This page is a collection of tasks needed for the Babylon project and are in no particular order. They are grouped by subsystem and are generally arranged in order of increasing difficulty level. If you are interested in working on one of these items please email babylon@csua.berkeley.edu so we do not duplicate any work.

VMIPS

• Add block device
• Write a replacement for the spim console that uses only one irq and allows more terminals.
• Support multiple simulated CPUs. Please talk to us before working on this as there are subtle design issues.
• Ethernet device with support for simulated CPUs on different machines communicating.
• Use GNU Lightning and the ideas from Embra to dynamically translate MIPS code to native code.
• Repackage VMIPS with binutils, gcc, and gdb so users simply compile and install one package for Babylon development.

Miscellaneous

• Discover the necessary magic to make emacs always use eight space tabs for source files in */babylon/source/* and add this to the set of default configuration files in configuration/.
• Function to print useful debugging information about malloc memory usage using the malloc_type records.
• Add mechanism to automatically generate the system call table. Look at the FreeBSD and NetBSD sys/syscall.master for inspiration, but Babylon doesn't need all these features.
• Look at FreeBSD's ash or another simple shell and determine the minimum number of system calls needed to port it to the Babylon kernel. Update: brg has done this, the list of system calls will be uploaded shortly.

File system

Almost all aspects of the file system are not implemented yet.

• Add VFS layer
• Add file name lookup

Virtual memory

Almost all aspects of the virtual memory system are not implemented yet.

• Segment tables
• Fork / exec
• Copy on write

Web Page

• Use CSS to display eight space tabs for <code> segments.
• Add mailing list archives and automated archiving.