Search found 108 matches

by Grabulosaure
Wed May 13, 2020 5:49 pm
Forum: MiSTer
Topic: X68000 core
Replies: 122
Views: 38811

Re: X68000 core

SASI HDD images [...] . Hello. I've made a preliminary version of the X68000 core that directly uses MiSTer framework for HDD (instead of the NIOS software and second SD card). Select the disk image then "Hard Disk : MiSTer" http://temlib.org/pub/mister/release-F68kMiSTer.rbf http://temlib.org/pub/...
by Grabulosaure
Sun Apr 26, 2020 5:30 pm
Forum: MiSTer
Topic: ao486
Replies: 238
Views: 46849

Re: Introduction and first Question (AO486)

No luck, sorry! AO486 is afaik the only core that needs a paying version of Quartus to generate the .RBF, because it uses some non-free IPs blocks in the Qsys project. You can still generate a .BIT file and directly download the FPGA. There are the IPs below : - ALTERA_CLOCK_BRIDGE (x2) - ALTERA_ADD...
by Grabulosaure
Sat Apr 18, 2020 12:22 pm
Forum: MiSTer
Topic: Custom Video Modes Test Thread
Replies: 103
Views: 29608

Re: Custom Video Modes Test Thread

MemTest always have problem still with Vga_scaler=0 If you set vga_scaler=0, then the video on the analog IO board is the native output of the core and videomode is used for the HDMI output only. if you set vga_scaler=1, the scaler output is redirected to the analog IO board. Did you try vga_scaler...
by Grabulosaure
Sat Apr 18, 2020 12:31 am
Forum: MiSTer
Topic: Custom Video Modes Test Thread
Replies: 103
Views: 29608

Re: Custom Video Modes Test Thread

Hi guys..Great Thread! Thanks everyone... When the scaler is disabled, the cores native refresh frequency is used, e.g. 50Hz or 60Hz for game consoles. AO486 generates signals suitable for VGA monitors, which higher refresh rate and horizontal frequency. Most preset video modes expect high resoluti...
by Grabulosaure
Fri Apr 03, 2020 11:50 pm
Forum: MiSTer
Topic: Custom Video Modes Test Thread
Replies: 103
Views: 29608

Re: Custom Video Modes Test Thread

i didn't explore DDC wiring more precise. May be it's possible to get the EDID, so at least in Menu core it can be added if possible. I've tried to get access to display EDID through a serial port to I2C bridge added to the Menu core. https://github.com/Grabulosaure/Menu_MiSTer http://temlib.org/pu...
by Grabulosaure
Thu Feb 27, 2020 10:10 pm
Forum: MiSTer
Topic: Newbie with FPGA and MiSTer dev question
Replies: 22
Views: 3246

Re: Newbie with FPGA and MiSTer dev question

For tests, if you already generate a video output (with positive sync), this code can insert on the top of the screen 2 lines of hex numbers, which can be sometimes useful for debugging: ovo.vhd -------------------------------------------------------------------------------- -- Overlay -------------...
by Grabulosaure
Mon Feb 24, 2020 9:30 pm
Forum: MiSTer
Topic: Custom Video Modes Test Thread
Replies: 103
Views: 29608

Re: Custom Video Modes Test Thread

whats best for 1280 by 1024? Standard 1280x1024 @60Hz ? video_mode=4 That's in mister.ini help comments. There is also the possibility of dumping the screen EDID with a PC and create a mode matching exactly one of the screen supported resolutions. This would be useful to find modes that my monitor ...
by Grabulosaure
Sat Feb 08, 2020 12:41 pm
Forum: MiSTer
Topic: Suggested feature: "Time Sleuth" MiSTer core to test display latency
Replies: 4
Views: 1734

Re: Suggested feature: "Time Sleuth" MiSTer core to test display latency

This could also be a nice use case for the serial io port on the io board. A usb 3.0 cable spliced to one of these sensors and the end user just needs to plug it in and run a measurement core. WARNING There is a 5V power supply on the IO USB connector. The FPGA inputs only support up 3.3V LVTTL sig...
by Grabulosaure
Fri Feb 07, 2020 1:48 am
Forum: MiSTer
Topic: Filters for Scaler
Replies: 54
Views: 16476

Re: Filters for Scaler

Thanks for the reply! This test core looks very useful, but would you indulge me for some small feature requests/changes? - It would be nice if the input/output resolutions which is currently in the top left could be centered. - Also in some color other than white, to be visible on top of white pat...
by Grabulosaure
Thu Feb 06, 2020 9:34 pm
Forum: MiSTer
Topic: Filters for Scaler
Replies: 54
Views: 16476

Re: Filters for Scaler

Here is a test core which helped during scaler development : http://temlib.org/pub/mister/AscalTest.rbf https://github.com/Grabulosaure/AscalTest_MiSTer This core can adjust input and output image sizes, select different patterns and filters. MiSTer internal screenshot function copies the image fed...
by Grabulosaure
Thu Jan 30, 2020 8:30 pm
Forum: MiSTer
Topic: Custom Video Modes Test Thread
Replies: 103
Views: 29608

Re: Custom Video Modes Test Thread

uigiflip wrote:whats best for 1280 by 1024?
Standard 1280x1024 @60Hz ?

Code: Select all

video_mode=4
That's in mister.ini help comments.

There is also the possibility of dumping the screen EDID with a PC and create a mode matching exactly one of the screen supported resolutions.
by Grabulosaure
Thu Jan 30, 2020 12:26 am
Forum: MiSTer
Topic: Filters for Scaler
Replies: 54
Views: 16476

Re: Filters for Scaler

Yes, phases are just truncated. I've tried rounding once but it didn't really change much, just that the banding that appears sometimes with non integer scaling is a bit different. ASCAL already supports 32 phases. I have never tried it though. Linear interpolation between phases would require lots ...
by Grabulosaure
Sun Jan 26, 2020 1:07 am
Forum: MiSTer
Topic: FPGA Core that pushes MiSTer
Replies: 13
Views: 2667

Re: FPGA Core that pushes MiSTer

Some tests : Total current (DE10 + wired ethernet + KB + Joystick) Apple2 0.910A INTV 0.920A SMS 0.930A C64 0.940A Menu 0.950A SNES 0.950A 1942 0.950A Gameboy 0.960A Genesis 0.970A MacPlus 0.970A MemTest@70 0.970A AO486 1.000A GBA 1.000A MiniMig 1.000A MemTest@160 1.040A ScummVM (Loom) 0.920A I've t...
by Grabulosaure
Wed Jan 22, 2020 11:26 pm
Forum: MiSTer
Topic: Suggested feature: "Time Sleuth" MiSTer core to test display latency
Replies: 4
Views: 1734

Re: Suggested feature: "Time Sleuth" MiSTer core to test display latency

I just learned about this device labeled as "Time Sleuth" that can be used to measure how much display latency is in your TV I really like this idea. What a coincidence, I have just tried to make a module that draws blinking rectangles to measure latency. Uses an Arduino photodiode module as sensor...
by Grabulosaure
Fri Jan 10, 2020 11:22 pm
Forum: MiSTer
Topic: MISTer with RISC-V
Replies: 18
Views: 2853

Re: MISTer with RISC-V

I don't think that Vampire has a compatible MMU either. One "just" have to make a suitable 68040 core for Amiga, Atari, X68000, Macintosh, NeXT... I'm sure it will eventually occur. Mister particularly has incredibly raised the interest in FPGA and the motivation for making FPGA cores. And an HDL im...
by Grabulosaure
Fri Jan 10, 2020 8:41 pm
Forum: MiSTer
Topic: MISTer with RISC-V
Replies: 18
Views: 2853

Re: MISTer with RISC-V

LOL! I am guessing you have very little experience with software based emulations. There is no "trick". The performance is straight across the board. The reality is that FPGA based CPUs are going to be phased out for smaller and substantially cheaper RISC-V type systems. If you do have a small FPGA...
by Grabulosaure
Fri Nov 29, 2019 7:16 pm
Forum: MiSTer
Topic: ao486
Replies: 238
Views: 46849

Re: ao486 Performance Technical Discussion

"Dirty" means that the data in the corresponding page has been modified, the CPU has made at least one write into that 4kB area. During the first write into a "clean" page, The TLB must be updated, but also the page table entry in RAM, maybe ao486 does a forced TLB miss to trigger a "tablewalk" oper...
by Grabulosaure
Mon Oct 28, 2019 11:37 am
Forum: MiSTer
Topic: SDRAM board
Replies: 480
Views: 222269

Re: SDRAM board

The reliability really depends on the DE-10 Nano board itself. It's something that I have asked Terasic to look into. I have 128MB SDRAM plug-in modules that I designed as well as the original 128MB design that is in the MiSTer repo. Both designs work fine in three of the five DE-10 Nano boards, pa...
by Grabulosaure
Sun Oct 27, 2019 1:01 pm
Forum: MiSTer
Topic: MISTer (Main Core)
Replies: 344
Views: 103952

Re: MISTer (Main Core)

You can try to change the framebuffer console resolution from the command line, but using reduced colour depth : vmode f rgb16 (The scaler, when used with input video, stores only the source image, high resolution output is generated "on the fly", so it usually it doesn't uses as much memory as the ...
by Grabulosaure
Sun Jun 02, 2019 7:25 pm
Forum: MiSTer
Topic: Scaler
Replies: 406
Views: 95637

Re: Scaler

8bpp palette implemented is not how i've expected. Can you implement palette as block in DDR3 memory laying before the frame buffer? I can make a thingy that does DMA copies to fill palette registers. It could even be used for setting the framebuffer size, format, base address... or anything else. ...
by Grabulosaure
Wed May 29, 2019 11:24 pm
Forum: MiSTer
Topic: Scaler
Replies: 406
Views: 95637

Re: Scaler

When you will be able to finish new format? I have just uploaded a new version with an indexed 8bpp mode (palette). OLD FORMAT[2:0] NEW FORMAT[4:0] "000" 16bits 1555 RGB => 01100 "001" 24bpp RGB => 00101 "010" 32bpp RGB => 00110 "011" 16bits 565 RGB => 00100 "100" 16bits 1555 BGR => 11100 "101" 24b...
by Grabulosaure
Tue May 28, 2019 11:13 pm
Forum: MiSTer
Topic: Scaler
Replies: 406
Views: 95637

Re: Scaler

@Grabulosaure: I found that R/B in 16bit mode are swapped. Also some bits offsets were wrong. I fixed it in my latest Menu commit together with 565 mode. I've fixed it only in output part affecting the framebuffer. Probably input part also needs fixing, although 16bit modes aren't used for core vid...
by Grabulosaure
Fri May 24, 2019 1:07 pm
Forum: MiSTer
Topic: Scaler
Replies: 406
Views: 95637

Re: Scaler

further investigation shown that pll_hdmi_adj is guilty in HDMI initialization problem. Somehow it interfere with ADV7513 configuration. Once i set llena = 0; lltune = 0; i've got Menu core working. Even standard disable lowlat mode from HPS side doesn't prevent the problem. It's not a problem to d...
by Grabulosaure
Thu May 23, 2019 8:03 pm
Forum: MiSTer
Topic: Scaler
Replies: 406
Views: 95637

Re: Scaler

Sorgelig wrote:i've added changes to Ascal for R/B swapping in Menu_MiSTer repository.
You can accept my changes or make your own. Up to you.
Is it really useful to be able to choose the order?
And RGB565 seems a bit more common than RGB555. And there is one extra bit of green paint!
by Grabulosaure
Tue May 21, 2019 11:07 pm
Forum: MiSTer
Topic: Scaler
Replies: 406
Views: 95637

Re: Scaler

Another version ! - RAMBASE as base address in scaler mode. - New signals for the framebuffer mode : o_fb_ena,o_fb_height, o_fb_width (this time actual dimensions :640x400, not 639x399), o_fb_base, o_fb_format - No header in the framebuffer mode. - freeze and triple-buffering don't need to be disabl...

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