Hi,
For purely academic purposes I am building an IP router based on an mpc8240
in my "capstone" EE class at NMSU. I was wondering if someone who may have
done something similar could tell me if I'm working in the right direction.
I've done some research with the list archives and I think I have decided on
a basic hardware layout. I'm just wondering if my ideas are sane and I have
a couple of questions.
I will be wire-wrapping the entire design (sockets have been acquired) and
and plan to use:
MPC8240 (At ~30MHz bus)
National 16550 UART connected to RCS1, etc...
2 16-bit flash ROMs (8MByte total) (Am29LV320D x2) connected toRCS0, etc...
128MB SDRAM in 1 DIMM
PCI (wire wrap board attached to a backplane) with 2 FA310TX netgear cards
There is also a reset circuit, a power supply, and I'm guessing I need a
buffer between the UART and the CPU and a MAX232 for serial line driving.
I also planned to start out by programming the ROMs through the BDM/JTAG port
on the CPU. I'll start with the GDB target for MPCs and attempt to load a
program into RAM to program the 2 flashes, with--ppcboot. Hopefully this
will allow me to run the 2.4_devel version of the ppc kernel, busybox/uclibc
as a distro and iptables as the "router".
I'm expecting many frustrations (I mean learning experiences) along the way
and I suppose I'll begin with sandpoint code for ppcboot and the kernel.
So, what do you think. Will it work? Also, is there maybe a different
kernel I should start out with. Anybody see any major pitfalls?
Also, in the chance that this works I would love to PCB it and fire it up at
200 MHz/100MHz Memory/66MHz PCI and then hang it on my wall because I have to
give the 8240 back to my professor. I can design the PCB but what is the
cheapest way to get a 4-6 layer board done.
Thanks for any and all advice!
--Dustin
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