Phoenix Nexus FPGA board

All the good stuff hardware and software wise for the Phoenix H5 series motherboards.
User avatar
PhilC
Moderator
Moderator
Posts: 7456
Joined: 23 Mar 2018 20:22

Re: Phoenix Nexus FPGA board

Post by PhilC »

Bungle Blitter
Zippy MMU
George Glue

And you could call the PCB Rainbow :lol:
If it ain't broke, test it to Destruction.
User avatar
exxos
Site Admin
Site Admin
Posts: 28400
Joined: 16 Aug 2017 23:19
Location: UK

Re: Phoenix Nexus FPGA board

Post by exxos »

PhilC wrote: 12 Jul 2025 16:40 And you could call the PCB Rainbow :lol:
:chairsmack:

Nobody even noticed yet the acronym for my new 206 decoder is actually BUGGER :P or something like that.. I foget :lol:
coonsgm
Posts: 451
Joined: 30 Jan 2021 01:30

Re: Phoenix Nexus FPGA board

Post by coonsgm »

I did call out these efforts to replace the custom IC's on my latest YT video

Thank you all for the awesomeness!!
User avatar
exxos
Site Admin
Site Admin
Posts: 28400
Joined: 16 Aug 2017 23:19
Location: UK

Re: Phoenix Nexus FPGA board

Post by exxos »

coonsgm wrote: 12 Jul 2025 17:45 I did call out these efforts to replace the custom IC's on my latest YT video

Thank you all for the awesomeness!!
:bravo: :thanksyellow:
ijor
Posts: 827
Joined: 30 Nov 2018 20:45

Re: Phoenix Nexus FPGA board

Post by ijor »

I'm with a bit of a flu. Can't exactly do high tech stuff at this time. But I keep being amazed by the wisdom and inspiration of this forum. Please continue! :)
http://github.com/ijor/fx68k 68000 cycle exact FPGA core
FX CAST Cycle Accurate Atari ST core
http://pasti.fxatari.com
User avatar
sporniket
Site sponsor
Site sponsor
Posts: 1164
Joined: 26 Sep 2020 21:12
Location: France

Re: Phoenix Nexus FPGA board

Post by sporniket »

Not very original PhœMMU, PhœGLUE, PhœBLIT ; all names truncated to 2 syllabus for better smoothness (PhœBLITTER seems a bit rough). And with a liggatured 'œ' glyph, not "o" followed be "e", of course.

Edit : most likely inspired by Batman and all of his "bat-something" gadgets :D
User avatar
exxos
Site Admin
Site Admin
Posts: 28400
Joined: 16 Aug 2017 23:19
Location: UK

Re: Phoenix Nexus FPGA board

Post by exxos »

All good suggestions.

The hyper blitter is a play on words from Intel's "hyper transport" as the blitter will have a similar feature.
User avatar
exxos
Site Admin
Site Admin
Posts: 28400
Joined: 16 Aug 2017 23:19
Location: UK

Re: Phoenix Nexus FPGA board

Post by exxos »

ijor wrote: 12 Jul 2025 20:23 I'm with a bit of a flu. Can't exactly do high tech stuff at this time.
Hope you feel better soon. My girlfriend and I don't feel great because of the heatwaves in the UK :(
But I keep being amazed by the wisdom and inspiration of this forum. Please continue! :)
:thumbup:
User avatar
exxos
Site Admin
Site Admin
Posts: 28400
Joined: 16 Aug 2017 23:19
Location: UK

Re: Phoenix Nexus FPGA board

Post by exxos »

I'm still working on the PCB in the background. Likley will be next year before anything physical appears..

But I want to also gauge how many alpha boards to produce. I'll either get 5 or 10 made. I can't say on cost. But could may well be around the £200 mark.

It will need testers who are able to remove the MMU, BLITTER, GLUE sockets and fit headers to insert the new FPGA board. The H4 should be easy as users built them. The H5 mostly had leadfree solder, so extra care and skill will be used as to remove the sockets.

The board will replace the MMU, BLITTER, GLUE with @ijor's cores. It should give 14MB ST RAM. So no need for altram. The cores should be able to run at 16mhz and hopefully 32mhz. It will be a true speed boost where ST RAM will also run at faster speeds. That's always been a problem with add-on boosters. But we won't have those issues.

We plan for the BLITTER to run at much faster speeds. Not just limited to whatever the bus speed normally is, EG 8mhz. BLITTER will have direct access to RAM and could be clocked at speeds up to 128mhz.

Myself and @ijor are discussing various other ways we can modify the architecture to make various other speed improvements.

I think the Phoenix platform will soon, and finally, get the High speed dream as realised a few years back :)
User avatar
JezC
Posts: 2788
Joined: 28 Aug 2017 23:44

Re: Phoenix Nexus FPGA board

Post by JezC »

I'd be happy to help with testing.

With a couple of H4 boards and 4x H5 of various versions I should be ok with removing/replacing sockets and fitting headers.

I hope to be able to support you with an alpha board as well...

Return to “PHOENIX ZONE”

Who is online

Users browsing this forum: CCBot and 194 guests