diff options
Diffstat (limited to 'share/man')
| -rw-r--r-- | share/man/man4/man4.i386/npx.4 | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/share/man/man4/man4.i386/npx.4 b/share/man/man4/man4.i386/npx.4 index b6dac696fc0..94b6a9bfb35 100644 --- a/share/man/man4/man4.i386/npx.4 +++ b/share/man/man4/man4.i386/npx.4 @@ -1,4 +1,4 @@ -.\" $OpenBSD: npx.4,v 1.9 2002/10/01 07:14:14 miod Exp $ +.\" $OpenBSD: npx.4,v 1.10 2002/10/04 15:34:28 mickey Exp $ .\" .\" Copyright (c) 1993 Christopher G. Demetriou .\" All rights reserved. @@ -35,8 +35,10 @@ .Nm npx .Nd Numeric Processing Extension coprocessor and emulator .Sh SYNOPSIS -.Cd "npx0 at isa? port 0xf0 irq 13" -.Cd "option GPL_MATH_EMULATE" Pq "floating point emulation" +.Cd "options MATH_EMULATE" +.Cd "options GPL_MATH_EMULATE" +.\" XXX this is awful hackery to get it to work right... -- cgd +.Cd "npx0 at isa? port" \&"IO_NPX0\&" irq 13 .Sh DESCRIPTION The .Nm @@ -55,7 +57,9 @@ The driver is required for proper system functioning regardless of whether or not a NPX is present. .Pp -If there is no NPX present in the system, the +If there is no NPX present in the system, either +.Ic option MATH_EMULATE +or .Ic option GPL_MATH_EMULATE must be defined in the kernel configuration file. It will provide support for the instructions normally executed by the NPX. @@ -66,6 +70,7 @@ is not built with math emulation, the system will not boot. .Xr isa 4 .Sh CAVEATS The emulator is much slower than the NPX coprocessor. +(The GPLed version of the emulator is somewhat faster than the non-GPLed one.) This will result in poor floating-point math performance if the emulator must be used. .Sh BUGS |