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USB4VC/technical_bulletins.md
2023-03-07 16:54:31 +00:00

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# USB4VC Protocol Card Stability Upgrade
[Get USB4VC](https://www.tindie.com/products/dekuNukem/usb4vc-usb-inputs-on-retro-computers/) | [Official Discord](https://discord.gg/HAuuh3pAmB) | [Getting Started](getting_started.md) | [Table of Contents](#table-of-contents)
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This document covers a solution that might improve the stability of USB4VC.
## Overview
A `BUSY` signal is added, to prevent Raspberry Pi from sending data when Protocol Card is talking to the computer.
This, along with a firmware update, should improve stability and reduce stuck keys or glitches.
## Instructions
### Solder a New Wire
Solder a wire between the pins at **`F1` and `second row of right most column`**. See photo:
![Alt text](photos/adb_busy.jpeg)
![Alt text](photos/adb_busy_close.jpeg)
Make sure **there are no short circuits**.
### Software Update
Connect RPi to internet. You can [set up WiFi](https://github.com/dekuNukem/USB4VC/blob/master/getting_started.md#optional-set-up-wifi), or plug in an Ethernet cable.
Then simply select Internet Update in main menu. It will update RPi code and P-Card firmware to latest version.
![Alt text](photos/internetupdate.jpeg)
Confirm on the second screen that both PB and RPi version are **above 0.3.0**.
![Alt text](photos/newver.jpg)
### Try it Out!
Let me know how it goes!
## Questions or Comments?
Feel free to ask in official [Discord Chatroom](https://discord.gg/HAuuh3pAmB), raise a [Github issue](https://github.com/dekuNukem/USB4VC/issues), [DM on Twitter](https://twitter.com/dekuNukem_), or email `dekunukem` `gmail.com`!
## Table of Contents
[Main page](README.md)
[(Youtube Video) USB4VC in Action](https://www.youtube.com/watch?v=54sdPELuu4g)
[Getting Started Guide](getting_started.md)
[Kit Assembly Guide](kit_assembly.md)
[Tinkering Guide / Make Your Own Protocol Card / Technical Notes](technical_notes.md)
[Kickstarter Acknowledgements](kickstarter_info.md)