NPX(4) OpenBSD Programmer's Manual (i386) NPX(4)NAMEnpx - Numeric Processing Extension coprocessor and emulator
SYNOPSIS
npx0 at isa? port "IO_NPX0" irq 13
DESCRIPTION
The npx driver enables the use of the system's Numeric Processing
Extension coprocessor, if one is present. Numeric processing extensions
are present in systems with 486DX CPUs and in systems with 387 or 487SX
coprocessors. The npx driver is required for proper system functioning
regardless of whether or not an NPX is present.
SEE ALSOintro(4), isa(4)BUGS
There are lots of them, especially on cheap motherboards. In particular,
some motherboards do not have the interrupt lines from the NPX to the CPU
wired properly.
OpenBSD 4.9 June 20, 2007 OpenBSD 4.9