Exotic architectures the standards committees care about

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Take a look at this one

Unisys ClearPath Dorado Servers

offering backward compatibility for people who have not yet migrated all their Univac software.

Key points:

  • 36-bit words
  • CHAR_BIT == 9
  • one’s complement
  • 72-bit non-IEEE floating point
  • separate address space for code and data
  • word-addressed
  • no dedicated stack pointer

Don’t know if they offer a C++ compiler though, but they could.

And now a link to a recent edition of their C manual has surfaced:

Unisys C Compiler Programming Reference Manual

Section 4.5 has a table of data types with 9, 18, 36, and 72 bits.

size and range of data types in USC C compiler

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