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Forum: Coders. Asm / Hardware 13 January 2024, 07:04
Replies: 79
Views: 13,525
Posted By nonarkitten
If you're going AGA, go hires HAM6, set the...

If you're going AGA, go hires HAM6, set the control bits to repeat the same line that's just the RGBG pattern over and over. This means it's only really using 4 bitplanes for everything and even...
Forum: Coders. Asm / Hardware 13 January 2024, 06:57
Replies: 79
Views: 13,525
Posted By nonarkitten
In ECS/OCS for moveable HAM bobs: For all...

In ECS/OCS for moveable HAM bobs:

For all background tiles ensure every other pixel is a palette colour. If you want to be a little fancy, you could checkerboard it. Pick a really good base...
Forum: Hardware mods 18 September 2023, 04:31
Replies: 182
Views: 20,709
Posted By nonarkitten
Once copyright enters the public domain, it...

Once copyright enters the public domain, it cannot, ever, be re-copyrighted. More to the point, you can never re-copyright any work. This would apply to PCB artwork and schematics.

That being...
Forum: Hardware mods 11 July 2023, 20:07
Replies: 182
Views: 20,709
Posted By nonarkitten
I believe the Amiga 500 is: - Traces are...

I believe the Amiga 500 is:
- Traces are default 12.5 mil
- Grid spacing is 25 mil
- Power traces are 50 or 150 mil
- Vias appear to be 26.25/46.25 mil
- IDC holes are 31.25/46.25 mil

The...
Forum: Hardware mods 11 July 2023, 19:38
Replies: 182
Views: 20,709
Posted By nonarkitten
@SukkoPera Well, possible import issues...

@SukkoPera

Well, possible import issues aside, the design has a lot of minor errors in it as well as countless deviations from a real Amiga 500 PCB. Probably nothing catastrophic, but off...
Forum: Hardware mods 09 April 2023, 21:13
Replies: 106
Views: 23,125
Posted By nonarkitten
I've had more than one person insist that we open...

I've had more than one person insist that we open source everything because it's "right," that they'll only help if I do and then don't anyway. I have literally have had more people try and sabotage...
Forum: Hardware mods 09 April 2023, 18:42
Replies: 106
Views: 23,125
Posted By nonarkitten
Pitch decks, roadmaps, all bullshit to make...

Pitch decks, roadmaps, all bullshit to make incompetent managers feel relevant. No thanks. You can be a commercial success or failure irregardless of your whoreship of mentally vapid paperwork.
Forum: Hardware mods 24 March 2023, 20:52
Replies: 106
Views: 23,125
Posted By nonarkitten
With Buffee I kind of learned the pain of...

With Buffee I kind of learned the pain of "reinventing the wheel." As much as we can, we'll be leveraging on existing projects where and when it's suitable. In some cases, we may have to fix or alter...
Forum: Hardware mods 24 March 2023, 20:43
Replies: 148
Views: 44,433
Posted By nonarkitten
The sole reason I even entertained the idea of...

The sole reason I even entertained the idea of the beta launch was to try and get some help with testing and development and out of fifty boards, I've have zero commitments to help.

The boards...
Forum: Hardware mods 03 February 2023, 20:15
Replies: 320
Views: 66,565
Posted By nonarkitten
So I need to make pushes to git more often to...

So I need to make pushes to git more often to keep people like you happy?

Not living in a socialist country means I have to work for a living. That means 40+ hours of my week, every week of the...
Forum: Hardware mods 31 December 2022, 22:13
Replies: 320
Views: 66,565
Posted By nonarkitten
Gary does a bit more than generate DTACK. ...

Gary does a bit more than generate DTACK.

BLISS isn't a "hack" it's a feature. Though a clumsy one. Honestly, I always found the whole arbitration to be so over-baked. I think it comes from when...
Forum: Hardware mods 31 December 2022, 21:43
Replies: 320
Views: 66,565
Posted By nonarkitten
Without BLISS, access to chip RAM and registers,...

Without BLISS, access to chip RAM and registers, as well as ranger RAM, may be slower under heavy use of the blitter. It's only intended to give SOME time back to the CPU. But correct, it should work...
Forum: Hardware mods 30 December 2022, 19:19
Replies: 320
Views: 66,565
Posted By nonarkitten
Side note: the timing diagrams in Gayle...

Side note: the timing diagrams in Gayle (https://github.com/nonarkitten/amiga_replacement_project/blob/master/gary/Gayle%20Specifications.pdf) are MUCH more useful than any other document on there.
Forum: Hardware mods 30 December 2022, 19:08
Replies: 320
Views: 66,565
Posted By nonarkitten
Yeah... no dissing the amount of work that's been...

Yeah... no dissing the amount of work that's been put into MiniMig, but having worked with it, it would be a very poor reference model for how an Amiga actually works.
Forum: Hardware mods 30 December 2022, 18:56
Replies: 320
Views: 66,565
Posted By nonarkitten
I agree that the Verilog code doesn't *FEEL*...

I agree that the Verilog code doesn't *FEEL* right. Looking at PALCAS and PALEN, it's a fair bit off, but when I tried copying the old PLA logic verbatim, that didn't work and this does. When I have...
Forum: Hardware mods 29 December 2022, 15:38
Replies: 320
Views: 66,565
Posted By nonarkitten
This is mostly hearsay, but I've heard that some...

This is mostly hearsay, but I've heard that some accelerators tried pushing two accesses into that 280ns window with variable success rate. At 14MHz, the 68000 is probably too slow still to do that...
Forum: Hardware mods 19 December 2022, 03:06
Replies: 14
Views: 2,122
Posted By nonarkitten
:laughing :laughing :laughing :laughing ...

:laughing :laughing :laughing :laughing

Okay, okay, assuming these all work, why would you use an A4091 on a 2000? I mean, why even bother with SCSI anyway when you can't DMA it into CPU local...
Forum: Hardware mods 18 December 2022, 02:11
Replies: 14
Views: 2,122
Posted By nonarkitten
Go on. Name three Zorro cards that work with the...

Go on. Name three Zorro cards that work with the Vampire that you cannot do without. I'll wait...
Forum: Hardware mods 12 November 2022, 18:47
Replies: 320
Views: 66,565
Posted By nonarkitten
Yes. On the matter of the iCE65, Lattice...

Yes.

On the matter of the iCE65, Lattice refuse to grant access to developing for them. The combination of the original software AND license is impossible to get, Lattice blames Synopsys, and...
Forum: Hardware mods 16 October 2022, 06:40
Replies: 320
Views: 66,565
Posted By nonarkitten
The 2MB of chip will always be detected by a...

The 2MB of chip will always be detected by a reasonably up to date version of AmigaOS. This is always the case. Xander will automagically feed Agnus the missing high bits.

Memory above 2MB will...
Forum: Hardware mods 16 October 2022, 05:28
Replies: 320
Views: 66,565
Posted By nonarkitten
Yes, that's the plan. If you want more than 2MB,...

Yes, that's the plan. If you want more than 2MB, then that's more complicninded.
Forum: Hardware mods 13 October 2022, 06:33
Replies: 320
Views: 66,565
Posted By nonarkitten
It wouldn't be hard to omit the extra wait states...

It wouldn't be hard to omit the extra wait states on Zorro access (or clockport) with Xander, but I can't guarantee that all cards would be able to operate that fast. Might work with a decent...
Forum: Hardware mods 13 October 2022, 04:53
Replies: 106
Views: 23,125
Posted By nonarkitten
_ _ ____ _ | \ | | / __ \ | | | ...

_ _ ____ _
| \ | | / __ \ | |
| \| | | | | | | |
| . ` | | | | | | |
| |\ | | |__| | |_|
|_| \_| \____/ (_)
Forum: Hardware mods 12 October 2022, 17:06
Replies: 320
Views: 66,565
Posted By nonarkitten
How would this work without completely rewriting...

How would this work without completely rewriting Trackdisk? How would this work with custom track loaders? And how is this better than just having 2x Floppy DMA?
Forum: Hardware mods 12 October 2022, 07:00
Replies: 320
Views: 66,565
Posted By nonarkitten
EOT? Agreed, Amigas are still used by...

EOT?


Agreed, Amigas are still used by some DJs for its unique sound and versatility. Certainly it's "professional", but I think precisely, it was never designed with Red Book compatibility in...
Forum: Hardware mods 11 October 2022, 18:36
Replies: 106
Views: 23,125
Posted By nonarkitten
Ostensibly as close to zero as is mathematically...

Ostensibly as close to zero as is mathematically possible.
Forum: Hardware mods 07 October 2022, 17:08
Replies: 106
Views: 23,125
Posted By nonarkitten
Oh you mean combing. Yeah. Scandoubling is...

Oh you mean combing. Yeah. Scandoubling is superior -- deinterlacing, inferior. At least that's what Soundwave just told me.
Forum: Hardware mods 06 October 2022, 21:46
Replies: 106
Views: 23,125
Posted By nonarkitten
Scandoublers copy the RGB output and redraw it,...

Scandoublers copy the RGB output and redraw it, they don't draw the same line twice from chip RAM -- that's what Mode Promotion did.
Forum: Hardware mods 06 October 2022, 21:23
Replies: 106
Views: 23,125
Posted By nonarkitten
Kipper will be making his own. You'll have to ask...

Kipper will be making his own. You'll have to ask him if he wants to do any batches once the code is done. We'll also be making them (hopefully) available wherever Buffee is sold.
Forum: Hardware mods 05 October 2022, 06:31
Replies: 320
Views: 66,565
Posted By nonarkitten
That was a great way to get data errors. DD and...

That was a great way to get data errors. DD and HD don't have compatible media as SD and DD had. This is probably why it got a reputation for being "unreliable." On Mac and PC I never had an issue...
Forum: Hardware mods 04 October 2022, 04:11
Replies: 320
Views: 66,565
Posted By nonarkitten
No, you'd have to scale back to 4MB or 2MB of...

No, you'd have to scale back to 4MB or 2MB of chip RAM.
Forum: Hardware mods 03 October 2022, 18:39
Replies: 320
Views: 66,565
Posted By nonarkitten
The fourth component is value, not alpha. ...

The fourth component is value, not alpha.


So we have four bits per component; reg, green, blue and value. For example, if we have the 12-bit RGB colour $A37, this would look like:

R G B Bit...
Forum: Hardware mods 02 October 2022, 05:55
Replies: 148
Views: 44,433
Posted By nonarkitten
Not really maybe yesish no? Agnus on the...

Not really maybe yesish no?

Agnus on the Amiga 1000 does not have the address decoder, only the RGA bus, and only has enough address pins coming from it to address 512KB of RAM. It's not possible...
Forum: Hardware mods 29 September 2022, 16:58
Replies: 320
Views: 66,565
Posted By nonarkitten
You know there seem to be three kinds of trolls...

You know there seem to be three kinds of trolls in the Amiga community right now.

We have the feature creeps where nothing is ever good enough because in their mind it needs to compete with a...
Forum: Hardware mods 29 September 2022, 16:36
Replies: 320
Views: 66,565
Posted By nonarkitten
Why? We don't need 8Kb when we're pulling out all...

Why? We don't need 8Kb when we're pulling out all the features. Denise fits on a 1K part fine.
Forum: Hardware mods 29 September 2022, 16:35
Replies: 320
Views: 66,565
Posted By nonarkitten
Sorry, paddy71 took that out. I agree it would be...

Sorry, paddy71 took that out. I agree it would be nice, but *those people* have to have their way.


We cannot use the new iCE40's. Has to be the iCE65 L/P or iCE40 HX. Since we're apparently...
Forum: Hardware mods 29 September 2022, 16:32
Replies: 320
Views: 66,565
Posted By nonarkitten
You know what? Forget I said it. Yeah,...

You know what? Forget I said it.


Yeah, you're right, why'd I even put RAM on the board.


Consider it gone.


Current DMA only allows 30KB/s so great, off the table.
Forum: Hardware mods 29 September 2022, 05:37
Replies: 320
Views: 66,565
Posted By nonarkitten
Cool, thanks. You're right, I need to...

Cool, thanks.


You're right, I need to dial back my own expectations too.

But let me clarify.

The DMA speed up is required for AGA compatibility and the way we're doing it, adding it to all...
Forum: Hardware mods 28 September 2022, 21:21
Replies: 320
Views: 66,565
Posted By nonarkitten
Agreed. Must follow the KISS rule.

Agreed. Must follow the KISS rule.
Forum: Hardware mods 28 September 2022, 20:41
Replies: 320
Views: 66,565
Posted By nonarkitten
Yes, playing a perfectly phase aligned PCM stream...

Yes, playing a perfectly phase aligned PCM stream with the PWM frequency will have different outputs as the original PDM was implemented (zeroing PWM). However, 010101 is not correct either, not...
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