NPX(4) - Device Drivers Manual (i386) #
NPX(4) - Device Drivers Manual (i386)
NAME #
npx - 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 ALSO #
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 7.5 - June 20, 2007