Screen sizes [ SNA IMF Programmer's Reference Manual ] MPE/iX 5.0 Documentation
SNA IMF Programmer's Reference Manual
Screen sizes
This section explains the differences between IMF/3000 screen sizes and
SNA IMF screen sizes.
IMF/3000
Screen size is specified either by the IBM host or in the configuration
file on the HP 3000. After Pass Thru is started, the screen size is
assumed to be whatever was configured in the IMF/3000 configuration file.
SNA IMF
Like IMF/3000, SNA IMF allows the host to set the screen size. However,
screen size cannot be specified on the HP 3000. As part of SNA protocol,
the IBM host sends a BINDcommand at the beginning of a session. The BIND
command, which is transparent to the user, establishes the screen size
for SNA IMF. A screen must be 480, 1920, or 3440 characters; otherwise,
SNA IMF rejects it.
MPE/iX 5.0 Documentation