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I have published initial release of NX Horizon Event Bus for Delphi as Open Source on GitHub. Features: implements the publish/subscribe pattern, decoupling publishers and subscribers events are categorized by type any Delphi type can be used as an event supports four types of event delivery: synchronous, asynchronous, synchronous in the context of the main thread, and asynchronous in the context of the main thread provides generic record and reference-counted class wrappers for easier usage and management of existing types as events simple in both implementation and usage fast full thread safety https://github.com/dalijap/nx-horizon

It depends on the encoding of the 8 bit data. For all we know, that data could be ASCII. The problem is that the question doesn't have any actionable information, and the asked is just hoping for some silver bullet. Asker needs to get some real information rather than hope that people here can guess what's up.

That is the source of your problem because converting an AnsiChar to UnicodeChar ( = Char) is not a simple byte copy, it will convert characters not in the 7 bit ASCII set to Unicode codepoints that may have different ordinal values. This depends on the active ANSI codepage of the system as well. The only sensible solution is to treat bytes as bytes and not as characters, use TBytes or other suitable containers to store sequences of bytes instead of strings (ANSI or Unicode). Writing a Pos equivalent for TBytes is easy and there are likely dozens of implementations around, you just have to find one .

If I ever get it working.. 🙂

Nobody has any idea what the actual problem is, but yeah, let's just randomly through some AnsiStrings around. This approach to coding doesn't work. The monkeys still haven't typed Shakespeare yet..