diff options
Diffstat (limited to 'share/man/man4/si.4')
| -rw-r--r-- | share/man/man4/si.4 | 24 |
1 files changed, 15 insertions, 9 deletions
diff --git a/share/man/man4/si.4 b/share/man/man4/si.4 index d2260bb..8b6c357 100644 --- a/share/man/man4/si.4 +++ b/share/man/man4/si.4 @@ -21,8 +21,9 @@ The system uses two components: A "Host adapter", which is plugged into an ISA, EISA or PCI slot and provides intelligence and buffering/processing capabilities, as well as an external bus in the form of a 37 pin cable. .Pp -On this cable, "modules" are connected. The "SI" module comes in a 4 and 8 -port version. The "XIO" and "SX" modules come only in +On this cable, "modules" are connected. +The "SI" module comes in a 4 and 8 port version. +The "XIO" and "SX" modules come only in 8 port versions. .Pp The host adapter polls and transfers data between the modules and the rest @@ -40,9 +41,10 @@ SI or XIO modules are supported on any host card. .Pp The host adapter uses a shared memory block in the traditional ISA bus -"hole" between 0xA0000 and 0xEFFFF. The adapter can be configured outside -range, but requires the memory range to be explicitly non-cached. The -driver does not yet support this mode of operation. +"hole" between 0xA0000 and 0xEFFFF. +The adapter can be configured outside +range, but requires the memory range to be explicitly non-cached. +The driver does not yet support this mode of operation. .Pp SX ISA Host cards have an 8/16 bit mode switch or jumper on them. This switch @@ -71,8 +73,10 @@ poll intervals as if they were interrupts. An open on a /dev device node controlled by the si driver obeys the same semantics as the .Xr sio 4 -driver. It fully supports the usual semantics of the cua ports, and the -"initial termios" and "locked termios" settings. In summary, an open on a +driver. +It fully supports the usual semantics of the cua ports, and the +"initial termios" and "locked termios" settings. +In summary, an open on a tty port will block until DCD is raised, unless O_NONBLOCK is specified. CLOCAL is honored. An open on a cua port will always succeed, but DCD transitions will be honored after DCD rises for the first time. @@ -105,7 +109,8 @@ settings from being changed. .Pp To manipulate the initial/locked settings, the .Xr stty 1 -command is useful. When setting the "locked" variables, enabling the mode +command is useful. +When setting the "locked" variables, enabling the mode on the lock device will lock the termios mode, while disabling the mode will unlock it. .Sh FILES @@ -158,7 +163,8 @@ The interrupt tuning rate is not believed to be optimal at this time for maximum efficiency. .Pp Polled mode (a feature of standard Specialix drivers) is not implemented, -but it can be approximated by turning on machdep.si_realpoll. The poll +but it can be approximated by turning on machdep.si_realpoll. +The poll frequency is set by machdep.si_pollrate (in units of 1/100th of a second). .Pp The driver does not yet support baud rates higher than 115,200 on SX |
