Magazine - 1000 BiT

Design of the VRX 4000 iModel400,500, and 600 Sj~stemssame ~ ~440 systeni enclosure usecl for these sys- buses, a thiclc-wire and TliinWire Ethernet adapter,tems. The upgrade requires that the older ~ ~ 6 7 0 a Q-bus adapter, and the console serial line. Tliememory module ilsetl in the Model 300 be replacetl CPU module performance is 16, 24, ant1 32 times tliewith the new, higher-performance ~ ~ 6memory7 0 performance of the well-known \%X-11/780 systern,module. The new systems had to support all of the for the three new VN( 4000 systems, respectively.Q-bus option 111ocl~Ies that were supportetl on the The CPIJ cycle clock speed and cache sizes deter-\$a 4000 Model 300.mine the procluct performance, as cliscussed in thesection CPU-cache Subsystem.The backplane in the systern enclosure providesSystem Overview of the VAX 4000the signal interconnection and power distributionModels 400,500, and 600between systern components. There are connec-The ~ ~440 s)fstem enclosure shown in Figure 1 sup-portstthe VhY 4000 Motlels 300, 400, 500, ancl 600.This petlestal enclosure was designed to operate inan open office environment. lo allow the systemsto operate cluietly, the cooling kins are speecl controllecl,b;~setl on the ambient temperature. Theenclosure power supply provicles 644 watts ofdirect current from a standard 15-ampere wall circuit.The system was designed and qtlalifiecl tooperate in an cn\~ironment with a temperaturerange of from 10 to 40 degrees Celsius.INTEGRATED STORAGEELEMENTSSEVEN Q-BUSU/ OPTION SLOTSKEY:CARDCAGEFigu7.e ITAPE DRIVESYSTEMI ! ! POWERSUPPLYCONSOLEMODULEFIVE DEDICATEDSLOTS BEHINDCONSOLE MODULE(CPU PLUS FOURMEMORY)BA440 Splenz BizclosureThe new