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Forum: Amiga scene Yesterday, 23:29
Replies: 747
Views: 111,214
Posted By E-Penguin
I'll give this a go with the z-500 Zorro-Adaptor...

I'll give this a go with the z-500 Zorro-Adaptor & Matze graphics card and report back (next week). Unsupported though it may be...
Forum: Coders. Blitz Basic Yesterday, 18:10
Replies: 2
Views: 133
Posted By E-Penguin
I remember reading somewhere that at 030 and...

I remember reading somewhere that at 030 and beyond, the CPU can move / modify memory quicker than the blitter. I don't recall the source. Presumably the vagaries of fast vs chip memory mean there...
Forum: OT - General 18 July 2018, 22:35
Replies: 17
Views: 1,161
Posted By E-Penguin
How's it with emoji? 3????????????

How's it with emoji?
3????????????
Forum: Amiga scene 18 July 2018, 19:27
Replies: 63
Views: 4,506
Posted By E-Penguin
Sysadmin is a thankless task. If everything is...

Sysadmin is a thankless task. If everything is going well people forget you exist and if it's not then you get all the blame.

Best of luck
Forum: Coders. Blitz Basic 15 July 2018, 21:35
Replies: 11
Views: 334
Posted By E-Penguin
Nice find. There's an updated String library...

Nice find.

There's an updated String library here, maybe that's pointer-safe?
http://aminet.net/package/dev/basic/NewCommandSet
Forum: support.Hardware 15 July 2018, 21:25
Replies: 41
Views: 1,390
Posted By E-Penguin
Wait, why would you turn off your Amiga anyway?

Wait, why would you turn off your Amiga anyway?
Forum: Coders. Blitz Basic 12 July 2018, 19:09
Replies: 12
Views: 556
Posted By E-Penguin
Looks good ...

Looks good
http://www.david-mcminn.co.uk/blitz-2000/archives/mildred/
Forum: Amiga scene 08 July 2018, 10:28
Replies: 77
Views: 3,962
Posted By E-Penguin
Isn't that pretty much MIST and derivatives? ...

Isn't that pretty much MIST and derivatives?

Seeing how good emulation is these days; how about an interface board for an off-the-shelf ITX board, offering various Amiga i/o ports & slots, and the...
Forum: Amiga scene 08 July 2018, 10:20
Replies: 1
Views: 191
Posted By E-Penguin
Nice. Makes a nice change from running a...

Nice.

Makes a nice change from running a school's heating system...
Forum: Coders. Blitz Basic 27 June 2018, 23:51
Replies: 136
Views: 3,987
Posted By E-Penguin
I'm beginning to think that the art of 68k...

I'm beginning to think that the art of 68k programming lies in the mastery of the various addressing modes.
Forum: Coders. Blitz Basic 27 June 2018, 17:00
Replies: 136
Views: 3,987
Posted By E-Penguin
Nice. Instructive about how the variables are...

Nice. Instructive about how the variables are mapped to the data registers too. Thanks :)
Forum: Coders. Blitz Basic 27 June 2018, 09:55
Replies: 136
Views: 3,987
Posted By E-Penguin
I tried with the logic flipped (BMI rather than...

I tried with the logic flipped (BMI rather than BPL) and it was slower than the built-in function. I'll give it a go with things that way round. Maybe it's the overhead of the statement call
Forum: Coders. Blitz Basic 26 June 2018, 17:01
Replies: 136
Views: 3,987
Posted By E-Penguin
I was using 2.1, but didn't have cycle exact on....

I was using 2.1, but didn't have cycle exact on. Maybe it makes a difference in this case. I'll code up an ASM function per idrougge's link when I get a chance.
Forum: Coders. Blitz Basic 26 June 2018, 13:19
Replies: 136
Views: 3,987
Posted By E-Penguin
I guess it's a matter of shift vs a conditional...

I guess it's a matter of shift vs a conditional branch + jmp. They look (https://wiki.neogeodev.org/index.php?title=68k_instructions_timings#Shift_and_rotate_instructions) about the same order of...
Forum: Coders. Blitz Basic 26 June 2018, 00:12
Replies: 136
Views: 3,987
Posted By E-Penguin
Abs and QAbs are usually within a tick of...

Abs and QAbs are usually within a tick of eachother; I'm putting that down to variance in the Rnd command (I avoided literals to ensure they weren't optimised away). Standard A1200 WinUAE config.
...
Forum: Coders. Blitz Basic 25 June 2018, 22:20
Replies: 136
Views: 3,987
Posted By E-Penguin
With the most bare-bones ASM I can think of (am I...

With the most bare-bones ASM I can think of (am I missing a trick?) I can't beat QABS. It must use voodoo.

-- edited to add --
Trying the shift, XOR, mask approach here...
Forum: Coders. Blitz Basic 25 June 2018, 15:36
Replies: 136
Views: 3,987
Posted By E-Penguin
I'd be interested to see how QABS is quicker than...

I'd be interested to see how QABS is quicker than my ASM version. It can't be done more quickly than a sub, a conditional branch, and a neg, surely!
Forum: News 25 June 2018, 12:56
Replies: 114
Views: 7,303
Posted By E-Penguin
I long to one day write a game of sufficient...

I long to one day write a game of sufficient complexity that it suffers from conflicts.
Forum: Coders. Contest 22 June 2018, 12:59
Replies: 383
Views: 68,494
Posted By E-Penguin
You're not? The last version of the draft rules...

You're not? The last version of the draft rules we got to also allowed HD images in any standard archive format.
Forum: Coders. Contest 22 June 2018, 10:02
Replies: 383
Views: 68,494
Posted By E-Penguin
http://GameDevCompAmi.ga now points to this...

http://GameDevCompAmi.ga now points to this sub-forum
Forum: Coders. Contest 21 June 2018, 20:14
Replies: 15
Views: 639
Posted By E-Penguin
I wouldn't know a good game if it bit me but I'm...

I wouldn't know a good game if it bit me but I'm keen to assist with running the competition.
Forum: News 21 June 2018, 10:44
Replies: 154
Views: 11,650
Posted By E-Penguin
You're on hackaday. Suddenly my worlds start to...

You're on hackaday. Suddenly my worlds start to collide.

https://hackaday.com/2018/06/21/the-best-new-amiga-title-of-2018/
Forum: Coders. Blitz Basic 20 June 2018, 19:02
Replies: 144
Views: 11,337
Posted By E-Penguin
As promised, here's my fixed version, for...

As promised, here's my fixed version, for interpolating through the RGB colourspace. I'm still working on an HSV version. Example interpolation attached.

; By Daniel Lakey, 2018
; Distributed...
Forum: Coders. Blitz Basic 20 June 2018, 13:03
Replies: 144
Views: 11,337
Posted By E-Penguin
I fly interplanetary spacecraft for the European...

I fly interplanetary spacecraft for the European Space Agency as a day job. It's a lot like working with vintage hardware but in SPAAAAAAAAAAAAAAAAAACE
Forum: Coders. Blitz Basic 20 June 2018, 01:44
Replies: 144
Views: 11,337
Posted By E-Penguin
Well some pictures are of a comet, but one has to...

Well some pictures are of a comet, but one has to take what one can get. Maybe phobos too if I can find a nice pic.



RGB interpolation tends to go through a grey phase which is less visually...
Forum: Coders. Blitz Basic 20 June 2018, 01:06
Replies: 144
Views: 11,337
Posted By E-Penguin
Glad it's not just me then! I'll post my version...

Glad it's not just me then! I'll post my version here once I'm done with it.

Out of interest did you convert to HSV colour space? Google suggests it might give nicer colour transitions.
Forum: Coders. Blitz Basic 20 June 2018, 00:35
Replies: 144
Views: 11,337
Posted By E-Penguin
PaletteRange...

PaletteRange Palette#,StartCol,EndCol,r0,g0,b0,r1,g1,b1

PaletteRange creates a spread of colors within a palette. Similar to DPaint's spread
function PaletteRange takes a start and end colour...
Forum: Coders. Blitz Basic 18 June 2018, 20:09
Replies: 136
Views: 3,987
Posted By E-Penguin
You should be able to test the status register...

You should be able to test the status register after the subtract and if negative negate the result. I'm not near a compiler right now but something like...

Function FastAbsDiff{a.w, b.w}
;a is...
Forum: Coders. Blitz Basic 18 June 2018, 15:09
Replies: 136
Views: 3,987
Posted By E-Penguin
Only four checks are required to test overlaps of...

Only four checks are required to test overlaps of two axis-aligned bounding boxes.

The "zones" concept is analogous to the "cells" approach, but with vary large cells. There's probably a happy...
Forum: Amiga scene 18 June 2018, 12:58
Replies: 317
Views: 42,644
Posted By E-Penguin
Put me down for an assembled one please!

Put me down for an assembled one please!
Forum: Coders. Blitz Basic 16 June 2018, 14:00
Replies: 15
Views: 502
Posted By E-Penguin
I've been trying to get bcd arithmetic working...

I've been trying to get bcd arithmetic working but it seems to cause a guru. It looks as if the address registers are being messed up, although I'm using pure asm in a statement. Does anyone know if...
Forum: Coders. Blitz Basic 16 June 2018, 13:49
Replies: 136
Views: 3,987
Posted By E-Penguin
I need to check the syntax but you should be able...

I need to check the syntax but you should be able to replace the direction change "multiplication by - 1" with a negation and an addition (dir = (~dir) + 1). Assuming two's complement.
Forum: Coders. Blitz Basic 16 June 2018, 08:06
Replies: 136
Views: 3,987
Posted By E-Penguin
Master484 thank you for sharing the code! I see a...

Master484 thank you for sharing the code! I see a few potential optimisations; I'll have a go and repost it here if they make any difference.
Forum: News 15 June 2018, 13:08
Replies: 154
Views: 11,650
Posted By E-Penguin
Just paid for my first Amiga game in about 25...

Just paid for my first Amiga game in about 25 years. :) Looking forward to playing it (and hopefully getting the Mrs hooked on it so that I can justify having the CD³² in the lounge).
Forum: Coders. Blitz Basic 13 June 2018, 15:50
Replies: 136
Views: 3,987
Posted By E-Penguin
I don't think you can have 1+3. You can have 1+2...

I don't think you can have 1+3. You can have 1+2 or 2+3.

http://amigadev.elowar.com/read/ADCD_2.1/Hardware_Manual_guide/node0092.html


If you set it for four bitplanes, you'll have two odd...
Forum: Amiga scene 12 June 2018, 21:28
Replies: 625
Views: 27,073
Posted By E-Penguin
There are Unix ports on STM32s, so there's...

There are Unix ports on STM32s, so there's nothing intrinsically wrong with ARMs in terms of supporting complex functionality on limited resources. I'm just getting into M68k asm but from what I've...
Forum: Coders. Blitz Basic 12 June 2018, 17:43
Replies: 12
Views: 556
Posted By E-Penguin
Nice, I'll give that a go as my next project. I...

Nice, I'll give that a go as my next project. I might assume that anything with an RTG board has an FPU in it* so using AmiBlitz3 directly makes sense.

except my A500, which has an RTG board...
Forum: Coders. Blitz Basic 12 June 2018, 17:14
Replies: 12
Views: 556
Posted By E-Penguin
Blitz and RTG?

I realise Blitz is really all about banging the hardware and CopLists and sprites and such, but should an intrepid developer want to branch out into the world of RTG, how might one go about it? Is it...
Forum: Coders. Blitz Basic 11 June 2018, 21:12
Replies: 136
Views: 3,987
Posted By E-Penguin
No expert but I think the width is important for...

No expert but I think the width is important for DMA as the screen is drawn per line. A thinner display means less time fetching for the next line. Whereas a PAL display contains 256 lines whether...
Forum: Coders. Blitz Basic 11 June 2018, 17:21
Replies: 136
Views: 3,987
Posted By E-Penguin
This is a variation on the tile approach - assign...

This is a variation on the tile approach - assign every object to a tile and check collisions against the surrounding tiles when doing a move?

Imagine a 20x16 byte array, each cell representing a...
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