mark@umcp-cs.UUCP (Mark Weiser) (02/19/86)
I have recently been introduced to the conceptual beauty of bus couplers. These are little animals which hang between two separate buses and pass relevant addresses back and forth (optionally remapping those addresses). Kind of like network gateways (to use an analogy I'm more familiar with). I understand more or less how to build one of these for a pair of vmebuses (or vmxbuses) but wonder if there are commercially available versions, or chips to help? Thanks. -mark ------ Spoken: Mark Weiser ARPA: mark@maryland Phone: +1-301-454-7817 CSNet: mark@umcp-cs UUCP: {seismo,allegra}!umcp-cs!mark USPS: Computer Science Dept., University of Maryland, College Park, MD 20742 -- Spoken: Mark Weiser ARPA: mark@maryland Phone: +1-301-454-7817 CSNet: mark@umcp-cs UUCP: {seismo,allegra}!umcp-cs!mark USPS: Computer Science Dept., University of Maryland, College Park, MD 20742
stern@tilt.FUN (02/21/86)
You can get VME Bus Extenders (or couplers, whatever you call them) from two places that I know of: HVE Hal-Versa Engineering 1684 Dell Avenue Campbell CA 95008 408 370-4666 VME Microsystems International Corp 12021 N South Memorial Parkway Huntsville, AL 35803 205 880-0444 We have ordered two extenders from VME Microsystems. They cost about $1,200 each; this price includes a master card, a slave card, and three 96-pin 5 foot cables. The slave card goes into the bus where your main master is (ie, CPU) and the master card goes into a satellite slave bus. The only real restriction is that the satellite bus can only have slave devices on it. The VME Repeat Link from VMIC is a full A32:D32 device, unlike the extender from HVE Engineering, which drops a few bits (8, if I remember correctly). --Hal Stern Princeton University {ihnp4, seismo, allegra}!princeton!stern