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#1 |
Registered User
Join Date: Sep 2006
Location: Thunder Bay, Canada
Posts: 4,323
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New Universal Agnus 8372, 75 etc
Hi All, here is another project working on, pretty well all done...
![]() here is a link... We have changed the FPGA due to unavailability https://www.buffee.ca/a-little-side-project/ Plug and play, will dropright into the PLCC socket Near instant-on (CPLD-like) functionality 16MB of 133MHz, 8-bit pSRAM for AGA+ bandwidth 1MB, 2MB Agnus and 2MB Alice compatibility Jumpered NTSC/PAL default modes (will also obey pin and software changes) Automatic 8372 and 8375 pin detection (universal socket compatibility) Many optional features to come There is news on Buffee as well that we’ll post in coming days. Thanks! https://github.com/nonarkitten/amiga...v0.5-(ReAgnus) Last edited by kipper2k; 03 September 2022 at 20:19. |
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#2 |
Moderator
Join Date: Jan 2002
Location: Chicago, IL
Posts: 3,456
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Nice!
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#3 |
Registered User
Join Date: Feb 2015
Location: Sweden
Age: 50
Posts: 3,009
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New Universal Agnus 8372, 75 etc
All hail the Canadian wizards
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#4 |
Italian Amiga Zealot
Join Date: Jan 2009
Location: Italy
Age: 36
Posts: 1,927
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One step closer to being able to build entirely new Amigas (and also save some old ones
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#5 |
Registered User
Join Date: Oct 2021
Location: England
Posts: 1,332
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love stuff liek this, and yeah it would be nice to be able to build whole new units with updated parts, perhaps 1 day on custom motherboards with the updated replacement chips and have modern ports, hdmi/etc.
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#6 |
Registered User
Join Date: Jul 2015
Location: The Netherlands
Posts: 3,464
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Very interesting stuff. Seems it can be put in a 'compatible' mode as well where it just does what the system would normally have, which is great stuff - best of both worlds really, options for authentic behaviour and options for a bit more oomph for those who want it
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#7 |
Registered User
Join Date: Oct 2007
Location: ManCave, Canada
Posts: 1,676
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@ kipper2k
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#8 |
Registered User
Join Date: Aug 2014
Location: Netherlands
Posts: 703
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Looks really nice. I just love how you made a plcc chip out of a PCB
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#9 |
Registered User
Join Date: Jan 2020
Location: oslo/norway
Posts: 1,645
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Love it
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#10 |
Registered User
Join Date: Dec 2015
Location: USA
Posts: 3,009
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Awesome!
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#11 |
Registered User
Join Date: Sep 2006
Location: New Sandusky
Posts: 949
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#12 |
Thalion Webshrine
Join Date: Jan 2004
Location: Oxford
Posts: 14,655
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Sounds interesting. Not only the Agnus/Alice but the RAM as well? Similar to a MultiMega?
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#13 |
Ex nihilo nihil
Join Date: Oct 2017
Location: CH
Posts: 5,155
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Whaou
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#14 | |
MI clan prevails
Join Date: Jul 2010
Location: Belgrade, Serbia
Posts: 1,443
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Quote:
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#15 |
Registered User
Join Date: Sep 2013
Location: Poland
Posts: 888
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Am I right it is GW1NR9 FPGA from GOWIN (China)?
I'm afraid there'd be plenty of problems going above 2MB chip ram. But overall it's good solution for A500 rev6 users which have hard time getting affordable superfat agnus with chip memory mod. But... will there be a version which works with A1000 and rev5 A500? Also - am I wrong about Alice having just 16bit memory interface? How will it work with 32bit AGA chipset which seems to be controlled by both Alice and Budgie? |
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#16 | |
Registered User
Join Date: Sep 2006
Location: Thunder Bay, Canada
Posts: 4,323
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Quote:
edit, i just looked at price of that gowin, i dont think anyone would buy an agnus with that chip, (Isee prices of $300 + for that chip, ouch! Last edited by kipper2k; 04 September 2022 at 18:27. |
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#17 |
Registered User
Join Date: Sep 2013
Location: Poland
Posts: 888
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Oh, I see. ICE65 with 2x external 4bit PSRAM if I'm reading schematics correctly. And that's because when all banks are powered from 3.3V it makes I/O 5V tolerant so it doesn't require additional level shifters?
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#18 |
Registered User
Join Date: Sep 2006
Location: Thunder Bay, Canada
Posts: 4,323
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#19 | |
Registered User
Join Date: Sep 2013
Location: Poland
Posts: 888
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Quote:
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#20 |
Registered User
Join Date: Sep 2006
Location: Thunder Bay, Canada
Posts: 4,323
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problem is ice65 is no longer sold and supported, and as yet it hasnt had a good smoke test hence the reason for not releasing info for it. We are early in Dev so as they say time will tell
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