User`s guide

KA52/53/54 CPU Module Description
1.1 KA52/53/54 CPU Module
1.1.1 Physical Description
The KA52/53/54 CPU module is the primary component of the VAX 4000
system in which it is installed. The KA52/53/54 CPU module contains the
following components:
• The NVAX processor chip—This chip is a complementary metal oxide
semiconductor (CMOS) virtual memory microprocessor. The key features of
the chip are as follows:
Support for the MicroVAX chip subset of the VAX instruction set
Support for the MicroVAX chip subset of the VAX data types
Full VAX memory management
30-bit physical memory addressing
Figure 1–1 KA52/53/54 CPU Module
MLO-009931
• DC244 NVAX memory controller (NMC) memory controller chip
• DC243 NVAX CP bus adapter (NMA) and input/output (I/O) control chip
• SCSI controller and SQWF buffer chip
• Time-of-year (TOY) clock SSC chip
1–2 KA52/53/54 CPU Module Description