Workbench but not as we know it

Fixed the disk booting problems, workbench now loads, Display is still barfed. Now i need to fix that, and get mouse support in so I can test drive it properly.

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It Booted

Added disk support, unfortunately its a bit broken - as is the display. Display is probably hires which i do not support, error message is saying not a dos disk. Well it is a start at least.