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Search: Posts Made By: robinsonb5
Forum: support.Other 28 May 2020, 23:45
Replies: 4
Views: 126
Posted By robinsonb5
The VGAOnly driver does reduce how much of the...

The VGAOnly driver does reduce how much of the screen you can fill in multiscan modes - I found with my 1438 the best results came from DblNTSC without VGAOnly installed - but no, you can't...
Forum: Coders. C/C++ 27 May 2020, 21:16
Replies: 21
Views: 865
Posted By robinsonb5
Great to see you got it working. I look forward...

Great to see you got it working. I look forward to seeing what you create!
Forum: Retrogaming General Discussion 27 May 2020, 16:59
Replies: 312
Views: 18,270
Posted By robinsonb5
Realistically you're not going to have a detailed...

Realistically you're not going to have a detailed 3D background. In the interests of not having to update the entire screen's contents every frame, I think the background would have to be a...
Forum: Coders. C/C++ 24 May 2020, 12:23
Replies: 21
Views: 865
Posted By robinsonb5
But where does that jmp $6 come from? Is that...

But where does that jmp $6 come from? Is that from your code, or is it startup / library code? If the latter, have you tried linking without startup / c library?
Forum: Coders. C/C++ 24 May 2020, 11:50
Replies: 21
Views: 865
Posted By robinsonb5
I've just tried -mpcrel with m68k-elf-gcc and it...

I've just tried -mpcrel with m68k-elf-gcc and it does indeed seem to generate PC-relative code. What errors are you seeing with that option?



What exactly are you trying to do within the C...
Forum: Coders. C/C++ 24 May 2020, 10:15
Replies: 21
Views: 865
Posted By robinsonb5
Yeah that does make things a lot trickier. If...

Yeah that does make things a lot trickier. If the OS is still alive, one brute-force, ugly method might be to save the executable back out to RAM: and LoadSeg() it from there.


What's the...
Forum: Retrogaming General Discussion 24 May 2020, 10:02
Replies: 312
Views: 18,270
Posted By robinsonb5
It just creates a horrible fringe effect on every...

It just creates a horrible fringe effect on every pixel! Actually, no, it has a characteristic slightly-out-of-focus look, but it's not awful. See for yourself, if you wish - there's a little...
Forum: Coders. C/C++ 24 May 2020, 09:40
Replies: 21
Views: 865
Posted By robinsonb5
A long time ago I solved a similar problem by...

A long time ago I solved a similar problem by writing an AMOSPro extension which could load code modules (using LoadSeg() so with full relocation). My modules contained a header which the extension...
Forum: Retrogaming General Discussion 22 May 2020, 22:18
Replies: 312
Views: 18,270
Posted By robinsonb5
But you can group three pixels together,...

But you can group three pixels together, modifying first red, then green, then blue - which amounts to pretty much the same thing.




Copperchunky is cool - I've used it myself (though again,...
Forum: support.Apps 22 May 2020, 21:19
Replies: 0
Views: 118
Posted By robinsonb5
Workbench overscan

Does anyone know of a hack, utility or other method of forcing Workbench (3.1) to open its screen with VIDEO_OVERSCAN rather than TEXT_OVERSCAN?



I could have sworn I managed this years back on...
Forum: Retrogaming General Discussion 22 May 2020, 16:36
Replies: 312
Views: 18,270
Posted By robinsonb5
Ermmmm.... not quite. As you say, the base...

Ermmmm.... not quite. As you say, the base colours have eight bits of colour information per RGB channel so you have 24-bit freedom there.

However, HAM8 modifiers can only change the upper six...
Forum: Retrogaming General Discussion 22 May 2020, 00:13
Replies: 312
Views: 18,270
Posted By robinsonb5
A lot of AGA demos use this trick - in...

A lot of AGA demos use this trick - in conjunction with Chunky2Planar. It's pretty nice. If you're drawing to such a screen in realtime it's often easier to use groups of four pixels rather than...
Forum: Retrogaming General Discussion 19 May 2020, 01:00
Replies: 312
Views: 18,270
Posted By robinsonb5
I get the feeling that by the time the '060 came...

I get the feeling that by the time the '060 came along everyone was obsessed with doing texture-mapping and chunky-based effects - so I don't think there are many, if any, that really explore the...
Forum: Retrogaming General Discussion 18 May 2020, 21:18
Replies: 312
Views: 18,270
Posted By robinsonb5
The best way to deal with that would be to do...

The best way to deal with that would be to do input handling - including combo-detection - within a VBlank interrupt. The game loop would see combos as extra "buttons".
Forum: Coders. General 14 May 2020, 00:01
Replies: 0
Views: 196
Posted By robinsonb5
CPU detection and SysInfo

Does anyone happen to know how SysInfo detects a 68020 CPU (as opposed to a 68EC020?)
I'm tinkering with Minimig cores again, and I noticed that in both DiagROM and SysInfo the CPU was being...
Forum: Hardware mods 09 May 2020, 14:52
Replies: 301
Views: 33,616
Posted By robinsonb5
There was an interesting interview about the...

There was an interesting interview about the Clone-A project where he said that "everytime we’re fixing a bug, we discover that the fix actually produces a smaller design. It’s really amazing what...
Forum: Retrogaming General Discussion 07 May 2020, 19:46
Replies: 312
Views: 18,270
Posted By robinsonb5
Is there much original topic left at this point?...

Is there much original topic left at this point? :)


I think we have a pretty clear "Hell, no!" as an answer to the original question, with a more interesting question of "Could an...
Forum: Hardware mods 06 May 2020, 12:48
Replies: 23
Views: 2,469
Posted By robinsonb5
I think it would have to be arranged so that the...

I think it would have to be arranged so that the virtual Denise fetches as though from four high-res bitplanes, then reads a complete chunky pixel (or maybe pair of pixels) from each in turn?

...
Forum: Retrogaming General Discussion 05 May 2020, 00:12
Replies: 312
Views: 18,270
Posted By robinsonb5
"Next-to-nothing" can be enough to make a...

"Next-to-nothing" can be enough to make a significant difference, though. Obviously more is always better, but even as little as 128k of fast RAM - just enough to get the rendering loops out of chip...
Forum: Hardware mods 01 May 2020, 19:40
Replies: 301
Views: 33,616
Posted By robinsonb5
The Gotek already has a USB-capable...

The Gotek already has a USB-capable microcontroller - can it support more than one port?
If so, is there any spare capacity in that chip, and scope to integrate HID firmware as well as floppy...
Forum: Amiga scene 27 April 2020, 23:36
Replies: 80
Views: 5,174
Posted By robinsonb5
I'd argue that the Amiga beat the current crop of...

I'd argue that the Amiga beat the current crop of Mini consoles to the punch by well over a decade with the original Minimig!
OK, it didn't come with a case (though there was one available), and you...
Forum: support.Hardware 27 April 2020, 18:25
Replies: 19
Views: 920
Posted By robinsonb5
Were you previously using the 5-pin header or the...

Were you previously using the 5-pin header or the 8-pin header on the board?
Having done a bit of googling about the board, I think the 8-pin header is equivalent to the VGA-in, but the 5-pin header...
Forum: support.Hardware 27 April 2020, 12:05
Replies: 19
Views: 920
Posted By robinsonb5
I'm unclear what your original solution looked...

I'm unclear what your original solution looked like - I'm not familiar with the GBS8220 - but it sounds like it's a pin header at the GBS8220? What was at the Amiga end?

Are you sure that pin...
Forum: Amiga scene 26 April 2020, 21:47
Replies: 34
Views: 2,307
Posted By robinsonb5
Interestingly, the original Minimig - which...

Interestingly, the original Minimig - which features a real 68000 and has SRAM rather than SDRAM - does actually accelerate the blitter (as well as clocking the CPU faster and enabling a cache), when...
Forum: Amiga scene 24 April 2020, 19:18
Replies: 90
Views: 5,404
Posted By robinsonb5
If you want to be era-appropriate then probably...

If you want to be era-appropriate then probably MIPS. Should be fast enough to emulate a 7mhz 68k for the games back catalogue, and much faster in native mode.

Ok course, in pipe-dream land you...
Forum: Amiga scene 24 April 2020, 18:08
Replies: 90
Views: 5,404
Posted By robinsonb5
12-bit values are a pain in the backside for CPUs...

12-bit values are a pain in the backside for CPUs to move around, unless they're zero-padded within 16-bit values. You really don't want to moving data around in byte-and-a-half chunks. For this...
Forum: project.EAB 23 April 2020, 20:35
Replies: 18
Views: 1,221
Posted By robinsonb5
It seems to be infecting all walks of life - I...

It seems to be infecting all walks of life - I saw a patreon link the other day for a *retailer* (not computer-related) who's now expecting people to support the production of his own promotional...
Forum: Nostalgia & memories 21 April 2020, 23:46
Replies: 4
Views: 683
Posted By robinsonb5
Oh shit, I just saw what he did to that poor...

Oh shit, I just saw what he did to that poor defenceless hard-sectored floppy disk.

He is *so* not one of us.
Forum: Amiga scene 20 April 2020, 21:28
Replies: 86
Views: 8,380
Posted By robinsonb5
Yeah, I only mentioned Banshee because it...

Yeah, I only mentioned Banshee because it happened to come to mind as an example - there are of course others.



Super Stardust is superb, but so is the original Stardust. The Tunnel-sequences...
Forum: Amiga scene 20 April 2020, 21:17
Replies: 412
Views: 56,429
Posted By robinsonb5
Excellent work - it popped up on my YouTube...

Excellent work - it popped up on my YouTube suggested videos a few minutes ago!
Forum: Amiga scene 20 April 2020, 19:34
Replies: 86
Views: 8,380
Posted By robinsonb5
Time will tell, but I suspect we might. I don't...

Time will tell, but I suspect we might. I don't think the A1200's capabilities were ever fully explored for this kind of game because everyone wanted to break new ground with Wolfenstein, Doom and...
Forum: Retrogaming General Discussion 20 April 2020, 13:45
Replies: 142
Views: 9,233
Posted By robinsonb5
For what it's worth I've found the conversation...

For what it's worth I've found the conversation interesting - as I usually do when Gorf and Meynaf start one of their epic exchanges - perhaps there should be an unwritten rule that any post more...
Forum: support.Hardware 20 April 2020, 13:28
Replies: 67
Views: 3,440
Posted By robinsonb5
Yes indeed - great to see some progress! ...

Yes indeed - great to see some progress!



Good luck. I don't know what it's like where you are, but here we have Tesco, Morrisons, Lidl and Aldi within walking distance, and of the four, the...
Forum: support.Hardware 17 April 2020, 23:03
Replies: 10
Views: 711
Posted By robinsonb5
Here you go: ...

Here you go:
https://www.dropbox.com/s/6aa1ahpsv0barj5/PTSweeps.zip?dl=0

This contains 96KHz recordings from an A500+ and two different A500s (both Rev 5, though - it turns out I don't have a...
Forum: project.Amiga Game Factory 17 April 2020, 14:41
Replies: 100
Views: 6,883
Posted By robinsonb5
Another good reason to avoid the 31KHz modes is...

Another good reason to avoid the 31KHz modes is that the faster pixel clock puts pressure on Chip RAM bandwidth and you lose a big chunk of the AGA speed advantage.
Forum: support.Hardware 17 April 2020, 14:29
Replies: 10
Views: 711
Posted By robinsonb5
I have two A500s and an A500+ (all acquired after...

I have two A500s and an A500+ (all acquired after a decluttering operation was supposed to leave me with fewer Amigas...!) - when I get a chance I'll record from all three using the same soundcard...
Forum: Hardware mods 14 April 2020, 23:14
Replies: 301
Views: 33,616
Posted By robinsonb5
Nice - thanks for the update! (I was...

Nice - thanks for the update!


(I was wondering only yesterday whether there was any progress on this project - mostly because I've started re-watching 'Firefly', which led me to wonder whether...
Forum: Coders. C/C++ 13 April 2020, 14:32
Replies: 15
Views: 984
Posted By robinsonb5
OK I'm not talking about your build environment -...

OK I'm not talking about your build environment - I mean the Amiga environment in which you're trying to run your executable.


You said you're using FS-UAE. Which kickstart are you using, and...
Forum: Coders. C/C++ 13 April 2020, 13:09
Replies: 15
Views: 984
Posted By robinsonb5
The datatypes.library and individual datatypes...

The datatypes.library and individual datatypes are disk-based - are they present and correctly set up in your test environment?
Forum: Coders. C/C++ 13 April 2020, 08:53
Replies: 15
Views: 984
Posted By robinsonb5
Without seeing your actual code I can only guess,...

Without seeing your actual code I can only guess, but the most likely explanation is that audio.c contains an init function (i.e. a function whose name starts with _INIT) which is getting called...
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