[Search for users] [Overall Top Noters] [List of all Conferences] [Download this site]

Conference atlant::terminals

Title:	Traditional Video Terminals and Monitors
Notice:	See 3230 for Sun River information
Moderator:	REGENT::LASKO

Created:	Tue Mar 18 1986
Last Modified:	Thu May 22 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	3256
Total number of notes:	14159

3254.0. "DECRQCRA Definition/Algorithm?" by DOTWRK::LITT (Tim Litt) Mon May 12 1997 14:24

    I'm implementing DECRQCRA (checksum of rectangular area) in a
    terminal emulator.  All the user documentation says is that it returns
    a checksum; I suppose so one can compare "now" and "later".
    
    If the SRM had been updated, would a prefered checksum have been
    specified?  What would it be?  Or is one required?  Should the checksum
    be just on character data, or on attributes too?  Just character
    attributes, or including line attributes?  
    
    To emulate a 420 or 5xx or - should I be concerned about getting the
    same value, or are applications that save checksums longer than a 
    session considered broken?
    
    I just love reverse-engineering our own technology.
    
    Thanks!
    
    T

T.R	Title	User	Personal Name	Date	Lines
3254.1		JAMIN::OSMAN	Eric Osman, dtn 226-7122	`Mon May 12 1997 16:26`	4
	I just checked vtstar, unfortunately it never implemented that function. /Eric