VXT X terminal question

FWIW my recollection is that the UV3100-88, UV3100-98 and VAX 4000-108A are the same hardware as the UV3100-85, UV3100-96 and VAX 4000-106A but respun to fit in a PC-style case (and, for at least some options, using PCI connectors but *NOT* a PCI bus). Virtual Instruction Cache. The NVAX cache hierarchy goes something like: 2KB VIC, an 8KB P-cache (on-chip: can do Instructions, Data or both according to config) and up to 2MB of write-back B-cache (this one is external to the NVAX chip itself). It's possible to enable and disable the various caches. The VIC can be disabled by "patching" the NVAX in some dynamic way (presumably non-reversibly or at least only reversible in an obscure way). I don't think the same can be done for the P-cache an the B-cache is physically fitted to the board so, short of grabbing a soldering iron, you are stuck with what the system came with. Antonio -- --------------- Antonio Carlini arcarlini(a)iee.org