OS-NINE - OS-Nine Is Not an Emulator
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The purpose of these device is to make ideal devices for the v6809 emulator.
The devices read and write to a predefined memory-location which the emulator
reacts to and for the SCF-device reads and writes to stdin/stdout.
For the RBF device it will write to a VDK file.

When everything is ready I create a boot file in S-Record format which
will be given to the v6809 emulator as an argument.

TO DO:

- Make a device driver to replace ACIA. This driver I call PTY. (Pseudo tty)
- Make a device descriptor called TERM describing PTY's parameters.
- Make a device driver for diskio. To be called PDISK. Make a device descriptor
    called D0.
- Don't make a clock module, and don't use the original one.
- OS-9 modules the emulator must be initialised with
    OS9 (at $F800) ,OS9p2, SYSGO, INIT, IOMAN, SCFMAN, RBFMAN,
    PTY, TERM, PDISK, D0, SHELL