MacDFT: Frozen Screen and LOGMODE Frame Sizes



I have a Token Ring problem related to MacDFT. When configuration
on the host changes, MacDFT doesn't work.

Configuration
Macintosh IIcx with Token Ring Card
AROSE Prep 1.1.1
Macintosh DFT 1.1

I am using my own LOGMODE table on the host. The following is copied from the
file TCBMODE ASSEBLE R1. Here is the default logmode that works:

M2SDLCQ MODEENT LOGMODE=M2SDLCQ
FMPROF=X'03'
TSPROF=X"03'
PRIPROT=X'B1'
SECPROT=X'90'
COMPROT=X'3080'
RUSIZES=X'8587'
PSERVIC=X'028000000000185000007E00'

This is IBM's mode. Here is a different logmode that is unique to my site.

TBR3180 MODEENT LOGMODE=TBR3180

FMPROF=X'03'
TSPROF=X"03'
PRIPROT=X'B1'
SECPROT=X'90'
COMPROT=X'3080'
RUSIZES=X'87C7'
PSERVIC=X'028000000000000000000300'

The problem is that when I use my own logmode, the screen freezes the session,
and the user has to do a terminal reset to return to normal. This problem is
consistently reproducible. The same problem does not occur when using Avatar
or MacIrma products.

The system network administrator asked for the "I" and "T" frame sizes
supported on our TokenTalk NB card, and this turns out to be the source of the
problem. The frame sizes are fixed at 256 and can't be modified. You chose to
provide multiple configurations for the frame sizes depending upon the user's
needs. If you make the change to Apple's supported size, your system should
work fine on the released version of MacDFT.


Published Date: Feb 18, 2012