NES:NESRGB: Difference between revisions
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The NESRGB is a mod designed by Tim Worthington to improve the video quality of the NES and Famicom. Released in 2013, it was the first RGB output solution for the NES/Famicom that did not require [[NES:PlayChoice-10 PPU Mod|scavenging the RGB PPU from a PlayChoice-10 or Vs. board]]. | |||
The NESRGB is a mod designed by Tim Worthington to improve the video quality of the NES and Famicom. | |||
The following information and images have been gathered from [https://etim.net.au/nesrgb/ Tim's website], with their permission. | The following information and images have been gathered from [https://etim.net.au/nesrgb/ Tim's website], with their permission. | ||
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[[File:Nesrgb board.jpg|thumb]] | [[File:Nesrgb board.jpg|thumb]] | ||
Most unmodified NES and Famicom consoles only support composite and RF (radio frequency) video output, with | Most unmodified NES and Famicom consoles only support composite and RF (radio frequency) video output, with the original Famicom and top loader NES only having RF output. The NESRGB is an internal mod that adds RGB and S-video outputs to the NES and Famicom. | ||
The mod features a user-selectable palette system that allows the user to change the color scheme of the video output to suit their preference. For more information about NES palettes, see [http://www.firebrandx.com/nespalette.html FirebrandX's NES Palette Project page]. | The mod features a user-selectable palette system that allows the user to change the color scheme of the video output to suit their preference. For more information about NES palettes, see [http://www.firebrandx.com/nespalette.html FirebrandX's NES Palette Project page]. | ||
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* User selectable color palettes | * User selectable color palettes | ||
* Upgradable firmware via JTAG programmer | * Upgradable firmware via JTAG programmer | ||
* Can be switched off to allow the use of the original composite video output from the PPU | |||
===Technical Details=== | ===Technical Details=== | ||
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The timing of the NES/Famicom's video signal is slightly unusual and runs slightly under the standard 60 Hz in an attempt to reduce video artifacting. However, this signal is not compatible with all modern displays and [https://www.youtube.com/watch?v=EEt7XFfreQM may cause some flickering at the top of the screen]. Original versions of the NESRGB did not address this and so required a "de-jitter" mod when used on sensitive displays. Beginning with hardware version 2, the NESRGB incorporates a de-jitter function in its firmware. Instructions on how to add a de-jitter mod to older NESRGB revisions can be found [https://etim.net.au/nesrgb/background_fault/de-jitter.html here on Tim Worthington's website.] | The timing of the NES/Famicom's video signal is slightly unusual and runs slightly under the standard 60 Hz in an attempt to reduce video artifacting. However, this signal is not compatible with all modern displays and [https://www.youtube.com/watch?v=EEt7XFfreQM may cause some flickering at the top of the screen]. Original versions of the NESRGB did not address this and so required a "de-jitter" mod when used on sensitive displays. Beginning with hardware version 2, the NESRGB incorporates a de-jitter function in its firmware. Instructions on how to add a de-jitter mod to older NESRGB revisions can be found [https://etim.net.au/nesrgb/background_fault/de-jitter.html here on Tim Worthington's website.] | ||
===Note About Hardware Version | ===Note About Hardware Version 4=== | ||
The latest version of the NESRGB. A different FPGA is now used due to parts shortages. There's a [https://etim.net.au/nesrgb/NESRGB40.html dedicated page] that covers what's new in this version and more importantly, what's different in how you install it. | |||
=== NESRGB Errata === | |||
As with every electronic devices, issues are discovered and solutions for these issues are made available. NESRGB is no different. Tim publishes NESRGB errata on his site: | |||
* [https://etim.net.au/nesrgb/background_fault/ errata for older RGB kits] | |||
* [https://etim.net.au/nesrgb/background_fault/nesrgb40/ errata for NESRGB V4 kits] | |||
==Materials Required== | ==Materials Required== | ||
* Phillips head screwdriver | * Phillips head screwdriver | ||
* 4.5 mm gamebit screwdriver (required for NES top loader and AV Famicom) | * 4.5 mm gamebit screwdriver (required for NES top loader and AV Famicom) | ||
* Soldering iron | * Soldering iron, solder, flux, wire, and wire stripper | ||
* Desoldering gun (not totally required, but ''highly'' recommended as it makes removing the PPU much easier) | * Desoldering gun (not totally required, but ''highly'' recommended as it makes removing the PPU much easier) | ||
* Drill with step bits (required if adding additional connectors) | * Drill with step bits (required if adding additional connectors) | ||
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===AV Famicom=== | ===AV Famicom=== | ||
See the [https://etim.net.au/nesrgb/installation-famicomav official written documentation]. | See the [https://etim.net.au/nesrgb/installation-famicomav official written documentation]. | ||
There is also an AV Famicom quick-solder board (QSB) and an additional process to remove jailbars as noted on the [https://www.laserbear.net/blogs/news/removing-jailbars-from-av-famicom-nesrgb LaserBear website]. | |||
===Top Loading NES=== | ===Top Loading NES=== | ||
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==Troubleshooting/Notes== | ==Troubleshooting/Notes== | ||
See the [https://etim.net.au/nesrgb/background_fault/ official errata and firmware download page]. | See the [https://etim.net.au/nesrgb/background_fault/ official errata and firmware download page]. | ||
[[Category:NES]] | |||
[[Category:Video Mods]] | |||
Latest revision as of 16:53, 9 October 2024
The NESRGB is a mod designed by Tim Worthington to improve the video quality of the NES and Famicom. Released in 2013, it was the first RGB output solution for the NES/Famicom that did not require scavenging the RGB PPU from a PlayChoice-10 or Vs. board.
The following information and images have been gathered from Tim's website, with their permission.
Description
Most unmodified NES and Famicom consoles only support composite and RF (radio frequency) video output, with the original Famicom and top loader NES only having RF output. The NESRGB is an internal mod that adds RGB and S-video outputs to the NES and Famicom.
The mod features a user-selectable palette system that allows the user to change the color scheme of the video output to suit their preference. For more information about NES palettes, see FirebrandX's NES Palette Project page.
Features
- Generates RGB, S-video (encoded from RGB), and composite video (encoded from RGB) signals
- No latency (video timing is maintained)
- Built in audio and video amplifiers
- Compatible with NTSC and PAL consoles
- Compatible with NES, Famicom, AV Famicom, and Twin Famicom consoles
- User selectable color palettes
- Upgradable firmware via JTAG programmer
- Can be switched off to allow the use of the original composite video output from the PPU
Technical Details
The NESRGB board contains an Altera CPLD (Complex Programmable Logic Device) that utilizes the NES's PPU (Picture Processing Unit) and CPU to generate an RGB video signal.
Note About Jitter
The timing of the NES/Famicom's video signal is slightly unusual and runs slightly under the standard 60 Hz in an attempt to reduce video artifacting. However, this signal is not compatible with all modern displays and may cause some flickering at the top of the screen. Original versions of the NESRGB did not address this and so required a "de-jitter" mod when used on sensitive displays. Beginning with hardware version 2, the NESRGB incorporates a de-jitter function in its firmware. Instructions on how to add a de-jitter mod to older NESRGB revisions can be found here on Tim Worthington's website.
Note About Hardware Version 4
The latest version of the NESRGB. A different FPGA is now used due to parts shortages. There's a dedicated page that covers what's new in this version and more importantly, what's different in how you install it.
NESRGB Errata
As with every electronic devices, issues are discovered and solutions for these issues are made available. NESRGB is no different. Tim publishes NESRGB errata on his site:
Materials Required
- Phillips head screwdriver
- 4.5 mm gamebit screwdriver (required for NES top loader and AV Famicom)
- Soldering iron, solder, flux, wire, and wire stripper
- Desoldering gun (not totally required, but highly recommended as it makes removing the PPU much easier)
- Drill with step bits (required if adding additional connectors)
Installation
Front Loading NES
See the official written documentation.
Original Famicom
See the official written documentation.
AV Famicom
See the official written documentation.
There is also an AV Famicom quick-solder board (QSB) and an additional process to remove jailbars as noted on the LaserBear website.
Top Loading NES
See the official written documentation.
Twin Famicom
See the official written documentation.