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Forum: Nostalgia & memories Yesterday, 23:41
Replies: 80
Views: 6,953
Posted By NorthWay
The sad thing was straight ST ports with side...

The sad thing was straight ST ports with side panels. They _could_ have been done with hw sprites, but usually you got the ST code, warts and all. (So no hw scroll etc.)
Forum: Retrogaming General Discussion 19 August 2019, 15:30
Replies: 38
Views: 1,150
Posted By NorthWay
There was some math involved in Marble Madness...

There was some math involved in Marble Madness IIRC from a talk by the designer (youtube of course).
Forum: Amiga scene 18 August 2019, 20:22
Replies: 784
Views: 37,010
Posted By NorthWay
It is complicated in that you need to keep track...

It is complicated in that you need to keep track of bobs and where they overlap. That will cost some cpu time. (Or if you can design it so bobs never overlap you can simplify it a lot.)

And you...
Forum: Amiga scene 18 August 2019, 08:56
Replies: 784
Views: 37,010
Posted By NorthWay
No? What's your definition of "remove and...

No? What's your definition of "remove and restore"?

If you trade some cpu time and chipmem you can more or less get rid of the "restore" part:
I'm assuming you're double-buffering (so 2 buffers...
Forum: Nostalgia & memories 17 August 2019, 20:09
Replies: 8
Views: 445
Posted By NorthWay
Galactic was fantastic, but also total WTF. It...

Galactic was fantastic, but also total WTF. It was dazzling to watch.
Forum: Amiga scene 17 August 2019, 19:50
Replies: 784
Views: 37,010
Posted By NorthWay
I don't think the designers thought it properly...

I don't think the designers thought it properly through.
Or rather, I'm guessing they expected you to brute-force stuff with the blitter for screen updates. Remember how the design goal was for...
Forum: Hardware mods 17 August 2019, 07:44
Replies: 79
Views: 8,241
Posted By NorthWay
Can you buy new replacements? Why not go for that...

Can you buy new replacements? Why not go for that if it is an improvement? (Space, or heat, or whatever.)
Stuff that needs to come from dead or NOS: Can it be socketed?

But who am I to command......
Forum: Coders. Asm / Hardware 14 August 2019, 21:20
Replies: 95
Views: 5,755
Posted By NorthWay
BTW, this should also be possible to shuffle the...

BTW, this should also be possible to shuffle the logic on so you have an early exit if either is bigger than the added radius.
And you can do a branch-free ABS() in something like 3 instructions,...
Forum: Coders. Asm / Hardware 14 August 2019, 20:51
Replies: 166
Views: 99,336
Posted By NorthWay
I found this reference to it:...

I found this reference to it: https://courses.cs.washington.edu/courses/cse501/15sp/papers/massalin.pdf
Forum: Coders. Asm / Hardware 12 August 2019, 23:54
Replies: 95
Views: 5,755
Posted By NorthWay
I wasn't meant to assume anything much - you can...

I wasn't meant to assume anything much - you can muddle the radius for objects if you want to allow some overlap without triggering as hitting each other.


Also, on a grid any object can occupy 4...
Forum: Coders. Asm / Hardware 12 August 2019, 12:35
Replies: 95
Views: 5,755
Posted By NorthWay
Can't you do bounding box with...

Can't you do bounding box with min(abs(x_center-x_box_center),abs(y_center-y_box_center)) < (radius+box_radius)
Forum: Nostalgia & memories 05 August 2019, 03:29
Replies: 25
Views: 1,228
Posted By NorthWay
I thought the point of a laser hole would be to...

I thought the point of a laser hole would be to create a weak bit that would give differing results on multiple reads? It would of course also mess up writes.
Forum: News 05 August 2019, 03:19
Replies: 55
Views: 9,571
Posted By NorthWay
It ends with the end of Commodore basically, and...

It ends with the end of Commodore basically, and doesn't say much about any leftovers.
I still wonder if any hardware design files survived.
Forum: News 01 August 2019, 19:05
Replies: 71
Views: 5,569
Posted By NorthWay
Cool stuff, but I'm still looking for something...

Cool stuff, but I'm still looking for something that can be in-circuit(?) updated. (And for my A4000D.)
Forum: Amiga scene 27 July 2019, 16:47
Replies: 784
Views: 37,010
Posted By NorthWay
It should _always_ save 1/4th if you can use the...

It should _always_ save 1/4th if you can use the (rather safe) assumption that a chunky pixel with all bits clear means select source instead of bob. If you want something ZX Spectrum like with a...
Forum: Amiga scene 20 July 2019, 17:29
Replies: 784
Views: 37,010
Posted By NorthWay
Heck yea, I want AAA even as my grumpy old...

Heck yea, I want AAA even as my grumpy old bastard self.
I even tinkered a bit with the Verilog of the Minimig to try to add in a Blipper as AAA does.
Forum: Amiga scene 19 July 2019, 21:09
Replies: 784
Views: 37,010
Posted By NorthWay
Wasn't AAA designed for multiple memory layouts?...

Wasn't AAA designed for multiple memory layouts? From simple DRAM to multiple VRAM? Something like (at least) 4x difference in bandwidth?
Forum: Coders. Asm / Hardware 18 July 2019, 01:44
Replies: 38
Views: 1,451
Posted By NorthWay
AGA 32/64 bit access is nothing more than the old...

AGA 32/64 bit access is nothing more than the old OCS timing slot widened to 32 bits and cut in two parts that faster ram chips can deliver back-to-back (they have to be consecutive).
The cpu can do...
Forum: Amiga scene 07 July 2019, 03:37
Replies: 29
Views: 3,550
Posted By NorthWay
Too bad you can't buy a Replay yet, I've only...

Too bad you can't buy a Replay yet, I've only been waiting for 5(?) years now.
Forum: support.Hardware 07 July 2019, 03:31
Replies: 9
Views: 669
Posted By NorthWay
Do you want to run Enforcer&friends? If no,...

Do you want to run Enforcer&friends?
If no, then go for a Vampire.
Forum: Amiga scene 14 June 2019, 00:44
Replies: 32
Views: 4,011
Posted By NorthWay
Thanks for the info. After staring into the air...

Thanks for the info.
After staring into the air for a while I finally realized that for the first time in I don't know how long, I am envious of you/Hese for having something I want but can't have...
Forum: Amiga scene 12 June 2019, 20:09
Replies: 32
Views: 4,011
Posted By NorthWay
BTW, how hard was it to find the DSP? Have you...

BTW, how hard was it to find the DSP? Have you found a source for them?
Forum: Amiga scene 12 June 2019, 13:33
Replies: 32
Views: 4,011
Posted By NorthWay
Do you see any signs of life from the DSP when...

Do you see any signs of life from the DSP when operating your 3000? Is there a separate rom for the DSP, or does the 3000 upload everything for it? Does the DSP have a 16-bit DAC? Does it mix sound...
Forum: Hardware mods 10 June 2019, 21:34
Replies: 49
Views: 7,650
Posted By NorthWay
Wasn't the DSP meant to have some input/output...

Wasn't the DSP meant to have some input/output connectors? At least sound?
And perhaps a connector for sound mixing with a CD-ROM.

(Ahem... and make it an ATX form factor? Shut up and take my...
Forum: Coders. Asm / Hardware 09 June 2019, 18:52
Replies: 18
Views: 1,332
Posted By NorthWay
BTW, I think BAsm lets you set temp/trash...

BTW, I think BAsm lets you set temp/trash registers for its optimizer IIRC. Just saying.
(And again, anyone know what happened to the ca 1990 GNU Superoptimizer?)
Forum: Retrogaming General Discussion 25 May 2019, 22:22
Replies: 191
Views: 12,664
Posted By NorthWay
Sure, but you don't have to draw N bitplanes of...

Sure, but you don't have to draw N bitplanes of road (though that could simplify handling of setting/clearing pixels as there would be no "dirty" rectangles).

(Ah, the things you would get for...
Forum: Retrogaming General Discussion 25 May 2019, 20:25
Replies: 191
Views: 12,664
Posted By NorthWay
BTW, to talk tech solutions, my idea for the road...

BTW, to talk tech solutions, my idea for the road routine (not the part above the horizon) is
- init background to green (left/right side colour)
- copperwait left curb horizontal position (modulo...
Forum: Coders. Asm / Hardware 23 May 2019, 16:52
Replies: 45
Views: 3,627
Posted By NorthWay
Best case I'd say you can use the Copper to...

Best case I'd say you can use the Copper to replicate a Blipper. At least as long as all your blitter operations can be executed twice without side effects:
Set COP1LC to a list to do standard...
Forum: Coders. Asm / Hardware 23 May 2019, 00:05
Replies: 88
Views: 4,008
Posted By NorthWay
Two things -It should never have been named...

Two things
-It should never have been named "cnop". That kinda ties you to the mast on what you expect it to do.
-I agree that $4AFC is a better pick.
Forum: Coders. Asm / Hardware 17 May 2019, 16:29
Replies: 10
Views: 846
Posted By NorthWay
Asm-Pro, Asm-One and whatnot are, AFAIK,...

Asm-Pro, Asm-One and whatnot are, AFAIK, non-authorized hacks of the K-Seka assembler. Might not be much left of the original, much as my grandfather's beautiful axe that my father replaced the blade...
Forum: support.Hardware 10 May 2019, 17:50
Replies: 27
Views: 1,242
Posted By NorthWay
Got a link to somewhere to buy that online? I...

Got a link to somewhere to buy that online?
I tried the parent site of the pic but got lost in too much data and not knowing exactly what to search for.
Forum: Coders. General 10 May 2019, 16:37
Replies: 15
Views: 2,517
Posted By NorthWay
I had a think about this a while back and came to...

I had a think about this a while back and came to the obvious solution:

You take your original picture, pick whatever is largest of width(X) or height(Y) (call that N), scale N up to the closest...
Forum: Nostalgia & memories 10 May 2019, 16:16
Replies: 3
Views: 685
Posted By NorthWay
Los Gatos "Ranger" updated chipset. Some say it...

Los Gatos "Ranger" updated chipset. Some say it never was, Jay Miner said something else.
ECS UHRES(VRAM?) support in the register list. (Is this the Ranger stuff?)
AAA chipset - any hw design...
Forum: Retrogaming General Discussion 07 May 2019, 12:36
Replies: 69
Views: 7,332
Posted By NorthWay
There was like 3 seconds or so of the actual...

There was like 3 seconds or so of the actual game. If that is representative then I saw a game that was redrawing 1/3rd of the screen and making perfect use of the screenmode that has "any colour any...
Forum: Coders. Asm / Hardware 03 May 2019, 19:29
Replies: 20
Views: 711
Posted By NorthWay
One more try .odd moveq #0,d0 ...

One more try

.odd
moveq #0,d0
move.b (a0)+,d0
lsl.w #3,d0
move.l LUT+0(pc,d0.w),(a1)+
move.l LUT+4(pc,d0.w),(a1)+
...
.even
Forum: Coders. Asm / Hardware 03 May 2019, 18:48
Replies: 20
Views: 711
Posted By NorthWay
Nah, forget this - I thought it would be 256K...

Nah, forget this - I thought it would be 256K table and not 1M. Just letting this stand to show that scaling it up isn't a good idea.

Ok, we up the odds again then :-)
Same as before, two code...
Forum: Coders. Asm / Hardware 03 May 2019, 16:54
Replies: 20
Views: 711
Posted By NorthWay
I'll go over this later tonight, but roughly...

I'll go over this later tonight, but roughly something like

move.b (a0)+,d0
moveq #$f,d1
and.l d0,d1
eor.l d1,d0
move.l .sparselut(pc,d0.w),(a1)+
add.w d1,d1
add.w d1,d1
move.l...
Forum: Coders. Asm / Hardware 27 April 2019, 05:51
Replies: 166
Views: 99,336
Posted By NorthWay
[lsl #8] My personal preference is to start the...

[lsl #8]
My personal preference is to start the program with "clr.l -(sp)" and match it before end with "move.l (sp)+,d0", and then use pairs of
move.b dX,(sp)
move.w (sp),dX
Forum: support.Hardware 25 April 2019, 18:38
Replies: 100
Views: 9,233
Posted By NorthWay
So you have taken an interesting idea and run...

So you have taken an interesting idea and run with it. Can I ask your opinion on something I have tried "shopping around" many many years back:
Could you imagine an A4000 cpu card with a connector...
Forum: Retrogaming General Discussion 14 April 2019, 10:02
Replies: 6,038
Views: 1,034,340
Posted By NorthWay
m.2 disk for my PC. Somehow all the SSD...

m.2 disk for my PC. Somehow all the SSD connectors are in use, but the m.2 one was free so I got myself one. I need to de-clutter my files and free some disks...
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