Road-plan and other stuff?

[André-John Mas]

Hi,

I am new to the project and had a few questions. I have browsed
around the OpenBIOS web site, to get an idea of what is going on
and where its at. Looking at the 'progress' page I see that the
work currently seems to be focused on the Forth core engine and
the Forth base dictionary. As to the other projects there is no
information, other than being at 0%. Has any one already
suggested a direction for these projects and what they
expect from them? For example, the user interface in all
open firmware solutions I have seen so far (Sun boxes
and Apple Macs, with new world ROM) all have a command
line interface. Would it be conceivable to add a PC BIOS
style GUI, in addition to the CLI for 'high-level' configuration.

In addition, while doing a search on the web I came up with
the following documents that might be useful - I hope none
of them cause issue:

From the Apple site:

http://developer.apple.com/technotes/tn/tn1061.html
http://developer.apple.com/technotes/tn/tn1044.html
http://developer.apple.com/technotes/tn/tn1062.html

http://developer.apple.com/hardware/pci/index.html
   - bottom: "Forth for Open Firmware Basics" tutorial
      presentations. Other stuff may be of interest.

Elsewhere:

http://homepage.mac.com/potswa/source/
http://people.cornell.edu/pages/ak234/BootSafe/main.htm
http://www.hempeldesigngroup.com/lego/pbForth/

http://www.openppc.org/software.html
   - some references to open firmware

http://www.software-x.com/software-x/bios.html

regards

André-John

[Stefan Reinauer]

Hi André-John,
> I am new to the project and had a few questions. I have browsed
> around the OpenBIOS web site, to get an idea of what is going on
> and where its at. Looking at the 'progress' page I see that the
> work currently seems to be focused on the Forth core engine and
> the Forth base dictionary. As to the other projects there is no
> information, other than being at 0%.

I have to apologize, I badly neglected updating the web pages during
the last amount of time. I'll try to push an update asap.

The status is quite a bit further than stated on the web site.

* Toolchain: completed.
   The two utilities toke and detok (FCode tokenizer/detokenizer)
   are working stable. They will be used to create FCode bytecode 
   drivers from forth source.

* Forth Kernel: completed. 
   I plan to add some smaller enhancements to it, to make it easier
   to use it for development on a unix machine (X11 gui, some sample
   hardware emulation that allows testing device interface et al)

* User Interface: pretty much finished
   The user interface contains all forth words needed for a basic ans 
   compliant forth implementation, and a command interpreter/compiler
   (ok-prompt).
   Here some forth constructs are not 100% complete, i.e can most
   forth systems handle loop constructs while being in interpretation 
   mode (not inside of a word definition / compile mode).
   This is not yet possible with OpenBIOS, but I consider it rather low
   priority. Patches are of course welcome.

* Device Interface: started
   Completing the device interface is one of the most important tasks in
   the near future. This means setting up the device tree and
   creating/fixing all words that have to do with path resolution,
   packages/devices and properties. The code in CVS: forth/device/ will
   do this part. Currently some of the relevant code is still sitting in
   CVS: forth/base/ and will be moved as things get complete.

* FCode Evaluator (needs fixing)
   I wrote an fcode evaluator a while ago, it resides in CVS:
   forth/evaluator. I did test it with the old ForthVM paflof, but
   it is not fully adapted to the new forth kernel yet, Thus it builds
   but does not work. This evaluator runs FCode bytecode to build up
   the device tree using functions from the user and device interface.

* Client Interface (almost nothing there yet)
   The client interface is the interface between OpenBIOS and the
   Operating system. This component does not exist - almost. There
   are some words/dummies in CVS: forth/administration, but most
   of them simply do nothing.

* Drivers (none existing yet)
   Drivers can be written in Forth, using toke to create fcode 
   bytecode binaries. There are no drivers yet, since there is no
   working test environment (device interface)
   The most urgent drivers are pci, keyboard, a simple framebuffer
   driver and ide.
> Has any one already suggested a direction for these projects and what
> they expect from them? For example, the user interface in all open
> firmware solutions I have seen so far (Sun boxes and Apple Macs, with
> new world ROM) all have a command line interface. Would it be
> conceivable to add a PC BIOS style GUI, in addition to the CLI for
> 'high-level' configuration.

Yes, adding any kind of gui can be done as an extension to the basic
OpenFirmware system. Motorola's Powerstack machines have a gui that can
be used with mouse and keyboard. If you want to have a phoenix- or
awkward bios lookalike, this should be rather simple to implement.

Stefan