GENERAL DESCRIPTION
The Am9512 is a high performance floating-point processor unit
(FPU). It provides single precision (32-bit) and double precision
(64-bit) add, subtract, multiply and divide operations. It can be
easily interfaced to enhance the computational capabilities of
the host microprocessor.
The operand, result, status and command information transfers
take place over an 8-bit bidirectional data bus. Operands are
pushed onto an internal stack by the host processor and a command is issued to perform an operation on the data stack. The
results of this operation are available to the host processor by
popping the stack.
Information transfers between the Am9512 and the host processor can be handled by using programmed I/O or direct memory
access techniques. After completing an operation, the Am9512
activates an "end of execution" signal that can be used to interrupt the host processor.