[SunRescue] Redhat 6.2 on IPX

[powerpcpro]

I am trying to install linux on my IPX. It has 32MB of RAM, 480MB HD, cg6,
and ROM rev 2.3. Because I do not have a functioning keyboard(I bought one
off of ebay(type 5), but it must be a dud because I get a no keyboard
present error on boot up and it switches to ttya) and I am using a Link dumb
terminal and when it gets to the RedHat installer, I get a bunch of
scrambled characters. Is there a boot arg or setting I can change to get it
to display properly?
regards,
jim