In message <Pine.LNX.4.10.9912021116370.26748-100000@perelandra.athenet.net>,
Paul Thompson writes:


>Is the DEC 5500 support compatible with the 5400?  Would there be any
>benefit from booting the kernel on my 5400?

I beleive the console I/O, hardware timer support, and Qbus adaptor is
very similar: both are derived from Mayfair-class CVAX systems.
However, they use different onboard peripherals, from memory:

	5400		5500
Disk	DSSI via ssi	SCSI via 53c94
network	lance(?)	SGEC


NetBSD already has drivers, more or less, for all except the DSSI.  (I
havent looked at the SGEC driver; if it uses the vax-pagetable-walking
hardware feature, then that's unlikely to work well on a mips CPU.)

Implementing all of DSSI is a real pain.  In the short term, the best
bet for 5400s is likely to be a Qbus MSCP adaptor (either for
RA-series disk, or a Qbus SCSI controller).

If anyone else has a better idea, dont keep it to yourself :)