The VAXstation 4000 Model 90

The VAXstation 4000 Model 90 is the latest member of the VAXstation product line. Based on the NVAX CPU, the Model 90 was designed as a module upgrade to the VAXstation 4000 Model 60 system. The Model 90 has 2.7 times the CPU performance of the Model 60 and provides base-level, two-dimensional graphics performance of 266,000 vectors per second. It supports up to 128MB of memory, an SCSI-1 bus interface, a TURBOchannel option, a synchronous communication option, and several graphics options. The design team used only programmable devices to implement the new logic designed into the system. In addition, a breadboard provided the basis for logic and software verification.