MiSTer FPGA Forum

I've tried this OSRAM SFH300 phototransistor. Time Sleuth uses 300k resistor.
Due to the very high resistor, rise/fall times are quite slow. It's a bit faster with another NPN transistor as a Darlington.

The GUI with blinking rectangles was added to an existing core, keeping original resolution.
https://github.com/Grabulosaure/Genesis_MiSTer_latency

I have made some experiments with that idea https://misterfpga.org/viewtopic.php?f=33&t=80 https://www.atari-forum.com/viewtopic.php?f=117&t=38261 http://temlib.org/pub/mister/latest.jpg I've made various attempts for finding a suitable sensor, for example a PIN photodiode, a darlington-phototransistor,... but don't have yet a good solution...

There is a serial port interface in the cores (the UART_xxx signals) that you can use for communications with Linux though /dev/ttyS1.

Just published the Thomson MO6 core sources :
https://github.com/Grabulosaure/MO_MiSTer

Current build :
https://github.com/Grabulosaure/MO_MiST ... ses/mo.rbf

So here's a thought... Sparcstations could have up to 512MB ram on the SS20 (or 7x64MB + 8MB VSIMM to enable onboard graphics), there was also an nvsimm slot which could take another ram card out of the picture to provide nonvolatile memory to accelerate NFS etc... , (1GB on the Hyperstation 30), I was reading that nobody had an excuse for more th...

@bigvalen Some cores support networking though serial port (PPP...) : Amiga, AO486. The SparcStation core also has an internal serial port accessible from Linux side, it can be used for the console and hardware debugger ("debug" ARM executable), it could be used for networking. Networking worked on the old Xilinx dev board with had an MII...

Is this HDMI or VGA? It looks like there is some bad scaling going on. Does AGA 1280x720 work better? ScreenGrabbing using win+prtscr doesn't work properly with RTG, I get a file, but it is 1bit grayscale, 1280x241 (running 1280x720) and essentially black. RTG addition to Minimig use the scaler in "framebuffer" mode (this is also used fo...

You can access bits 32 to 63 of the configuration string by using a lowercase "o" instead of uppercase "O".

(examples : GBA, Genesis...)

viewtopic.php?f=33&t=80
https://www.atari-forum.com/viewtopic.php?f=117&t=38261

Typically the analog out port can display "normal" Amiga video (OCS/ECS...) while HDMI will display the RTG output.

@sorgelig @robinsonb5 Besides HSYNC/VSYNC, The DE "Display Enable" is needed for synchronisation (because the scaled image must be aligned with the top or bottom of the input image. The transparent multi-buffering done by the scaler isn't available in framebuffer mode. Many options are available, such as ignoring synchronization and allow...

@robinsonb5 @sorgelig When using vsync_adjust=2, the scaler (actually a separate block in sys) tries to synchronise input video with scaled output. If the framebuffer mode is used, that same block willl still try to synchronize video, even if the "input video" isn't displayed anymore. I don't know how RTG boards work, but if some boards u...

@bootsector My own experience is that each screen behaves differently. video_mode=hp,ha,hb,hc,vp,va,vb,vc,vd,freq Vertical frequency is freq / (hp+ha+hb+hc) / (vp+va+vb+vc) : 60Hz or 50Hz. hp and vp are the desired resolution. ha , hb , hc , va , vb , vc are the sycnhro position and duration. It can sometimes be reduced in order to reduce freq .

@vibes

I'm surprised that it works with such ludicrous over-clocking. You can try to reduce frequency by reducing blanking times, or switch to 50Hz.

If you have Quartus installed, you can recompile the cores, adding in sys/sys_top.v :
after : add the line : And there will be no clipping.

@robinsonb5 The idea is to use the scaler to generate the image. You provide image size, colour depth, base address and a switch to activate the thing and it will display your framebuffer instead of the existing MiniMig core output. This is how the framebuffer mode (F9 from menu) works. (colour depths are 256c indexed, 16bits 565 RGB, 24bits RGB, 3...

It was just a test. @grizzly - Extract the archive - Rename menu.rbf to m.rbf - Copy m.rbf, edid, edid-decode to the SD card. - Launch the new "M" core from MiSTer menu - Type F9 for the console, then "root", "1" for login - Type "cd /media/fat" to get to the SD card root. - Type "./edid a | ./edid-decod...

I once made a version of the menu core with a link to the I2C DDC/EDID interface:
http://temlib.org/pub/mister/edid.tgz

Using the menu core to run "edid" code from MiSTer command line. Screen supported video modes will be listed.

The MiSTer framework can also be used to implement things that are not old games consoles nor computers.

For example Conway's Game Of Life :
https://github.com/hrvach/Life_MiSTer

IIRC 68K first external MMU, MC68451, was almost as wacky as x86 protected mode. Then Motorola went saner, removing features, to eventually leave in MC68040 only things used by UNIXes and MacOS. @xolod79 There is an Ethernet MAC (AMD LANCE based) that used to work with the PHY on the Xilinx board. A direct connection to a MII/RMII PHY (such as LAN8...

@danielb There are old sources available for the Xilinx SP605 board. But many things have changed since then. I would like to clean-up sources and finish SMP mode before releasing them. For those really interested, there is also a debugger ("debug". Ha!) which can be run from MiSTer console (SSH or direct access). The debugger will show b...

Try everything. roll a dice. Read the screen EDID data.
CRTs needed long blanking delays to give time for moving back the spot to top/left. LCD don't have these constraints.
Reduced blanking allows to reduce clock frequency, which is far better for mister HDMI encoder which is officially limited to 165MHz

Using this calculator : https://github.com/kevinlekiller/cvt_modeline_calculator_12 I get : 1920x1440 @60Hz : # 1920x1440 @ 60.000 Hz (CVT) field rate 59.968 Hz; hsync: 89.532 kHz; pclk: 233.50 MHz Modeline "1920x1440_60.00" 233.50 1920 2056 2264 2608 1440 1443 1447 1493 -hsync +vsync video_mode = 1920,136,208,344,1440,3,4,46,233500 1920x...

The PLL takes a few seconds to tune when vsync_adjust=2 is selected. During that time frequency is varying a lot and your TV may show incorrect frequency.

Here is an illustration :
https://www.youtube.com/watch?v=veRuXe2wN0g

I would suggest to do nothing, unless the damaged capacitor is in short-circuit.
These are decoupling capacitors, they are in parallel to reduce noise.

@GammaDev Thank you for testing and reporting issues. These cores needs to be updated to latest fixes from official NES and SMS cores. The one big improvement would be to add 3D-packed frames support. The goal is for the TV to automatically switch between 2D and 3D modes? There seems to be registers in the HDMI transmitter to select 3D images, but ...

@kamshaft For Signetics 2650 stuff (Arcadia, Acetronic MPU & clones), this site is the most complete : http://amigan.yatho.com/ If you are looking for archaic game consoles, Fairchild "Channel F" is still missing : https://en.wikipedia.org/wiki/Fairchild_Channel_F Games are ugly but it's historically significant because it was the fir...

@Moondandy

It's a bit difficult as these cores uses modified versions of the framework and scaler. Requires more work to keep in sync.
I should update these 3D cores anyway.

I would love to see a core for this system. 1292 Advanced Programmable Video System, aka Acetronic MPU 1000, Interton 4000, OC-2000... Here it is : http://temlib.org/pub/mister/C2650.rbf Sources : https://github.com/Grabulosaure/C2650_MiSTer There is an "Interton" mode for this kind of game consoles and an "Arcadia" mode which ...

Thank for your interest. Sources are there : https://github.com/Grabulosaure/Intv_MiSTer It needs to be reworked a bit before being part of "official" cores. There are still a few issues/bugs, but it should support most Intellivision games and homebrews, including "Intellivoice", "Intellicart", "ECS" extensio...

The NES had a similar 3D accessory with LCD glasses. Only sold in Japan. At least 2 games for "Famicom 3D system" had an US version with Red/Blue anaglyph mode : https://en.wikipedia.org/wiki/Rad_Racer https://en.wikipedia.org/wiki/The_3-D_Battles_of_WorldRunner I have made a version of SMS and NES cores for "modern" 3D TV which...