| A screenshot of GeekOS running the
ae editor,
which was written by Anthony C. Howe for the 1991
International Obfuscated C Code Contest.
I obviously ported the unobfuscated version :-).
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| First successful file read.
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| First successful file write.
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| First successful file creation.
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| A preview of the upcoming educational GeekOS release. The
screenshot shows a tiny shell program executing another instance of
itself. Features shown are virtual memory
(including paging to disk and growable stack), floppy and IDE disk
drivers, and a read-only filesystem implementation. See our
paper at
SIGCSE 2004
for more details.
|
| A simple test of the IDE driver reading data from the hard disk.
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| Demonstration of user-mode I/O. The first thread reads lines
of text from the keyboard and echoes them to the screen. The second
just prints out "B" over and over again.
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| Another "A"/"B" demo. In this one, the messages printed by
the threads use the Print_String() system call, which copies
data from user space. The number "4" printed at the beginning is
the return value from a system call.
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| User processes printing "A" and "B" via the system call interface.
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| First successful system call trap from user mode
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| GeekOS crashes on an AMD 486 DX-2/80. Interrupt 10
is the Invalid TSS Exception.
Thanks to Peter Gnodde for providing this
picture (and for being the first person to attempt to run GeekOS on
real hardware). Peter has since reported that as of 10 Oct 2001
GeekOS does run on this machine.
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