PPC8245 in standalone mode (without Sandpoint)

QNX Newsgroups (Archives) qdn.public.qnxrtp.powerpc
1

Hi,

Does anybody have experience of running QNX on standalone Unity board (without SandPoint
motherboard).

As far as I understood changes should include:

  1. Adjusted IPL
  2. Startup code (remove south bridge init, add MPC107 init code)
  3. PCI driver (use MPC107 instead of WinBond device)
  4. Serial driver (use built-in UART instead of NatSemi 93k)

Am I missing something?

–
Regards,
Alex

2

Alex Ivchenko <alexx@ueidaq.com> wrote:

Hi,

Does anybody have experience of running QNX on standalone Unity board (without SandPoint
motherboard).

As far as I understood changes should include:

  1. Adjusted IPL
  2. Startup code (remove south bridge init, add MPC107 init code)

In startup, you’ll need to remove the interrupt callouts that deal with
the WinBond’s interrupt controller (8259). You also need to configure
the debug device appropriately.



  1. PCI driver (use MPC107 instead of WinBond device)

We actually only configure a few things on the Winbond. We mainly deal
with the 107.

  1. Serial driver (use built-in UART instead of NatSemi 93k)

This may require some changes to the EPIC interrupt controller. Im not sure
all vectors are handled (specifically the on-board devices). This is handled
by Startup’s interrupt callouts.

Otherwise, the built-in uarts are 8250 compatible.



\

John