NAME

iuart − hardware specific console driver for the MVME141 and MVME181/188

DESCRIPTION

This STREAMS-based driver provides console I/O when the system is running on an MVME141, MVME181 or MVME188 CPU board.  This driver is accessible only through the standard console device special files /dev/console (/dev/contty00), /dev/contty (/dev/contty01), and /dev/conctl. 

The device special files eventually access the STREAMS-based console driver which, when used in conjunction with the STREAMS line discipline module ldterm, supports the termios(2) and termio(7) processing. 

BOOT TIME DIAGNOSTICS

The Software Discernible Field Replaceable Unit (SDFRU) is the CPU board. 

Normal, Quick and Comprehensive diagnostic boot modes are the same. 

Diagnostic output verbosity mode of DV_OFF produces no diagnostic output. 

Diagnostic output verbosity mode of DV_LEVEL1 produces a single begin/end phase message pair. 

Diagnostic output verbosity mode of DV_LEVEL2 produces messages for the following steps:

begin initializing ports
after each port has been initialized
initializing timer preload value

Also, for each port, a message indicating whether or not DTR, DCD and CTS were detected will be displayed.  Note that "DTR", "DCD" and "CTS" are named relative to the chip registers and may not map directly to the same signals on the connector. 

Diagnostic output verbosity mode of DV_LEVEL3 produces no additional information. 

FRU STATUS

A D_FRU_STATUS call to driverinfo(D2DK) will return information about the SDFRU — the CPU — and each port. 

FILES

/dev/console
/dev/contty
/dev/contty??
/dev/conctl
/dev/edt/console

SEE ALSO

dcon(1A), mvmecpu(1M), termios(2), cons1x7(7), console(7), ldterm(7), termio(7), gencon(7), driverinfo(D2DK)