A multi-tasking operating system for the x86 32-bit PC architecture

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XOS Bug list

This page provides a list of the known bugs in XOS version 4.5.0. In general this only includes outright bugs. It does not include features that are simply not implmented or not complete. With the major changes between version 3 and 4, there are quite a few such incomplete features due to modules that simply have not been fully updated from version 3.

As it stands, this list is woefully incomplete. It will be updated as bugs are reported and as they are fixed. Please report any other bugs observed or any additional information about reproducing any of the bugs listed here to

Bootstrap problems:

If the file specified to the bootstrap is not found the bootstrap must be restarted (with ctl-alt-DEL) before it will be able to load a different file.

USB related problems:

Failures (IO errors and system crashes) have occasionally been observed associated with the OHCI USB controller. Any information on reproducing this would be appreciated.

The system may crash if a USB disk is accessed while it is being mounted.

Keyboard and command shell related problems:

Type-ahead of non-ASCII keys of more than one key press is lost.

Editing (inserting and/or deleting) characters before the end of a line occasionally inserts extra spaces at the end of the line. Any information on reproducing this would be appreciated.

The command shell (XSHELL) can get into a state where all input appears to be ignored. Entering a local command (such as CLS) usually restores normal operation. Any information on reproducing this would be appreciated.

XWS (GUI) problems:

Keyboard input to edit windows has numerous problems. This is currently being worked on.

Scroll bars on windows do not work. This is also being worked on.



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