MiSTer FPGA Forum

No idea about which improvement you are talking about. If you force enable composite blend when it applied on full screen, the same Sonic looks very bad. I never used it till adaptive blend was added. Even if sonic gets some benefit from blending in very particular screens, it's not worths to enable it if it cannot detect the places where it has to...

Abusing feature is usually a bad idea. Links on exFAT give some convenience, but making a tons of links isn't good.

While talking how good one particular scene when screen is heavily blurred you completely disregard that wast majority of time it simply render the video as complete crap without any benefits.

MiSTer's Linux is tuned to be embedded Linux. Main purpose is to service the cores. It's not supposed to be a full featured GUI. Main MiSTer function is to play the emulated systems, not launchers. More Linux part popping out -more Linux problems it will bring. You want a full featured Linux with different launchers - use RPi. You really don't need...

MiSTer - originally stands for "MiST on Terasic board". It's no longer such, so just take it as a simple name MiSTer without anything underneath.

It depends on usage. The way MiSTer used is much larger than MiST. MiST simply has no additional functions MiSTer provides. And of course with more different usages you have to learn more. You want to upload files remotely - you need to learn how to use FTP. You want Wallpapers - you need to organize them. You want different HDMI resolutions or eve...

There is some flag in exFAT telling that not all writeable files are closed before unmounting. It doesn't mean corruption. So general guide remains the same. There WON'T be shutdown procedure for MiSTer. But if your config went too far and something constantly is writing to files, then you can invent some specific options like shutdown script. Up t...

it's better to use random numbers only for last 6 digits. First 6 is better to keep static. They not only mean some brand ID but also have flags such as multicast, broadcast.

In MiSTer.ini: video_info=0

Verilog is pretty close to C. If you are long time C developer, then with a little HDL introduction you should be able to read Verilog. Pretty much 1:1 with some adjustments to HDL specifics. Same VHDL is basically Pascal for HDL. If you plan to write in VHDL, then try not to change variable cases, as VHDL being very strict language completely igno...

HDL language needs some sort of size marking as traditional byte/word/dword is not enough. HDL operates by bits, not bytes. So 1'd0 is basically a single bit. Verilog unlike VHDL is more flexible and in many cases you can simply write 0 (or other number). It will be extended (if not ambiguous) to either 1 bit or 10 or 32 - depending on case. Bit ma...

I worked on many VHDL cores and modules. I have no problem to fix and improve them. Just i'm not going to develop core/module in VHDL myself. It's not a problem to write the core in VHDL, but i strongly suggest to keep emu module in SystemVerilog. You don't have to learn Verilog in deep, but you need to understand it in general. Basic HDL concepts ...

It's not all subsequent. Just press reset (USER button) and then load cart - it will work. Some carts may relay on initial ram content and may fail to start without reset.

ok, tried Space Harrier. It loads fine every time i try to load it after core reset. If i try to load it from the game then it doesn't start.

May be someone wo has such issue has more than one SDRAM module and can try different modules?

bazza_12 wrote: ↑Sat Jun 13, 2020 3:19 pm also i noticed that the directory names are case sensitive.

It fully depends on file system. For exFAT it's case insensitive.

dshadoff wrote: ↑Sat Jun 13, 2020 1:58 pm - assigning a smaller data value to a large data value (ie. a 4-bit value into a 6-bit register) may not give you a warning, but also won't likely align as you expected. Beware.

It always assign to lower bits with extending 0 to unassigned bits. There is no other cases.
But verilog won't think for you - that's right

and there is no significant new functionality for our Cyclone 5 added in newer versions anyway. word "significant" is redundant. It simply NO new features for Cyclone V since Quartus ~14. Probably Quartus 15 would be ideal for MiSTer but in earlier version MiSTer used some Altera IPs greatly updated after Q16. In current MiSTer there is ...

One question for the beginning: I will do this in VHDL. Is there any reason why the top file is verilog? Is it just because no one found the need to translate it into vhdl? In other words could I use a hack.vhd instead of the hack.sv (templated version)? Has any core already a vhd implementation of the main file? Weird question. Why it should be i...

Coming from a large-scale C++ software development background, these iteration times are something I'll have to adjust to. Maybe it means I do a lot of work in Verilator first. It also seems like disabling HDMI support does substantially improve iteration time though? Yes, unfortunately long compile times are the norm with MiSTer cores. I have hea...

i think if link is external, it's not a problem to open it in new tab.

Different LED models have different brightness, so it seems the LED used on your board is not suitable for TOSLink purpose.

benitoss wrote: ↑Wed Jun 10, 2020 2:52 pm Thanks for the answer. I appreciate it
Could you give me a core example of your first strategy ?

Regards

It's quite generic work. Many cores do this. Minimig, Atari ST, SAM Coupe, Archie, TS Conf.

Need to see what communication channel is used for RPi. If it's UART then MiSTer already provides this communication, so just need to add linux app servicing Next commands.
AFAIK RPi is optional feature. It has nothing to do with ZX emulation.

if some app/game will change layer 2 position very fast, then you won't have time to re-load layer2 into BRAM. 256x192 is standard Spectrum dot clock 7MHz. SDRAM is 16bit, so every word will be fetched at 3.5MHz. If you will use 2-word burst then fetch will be every 1.75MHz. This is pretty much comfortable access time for SDRAM working at around 11...

MegaCD:
- Adjust OSD options according to latest changes in Main.
attn: don't forget to update Main!

Main: - megacd: don't reset the core and don't loose the save upon disks swap of the same game. attn: for multi-disk games place all files into single folder, so all CUEs of the same game will be in common folder. - minimig: use fast io for HDD transfer. - Fix and tweak bootcore feature. - Per-core volume attenuation (OSD option). - Fix expanded v...

TurboGrafx 16/CD:
- Clear VRAM,RAM,SATB on ROM loading (prevent initial garbage in some games).
- Fix DDR3 controller.
- Implement cache when DDR3 is used. Now DDR3 timings almost as good as SDRAM.

ARM pushes the boot.rom right after core start.
MRA works similarly but rom getting assembled from MAME zip and then pushed to the core also right after the start.

Hacks/Mods/Translations usually have changes only in data track. So you can have cue with separate data track and share all audio track. A lot of space saving.