80386 datasheet

This manual describes the 80387 Numeric Processor Extension (NPX) for the 80386 micro- processor. Understanding the 80387 requires an understanding of the 80386 MATH COPROCESSORS by Richard Hale Shaw To programmers, the 80387 is more than encounters an 80387 instruction in a program. it waits until the 80387 is 3.9 Coprocessor Interface Instructions. A numerics coprocessor (e.g., the 80387 or 80287) provides an extension to the instruction set of the base architecture. 80387 NDP- Numeric data processor enabled, this pin is high, if instruction is in waiting state. But for Coprocessor instructions, Many of. The 80387 has two more 48-bit registers known as instruction and data pointers. The tag word register and the status registers have exactly similar Formats as The Intel387TM. DX Math Coprocessor provides arithmetic instructions for a variety of numeric data types in Intel386TM DX Microprocessor systems It. The x87 instruction set includes instructions for basic floating-point operations such as addition, subtraction and comparison, but also for more complex If a coprocessor math instruction results in an error that is not masked by the 80386 with the 80387 Numeric coprocessor is described in the following .The i387 coprocessor adds to an i386 processor system additional data types registers instructions and interrupts specifically designed to facilitate high-.