Play PSP ad-hoc games on PSP Relay with a PS Vita

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PSP · PSP Relay · PS Vita

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A PS Vita can join PSP Relay while playing PSP games through Adrenaline or ARK, using the [aemu plugin](https://github.com/Kethen/aemu/blob/main/installation.md). That lets it play ad-hoc games with real PSPs and PPSSPP over the internet.

## What you need

- 6.61 Adrenaline, or ARK standalone custom firmware, as documented by aemu.
- A working Wi-Fi connection. On the Vita go to **Settings > Network > Wi-Fi Settings**, connect, then run **Settings > Network > Internet Connection Test**.
- The latest aemu release from [GitHub](https://github.com/Kethen/aemu/releases).

## Prepare the Vita

1. In Vita **Settings > Power Save Settings**, disable **Use Wi-Fi in Power Save Mode**.
2. If you use Adrenaline, also set **WLAN Power Save** to Off in the XMB under **Settings > Power Save Settings**.
3. Apply the aemu CFW settings:

**Adrenaline** (Select on the XMB to open the recovery menu): CPU Speed in UMD/ISO = `333/166`; Advanced > Force High Memory Layout = Disabled.

**ARK Standalone** (Triangle in the custom launcher > CFW Settings): CPU Clock in Game = OverClock; Use Extra Memory = Auto; Memory Stick Speedup = Off; Inferno Cache = Off.

## Install aemu

1. Copy the `kd` and `seplugins` folders from `dist_660_release` to the root of the PSP memory stick. If you did not change Adrenaline's path, that is `ux0:/pspemu`.
2. If it is not already there, add this line to `ux0:/pspemu/seplugins/game.txt` on Adrenaline:

`ms0:/seplugins/atpro.prx 1`

On ARK Standalone, add this line to `ux0:/pspemu/seplugins/plugins.txt`:

`game, ms0:/seplugins/atpro.prx, on`
3. Remove `ux0:/pspemu/kd/pspnet_miniupnc.prx` if that file exists.

## Choose a relay server and port offset

By default aemu uses `socom.cc`. To use another server, edit `ux0:/pspemu/seplugins/server.txt`. aemu documents `socom.cc`, `psp.mgn.pub`, `eahub.eu`, and `psi-hate.com`. A longer list is on the [PPSSPP ad-hoc server list](https://www.ppsspp.org/docs/multiplayer/adhoc-servers/). Everyone you want to play with must use the same server.

If you play with PPSSPP, all players must use the same port offset. PPSSPP documentation recommends `10000`. Set that value in `ux0:/pspemu/seplugins/port_offset.txt`.

Optional: you can override the nickname with `ux0:/pspemu/seplugins/nickname.txt`, which aemu notes is useful on ARK Standalone if a game does not like the nickname generated from the Vita PSN name.

## Play

1. Start an ad-hoc multiplayer session in the PSP game as usual.
2. If the game lags or drops often, pick a closer relay and a less busy 2.4 GHz channel, as described in the [aemu troubleshooting notes](https://github.com/Kethen/aemu/blob/main/installation.md).

Sources: [aemu installation](https://github.com/Kethen/aemu/blob/main/installation.md), [PPSSPP ad-hoc server list](https://www.ppsspp.org/docs/multiplayer/adhoc-servers/).

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