Search found 67 matches

by ex68k
Wed Jan 16, 2019 1:02 pm
Forum: MiSTer
Topic: 6888x cores
Replies: 2
Views: 193

Re: 6888x cores

bhamadicharef wrote:Any interest or need to implement the Motorola 6888x floating point coprocessor ?
Brahim @ Singapore


Just go for it, an complete working 68882 would be nice ;-)
by ex68k
Fri Jan 11, 2019 3:17 pm
Forum: MiSTer
Topic: 680x0 cores
Replies: 67
Views: 6453

Re: 680x0 cores

MasterOfGizmo wrote:You are basically asking a few guys perfectly restoring some very aged motorcycle how fast it could go if you'd run it on nitro.


I LOVE that one ! :thumbs:
by ex68k
Fri Jan 11, 2019 2:59 pm
Forum: MiSTer
Topic: Minimig RTG possible?
Replies: 45
Views: 1440

Re: Minimig RTG possible?

It's kind of frustrating that pretty much alive Amiga community cannot find self-motivated HDL developer to perfect the Minimig. There are some people working on it, but very slowly, and they got tired of the discussion around it, so they just continue in the dark, before showing anything. It is re...
by ex68k
Fri Jan 11, 2019 2:54 pm
Forum: MiSTer
Topic: Minimig RTG possible?
Replies: 45
Views: 1440

Re: Minimig RTG possible?

I didn't get why DDR3 cannot be used in Amiga memory space. I don't know what's the requirement of video hardware for Picasso96. If it's just plain video buffer mapped at some address space then ist's very easy to implement. If it requires some hardware acceleration like blitter then i need to see ...
by ex68k
Fri Jan 11, 2019 2:52 pm
Forum: MiSTer
Topic: Minimig RTG possible?
Replies: 45
Views: 1440

Re: Minimig RTG possible?

I suppose there is still an aversion to open source work, or concern that somebody will take an open source project and try to commercialize it without contributing (which has happened with earlier versions of Minimig).. Specially, when you get asked for help, getting the commercial version to work...
by ex68k
Wed Jan 09, 2019 12:56 pm
Forum: MiSTer
Topic: 680x0 cores
Replies: 67
Views: 6453

Re: 680x0 cores

I'm fairly new to FPGA's so I'd love to learn a bit more. :coffe: :?: When would you choose to use a more expensive FPGA like a Kintex instead of a Spartan, or an Arria instead of a Cyclone if not on the basis of speed? OK, I'll try again. What you should do: a.) buy a cheap FPGA Eval board. b.) Pu...
by ex68k
Sun Jan 06, 2019 2:37 pm
Forum: MiSTer
Topic: 680x0 cores
Replies: 67
Views: 6453

Re: 680x0 cores

Man, you are tempting your luck with that kind of irony and being unfriendly. I suggest you go ask those questions somewhere else. @PurpleMelbourne: there is actually a forum for you, look for the "makers" of the 68080. They will explain to you in great detail, that the "fictional&qu...
by ex68k
Sat Jan 05, 2019 5:35 pm
Forum: MiSTer
Topic: X68000 core
Replies: 43
Views: 9858

Re: X68000 core

Sorgelig wrote:Still cells aren't equal between different manufacturers.

Still more important: what does synthesis & p&r does with them.

So, he should just try to compile it. Then he really knows ...
by ex68k
Sat Dec 29, 2018 6:37 pm
Forum: MiSTer
Topic: 680x0 cores
Replies: 67
Views: 6453

Re: 680x0 cores

PurpleMelbourne wrote:If there is a 68000 or 68010 core which is faster than 68080 then I'll be happy to try it

Thought about it again, and don't like the "faster" at all ;-)
Get a correct core with all the original (MMU, FPU) bells & whistles, then we can speed it up.
by ex68k
Sat Dec 29, 2018 2:55 pm
Forum: MiSTer
Topic: 680x0 cores
Replies: 67
Views: 6453

Re: 680x0 cores

I think we care here more for accuracy than for speed. They are almost mutually exclusive attributes. Accuracy of existing 68k members first from bottom up ('00, '10, '20, '30, FPU) Speed is second. If you like to have many systems running, accuracy is important, if you like to have just one or two...
by ex68k
Fri Dec 28, 2018 3:06 pm
Forum: MiSTer
Topic: 680x0 cores
Replies: 67
Views: 6453

Re: 680x0 cores

PurpleMelbourne wrote:So aside from the Apollo 68080, what is the fastest OpenCore for 68k family?


Clock or Dhrystone? And, '00, '10, '20, '30?
Businterface?

I guess, you have to try it yourself, for the board you have ...
by ex68k
Sun Dec 02, 2018 1:35 pm
Forum: MiSTer
Topic: 680x0 cores
Replies: 67
Views: 6453

Re: 680x0 cores

fpgaarcade wrote:This week I hope. I've been running comparisons with the fx68k design when the core is in 68000 mode. There are some minor differences in stackframes I would like to fix, but I think it's good enough.


Still fighting the stackframes? Or did real live get in the way?
;-)
by ex68k
Fri Oct 26, 2018 7:06 pm
Forum: MiSTer
Topic: 680x0 cores
Replies: 67
Views: 6453

Re: FX CAST Atari ST core

I've finished adding the missing instructions to my m68k (tg68k) variant. It's still undergoing testing but meetings timing and runs. I'm trying to fix some of the stack frames then I'm done and will switch efforts to the new core. This will go on git shortly. Intersting! Any Idea, when you will pu...
by ex68k
Fri Oct 26, 2018 7:04 pm
Forum: MiSTer
Topic: 680x0 cores
Replies: 67
Views: 6453

Re: 680x0 cores

fpgaarcade wrote:I'm also looking at the fast (-2) spartan7 to get decent HDMI speeds out of it, and there is quite a jump between the -1 and -2 speed grades.
/Mike


Just get an Artix, and go DisplayPort ...
by ex68k
Wed Jan 24, 2018 9:18 am
Forum: MiST
Topic: The last MIST
Replies: 127
Views: 29849

Re: The last MIST

It's true, an FPGA board is to some extent independent from its cores. The MiST was developed exclusively for the ST core at first, but like Minimig the core can be ported and thrive in other boards. That said, one needs a motivated core developer to carry the torch. The MIST innovated in many aspe...
by ex68k
Sun Jan 07, 2018 4:14 pm
Forum: MiSTer
Topic: SDRAM+SRAM board (only concept for now)
Replies: 12
Views: 1737

Re: SDRAM+SRAM board (only concept for now)

I also know many smart words :) The difference between knowing some terms, and making a real hardware is huge. Good luck to find SSRAM in TSOP or similar soldering iron friendly package and make it run at 200MHz on MiSTer module ;) I even don't say about price. Well... technically... 167MHz and TQF...
by ex68k
Sat Jan 06, 2018 6:44 pm
Forum: MiSTer
Topic: SDRAM+SRAM board (only concept for now)
Replies: 12
Views: 1737

Re: SDRAM+SRAM board (only concept for now)

If you want to achieve the highest speed, SSRAM is IMHO much better than old async SRAM. But you will still get, at least, one cycle lattency. This FPGA is too slow for reading on the very same cycle at very high frequencies. But it is one cycle latency on a memory controller, which runs 150-200 MH...
by ex68k
Wed Dec 27, 2017 10:39 pm
Forum: MiSTer
Topic: No Atari ST core?
Replies: 13
Views: 2428

Re: No Atari ST core?

[ So why is there a section for MiSTer on this Atari 16/32 bit forum then?? :shrug: Especially as it's under FPGA-clones, but ... there is no 16-bit Atari core for it so it's not an Atari clone and seemingly never will be? Never say never ;-) Some people are just focusing on the cpu first, then the...
by ex68k
Wed Dec 27, 2017 10:26 pm
Forum: MiSTer
Topic: MiSTer: MiST on Terasic DE10-nano board.
Replies: 760
Views: 133813

Re: MiSTer: MiST on Terasic DE10-nano board.

Sorgelig, while I'm here.. I haven't finished my 68000 cycle accurate code yet, and my new core is system verilog based. As a stop-gap, I've re-written and tidied up the TG68K (renamed as M68K so I can track it). It's in regression testing now. Ping me and I'll send you a copy for testing as soon a...
by ex68k
Wed Dec 27, 2017 10:24 pm
Forum: MiSTer
Topic: MiSTer: MiST on Terasic DE10-nano board.
Replies: 760
Views: 133813

Re: MiSTer: MiST on Terasic DE10-nano board.

fpgaarcade wrote:Off topic, but Replay2 has a large 28nm Spartan7 device on board plus all the usually goodies - high quality analog video/audio as well as dvi/hdmi.
DDR1 memory of compatibility with the current board + 512MB DDR3.


So Spartan7 or Cyclone V ?
Does it really change every day?
by ex68k
Wed Dec 20, 2017 11:11 pm
Forum: MiST
Topic: Mist expansion (in theory)
Replies: 6
Views: 1125

Re: Mist expansion (in theory)

This question is only theoretical. Hopefully FPGA development won't get abandoned for the MISTer only. I thought about the Vampire cards for the Amiga 600. Lacking a card slot (obviously) on the MIST, what in theory could expand it's power and functionality? Could a hobbyist pcb with the right conn...
by ex68k
Wed Dec 20, 2017 7:52 pm
Forum: MiSTer
Topic: Vectrex core
Replies: 17
Views: 2348

Re: Vectrex core

Grabulosaure wrote:Hello.
Here is a little update for the Vectrex core.
http://temlib.org/pub/mister/


Thanks, it is a nice one. Always wanted a vectrex for myself ;-)
by ex68k
Wed Dec 20, 2017 7:49 pm
Forum: MiSTer
Topic: Building Linux kernel
Replies: 48
Views: 9226

Re: Building Linux kernel

bernouilli wrote:I tried with linaro gcc 7.2.1 (latest) and with the original defconfig and the kernel boots.
So thumb2 option is a problem for gcc 5.4


Yup, works for me too ...
by ex68k
Fri Dec 15, 2017 2:32 pm
Forum: MiSTer
Topic: Building Linux kernel
Replies: 48
Views: 9226

Re: Building Linux kernel

I'm trying to compile linux kernel without success. sudo apt install liblz4-util sudp apt install device-tree-compiler Then I enter the Linux-Kernel_4.5.0_MiSTer directory and do : export ARCH=arm export CROSS_COMPILE=arm-linux-gnueabihf- make mrproper make de10-nano_minimal_defconfig make zImage I...
by ex68k
Fri Dec 15, 2017 2:26 pm
Forum: MiSTer
Topic: Testing: Support for more HDMI resolutions and other changes.
Replies: 40
Views: 5025

Re: Testing: Support for more HDMI resolutions and other changes.

Lite revisions of ZX and BK0011M cores also have HDMI video. It uses simple scan doubling/tripling/quadrupling depending of original and screen resolutions using my new HDMI_Lite module. You can see a sharper picture in Lite revision but picture may not fill the full screen and can be narrower or w...

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