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by MasterOfGizmo
Mon Nov 19, 2018 9:46 pm
Forum: News & Announcements
Topic: FX68K Cycle accurate 68000 core
Replies: 30
Views: 2630

Re: FX68K Cycle accurate 68000 core

Does that mean that FX CAST comes with the same license as the other replay cores which doesn't allow it to be run on anything but replay hardware?
by MasterOfGizmo
Sun Nov 18, 2018 8:48 am
Forum: News & Announcements
Topic: FX68K Cycle accurate 68000 core
Replies: 30
Views: 2630

Re: FX68K Cycle accurate 68000 core

This core is only a few percent bigger than tg68k and it just runs nicely. That's so cool ...

If you read my replies a few year ago when people were asking for totally accelerated 68k CPU cores i always replied that I am much more interested in a cycle exact core. And now it's there :-)
by MasterOfGizmo
Fri Nov 16, 2018 1:13 pm
Forum: News & Announcements
Topic: FX68K Cycle accurate 68000 core
Replies: 30
Views: 2630

Re: FX68K Cycle accurate 68000 core

- No DMA? (surprised that this seems to be not implemented!) What do you mean by DMA? Or do you mean the bus arbitration? Yes that's missing in tg68k and requires us to just stall the CPU by brute force. But of course that prevents a few things like a proper tas instruction. But it's interesting ho...
by MasterOfGizmo
Fri Nov 16, 2018 11:23 am
Forum: MiST
Topic: Trouble with swedish TOS
Replies: 4
Views: 646

Re: Trouble with swedish TOS

Tha ROM just works here. Make sure you setup an STE under Video/Chipset as TOS 1.62 will not run on an ordinary ST.
by MasterOfGizmo
Tue Nov 13, 2018 8:56 pm
Forum: MiST
Topic: Trouble with swedish TOS
Replies: 4
Views: 646

Re: Trouble with swedish TOS

Can you provide a link to that version?
by MasterOfGizmo
Tue Nov 13, 2018 8:54 pm
Forum: MiST
Topic: MiST core and firmware changelog
Replies: 73
Views: 39308

Re: MiST core and firmware changelog

Ram may indèed be an issue.

But one thing that might be easy to add is a way to load multiple roms automatically if they match a pattern like corename0.bin, corename1.bin ...
by MasterOfGizmo
Fri Nov 02, 2018 2:34 pm
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 789
Views: 88284

Re: Genesis / Megadrive core ported to MiST

As slingshot said: This is several hours of work for just two games ...
by MasterOfGizmo
Fri Nov 02, 2018 12:29 pm
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 789
Views: 88284

Re: Genesis / Megadrive core ported to MiST

That's the problem with interlaced modes. It's not really trivial to expand them to VGA. A simple scan doubler with a one line offset between both half images will result in flicker. For more complex flicker fixing we don't have sufficient internal FPGA memory. On the other hand: Interlaced modes ar...
by MasterOfGizmo
Wed Oct 31, 2018 1:50 pm
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 789
Views: 88284

Re: Genesis / Megadrive core ported to MiST

I am still trying to get the Sega guys at sega-16.com interested. But they have an interesting forum. You need to earn points by posting before you are allowed to post anything ... anyone here already have a working account there?
by MasterOfGizmo
Wed Oct 31, 2018 10:03 am
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 789
Views: 88284

Re: Genesis / Megadrive core ported to MiST

But you could use a megadrive->USB adapter with a megadrive pad and the MIST.
by MasterOfGizmo
Sun Oct 28, 2018 8:53 am
Forum: MiST
Topic: The last MIST
Replies: 127
Views: 25562

Re: The last MIST

You're welcome. Hope you still enjoy the device.
by MasterOfGizmo
Sat Oct 27, 2018 5:02 pm
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 789
Views: 88284

Re: Genesis / Megadrive core ported to MiST

That's sufficient. So there's one point where the ipl is evaluated.
by MasterOfGizmo
Sat Oct 27, 2018 4:58 pm
Forum: MiST
Topic: Default folder for roms in some cores... need some help
Replies: 3
Views: 584

Re: Default folder for roms in some cores... need some help

Imho the folder name always is the name displayed on the left side of the osd.
by MasterOfGizmo
Thu Oct 25, 2018 4:44 pm
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 789
Views: 88284

Re: Genesis / Megadrive core ported to MiST

The 68K has no concept of interrupt priority. That must be handled by an external interrupt controller. The CPU only sees a current interrupt request level. There is a precise cycle where the CPU latches the current IPL. If the IPL changes before that cycle it will be honored, otherwise it will be ...
by MasterOfGizmo
Thu Oct 25, 2018 12:33 pm
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 789
Views: 88284

Re: Genesis / Megadrive core ported to MiST

Interrupts on the 68K are level triggered, except NMI (level 7) that is edge triggered. That means that if the interrupt mask is lower than the level currently present on the IPL signals, the CPU will trigger an interrupt disregarding the past events. Only the current state matters. So I now consid...
by MasterOfGizmo
Thu Oct 25, 2018 8:56 am
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 789
Views: 88284

Re: Genesis / Megadrive core ported to MiST

I also tried with a clone Megadrine 6 buttons pad in DB9 port but doesn't use all buttons, only and A&B The support for more buttons on a real 6 button megadrive requires special hardware. If you plug it into a C64 or Amiga that also would only see two buttons. But you should be able to use one...
by MasterOfGizmo
Wed Oct 24, 2018 7:56 am
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 789
Views: 88284

Re: Genesis / Megadrive core ported to MiST

Televicious wrote:Will definitely post some youtube videos when I get proper controllers for this.


This is very welcome! BTW: Any gamepad with at least four buttons should do.
by MasterOfGizmo
Tue Oct 23, 2018 8:36 pm
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 789
Views: 88284

Re: Genesis / Megadrive core ported to MiST

He was imho talking about a non-linearity (image narrowed on the right side only). The left shift is something I fixed this morning. But since not all screens are equal there may not be that magic setting that works for all of us. But all screens I've seen so far had the image slightly shifted to th...
by MasterOfGizmo
Tue Oct 23, 2018 1:36 pm
Forum: MiST
Topic: USB floppy disk unit ?
Replies: 5
Views: 464

Re: USB floppy disk unit ?

We know how the ST floppy works. But USB floppy drives come with a lot of internal intelligence and they do all the low level stuff themselves. Thus they can only read what they were designed to read. And that's usually DOS/FAT formatted 3.5" 1.44MB HD floppy disks. Some of them can read 720k D...
by MasterOfGizmo
Tue Oct 23, 2018 11:58 am
Forum: MiST
Topic: USB floppy disk unit ?
Replies: 5
Views: 464

Re: USB floppy disk unit ?

It's very unlikely, as USB FDDs are designed for PCs and use different format (720kB) than Amiga (880kB). This would in theory work for the Atari ST core since the Atari ST disks are basically DOS formatted. But these USB drives are unable to read e..g amiga disks. For that you'd need a kryoflux or...
by MasterOfGizmo
Tue Oct 23, 2018 11:28 am
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 789
Views: 88284

Re: Genesis / Megadrive core ported to MiST

LarsDragon wrote:I should have consulted first those who sold it to me. I contact him as soon as possible, if I know something I will comment it. Thank you.


Excellent, thanks a lot. Looking forward to hear from them.
by MasterOfGizmo
Tue Oct 23, 2018 10:01 am
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 789
Views: 88284

Re: Genesis / Megadrive core ported to MiST

OK thanks. I thought it was a general problem. :roll: I actually don't know. But the people who sold you the hardware should be the first ones to ask for help. You seem to expect that we are supposed to fix all the general problems and provide you with updated cores and that the makers of your boar...
by MasterOfGizmo
Tue Oct 23, 2018 9:52 am
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 789
Views: 88284

Re: Genesis / Megadrive core ported to MiST

The problem is that the initialization code has a bug, and it creates a GLUE effect that the programmer didn't expect. I described the behavior long ago when no ST emulator could run Enchanted Land properly. I think that was the point where i gave up. It does some switching inside some interrupt he...
by MasterOfGizmo
Tue Oct 23, 2018 8:19 am
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 789
Views: 88284

Re: Genesis / Megadrive core ported to MiST

Sorgelig wrote:Btw, if DTACK is not asserted real 68K inserts one wait clock cycle till it will be asserted. Here it inserts the whole bus cycle (4 clock cycles).


I just commited a patch to fix that.
by MasterOfGizmo
Tue Oct 23, 2018 8:17 am
Forum: MiST
Topic: Genesis / Megadrive core ported to MiST
Replies: 789
Views: 88284

Re: Genesis / Megadrive core ported to MiST

Gehstock wrote:Please contact Mistica Support


:D

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