cctalk Digest, Vol 122, Issue 20 - Re: Barrys collection - the free stuff

It does. The KA620 is a relatively rare spin on the VAX architecture. It's the board used for the non-boot CPU in the only case I ever played with multiprocessor VAXen. Yes. P0 and P1 page tables are in physical space instead of kernel virtual space. (That is, P0BR andf P1BR contain physical addresses, and P0/P1 PTE access goes to physical memory, rather than kernel virtual.) Relatively minor, but enough to ensure VMS wouldn't run on it, which as I understand it was what DEC cared about at the time. I can't imagine it'd be all _that_ hard to tweak the VAX pmap as needed for the KA620. Of course, that's coming from someone who's never tried it, so it's pure speculation and probably worth what you paid for it. /~\ The ASCII Mouse \ / Ribbon Campaign X Against HTML mouse at rodents-montreal.org / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B