardware 04 January 2020, 23:57
Replies: 33
Views: 1,242
Posted By hooverphonique
As in 1 word after the address of the opcode...

As in 1 word after the address of the opcode (i.e. the same value as PC) ?
Forum: Coders. Asm / Hardware 04 January 2020, 23:49
Replies: 33
Views: 1,242
Posted By hooverphonique
Maybe a bit OT, but what does the asterisk mean?...

Maybe a bit OT, but what does the asterisk mean? Don't think I've seen that addressing mode before.
Forum: Hardware mods 03 January 2020, 18:15
Replies: 330
Views: 27,362
Posted By hooverphonique
If they're connected between a crystal pin and...

If they're connected between a crystal pin and GND, they're likely to be 22pF. Like shown here: https://www.electronics-tutorials.ws/oscillator/crystal.html
Forum: Coders. Asm / Hardware 03 January 2020, 16:26
Replies: 20
Views: 1,646
Posted By hooverphonique
Of course not - don't know why I was convinced of...

Of course not - don't know why I was convinced of that when I normally use 'vasmm68k_mot' :banghead :shocked :D
Forum: Coders. Asm / Hardware 03 January 2020, 14:37
Replies: 20
Views: 1,646
Posted By hooverphonique
You can switch syntax using command line flags -...

You can switch syntax using command line flags - no need for a different binary.

Edit: This is wrong, of course - don't know what I was thinking :-D
Forum: support.Hardware 03 January 2020, 14:34
Replies: 31
Views: 999
Posted By hooverphonique
mergemem won't work as there's at least 512kB of...

mergemem won't work as there's at least 512kB of free address space between those blocks.

and yes, that is a strange contraption indeed.
Forum: Coders. Asm / Hardware 03 January 2020, 00:10
Replies: 20
Views: 1,646
Posted By hooverphonique
Yeah, no assemblers I know of, support that. ...

Yeah, no assemblers I know of, support that.

The macros only "declare" the struct (actually just offsets to labels); you can't use them to instantiate it, because they are not really types which...
Forum: Coders. Asm / Hardware 30 December 2019, 12:40
Replies: 9
Views: 646
Posted By hooverphonique
Did you think about what you're trying to...

Did you think about what you're trying to achieve? I mean, why use "system takeover" if you actually want Workbench to be available while your program runs?
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