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Conference bulova::decw_jan-89_to_nov-90

Title:	DECWINDOWS 26-JAN-89 to 29-NOV-90
Notice:	See 1639.0 for VMS V5.3 kit; 2043.0 for 5.4 IFT kit
Moderator:	STAR::VATNE

Created:	Mon Oct 30 1989
Last Modified:	Mon Dec 31 1990
Last Successful Update:	Fri Jun 06 1997
Number of topics:	3726
Total number of notes:	19516

1655.0. "PYA0:/PKA0: - mystery devices" by KERNEL::WOOD (Richard Wood - UK Workstation Support) Thu Nov 02 1989 09:35

    
    Does anybody know what the devices, PYA0: and PKA0: are ?
    PYA0: seems to be utilized when using the client-server
    relationship for fileview applications.
    
    eg. From a wokstation(chinese workstation), set host to a
    big VAX, use SET DISPLAY/CREATE/NODE=wrkstn and finally
    $ SPAWN/NOWAIT RUN SYS$SYSTEM:VUE$MASTER.
    
    Any application created from the resulting fileview session
    results in a 'PYAn:' device on the client.
    
    Can anyone clarify what these devices (class of device)
    are, or point me to some documentation which does so.
    
    DECwindows Device Driver manual explains about I%An:
    and G%An: but I can't find info on the above.
    
    Thanks in advance
    
    Rich

T.R	Title	User	Personal Name	Date	Lines
1655.1	PY goes with TW	PRNSYS::LOMICKAJ		`Thu Nov 02 1989 13:47`	9
	The PY device is the application side of the pseudo-terminal driver. The terminal side is the TW device with the same unit number. Notice that you always have the same number of PY's as you do TW's. Generally, if you assign a channel to PYA0:, you get two devices created. A PYAn: and a TWAn:. Writes to the PY are seen as keystrokes to the TW, and writes to the TW may be picked up by reads to the PY. I don't know what the PK is.
1655.2		KIPPIS::PEURA	Pekka Peura, CSG-Helsinki	`Thu Nov 02 1989 14:39`	4
	PKDRIVER is the port driver for SCSI disks (in a similar manner as PUDRIVER is the port driver for UDA disks). Pekka