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Search: Posts Made By: robinsonb5
Forum: Retrogaming General Discussion 02 July 2019, 12:16
Replies: 8
Views: 502
Posted By robinsonb5
I wonder why it didn't sell?

I wonder why it didn't sell?
Forum: support.Hardware 12 June 2019, 01:39
Replies: 8
Views: 465
Posted By robinsonb5
The brightness bars are normal, both for real...

The brightness bars are normal, both for real Amigas and FPGA replicas. The ripple distortion isn't normal, and real Amigas won't do that. The cause is probably just that the core's clocks are...
Forum: Coders. C/C++ 08 June 2019, 18:01
Replies: 34
Views: 1,725
Posted By robinsonb5
One advantage I can see about learning by writing...

One advantage I can see about learning by writing code for a platform like the Amiga is that you will get a feel for which methods are fast and which are slow and wasteful.
If you're running your...
Forum: support.Hardware 05 June 2019, 14:35
Replies: 9
Views: 405
Posted By robinsonb5
The horrible sound is is usually caused by a...

The horrible sound is is usually caused by a build-up of mould on the disk's surface which increases the drag on the floppy drive heads. The mould tends to transfer onto the heads, preventing the...
Forum: Hardware mods 04 June 2019, 00:13
Replies: 26
Views: 1,541
Posted By robinsonb5
But why 16 strips? I count 38 through holes on...

But why 16 strips? I count 38 through holes on the picture in your first post - surely 4 strips would be sufficient? Or am I missing something obvious?
Forum: support.Hardware 02 June 2019, 23:19
Replies: 38
Views: 847
Posted By robinsonb5
Given that merely accessing areas where the RAM...

Given that merely accessing areas where the RAM should be is causing a lockup, I'm thinking the bus cycles aren't being terminated properly - would you agree?
Forum: support.Hardware 02 June 2019, 18:46
Replies: 38
Views: 847
Posted By robinsonb5
I've had a very quick look at the Alloc40...

I've had a very quick look at the Alloc40 command, and I believe it maps memory in the $01000000 to $03000000 range. (It could be $02000000 to $04000000 - I haven't looked in enough detail to be...
Forum: support.Hardware 01 June 2019, 01:08
Replies: 38
Views: 847
Posted By robinsonb5
My apologies, I assumed you were familiar with...

My apologies, I assumed you were familiar with the shell, since you successfully zipped and posted the contents of an Amiga-formatted compact flash card (not a trivial operation!)



Which...
Forum: support.Hardware 01 June 2019, 00:40
Replies: 38
Views: 847
Posted By robinsonb5
OK, the C directory contains a program called...

OK, the C directory contains a program called Alloc40 which is responsible for adding the RAM to the system. That program is run from user-startup and I suspect that's the point at which the system's...
Forum: Coders. AMOS 24 May 2019, 00:34
Replies: 17
Views: 1,098
Posted By robinsonb5
I had an idea a year or so back, when one of...

I had an idea a year or so back, when one of these discussions sprang up, about making a raycaster that plotted horizonal rather than vertical spans. The idea was to make something a bit like a...
Forum: Retrogaming General Discussion 17 May 2019, 17:16
Replies: 56
Views: 2,273
Posted By robinsonb5
For me the other interests are coding,...

For me the other interests are coding, electronics, photography, music (specifically acoustic guitar - I currently have eight, five of which are permanently in non-standard tunings) and just recently...
Forum: Coders. Contest 16 May 2019, 12:31
Replies: 28
Views: 1,072
Posted By robinsonb5
Well for what it's worth, I'm happy to donate...

Well for what it's worth, I'm happy to donate again.
Forum: project.EAB 13 May 2019, 02:01
Replies: 55
Views: 4,334
Posted By robinsonb5
Thanks for all your efforts - they are...

Thanks for all your efforts - they are appreciated. It's one of those jobs where you don't generally get the thanks you deserve because the real effort's behind-the-scenes and (when it goes right!)...
Forum: support.Hardware 04 May 2019, 01:17
Replies: 94
Views: 6,727
Posted By robinsonb5
Power supply problem, maybe? Are the custom...

Power supply problem, maybe? Are the custom chips still getting unreasonably hot?
Forum: Amiga scene 01 May 2019, 15:25
Replies: 68
Views: 6,443
Posted By robinsonb5
I have to agree with this - the art and design's...

I have to agree with this - the art and design's excellent, and it does a very good job of pushing the limits of the target platform. Well done to everyone involved!

While I'd love to see demos...
Forum: support.Demos 07 April 2019, 17:22
Replies: 6
Views: 1,474
Posted By robinsonb5
Yes, fading out is possible - and can look quite...

Yes, fading out is possible - and can look quite nice. I suspect in HAM8 it would be a bit slow, though. Here's a HAM6 example (using AMOSPro of all things!) I'm pretty sure there was an extension...
Forum: support.Hardware 03 April 2019, 14:47
Replies: 11
Views: 398
Posted By robinsonb5
Agreed - it looks like a problem with the...

Agreed - it looks like a problem with the horizontal sync signal. Does the monochrome composite output work OK?
Forum: support.Hardware 08 March 2019, 23:49
Replies: 6
Views: 521
Posted By robinsonb5
I've just googled the datasheet -...

I've just googled the datasheet - https://www.xilinx.com/support/documentation/data_sheets/ds056.pdf


if you look at the "Device part marking and ordering combination information" section you'll...
Forum: Coders. Asm / Hardware 23 February 2019, 16:56
Replies: 2
Views: 434
Posted By robinsonb5
You're going to need to replicate the eor...

You're going to need to replicate the eor trickery. Copy bit 9 to bit 8 to inject an 'up', Set bit 8 to bit 9's complement to cancel it. (Or it might be the other way round! Would have to try it...
Forum: Nostalgia & memories 20 January 2019, 02:35
Replies: 73
Views: 5,624
Posted By robinsonb5
That's mainly because modern mixes have many more...

That's mainly because modern mixes have many more channels to deal with. A naive method of mixing channels is to add the signals together and divide by the number of channels. That will obviously...
Forum: Nostalgia & memories 19 January 2019, 17:26
Replies: 73
Views: 5,624
Posted By robinsonb5
I think part of it is also that people want to be...

I think part of it is also that people want to be able to listen to music in their cars and other noisy environments. The low dynamic range means that more of the song is audible over road noise.
Forum: Retrogaming General Discussion 10 January 2019, 15:14
Replies: 147
Views: 8,627
Posted By robinsonb5
ROM space will have been a factor here, too.

ROM space will have been a factor here, too.
Forum: News 27 November 2018, 00:21
Replies: 28
Views: 2,810
Posted By robinsonb5
I voted for expanded - but I'd like to see games...

I voted for expanded - but I'd like to see games (and demos, for that matter) that are still designed around the Amiga's unique hardware. As soon as the extra horsepower on an expanded machine is...
Forum: Coders. Asm / Hardware 24 November 2018, 18:02
Replies: 23
Views: 1,233
Posted By robinsonb5
Probably a silly question, but have you added...

Probably a silly question, but have you added instructions to set all eight bitplanes to the copperlist? It looks from your screenshot as though at least one bitplane is showing non-image data.
Forum: support.Hardware 23 November 2018, 13:25
Replies: 6
Views: 313
Posted By robinsonb5
Are you absolutely sure there isn't a break in...

Are you absolutely sure there isn't a break in the controller's cable, or a dodgy connection at the plug? All the things that fix your issue have one thing in common - physically disturbing the...
Forum: Coders. Asm / Hardware 21 November 2018, 12:03
Replies: 1,000
Views: 41,821
Posted By robinsonb5
Better yet would be to define a minimal embedded...

Better yet would be to define a minimal embedded environment to avoid the overhead of executable formats at all. Imagine both a 68K and X86 machine where the code can live in ROM, and the program...
Forum: Coders. Asm / Hardware 01 November 2018, 10:41
Replies: 1,000
Views: 41,821
Posted By robinsonb5
OK :D ...

OK :D https://www.youtube.com/watch?v=fsnpW_14sHo

Point taken though, for the time and the technology that's really cool. Looks awful to today's eyes, but a noteworthy milestone nonetheless.
Forum: support.Hardware 25 August 2018, 18:42
Replies: 7
Views: 821
Posted By robinsonb5
The big problem is that LCD monitors have...

The big problem is that LCD monitors have preconceived notions about how many pixels they should expect for particular scanrates. They only sample the incoming signal once per expected pixel, and...
Forum: Retrogaming General Discussion 08 August 2018, 02:04
Replies: 26
Views: 1,584
Posted By robinsonb5
A thread about 80s Kids TV nostalgia and Duckula...

A thread about 80s Kids TV nostalgia and Duckula hasn't been mentioned yet?
Forum: News 04 August 2018, 19:02
Replies: 95
Views: 16,788
Posted By robinsonb5
True - but for music production a DE1 or DE2...

True - but for music production a DE1 or DE2 would be a better bet. The FPGA is old but the boards have high quality audio codecs on board, whereas the MIST has a fairly basic sigma delta audio...
Forum: Coders. General 23 July 2018, 12:15
Replies: 587
Views: 53,380
Posted By robinsonb5
Actually quite a lot of A500s (including the one...

Actually quite a lot of A500s (including the one I had as a kid) shipped with the 8372A Agnus, and thus could access 1 meg of Chip RAM with a simple jumper mod on the motherboard - even though the...
Forum: Coders. General 10 July 2018, 14:04
Replies: 587
Views: 53,380
Posted By robinsonb5
Yes - you don't even need the full ECS chipset...

Yes - you don't even need the full ECS chipset for 1mb of chip RAM, just Agnus (8372 or higher) and a small hardware mod on A500 motherboards. You need the full ECS chipset for 2mb of chip RAM.

...
Forum: support.Hardware 05 July 2018, 18:16
Replies: 4
Views: 350
Posted By robinsonb5
Yes, it should work - or at least the directions...

Yes, it should work - or at least the directions and buttons B & C should work without modification. If you swap pins 5 and 7 then the right software can read all buttons.
Forum: support.Hardware 02 July 2018, 11:46
Replies: 3
Views: 315
Posted By robinsonb5
Search the local charity / thrift shops or EBay...

Search the local charity / thrift shops or EBay for second-hand LCD TVs with composite or RGB SCART input, perhaps?
Forum: support.Hardware 14 June 2018, 13:50
Replies: 58
Views: 4,958
Posted By robinsonb5
It's not a motherboard problem as such, it's just...

It's not a motherboard problem as such, it's just an incompatibility between microcontrollers used in mouse adapters and the Amiga's right mouse button line. That pin on the Amiga's gameport does...
Forum: Amiga scene 14 June 2018, 13:12
Replies: 14
Views: 1,863
Posted By robinsonb5
Interesting - it does make sense, so much so that...

Interesting - it does make sense, so much so that I'm now wondering if any computers were actually designed and built that dealt with colour in this way? (In the 80s / very early 90s, at least -I'm...
Forum: Amiga scene 13 June 2018, 13:32
Replies: 14
Views: 1,863
Posted By robinsonb5
I'm sure I remember reading somewhere that HAM...

I'm sure I remember reading somewhere that HAM mode was originally intended to work in some kind of YUV-like mode instead of RGB, and it was nearly removed when the decision was made to go RGB. (Of...
Forum: Amiga scene 03 June 2018, 23:37
Replies: 627
Views: 36,365
Posted By robinsonb5
Because in a handheld device the emphasis isn't...

Because in a handheld device the emphasis isn't on raw number-crunching performance - it's on power efficiency. If the web weren't such an unholy bloated javascript-ridden mess these days phones...
Forum: Coders. Contest 02 June 2018, 00:19
Replies: 437
Views: 80,565
Posted By robinsonb5
I'm happy to put 50 EUR in the pot too.

I'm happy to put 50 EUR in the pot too.
Forum: Coders. Contest 28 May 2018, 22:41
Replies: 437
Views: 80,565
Posted By robinsonb5
And that's not necessarily a good thing if the...

And that's not necessarily a good thing if the end result feels like a PC game that's running on an underpowered PC. If you want to be distanced from the technicalities of the hardware, why would...
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