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Dexx-vd_isl Quick Start Guide 

         VideoGamePerfection.com

Scanlines

Vintage games consoles such as the Sega Megadrive and Nintendo SNES used a special screen 
mode which resulted in alternating lines on a CRT display being left blank. Typically when people 
in the retro-gaming communities refer to scanlines, they mean the blank lines between parts of an 
image on a CRT that were a result of this screen mode. DExx allows you to simulate these 
scanlines, making the image look more authentic. You can enable or disable post-processing 
scanlines on the DExx by pressing the Menu button on the remote and navigating to “Scanline opt.”

You can also configure scanline strength by using the Scanline Int button on the remote. 

In scaler mode, the DExx also supports custom scaling algorithms (see page 20 for more 
information). Some of these may add scanlines to the image as the image is scaled. In this case, 
post-processing scanlines should be turned off.

How pronounced the scanlines would look on a real CRT varies greatly between displays, so set the 
scanline strength to your taste.

Setting output resolutions

In line multiplication mode the DExx takes in one scanline and outputs two or more, resulting in a 
lag free conversion of 240p to 480p, 720p or higher. 

To change the line multiplication output resolution, press the Menu on/off button so that the on 
screen menu is displayed and use the back button if necessary to navigate to the top menu. Select 
“Line multiplier opt” and press “OK”. The menu shown below will be displayed.

Choose “Pure LM opt.” or “Adaptive LM opt.” depending on the mode you are in, for this example 
we will assume adaptive mode. The menu shown below will then appear.

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Summary of Contents for DExx-vd-isl

Page 1: ...d_isl Quick Start Guide This document is copyright VGP Media Ltd 2022 All rights reserved worldwide VideoGameperfection com is a trading name of VGP Media Ltd Registered in Republic of Ireland number...

Page 2: ...ne scaler three modes 16 Changing modes 17 Connecting a console PCB or other hardware 17 Scanlines 18 Setting output resolutions 18 Framelock 20 Scaling algorithm 20 Interlace video and the DExx 20 Fi...

Page 3: ...the DExx board always turn off and disconnect the power to both your device and your DE10 Nano before connecting or disconnecting any devices to the SCART port Do not expose to moisture Droplets of mo...

Page 4: ...Dexx vd_isl Quick Start Guide VideoGamePerfection com Overview Page 4...

Page 5: ...uires a hardware modification to the DE10 Nano board Details of how to perform this modification will be posted to the Wiki here https junkerhq net xrgb index php title DExx vd_isl Toslink J2 Connecto...

Page 6: ...Dexx vd_isl Quick Start Guide VideoGamePerfection com Remote control The DExx vd_isl uses the same IR remote as the OSSC The button mappings are very similar and can be seen below Page 6...

Page 7: ...e your MiSTer system SD card and store it away safely Insert the female end of the supplied jumper cable onto the connector labelled J2 as shown in the picture below Note the orientation of the jumper...

Page 8: ...he pin sockets highlighted in yellow we will need those later Carefully place the connector from the DExx on to the connector on the right of the DE10 Nano board as highlighted in red in the picture a...

Page 9: ...that the jumper cable is inserted into the correct place Refer to the previous picture where the correct pin sockets are highlighted in yellow From the front of the board there should be four vacant...

Page 10: ...v img raw true To prepare the SD card we recommend the program Balena Etcher which is available here https www balena io etcher This program is available for Windows Linux and MacOS The instructions t...

Page 11: ...Insert your MicroSD card into your PCs card reader and make a note of the drive letter or assignment Now in the Etcher software click on Select Target The window shown below will appear...

Page 12: ...triple check that you have the right one before clicking on Select 1 Now click on Flash Depending on your OS and how your computer is configured you may need to grant permission for the file to be wri...

Page 13: ...card socket on the DE10 Nano board These steps to prepare the SD card only need to be done once per SD card Future firmware updates can be copied directly to the SD card using your operating system o...

Page 14: ...and the HDMI cable between the DE10 Nano and your display Now power on your display and set to the correct input Next connect the power supply to the DE10 Nano board If you programmed the MicroSD card...

Page 15: ...re We recommend Artemeo s 240p test suite which is available for several retro video games consoles and includes a useful audio test You can download this software here https junkerhq net xrgb index p...

Page 16: ...OSSC Pro The device has three operating modes Pure line multiplier Adaptive line multiplier Scaler Pure and adaptive line multiplication modes offer a lag free scaling solution for retro video console...

Page 17: ...Connecting a console PCB or other hardware Power your DExx off and connect a suitable source to the AV1 SCART connector For most systems using a properly wired RGB SCART cable connected to the AV1 inp...

Page 18: ...lso supports custom scaling algorithms see page 20 for more information Some of these may add scanlines to the image as the image is scaled In this case post processing scanlines should be turned off...

Page 19: ...y trying the different line multiplication modes If your display refuses to show a picture simply use the remote to change to a different mode again If the DExx is set to scaler mode the range of outp...

Page 20: ...s on and cannot be disabled Scaling algorithm You can use this option to change the appearance of the scaled image Generally it is just a matter of choosing which option you personally think looks the...

Page 21: ...support Audio input and output Analogue audio input on the DExx is processed through the AV1 SCART socket and digitised automatically Digital audio input via the SPDIF socket requires a small hardwar...

Page 22: ...utput mode No audio Sample mode incompatible Change the Sampling format under Audio options to 24bit 48kHz No image Sync mode set wrong Press the source button again to change sync mode Most common sy...

Page 23: ...one years warranty Outside of warranty we can service and repair most faulty units Please consider contacting us before disposing of your DExx even if you no longer want it If you do need to dispose o...

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