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      /  Emu68K + FPGA
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Karlos 
Emu68K + FPGA
Posted on 3-May-2025 8:32:47
#1 ]
Elite Member
Joined: 24-Aug-2003
Posts: 4943
From: As-sassin-aaate! As-sassin-aaate! Ooh! We forgot the ammunition!

https://x.com/Claude1079/status/1878319994129223970

Phwoar.

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amigang 
Re: Emu68K + FPGA
Posted on 3-May-2025 9:26:48
#2 ]
Elite Member
Joined: 12-Jan-2005
Posts: 2129
From: Cheshire, England

@Karlos

Im interested in this, I was hoping A1200NG was going to be more like this.

I very tempted to get a FPGA system now they gotten cheaper and more on par with the price of Pi emulation system can do. I mean that Tang Nano 20K can be bought for ÂŁ30,

I have however always personal felt Software Emulation was good/close enough.

I would like it if at Amiga show they did a kinda blind coke test and see if you could notice FPGA vs Emulation vs Classic

learn more about different FPGA system here
https://amigang.com/hardware-fpga-amigas/

(self promo! )

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IntuitionAmiga 
Re: Emu68K + FPGA
Posted on 3-May-2025 10:41:58
#3 ]
Regular Member
Joined: 5-Sep-2013
Posts: 132
From: Unknown

@Karlos

AGA chipset on FPGA with Pi4 Emu68 inside an A1200 wedge with an adapters for the keyboard and floppy drive would be perfect setup for me.

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ppcamiga1 
Re: Emu68K + FPGA
Posted on 3-May-2025 12:06:35
#4 ]
Super Member
Joined: 23-Aug-2015
Posts: 1000
From: Unknown

It is 30 years too late and therefore useless.

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pixie 
Re: Emu68K + FPGA
Posted on 3-May-2025 19:52:31
#5 ]
Elite Member
Joined: 10-Mar-2003
Posts: 3458
From: Figueira da Foz - Portugal

@ppcamiga1

Just use your PC already

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kolla 
Re: Emu68K + FPGA
Posted on 3-May-2025 22:29:18
#6 ]
Elite Member
Joined: 20-Aug-2003
Posts: 3435
From: Trondheim, Norway

@ppcamiga1

Shouldn’t you post in the “New PPC hardware announced” thread instead?

Last edited by kolla on 04-May-2025 at 06:22 AM.

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IntuitionAmiga 
Re: Emu68K + FPGA
Posted on 3-May-2025 23:55:33
#7 ]
Regular Member
Joined: 5-Sep-2013
Posts: 132
From: Unknown

@ppcamiga1

Too late for who?

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cdimauro 
Re: Emu68K + FPGA
Posted on 4-May-2025 5:26:38
#8 ]
Elite Member
Joined: 29-Oct-2012
Posts: 4340
From: Germany

@IntuitionAmiga

Quote:

IntuitionAmiga wrote:
@ppcamiga1

Too late for who?

Well, he's still ok with PCs running Windows '95.

So, either he's late or retarded... or both.

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pixie 
Re: Emu68K + FPGA
Posted on 4-May-2025 9:10:43
#9 ]
Elite Member
Joined: 10-Mar-2003
Posts: 3458
From: Figueira da Foz - Portugal

@kolla

Please don’t stray our analog engagement unit toward lesser threads. We need him here, where his work matters!

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coder76 
Re: Emu68K + FPGA
Posted on 4-May-2025 11:43:28
#10 ]
Member
Joined: 20-Mar-2025
Posts: 19
From: Finland

@Karlos

Yes, this is the future of high-performance 68k Amigas, having a Pistorm ARM CPU emulating 68k CPUs, and Amiga custom chips in FPGA. That is, if new 1-2 GHz 68k CPU ASICs can't be made. Maybe the Apolloteam will realize this and make the SAGA chipset available also as a separate chip. Too little time has been spent on innovating the next gen Amiga custom chipset, SAGA is just one possibility, there should be more competition, and best FPGA chipset then wins.

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Karlos 
Re: Emu68K + FPGA
Posted on 4-May-2025 19:15:54
#11 ]
Elite Member
Joined: 24-Aug-2003
Posts: 4943
From: As-sassin-aaate! As-sassin-aaate! Ooh! We forgot the ammunition!

@coder76

There's room for both. I think the 68080 is still very appealing to a lot of users. Just as there's still room for original silicon, albeit it's not going to compete performance wise.

It's good to have options.

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coder76 
Re: Emu68K + FPGA
Posted on 4-May-2025 22:50:01
#12 ]
Member
Joined: 20-Mar-2025
Posts: 19
From: Finland

@Karlos

Quote:

Karlos wrote:
There's room for both. I think the 68080 is still very appealing to a lot of users. Just as there's still room for original silicon, albeit it's not going to compete performance wise.

It's good to have options.


Yes, you are right, and there is still a problem with this new hardware (USB/Ethernet), that it is not part of amiga custom chips. And therefore cannot easily be used with OS turned off. In the SAGA chipset, for example, the USB mice and joysticks can still be accessed like the old hardware from $DFF000 address space, and so do not require driver software or OS to work, which is very good. Although the HW support is more limited with this kind of system.

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pixie 
Re: Emu68K + FPGA
Posted on 5-May-2025 8:30:54
#13 ]
Elite Member
Joined: 10-Mar-2003
Posts: 3458
From: Figueira da Foz - Portugal

@coder76

Quote:
Yes, you are right, and there is still a problem with this new hardware (USB/Ethernet), that it is not part of amiga custom chips. And therefore cannot easily be used with OS turned off. In the SAGA chipset, for example, the USB mice and joysticks can still be accessed like the old hardware from $DFF000 address space, and so do not require driver software or OS to work, which is very good. Although the HW support is more limited with this kind of system.

Mice and joysticks being accessed directly by the hardware in two dedicated ports, what not to like, you can then add others usb ports to be used by the system for all the other stuff.

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kolla 
Re: Emu68K + FPGA
Posted on 5-May-2025 12:11:58
#14 ]
Elite Member
Joined: 20-Aug-2003
Posts: 3435
From: Trondheim, Norway

@coder76

Any FPGA board to use with Minimig and Emu68/RaspberryPi will also have legacy 9-pin ports for joysticks and dedicated USB ports for mouse/kbd, just like MiST and all its clones.

As for SAGA, 13th of May 2017, at 18:38 CEST, Gunnar announced that SAGA will be open source. Last I asked him on this, on this very forum, his reply was “when it is done".

https://amigaworld.net/modules/newbb/viewtopic.php?topic_id=44581&forum=15&start=560&viewmode=flat&order=0#855985

In classic Gunnar fashion, the thread in which his announcement was made, appears to have been deleted, it’s still there in google’s cache though (for those who know how to access it these days) and we do of course have screenshots.

Last edited by kolla on 05-May-2025 at 12:25 PM.
Last edited by kolla on 05-May-2025 at 12:24 PM.
Last edited by kolla on 05-May-2025 at 12:23 PM.

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coder76 
Re: Emu68K + FPGA
Posted on 5-May-2025 19:56:57
#15 ]
Member
Joined: 20-Mar-2025
Posts: 19
From: Finland

@pixie

Ok, thanks for the clarification, but some ideas how to integrate new hardware into custom chip address space are still needed, as USB hardware can have different functionality than old Amiga mice and joysticks, like a scrollwheel, and more joystick buttons. In SAGA these have new HW registers 'Mouse Wheel' and joybuttons1-4.

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coder76 
Re: Emu68K + FPGA
Posted on 5-May-2025 20:03:12
#16 ]
Member
Joined: 20-Mar-2025
Posts: 19
From: Finland

@kolla

Quote:

kolla wrote:
Any FPGA board to use with Minimig and Emu68/RaspberryPi will also have legacy 9-pin ports for joysticks and dedicated USB ports for mouse/kbd, just like MiST and all its clones.

As for SAGA, 13th of May 2017, at 18:38 CEST, Gunnar announced that SAGA will be open source. Last I asked him on this, on this very forum, his reply was “when it is done".

https://amigaworld.net/modules/newbb/viewtopic.php?topic_id=44581&forum=15&start=560&viewmode=flat&order=0#855985

In classic Gunnar fashion, the thread in which his announcement was made, appears to have been deleted, it’s still there in google’s cache though (for those who know how to access it these days) and we do of course have screenshots.


Ok, I see the problem with Gunnar. But can you tell me, how does the keyboard work in these FPGA boards, can you control it like the old Amiga keyboard, which uses CIA chips + interrupt to control the keyboard.

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Mobileconnect 
Re: Emu68K + FPGA
Posted on 5-May-2025 20:43:07
#17 ]
Cult Member
Joined: 13-Jun-2003
Posts: 507
From: Unknown

@coder76

the keyboard is not controlled

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agami 
Re: Emu68K + FPGA
Posted on 6-May-2025 2:00:53
#18 ]
Super Member
Joined: 30-Jun-2008
Posts: 1930
From: Melbourne, Australia

@Karlos

Quote:
Karlos wrote:
https://x.com/Claude1079/status/1878319994129223970

Phwoar.

Signs of imminent p0wnage are not premature or exaggerated.

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kolla 
Re: Emu68K + FPGA
Posted on 6-May-2025 6:33:03
#19 ]
Elite Member
Joined: 20-Aug-2003
Posts: 3435
From: Trondheim, Norway

@coder76

Quote:

But can you tell me, how does the keyboard work in these FPGA boards, can you control it like the old Amiga keyboard, which uses CIA chips + interrupt to control the keyboard.


https://github.com/minimig-dev/MinimigAGA-MiST-TC64/blob/9e8e30844fe134dca54cea65f1bd38539dfc15ad/rtl/minimig/amiga_keyboard.v#L77

https://github.com/minimig-dev/MinimigAGA-MiST-TC64/blob/9e8e30844fe134dca54cea65f1bd38539dfc15ad/rtl/minimig/ciaa.v#L24

https://github.com/minimig-dev/MinimigAGA-MiST-TC64/blob/master/rtl/minimig/ciaa_ps2keyboard.v

What do you reckon?

If your question really is if one can boot a bare bone Minimig system from a floppy with Pinball Dreams and play straight away without having to add any driver stack, like Poseidon USB, then yes - of course!

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OneTimer1 
Re: Emu68K + FPGA
Posted on 6-May-2025 18:15:42
#20 ]
Super Member
Joined: 3-Aug-2015
Posts: 1179
From: Germany

@coder76

Quote:

coder76 wrote:

... as USB hardware can have different functionality than old Amiga mice and joysticks, like a scrollwheel, and more joystick buttons. In SAGA these have new HW registers 'Mouse Wheel' and joybuttons1-4.


Most FPGA Systems don't provide a real USB system that could be used by AmigaOS.

If someone would ask me to make a FPGA Amiga that could use USB keyboards, mice and joysticks I would use a cheap MCU with an OpenSource USB stack it would handle HDMI devices and copy the inputs into some registers compatible with Amiga hardware.

Last edited by OneTimer1 on 06-May-2025 at 06:16 PM.
Last edited by OneTimer1 on 06-May-2025 at 06:16 PM.

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