VAXBI SCSI?

That probably means an XMI DSSI adapter (KFMSA) and an HSD controller (or controllers) that do the DSSI<->SCSI part. You can have up to 6 cpus in there (that would be a VAX 6000-660): the limitation (other than finding the CPU boards) will be how many slots are free. That will probably depend on which memory boards you have. 384MB suggests 1x256MB + 1x128MB or 3x128MB. My recollection is that this class of machine benefits from memory interleave, so 2N memory boards of the same type is generally better. You can get up to 1GB in the machine, but to have support for that you will need OpenVMS V6.0 or later. Minimum OS support is V5.5 but you should be able to get hobbyist licences and media from montagar.com easily enough. (Or maybe someone here can supply the media as an ISO or whatever). I'd suggest that you lean towards OpenVMS V7.2 or V7.3 to start with - V5.5 is old enough that help may be a little harder to come by (in particular, remembering "gotchas" from that far back can be challenging!). You mentioned a DEBNI (or DEBNA or DEBNT). I forget the differences between all these boards (i.e. which were the worst, which differ only in microcode and which support a tape) but a DEMNA (XMI ethernet) would be the ideal (at the expense of an XMI slot though). Having said that, at 10Mbps, it probably makes little difference. (Except the DEMNA was probably less buggy than the others!) There is much VAX 6000 family information on the net. "VAX 6000" fed into http://vt100.net/manx/ should provide plenty of reading for a while. One last point, you can (should you wish to for fun) probably get older VAX 6000 series boards running in that chassis. The procedure is described in the various upgrade manuals (although you would be going the other way!) Antonio -- --------------- Antonio Carlini arcarlini(a)iee.org