Roger Bolan wrote:
I also normally use 3278A because I sometimes need to work with APL code.
On the system I'm currently using there are 29 different terminal types
listed at the bottom of the Settings menu. To see the explanation for
each, just put your cursor on the entry field and press PF1.
The help is inadequate. It says nothing about how the terminal type
setting influences the data stream.
For the 3278T setting I use, it says simply "(3276, 3278, or 3279
terminal with TEXT keyboard)". Tracing shows that this setting causes
ISPF to recognize certain character values in the data stream and
convert them to graphics escape sequences. For example, the x'AC'
character is written to the display as x'08C5' which is the "upper left
corner" graphical drawing character.
I suspect a) that the original devices with this TEXT keyboard had a
special shift key or something that would allow input of these graphical
drawing characters, b) that this function predated the advent of the
graphics escape character set, and c) that the drawing characters
appeared correctly without translation on those devices.
Presumably, ISPF translates for graphics-escape-capable emulators to
provide end-user-apparent compatibility for text-based graphics built
using those devices. I have not been able to find this behavior
documented ANYWHERE!
--
Edward E Jaffe
Phoenix Software International, Inc
5200 W Century Blvd, Suite 800
Los Angeles, CA 90045
310-338-0400 x318
[EMAIL PROTECTED]
http://www.phoenixsoftware.com/
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