Rick Ehrhart ([log in to unmask]) wrote:
: Jeff Kell ([log in to unmask]) wrote:
: : On Mon, 11 Sep 1995 18:25:11 PDT Glenn Cole said:
: : >Okay, I give up. Why is it that FORMSPEC (B.06.04, on MPE/iX 4.0) lists,
in
: : >the "Forms file terminal selection" on a LIST report, a box for "IBM 3270"
: : >support? I have absolutely no idea what this means, or when it came into
: : >being.
 
- I think Rick was closest and Jeff was way out in the woods  ;-).
 
- As far as I remember, this field was introduced together with a product
  called SNA/DHCF (=Distributed Host Command Facility) around MPE/XL 2.1
  timeframe -- (I would almost bet on it) --.  IBM has (or at least used
  to have) a product called HCF (and DHCF?), which allows a 3270 terminal
  user to logon to another IBM system connecting through SNA network.
 
  Well, HP's SNA/DHCF allowed the IBM 3270 terminal user running (D)HCF to
  connect to an HP3000 over the SNA link AND THEN LOGON TO THE HP3000 AS
  AN NS/VT session!!!
 
  Yes, used an VT-pseudo ldev and vt_ldm as the logical device manager!
 
  In order to have VPLUS screens working, the forms needed to be recompiled
  for 3270 terminals.  Despite of all this, there were still some limitations
  simple because of physical differencies in terminals - one didn't even
  have all the keys the other did and so on...
 
Cheers,
:-) Eero - HP CSY Networking lab, NS services.