68030 kernel port of Plan 9
Existing 68020 and 68040 ports formed the basis for a
port to the 68030-based Eltec Eurocom-6 in a VME crate.
This port was used for student project work at the University of York:
developing neural network software to control a robot.
The robot's camera was
attached to a VME frame grabber card in the Eltec crate;
connections from a parallel port controlled the robot's motors;
input from a joystick allowed manual control.
The devices could be controlled by programs running in the crate
(as a CPU server), or imported by another machine running Plan 9 (a
transparent remote control.
Some of the work might be useful to people considering a port
to other 68030 platforms, such as the Amiga or the older 68030-based
NeXt cube not supported by the Plan 9 distribution.
- Modifications are needed to the Plan 9 distribution's 680x0 compiler suite
to support the 68030 MMU instructions.
These are available now, as separate boddle files:
- The 68040 MMU code for the NeXt needs significant changes to support
the 68030's related but different MMU.
The Plan 9 kernel for the Eltec, including MMU support and drivers, is also available, as a boddle
You will need the modified 2a, etc. installed before
you can make the Eltec kernel.
- Fetch the boddle, and
create /sys/src/9/eltec by doing the following:
(where the last argument to the rc command refers to your CDROM source for the NeXt kernel).
- cd /sys/src/9
- rc 9eltec.rc -X /n/cd/sys/src/9/next
- mv 889686630 eltec
- Several drivers included in that boddle are available separately if you haven't got Plan 9 source code:
Zilog 8536 CIO and VIP-1024 VME frame grabber drivers.
I am happy to make the source code of the replacement Eltec
boot ROM available to anyone with a Plan 9 licence who needs it.
(It uses stripped-down versions of some Plan 9 drivers.)
See my mail address below.
C H Forsyth, 12 March 1998