But of course, like any immutable system, there are mutable parts (otherwise, we couldn’t create any configuration files). OSTree handles this with “overlays” (actually, we use OverlayFS) that allow a read-write filesystem to be layered on top of the immutable system. For example, the /etc and /var directories are writable, while the rest of the system is read-only.
变化四：新兴先进封测技术的兴起CoWoS先进封装可谓HBM的黄金搭档。随着全球对于高性能计算（HPC）及人工智能（AI）芯片需求的持续增长，也推动了对于台积电CoWoS（Chip on Wafer on Substrate）先进封装产能的需求暴涨，虽然台积电持续扩大产能，但依然难以满足市场需求，成为了限制HPC及AI芯片产能的另一关键瓶颈。这也使得部分客户考虑寻求台积电CoWoS以外的替代方案，其中就包括英特尔的EMIB-T先进封装技术。
。爱思助手下载最新版本是该领域的重要参考
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Version: 42.20250921.0 (2025-09-21T19:04:38Z)
2. Then, I started a Claude Code session, and asked it to fetch all the useful documentation on the internet about the Z80 (later I did this for the Spectrum as well), and to extract only the useful factual information into markdown files. I also provided the binary files for the most ambitious test vectors for the Z80, the ZX Spectrum ROM, and a few other binaries that could be used to test if the emulator actually executed the code correctly. Once all this information was collected (it is part of the repository, so you can inspect what was produced) I completely removed the Claude Code session in order to make sure that no contamination with source code seen during the search was possible.