ModernUO Emulator
5570537aa0
Follow-up to #2729. ## Problem At load, `ReadAnchoredTime` shifted **every** anchored value forward by the downtime, including values that were already in the past when the save started. That caused two problems. **An expired deadline came back.** A deadline that passed 5 minutes before a 30-minute outage loaded 25 minutes in the future. For example: - `Sheep.NextWoolTime`: a sheep that was ready to shear stopped being ready. - `PlayerVendor.NextPayTime`: an overdue payment was pushed back. - `BaseCreature.SummonEnd`, the spell fields' `End`, `TransientItem.Expiration`, and the ChampionSpawn times could move the same way. **Records were rewritten for nothing.** The first save after every restart rewrote: - stamps of things that had already happened: VirtueContext's `LastHonorUse`, `LastSacrificeGain`, the four `Last*Loss` stamps, and `Corpse.TimeOfDeath` - every deadline that had expired long ago. ## Change - **`IGenericReader.AnchoredTimeOrigin`** is the loaded save's start time. - `GenericEntityPersistence` and `GenericPersistence` set it from `World.LoadedSaveStartTime`. - `BufferReader`, `UnmanagedDataReader` and `BinaryFileReader` expose it. - **`ReadAnchoredTime` returns any value at or before the origin exactly as saved.** - A deadline still running at save start is shifted as before and keeps its remaining time. - Readers without an origin keep the old behaviour. - **This covers every anchored field, including generated ones.** Generated `[AnchoredDateTime]` fields call `reader.ReadAnchoredTime()`, so the one change covers all 26 generated fields as well as the manual reads. `[DeserializeTimer]` only restores timers that were running at save time, so it is unaffected. - **The `[AnchoredDateTime]` section of `dev-docs/serialization.md` and the `WriteAnchoredTime` doc comment describe the new rule.** ## Behaviour change Downtime now counts toward windows measured from a past stamp: | Window | Length | |---|---| | Honor use | 5 minutes | | Sacrifice gain | 1 day | | Virtue atrophy | 7 days | | Instanced corpse looting | 3 minutes | A 30-minute outage makes a 7-day atrophy fire about 0.3% sooner. No format change. ## Tests New tests in `AnchoredTimeTests`: - A deadline running at save start keeps its remaining time. - A deadline that passed before save start stays passed. - A past stamp is not shifted. - A value exactly at save start is not shifted. `Server.Tests`: 845 passed. `UOContent.Tests`: 1140 passed. |
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| .github | ||
| branding | ||
| dev-docs | ||
| Distribution/Data | ||
| Projects | ||
| tools | ||
| .cursorrules | ||
| .editorconfig | ||
| .gitattributes | ||
| .gitignore | ||
| AGENTS.md | ||
| azure-pipelines.yml | ||
| CLAUDE.md | ||
| CODE_OF_CONDUCT.md | ||
| CONTRIBUTING.md | ||
| Directory.Build.props | ||
| FAQ.md | ||
| GEMINI.md | ||
| global.json | ||
| LICENSE | ||
| ModernUO.slnx | ||
| publish.cmd | ||
| publish.ps1 | ||
| publish.sh | ||
| README.md | ||
| rider-settings.zip | ||
| Rules.ruleset | ||
| SPONSORS.md | ||
| stylecop.json | ||
| THIRD-PARTY-NOTICES | ||
| version.json | ||
ModernUO 
Ultima Online Server Emulator for the modern era!
Requirements
Supported Operating Systems
Required Frameworks
All Operating Systems
Windows
Hardware
| Use | vCPU | RAM | Storage |
|---|---|---|---|
| Development / test | 2 dedicated | 2 GB | SSD |
| Small live shard (< 50 concurrent) | 4 dedicated | 4 GB | NVMe |
| Medium (50–200) | 4–8 | 8 GB | NVMe |
| Large (200+) | 8+, high clock | 16 GB+ | NVMe |
See dev-docs/server-requirements.md for more information.
Development
Supported IDEs
Getting Started
- Install prerequisite requirements
- Clone this repository (or download the latest):
git clone https://github.com/modernuo/ModernUO.git
- Open
ModernUO.slnto start developing
Building/Publishing
Interactive Mode (Recommended for new users)
Run ./publish.cmd (Windows) or ./publish.sh (Linux/macOS) with no arguments to launch the guided build tool. It will:
- Check prerequisites (.NET SDK, native libraries)
- Walk you through configuration and platform selection
- Build and publish the server to the
Distributiondirectory - Show deployment instructions for cross-compiled builds
Command Line
./publish.cmd [release|debug] [os] [arch]
os- Supported operating systemsarchx64- Intel/AMD 64-bitarm64- ARM 64-bit
Linux Prerequisites
Fedora, CentOS, RHEL, AlmaLinux, Rocky, etc
dnf upgrade --refresh -y
# RHEL-family distributions (CentOS Stream, AlmaLinux, Rocky, RHEL) need CRB and EPEL enabled.
# Fedora skips this block.
dnf install -y dnf-plugins-core
dnf config-manager --set-enabled crb
dnf install -y epel-release
# Prerequisites
dnf install -y findutils libicu libdeflate libargon2 tzdata
Ubuntu, Debian, etc
apt-get update -y
# The ICU runtime package carries the ABI version in its name (libicu74, libicu76, …) and has no
# stable alias, so match it by pattern rather than pinning a release-specific name.
apt-get install -y '^libicu[0-9]+$' libdeflate0 libargon2-1 tzdata
Only the runtime libraries are needed — the -dev/-devel packages are not. Run
./build-tool --check-prereqs to check the current machine and print the exact packages your
release needs.
zstd is not listed because ZstdNet bundles libzstd for every platform, and liburing is not
listed because IORingGroup issues io_uring syscalls directly.
If the shard's configured time zone is a legacy alias such as US/Eastern, Debian 12 and Ubuntu
24.04 also need tzdata-legacy. See Platform Prerequisites
for what each dependency is for and what breaks without it.
OSX Requirements
brew install icu4c libdeflate argon2
Running the Server
- Follow the publish instructions
- The
Distributiondirectory is portable — copy it to your production server for deployment - Run
ModernUO.exeordotnet ModernUO.dllfrom theDistributiondirectory - On first run, the server will prompt you to configure game data file locations
Troubleshooting / FAQ
- See FAQ
Want to sponsor?
Thank you for supporting us! You can find out how by visiting the sponsors page.
Collaborators
Thanks
- RunUO Team & Community
- Voxpire, the ServUO Team & Community
- Karasho, Jaedan and the ClassicUO Community
Development Tools & Plugins provided with ♥ by
Code Signing Policy
Free code signing provided by SignPath.io, certificate by SignPath Foundation.
This program will not transfer any information to other networked systems unless specifically requested by the user or the person installing or operating it
Teams & Roles
Approvers & Committers: Development Team