mcp-1600

1 definition found

mcp-1600 - Free On-line Dictionary of Computing (26 May 2007) :

  MCP-1600
  
     A processor made by Western Digital, consisting of at least
     four separate integrated circuits, including the control
     circuitry unit, the ALU, two or four ROM chips with
     microcode, and timing circuitry.
  
     The ALU chip contained twenty-six 8-bit registers and an
     8-bit ALU, while the control unit supervised the moving of
     data, memory access, and other control functions.  The ROM
     allowed the chip to function as either an 8- or 16-bit chip,
     with clever use of the 8-bit ALU.  Further, microcode
     allowed the addition of floating-point routines (40 + 8 bit
     format), simplifying programming (and possibly producing a
     floating-point coprocessor).
  
     Two standard microcode ROMs were available.  This
     flexibility was one reason it was also used to implement the
     DEC LSI-11 processor as well as the WD Pascal Microengine
     .
  
     (1994-11-18)