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Forum: Retrogaming General Discussion Today, 16:14
Replies: 34
Views: 1,622
Posted By DanScott
There's a few Core titles that were in...

There's a few Core titles that were in development and got canned / lost in time...

For example, the original prototype of Chuck Rock 2 (before I started work on the final version) that was...
Forum: Coders. Asm / Hardware 25 June 2022, 21:13
Replies: 19
Views: 846
Posted By DanScott
Looks great!!! No need to spend more time on it :D

Looks great!!! No need to spend more time on it :D
Forum: Coders. Asm / Hardware 25 June 2022, 15:13
Replies: 19
Views: 846
Posted By DanScott
If it's just vertical scrolling, you can easily...

If it's just vertical scrolling, you can easily calculate the large areas of the foreground that can be blitted with D=A blit... only the edge areas would need proper masking.

In De Profundis, I...
Forum: Coders. General 20 June 2022, 23:16
Replies: 80
Views: 25,799
Posted By DanScott
I'm wondering if it might be more efficient to...

I'm wondering if it might be more efficient to plot a pixel with the blitter in 6bpl ?
Forum: Nostalgia & memories 13 June 2022, 11:37
Replies: 58
Views: 3,478
Posted By DanScott
Looks like a PS2 game (in terms of graphics...

Looks like a PS2 game (in terms of graphics quality)
Forum: Retrogaming General Discussion 08 June 2022, 20:04
Replies: 32
Views: 1,636
Posted By DanScott
Mega Typhoon

Mega Typhoon
Forum: Nostalgia & memories 08 June 2022, 19:33
Replies: 58
Views: 3,478
Posted By DanScott
Ah, the guy who made money by selling our...

Ah, the guy who made money by selling our demos.....
Forum: Amiga scene 31 May 2022, 15:46
Replies: 12
Views: 3,662
Posted By DanScott
if you've never coded 68k before, or any Amiga...

if you've never coded 68k before, or any Amiga hardware stuff, there's a LOT of learning to be done before you can even think about making a text scroller yourself.
Forum: Retrogaming General Discussion 26 May 2022, 23:14
Replies: 2
Views: 479
Posted By DanScott
They probably had a custom bootblock writer, that...

They probably had a custom bootblock writer, that would write a unique serial number whenever they made a preview copy for magazine reviews/previews etc... that way they could trace the number back...
Forum: Nostalgia & memories 18 May 2022, 16:06
Replies: 62
Views: 8,612
Posted By DanScott
My original A500 is in several pieces and needs...

My original A500 is in several pieces and needs binning! Chicken Lips.. Serial Numer 32627
Forum: Retrogaming General Discussion 12 May 2022, 18:50
Replies: 11
Views: 777
Posted By DanScott
It's a fact!

It's a fact!
Forum: Retrogaming General Discussion 12 May 2022, 13:55
Replies: 11
Views: 777
Posted By DanScott
The coder of this dropped dead of a heart attack...

The coder of this dropped dead of a heart attack a few years ago in my friends kitchen one morning!
Forum: Nostalgia & memories 28 April 2022, 20:01
Replies: 3
Views: 673
Posted By DanScott
I can remember watching that when it was first...

I can remember watching that when it was first broadcast. Mind blowing for the time, given that the majority of us were using Speccies and C64's around that time!

I seem to remember around the...
Forum: Nostalgia & memories 25 April 2022, 20:49
Replies: 32
Views: 3,463
Posted By DanScott
Looking at a video of the coinop on Youtube right...

Looking at a video of the coinop on Youtube right now....

Interestingly, although the game scrolls at 50/60, the sprites appear to update at 25/30

This is particularly noticeable on the moving...
Forum: Coders. Asm / Hardware 20 April 2022, 18:46
Replies: 9
Views: 1,403
Posted By DanScott
seems you need to wait 8 pixels earlier, that's...

seems you need to wait 8 pixels earlier, that's all
Forum: Amiga scene 14 April 2022, 21:20
Replies: 36
Views: 5,140
Posted By DanScott
aklang is more "modular" in the way sounds are...

aklang is more "modular" in the way sounds are created, in that the outputs of previous operators can become the inputs of subsequent operators.

Yes, it does require quite a good knowledge of how...
Forum: Coders. Asm / Hardware 07 April 2022, 22:08
Replies: 3
Views: 781
Posted By DanScott
Yes, you could do a D=A blit, but disable the A...

Yes, you could do a D=A blit, but disable the A DMA channel, and put a 16bit value into BLTADAT, and it would fill with that value
Forum: Coders. Asm / Hardware 31 March 2022, 23:46
Replies: 41
Views: 3,667
Posted By DanScott
VBR ? Do you have the value of the VBR? This...

VBR ?

Do you have the value of the VBR? This needs to be passed to the player init
Forum: Coders. Asm / Hardware 24 March 2022, 23:58
Replies: 9
Views: 1,410
Posted By DanScott
Use a CIA timer... this is independent of CPU...

Use a CIA timer... this is independent of CPU clock speed.

There should be some examples in the coder forum here somewhere :)
Forum: Amiga scene 22 March 2022, 14:30
Replies: 50
Views: 5,581
Posted By DanScott
Nobody knows exactly.. but probably some blokes...

Nobody knows exactly.. but probably some blokes arse that was flashed in one of the wild-compo videos
Forum: Retrogaming General Discussion 16 March 2022, 13:13
Replies: 27
Views: 3,391
Posted By DanScott
I have a special feature that can be used to see...

I have a special feature that can be used to see if a game/program runs at 50/25FPS... it's my eyes.. I can see right away if a games is 50fps or 25fps, and can also detect 25fps sprite update on a...
Forum: Retrogaming General Discussion 14 March 2022, 23:06
Replies: 33
Views: 2,148
Posted By DanScott
Hybris, Battle Squadron, Mega Typhoon!!!!

Hybris, Battle Squadron, Mega Typhoon!!!!
Forum: Coders. Asm / Hardware 06 March 2022, 00:31
Replies: 22
Views: 2,763
Posted By DanScott
Wild guess here, and no dev setup here to try,...

Wild guess here, and no dev setup here to try, but can it be done with constantly setting DDFSTART and DDFSTOP across the screen into narrow strips? Assuming modulo is added at DDFSTOP each time (not...
Forum: Coders. Asm / Hardware 24 February 2022, 14:31
Replies: 32
Views: 2,390
Posted By DanScott
Modulo needs adjusting depending on BLTSIZE...

Modulo needs adjusting depending on BLTSIZE width...
Forum: Amiga scene 23 February 2022, 19:02
Replies: 50
Views: 5,581
Posted By DanScott
https://2022.revision-party.net/

https://2022.revision-party.net/
Forum: Coders. Asm / Hardware 23 February 2022, 18:54
Replies: 32
Views: 2,390
Posted By DanScott
No, not true.. a 16 pixel wide object blitted...

No, not true.. a 16 pixel wide object blitted without any shifting, can use a width of 1 word in BLTSIZE

and (for example) a 24 pixel wide object (with a BLTSIZE of 2 words), could be shifted from...
Forum: Coders. Asm / Hardware 23 February 2022, 17:29
Replies: 32
Views: 2,390
Posted By DanScott
You usually have to have an extra word to shift...

You usually have to have an extra word to shift into, so if the source image is 16 pixels (1 word) wide, your blitsize width will be 2 words.

This only applies if you are shifting (for example...
Forum: Retrogaming General Discussion 17 February 2022, 16:49
Replies: 399
Views: 75,319
Posted By DanScott
Yeah that's possible, but incurs some penalty. ...

Yeah that's possible, but incurs some penalty.

Every blit you do, the width of the blit has an extra word (16 pixels for shifting into)

So if you had an object that was originally 64 pixels...
Forum: Retrogaming General Discussion 17 February 2022, 12:07
Replies: 399
Views: 75,319
Posted By DanScott
But you end up with one of 2 side effects: ...

But you end up with one of 2 side effects:

1) The object just switches off (often before the road markings)

or

2) The object stops scaling and appears then to just "scroll" off the...
Forum: Retrogaming General Discussion 16 February 2022, 23:57
Replies: 399
Views: 75,319
Posted By DanScott
Yeah it wasn't a great game overall in terms of...

Yeah it wasn't a great game overall in terms of playability, but technically, it was pretty decent for the time
Forum: Retrogaming General Discussion 16 February 2022, 23:55
Replies: 399
Views: 75,319
Posted By DanScott
I've investigated lots of methods of realtime...

I've investigated lots of methods of realtime bitmap scaling in various demos that I've worked on, and I can say for sure, there's no way on an A500, that you could implement any kind of real-time...
Forum: Coders. Asm / Hardware 12 February 2022, 19:41
Replies: 293
Views: 276,981
Posted By DanScott
The internet destroyed our innocence :D

The internet destroyed our innocence :D
Forum: Coders. Asm / Hardware 12 February 2022, 18:12
Replies: 293
Views: 276,981
Posted By DanScott
Is this like "crossing the streams" ??...

Is this like "crossing the streams" ?? :D
Forum: Amiga scene 12 February 2022, 17:34
Replies: 51
Views: 4,967
Posted By DanScott
Hybris for 1988... and Centrefold Squares :D ...

Hybris for 1988... and Centrefold Squares :D

Actually, 1988 wasn't a bad year for games... Dungeon Master too, and lots of others I remember
Forum: Retrogaming General Discussion 09 February 2022, 23:52
Replies: 106
Views: 7,110
Posted By DanScott
Carver is a pretty bad game.. but hey, maybe the...

Carver is a pretty bad game.. but hey, maybe the programmer and artist were just a couple of guys that really wanted to (had a dream to) make a game, even though their skills were not quite up to...
Forum: Retrogaming General Discussion 30 January 2022, 22:54
Replies: 19
Views: 1,322
Posted By DanScott
He means the coin op has an 8 bit processor (well...

He means the coin op has an 8 bit processor (well 2 actually.. both Z80's, although one might be driving the 2 audio chips), but this is partly irrelevant when the coin op display hardware itself is...
Forum: Retrogaming General Discussion 30 January 2022, 16:18
Replies: 19
Views: 1,322
Posted By DanScott
I'd have to disagree with you here. The graphics...

I'd have to disagree with you here. The graphics are probably the most accurate to be found in any US Gold port, and the artist has done a great job with the palette, considering this had to be a...
Forum: Retrogaming General Discussion 29 January 2022, 20:47
Replies: 19
Views: 1,322
Posted By DanScott
Such a shame this game turned out to be a...

Such a shame this game turned out to be a stuttery pile of unplayable low framerate crap... because the graphics are actually pretty well converted from the coin-op to a 16 colour Atari ST palette....
Forum: Coders. Asm / Hardware 28 January 2022, 01:51
Replies: 13
Views: 1,675
Posted By DanScott
Multiply by 17 moves the 4 bit scroll value into...

Multiply by 17 moves the 4 bit scroll value into the right places to scroll both odd and even planes. Lookup would probably be quicker
Forum: Coders. Asm / Hardware 28 January 2022, 01:50
Replies: 13
Views: 1,675
Posted By DanScott
You have to increase DDFSTART and DDFSTOP, and...

You have to increase DDFSTART and DDFSTOP, and use DIW to 'mask' these areas.. Or use sprites to mask if possible
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