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Forum: Coders. Asm / Hardware 21 February 2020, 17:50
Replies: 16
Views: 852
Posted By meynaf
Argue for the sake of arguing, assuredly not. You...

Argue for the sake of arguing, assuredly not. You wrote something incorrect and i just pointed it. What is wrong in doing so ?



Why would i do that ? Nonsense.
But indeed, debugging C++ takes...
Forum: Coders. Asm / Hardware 21 February 2020, 15:26
Replies: 16
Views: 852
Posted By meynaf
I'm not missing the point. If you believe that...

I'm not missing the point. If you believe that one single page of C++ code is functionnally equivalent to a hundred pages of Asm, then you know neither.
The ratio is more like 2:1, maybe even less....
Forum: Coders. Asm / Hardware 21 February 2020, 14:06
Replies: 16
Views: 852
Posted By meynaf
How odd, i have exact opposite experience. I...

How odd, i have exact opposite experience.
I wanted to do an implementation of my asm framework in C++/DirectX and it failed.
So ok, i'm not doing 3D, but nevertheless.



Good luck for...
Forum: Retrogaming General Discussion 18 February 2020, 09:26
Replies: 83
Views: 2,822
Posted By meynaf
Xenon II ST intro music is 8khz 8 bit...

Xenon II ST intro music is 8khz 8 bit pre-rendered sample, while Amiga version appears to be kinda normal sound tracker music.
Thus the musician had more freedom, but less space (it's quite short).
Forum: Coders. Asm / Hardware 17 February 2020, 19:33
Replies: 16
Views: 639
Posted By meynaf
Now question is : what can happen if reset and...

Now question is : what can happen if reset and jmp are not in same longword.
From what i can guess, it could fail only if jmp is read from chip memory after reset instruction has changed cpu reset...
Forum: Coders. Asm / Hardware 17 February 2020, 16:37
Replies: 16
Views: 639
Posted By meynaf
Yes, burst mode fetches a complete cache line....

Yes, burst mode fetches a complete cache line. But - at least for 030 - the data does not need to be fully fetched before it gets used. And iirc the 4 longwords composing a cache line do not need to...
Forum: Coders. Asm / Hardware 17 February 2020, 11:34
Replies: 16
Views: 639
Posted By meynaf
Not for original Moto cpus. But Apollo 68080 (aka...

Not for original Moto cpus. But Apollo 68080 (aka vampire) did remove misaligned access penalties - and running an emulator at max speed probably also does.



The problem here is that only...
Forum: Retrogaming General Discussion 15 February 2020, 21:18
Replies: 15
Views: 630
Posted By meynaf
When connecting flags and roads, the game doesn't...

When connecting flags and roads, the game doesn't check that both are on your land. As a result, it becomes possible to link your terrain to your opponent's.
I don't think this can bring anything...
Forum: Retrogaming General Discussion 14 February 2020, 12:45
Replies: 57
Views: 2,312
Posted By meynaf
And all of this is for the cpu only. But the rest...

And all of this is for the cpu only. But the rest of the hardware also has to be taken into account.
As an example, Atari ST has 8Mhz 68000, Amiga 500 has 7.09Mhz 68000. So in theory the ST is...
Forum: Retrogaming General Discussion 14 February 2020, 09:51
Replies: 57
Views: 2,312
Posted By meynaf
While a lot faster than normal emulation, it's...

While a lot faster than normal emulation, it's still slower than native code.
It does however allow to execute the exact same benchmark program on both machines.



This kind of benchmark is...
Forum: Retrogaming General Discussion 13 February 2020, 10:45
Replies: 57
Views: 2,312
Posted By meynaf
One cannot tell cpu x is n times faster than cpu...

One cannot tell cpu x is n times faster than cpu y. It all depends on what said cpus are doing. F.e. it could be 10000 times faster for task a and 100 times faster for task b.
In the same way,...
Forum: Amiga scene 12 February 2020, 11:52
Replies: 29
Views: 2,769
Posted By meynaf
Care to show some code ? Perhaps other ppl could...

Care to show some code ? Perhaps other ppl could spot little speedups.
Forum: support.Other 11 February 2020, 11:27
Replies: 11
Views: 332
Posted By meynaf
The best way to preview Amiga samples is to play...

The best way to preview Amiga samples is to play them on the Amiga itself, with Amiga programs. On the PC you never know what is wrong.
Forum: Coders. Asm / Hardware 10 February 2020, 19:30
Replies: 6
Views: 1,000
Posted By meynaf
As the initialization part is hardly in the cache...

As the initialization part is hardly in the cache when called, i would aim for the shortest code. That is, use direct assignments until the overall size gets bigger than with using data.
Forum: Hardware mods 03 February 2020, 22:28
Replies: 180
Views: 12,871
Posted By meynaf
No. RISC-like has zero interest for a programmer...

No. RISC-like has zero interest for a programmer like me. Same with ARM thumb, which is already far behind the 68k in programmability (and even in pure code density).

I'm more thinking about the...
Forum: Hardware mods 03 February 2020, 21:13
Replies: 180
Views: 12,871
Posted By meynaf
Then why don't currently available accelerators...

Then why don't currently available accelerators suit your needs ?
Forum: Hardware mods 03 February 2020, 20:58
Replies: 180
Views: 12,871
Posted By meynaf
But the problem is precisely there. I see zero...

But the problem is precisely there. I see zero interest in adding programmer unfriendly stuff that's just targeted at speeding up a few selected things.
Wanna compete with vampire ? Do things...
Forum: Hardware mods 03 February 2020, 20:36
Replies: 180
Views: 12,871
Posted By meynaf
No, not SIMD. IMO this is the job of a GPU, not...

No, not SIMD. IMO this is the job of a GPU, not of a CPU.
I'm really thinking about general purpose additions to make progamming more pleasurable and enhance code density. This would in turn make...
Forum: Hardware mods 03 February 2020, 19:34
Replies: 180
Views: 12,871
Posted By meynaf
Do you plan doing such changes or will you always...

Do you plan doing such changes or will you always use unmodified TG68 ?
Enhancing programming flexibility has always interested me as asm coder.
Forum: Retrogaming General Discussion 01 February 2020, 13:02
Replies: 42
Views: 2,619
Posted By meynaf
Some point-n-click did use 256 colors for their...

Some point-n-click did use 256 colors for their aga version (simon the sorcerer, bloodnet...). Ishar trilogy in AGA version did, too.
Forum: support.Hardware 01 February 2020, 11:26
Replies: 3
Views: 350
Posted By meynaf
So if you boot with no startup sequence then it...

So if you boot with no startup sequence then it doesn't work, but if you boot normally then it does ?
In the early startup control you have two options to boot. What happens if you click on "Boot"...
Forum: Coders. Asm / Hardware 30 January 2020, 21:59
Replies: 11
Views: 437
Posted By meynaf
BLK is really neither DC (single constant) nor DS...

BLK is really neither DC (single constant) nor DS (define storage). It is a constant block (equivalent to DS if the constant value is 0).
For Devpac you can use DCB directive instead. Assemblers...
Forum: Coders. Asm / Hardware 30 January 2020, 10:39
Replies: 30
Views: 1,550
Posted By meynaf
Using the blitter may slow the cpu down. But as...

Using the blitter may slow the cpu down. But as disk dma slots are allocated regardless if they are used or not, there may be some interest in having them do something basically for free.



By...
Forum: Coders. Asm / Hardware 27 January 2020, 13:39
Replies: 9
Views: 441
Posted By meynaf
So basically this is kind of software OoO at...

So basically this is kind of software OoO at assembler level...

This is useless for pure 68000 as AFAIK it does not have instruction scheduling issues -- and other cpus of the family don't have...
Forum: support.Other 23 January 2020, 16:27
Replies: 7
Views: 407
Posted By meynaf
Total commander plugin only supports OFS/FFS. It...

Total commander plugin only supports OFS/FFS. It probably also only supports reading from hardfiles, not writing.
Forum: Coders. Asm / Hardware 22 January 2020, 19:11
Replies: 13
Views: 781
Posted By meynaf
movem.w from memory to registers always sign...

movem.w from memory to registers always sign extend (this can actually be useful).
If you want to restore only a word operand, use move instead of movem.
Forum: Nostalgia & memories 20 January 2020, 19:42
Replies: 47
Views: 2,660
Posted By meynaf
Try Atari ST version then :p The problem...

Try Atari ST version then :p

The problem with Lemmings is more the level design than the game itself. The mere concept is actually quite good.
But, while some levels are brilliant, needing...
Forum: Amiga scene 20 January 2020, 14:47
Replies: 174
Views: 24,091
Posted By meynaf
Alas this isn't the case. They use all the data...

Alas this isn't the case. They use all the data they can grab. They are even suspected of getting data on people who actually don't have an account...
Forum: support.Hardware 18 January 2020, 11:12
Replies: 21
Views: 1,265
Posted By meynaf
Exact same config worked before as it is today ?...

Exact same config worked before as it is today ? Maybe i read too fast then.
Anyway it's not suddenly but after a long time, so who knows. I can't tell, i'm not PSU specialist.
Forum: Coders. Asm / Hardware 16 January 2020, 13:26
Replies: 18
Views: 627
Posted By meynaf
There is an audio intreq not only when a sample...

There is an audio intreq not only when a sample starts playing, but also when it stops.
Forum: support.Apps 16 January 2020, 11:10
Replies: 31
Views: 1,292
Posted By meynaf
The situation is more or less the same as on real...

The situation is more or less the same as on real HW... Why would it differ ?
Forum: support.Apps 16 January 2020, 10:57
Replies: 31
Views: 1,292
Posted By meynaf
Not exactly with no signals, no. When the virus...

Not exactly with no signals, no.
When the virus replicates it has to write on disk.
Thus unusual disk activity should catch your attention. This is the way i detected ebola 2 back in '97. Then...
Forum: support.Apps 15 January 2020, 15:25
Replies: 9
Views: 385
Posted By meynaf
This indicates the program doesn't accept being...

This indicates the program doesn't accept being run from Workbench.
As DamienD pointed, the solution is to make a script.
You can eventually give an icon to that script, and then use "IconX" as...
Forum: support.Hardware 15 January 2020, 09:11
Replies: 21
Views: 1,265
Posted By meynaf
The PSU may be fine but just too weak for the...

The PSU may be fine but just too weak for the config.
Booting with Blizzard but no HDD would tell more. You may also try to unplug all floppy drives and see if it makes the situation better.
Forum: Coders. Asm / Hardware 10 January 2020, 14:47
Replies: 35
Views: 1,174
Posted By meynaf
This is because the PC never actually gives you...

This is because the PC never actually gives you access to the real front buffer.
Forum: Coders. Asm / Hardware 10 January 2020, 13:42
Replies: 35
Views: 1,174
Posted By meynaf
RTG is made to handle cheap PC hardware put into...

RTG is made to handle cheap PC hardware put into a miggy. So it works like PC stuff (= in a stupid way).



You can't use the Copper on a CGX screen.
Remember, all these boards which use RTG...
Forum: Coders. Asm / Hardware 10 January 2020, 10:12
Replies: 35
Views: 1,174
Posted By meynaf
The problem with RTG is that it doesn't have the...

The problem with RTG is that it doesn't have the flexibility of original hardware. You can not just open your screen, grab the bitplanes address (that is permanently valid) and then do whatever you...
Forum: Coders. Asm / Hardware 06 January 2020, 12:49
Replies: 22
Views: 1,626
Posted By meynaf
I remember hearing some junk on mods that use...

I remember hearing some junk on mods that use notes between 28 and 31 khz. It is not PT player weirdness because some tfmx (from games dragonflight and amberstar) also did this.
But it was random....
Forum: Coders. Asm / Hardware 06 January 2020, 09:49
Replies: 33
Views: 1,243
Posted By meynaf
We're seeing here a shortcoming of 68k asm...

We're seeing here a shortcoming of 68k asm syntax.
If instead of 2(pc) we could have writen something like (pc+2) then it would have ceased to be ambiguous - we would have been able to write either...
Forum: Coders. Asm / Hardware 03 January 2020, 17:29
Replies: 20
Views: 1,650
Posted By meynaf
Something like this : init_copinfo macro ...

Something like this :

init_copinfo macro
dc.w \1
dc.l \2
dc.w \3
endm

CopperInfo1: init_copinfo MyCopperListSize,MyCopperListHandler,0
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