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Search: Posts Made By: DanScott
Forum: Coders. Asm / Hardware 23 January 2020, 13:49
Replies: 13
Views: 586
Posted By DanScott
Don't think I ever actually used an ext.l after a...

Don't think I ever actually used an ext.l after a movem ever... but it's a handy trick to know for any future implementations
Forum: Amiga scene 23 January 2020, 11:23
Replies: 17
Views: 759
Posted By DanScott
:crazy:spin:crazy

:crazy:spin:crazy
Forum: Amiga scene 23 January 2020, 10:53
Replies: 17
Views: 759
Posted By DanScott
I know where the UK event will be held, but not...

I know where the UK event will be held, but not allowed to say anything yet until it's fully confirmed
Forum: Coders. Asm / Hardware 22 January 2020, 18:51
Replies: 13
Views: 586
Posted By DanScott
Yes, word reads from stack to register are sign...

Yes, word reads from stack to register are sign extended to a long
Forum: Coders. General 22 January 2020, 00:05
Replies: 19
Views: 1,434
Posted By DanScott
Somehow I'm not convinced it is....

Somehow I'm not convinced it is....
Forum: Amiga scene 21 January 2020, 15:55
Replies: 16
Views: 669
Posted By DanScott
Quite a bit of bullshit spouted on that first...

Quite a bit of bullshit spouted on that first page however....
Forum: Coders. General 20 January 2020, 23:53
Replies: 19
Views: 1,434
Posted By DanScott
What spec Amiga is that video captured from ?

What spec Amiga is that video captured from ?
Forum: Retrogaming General Discussion 20 January 2020, 23:51
Replies: 29
Views: 1,129
Posted By DanScott
You could not have been playing it on the Amiga...

You could not have been playing it on the Amiga then, as there's no way you 'd forget how utterly terrible it was :D :D
Forum: Coders. General 19 January 2020, 16:19
Replies: 9
Views: 386
Posted By DanScott
We actually acquired the official Choplifter...

We actually acquired the official Choplifter license at Core Design in around 1991/1992, but the project got shelved at some point.
Forum: Coders. General 19 January 2020, 11:47
Replies: 4
Views: 216
Posted By DanScott
Thanks!!! That's perfect :great :great

Thanks!!! That's perfect :great :great
Forum: Coders. General 18 January 2020, 23:44
Replies: 4
Views: 216
Posted By DanScott
DOS / Windows Util to split Protrack MOD into song & sample files

Does anyone have a compiled windows or dos exe, that can split a protracker module into 2 files (one file with the song / pattern data to load into fast ram, and the other file with the samples to...
Forum: Coders. General 18 January 2020, 21:09
Replies: 9
Views: 386
Posted By DanScott
320 pixels wide = 40 bytes per plane... so...

320 pixels wide = 40 bytes per plane...

so memory usage is 40 * 256 *5 = 51200 bytes :)
Forum: Coders. Asm / Hardware 17 January 2020, 17:04
Replies: 13
Views: 611
Posted By DanScott
Might want to look at Kalms ADPCM stuff ...

Might want to look at Kalms ADPCM stuff

https://github.com/Kalmalyzer/adpcm-68k
Forum: Coders. Blitz Basic 15 January 2020, 01:57
Replies: 28
Views: 2,963
Posted By DanScott
$24

$24
Forum: Coders. Asm / Hardware 14 January 2020, 12:15
Replies: 21
Views: 872
Posted By DanScott
In "De Profundis" on the roto-zoom,it uses...

In "De Profundis" on the roto-zoom,it uses combinations of SKIPs and COPJMP's to create loops... it repeats each line of moves, 4 times
Forum: Nostalgia & memories 13 January 2020, 21:27
Replies: 53
Views: 2,627
Posted By DanScott
my first thought too :D ...

my first thought too :D

https://www.pouet.net/prod.php?which=12454
Forum: Retrogaming General Discussion 11 January 2020, 23:55
Replies: 5
Views: 633
Posted By DanScott
Dithering is probably a little slower than just...

Dithering is probably a little slower than just solid shading due to the small amount of extra calculation that is required for the "mask"... however it can be used to give the impression of more...
Forum: Coders. Asm / Hardware 11 January 2020, 14:41
Replies: 35
Views: 941
Posted By DanScott
Not in the slightest. You need to learn the...

Not in the slightest. You need to learn the definition of Trolling.

This discussion has nothing to do with the original Amiga chipset. It belongs somewhere else.
Forum: Coders. Asm / Hardware 11 January 2020, 01:12
Replies: 35
Views: 941
Posted By DanScott
Coders. Asm / Hardware Program the Classic...

Coders. Asm / Hardware
Program the Classic Amiga chipsets and 68000 family CPUs directly, using Assembler
Forum: Coders. Asm / Hardware 10 January 2020, 22:43
Replies: 35
Views: 941
Posted By DanScott
Can this thread be moved out to the correct forum...

Can this thread be moved out to the correct forum ???
Forum: Nostalgia & memories 08 January 2020, 22:58
Replies: 43
Views: 1,555
Posted By DanScott
Or perhaps ask him to read the source code out...

Or perhaps ask him to read the source code out line by line (like an audio book)
Forum: Retrogaming General Discussion 07 January 2020, 15:14
Replies: 62
Views: 2,895
Posted By DanScott
If only it was THAT easy :D :D

If only it was THAT easy :D :D
Forum: Retrogaming General Discussion 07 January 2020, 11:46
Replies: 62
Views: 2,895
Posted By DanScott
The Amiga OCS showed what was possible in 1983!

The Amiga OCS showed what was possible in 1983!
Forum: Nostalgia & memories 05 January 2020, 20:04
Replies: 13
Views: 622
Posted By DanScott
The C64 version is pretty good too!

The C64 version is pretty good too!
Forum: Nostalgia & memories 05 January 2020, 02:24
Replies: 16
Views: 585
Posted By DanScott
I'm going to be slightly controversial here.. but...

I'm going to be slightly controversial here.. but Huelsbeck wouldn't probably even make my top 30 of Amiga musicians ;)
Forum: Amiga scene 02 January 2020, 02:02
Replies: 54
Views: 3,157
Posted By DanScott
I never bothered protecting my games too much......

I never bothered protecting my games too much... we just slammed in the simplest of checks for the Rob Northen protection. Essentially we didn't protect games to stop (inevitable) cracking. We...
Forum: Nostalgia & memories 01 January 2020, 19:55
Replies: 505
Views: 133,342
Posted By DanScott
John Kirkland (the Wolfchild programmer) had one...

John Kirkland (the Wolfchild programmer) had one of those :)
Forum: Coders. Asm / Hardware 22 December 2019, 12:51
Replies: 19
Views: 783
Posted By DanScott
Remember also, the blitting a masked area from...

Remember also, the blitting a masked area from one arbitrary x position, to another, may require a subtraction of 2 from the destination address (essentially you are "scrolling" the source image...
Forum: Coders. Asm / Hardware 20 December 2019, 19:37
Replies: 6
Views: 605
Posted By DanScott
This is a really interesting question, and one...

This is a really interesting question, and one that I don't have the answer to, but will be very interested to know :) thinking outside the box is always great!
Forum: Coders. General 19 December 2019, 17:40
Replies: 153
Views: 17,219
Posted By DanScott
With such a fast CPU, blitter becomes rather...

With such a fast CPU, blitter becomes rather redundant

but on a vanilla 68000 / OCS it is magic :D
Forum: Coders. Asm / Hardware 19 December 2019, 16:08
Replies: 8
Views: 482
Posted By DanScott
ministartup works perfectly well on all Amigas /...

ministartup works perfectly well on all Amigas / processors / configs

On 68000, the movec part is never called, so it's just in effect some bytes in memory
Forum: Coders. Asm / Hardware 19 December 2019, 14:28
Replies: 8
Views: 482
Posted By DanScott
this should do it: mc68020 movec ...

this should do it:

mc68020
movec vbr,d0
mc68000
Forum: Coders. Asm / Hardware 17 December 2019, 20:28
Replies: 5
Views: 462
Posted By DanScott
you could manually load SPR 6 and 7 with the...

you could manually load SPR 6 and 7 with the copper on the right side of the screen
Forum: Coders. Asm / Hardware 17 December 2019, 01:37
Replies: 22
Views: 1,167
Posted By DanScott
There should be no "flickering" with a double...

There should be no "flickering" with a double buffered screen

With a single buffered screen, try sorting your objects from top to bottom, you may be able to blit them before the "raster" reaches...
Forum: Coders. Asm / Hardware 15 December 2019, 02:28
Replies: 13
Views: 933
Posted By DanScott
bravo!

bravo!
Forum: Coders. Asm / Hardware 14 December 2019, 21:04
Replies: 13
Views: 933
Posted By DanScott
system = 0 and exec = 0 in my setup Also,...

system = 0 and exec = 0 in my setup

Also, you don't need to call the play routine every update... just call the P61 Init at the start, and the module plays by itself on interrupt

also you need...
Forum: Coders. Asm / Hardware 14 December 2019, 17:04
Replies: 6
Views: 390
Posted By DanScott
True, but you have that extra compare in there to...

True, but you have that extra compare in there to do the "stepping" which is not idea for something that is essentially a 1D operation (Bresenham's is "designed" for stepping in 2D)
Forum: Coders. Asm / Hardware 14 December 2019, 14:16
Replies: 6
Views: 390
Posted By DanScott
It's essentially the same as a linear texture...

It's essentially the same as a linear texture mapping...

you need to calculate dU

dU = (U2-U1) / (Y2-Y1)


where U1 & U2 are the source "lines" of your image (U1 will often be zero), and Y1...
Forum: Coders. Asm / Hardware 13 December 2019, 23:49
Replies: 13
Views: 933
Posted By DanScott
You might need to write the VBR to the P61 VBR...

You might need to write the VBR to the P61 VBR pointer in the player


move.l .VBRptr-.VARS_HW(a5),P61_VBR
Forum: Coders. General 13 December 2019, 21:24
Replies: 574
Views: 47,536
Posted By DanScott
The NeoGeo didn't have any "tiles"... everything...

The NeoGeo didn't have any "tiles"... everything was made from sprites, even the backgrounds & foreground scrolling layers.
Showing results 1 to 40 of 522

 
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