Mike-

I believe this comes from the era when RAM was limited and only one overlay/program could be loaded from the tape drive at a time

"tape drive" ... that's not an era, that's an epoch :-)

-Jeff

Quoting Mike Johnston <mjohns...@wiktel.com>:

On 2021-12-23 08:08, Shawn L wrote:
The C15/20 series is still pretty much all CLI, despite the fact that they've been saying they've had a GUI for years (awful, awful java-based thing).

The C15's CLI is not very intuitive, being a living relic of its DMS heritage.  There are different overlays you need to load to get into different administration areas of the C15.  I believe this comes from the era when RAM was limited and only one overlay/program could be loaded from the tape drive at a time. Much of that same paradigm still exists in the C15's current CLI. The CLI is accessible via serial and telnet, with no sign of ever being upgraded to use SSH.  There is no "up arrow" support.  That is, you can not press the up arrow key to get the previous command.  There is also no left/right arrow key support to assist you in modifying your current command.  Depending on your terminal settings, you may not have backspace support either.  There is no API, and it is very tedious to automate with expect scripts via the CLI.  Almost everything is in 3 or 4 character long keywords. You will eventually memorize many of them (CNAM, CND, CNB, CFW, etc), but you will forever be looking up many of these abbreviations in the manual (what is the difference between TR TTYP TERL, TRAL, TRAO, and TRAP?  How do these interact with the THGP or STN PICL setting?).

As for the GUI, as Shawn said, it is Java based.  As such, just assume it doesn't exist.

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