MiSTer FPGA Forum

What takes so long there is the game writing to flash memory, probably to save that the level is done. The game has a counter stored in 0x030061AC that counts down and it exits the save loop once it reached 1. Each time it counts down, it has written one flash address and read it again, probably to check if saving was ok. This process takes 53us pe...

Can reproduce it and will look into.

While it's not really annoying or a big problem, i'm interested what takes so long there.

According to schematics (found here: https://www.terasic.com.tw/cgi-bin/page/archive.pl?Language=English&CategoryNo=205&No=1046&PartNo=4) It is C85. That's a 0,1u, 16V capacitor used for USB Voltage. c85.png I would expect the USB to still function, unless you have a short there or damaged the other Cs, too. But better wait for the expe...

That information is not available anymore, as the pixels are calculated at different time, especially for the sprites.

So the software you used does the effect. Probably something more sophisticated and maybe using more adjacent pixels than just the available 2x2 grid. Without knowing the math behind, we only know that it would be possible to do it with unlimited ressources and random pixel access. Question is, if there is a function that uses only the 2x2 oversamp...

In this case: please tell me what formula you used and maybe i can implement it.

My fomula was just a simple:
- add all 4 pixel
- divide by 4

Yes it only works over HDMI, added it to the readme.

Supersampling would work, but with the low resolution it doesn't work well as it gets very blurry. Made a comparison shot:

Yes, unfortunatly you need a high resolution now for something like the lcd filters. Gamma filters do indeed not work currently. Keep in mind that you can turn the new feature off for games that don't use it and still use all the old features. It's unfortunate, but we probably have to live with the fact that the mode must be adjusted on a game by g...

The background improves mostly in those racing games that don't use bitmap mode/polygons and some other games with rotoscaled background. Scaled and rotated sprites are by far more common. Often one would not realize the difference without switching between both, as it doesn't look unnatural in higher resolution. You probably notice it when you use...

GBA:
- added 2x resolution mode
- updated framework
- improved ddr3 access latency
- 30Hz flickereduce option
- fix soundfifo reset

That would be much easier, but only via direct conneting cable, as the GBA internally expects the answers in realtime, so no Wifi.

There is not enough available logic inside the Mister FPGA and by far too few Memory.

To make this possible, the core would need to be stripped down to a bare minimum, removing most of the optional features.

The effort is just not worth it, when other consoles with native (and usually better) multiplayer options are available right now.

The 3DO has 2 external SRAMs for VRAM, each of them bigger than internal BRam of the Cyclone 5 FPGA. So don't expect a 100% cycle accurate core with the Mister platform, but that's true for most newer consoles.(Gen5+) CPU side looks better, could probably use a stripped down version from the GBA, as it's an older ARM. Overall it should be possible ...

Please try with setting Memory to DDR-Ram, Save settings and reload core. This way it rules out faulty sdram. I don't have an IO Board either. The savestate doesn't help, it's already crashed there. (Programcounter is in BIOS data segment) I still can see where you are, right at the start of the level, as the VRAM and Registers are intact. It's dif...

Have no Idea what that could be, as it's working here.

- Did you really check the MD5? There are bad Bios files on the road.
- Are you using DDRRam or SDRam?
- Are other games/cores working?

Can somebody else verify please?

Works with:
- Current Core Release - 20.05.13
- Ecks vs. Sever (U) (M5) (MD5 - 6E76914FA33B3436079AC16ECF778D15)
- Original Bios (MD5 - A860E8C0B6D573D191E4EC7DB1B1E4F6)
- Pressing B to open first Door/Gate

Please verify these things or tell me what exactly does not work.

My own GB/C core is roughly in the shape of the GBA core at release: it has bugs, it's inaccurate and all the newer features like savestates and cheats are missing. At least it already has working Fastforward. I would really like to work on GB/C again after DS (whenever that will be...) if noone will do it before. However, i feel like this core has...

I developed the GBA core completly in simulation. Only game testing was done on hardware. If a bug occured, it was fixed in simulation. I have a bunch of automatic regression tests, cycle based CPU state dumping and live(~1 frame per minute) graphical output. Bugs deep into the games where fixed with savestates that can be taken on hardware and loa...

Yes rewind capture will pause the core for a few ms every second to take the capture, so this could also lead to this effect.

Please activate "Sync to core" in OSD and report back.

I only tried with the original DE2-115, haven't build it for Mister yet.
Didn't know the sound already improved that much. So forget what i said above.

My first step would be to reduce the amount of logic used by the sound card, which has about the same logic size as the processor and i don't really see why. The core is just too large in the current status to add many improvements. Did someone ever got a simulation of the core running? We could probably find some improvements then. But in the end,...