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*                  DOCUMENTATION FILE FOR DTE48                     *

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DTE48 is a Dumb Terminal Emulator program for the HP48SX.  "Dumb"

implies that the terminal cannot be read by a remote system or

respond to inquiry commands like a VT100.



AT least 3 other "terminal" programs have been posted for the 48SX.

All have various limitations.  This one is not neccesarily better

than any of the others.





FEATURES

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1.)    Tramsmits upper and lower case as well as all of the ASCII

       control characters.

2.)    Characters are displayed AS THEY ARRIVE, not only when a full

       line is available.

3.)    The screen can be paused at any time.  This assumes the trans-

       mitting system handles XON/XOFF protocol and will not time-out

       and start resending.

4.)    7 line by 22 character scrolling display.





LIMITATIONS

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1.)    Probably not 100% reliable at 9600 baud.

2.)    Control characters (ASCII 1 thru 26) are not processed and

       are displayed as a dot.  Checking each individual character

       so as to process tabs, carriage returns and linefeeds slows

       it down too much.  An assembly language version is needed.





FILES

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There are only three.  DTE48 is the executable.  KEYMAP is a string

used for keycode translation.  TOGF is a flag toggling function.

Place the files in the directory of your choice.





RUNNING IT

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Setup the 48SX I/O for the required baud rate and enable XON/XOFF

protocol.  If you don't know what that means, read the manual!

Hit DTE48 to run.



Characters will be displayed starting on the bottom line and lines

will scroll upwards as needed.





KEY        UNSHIFTED RESULT   LEFT SHIFTED RESULT   RIGHT SHIFTED RESULT

--------   ----------------   -------------------   --------------------

A          a                  A                     ^A (ASCII 1)

B          b                  B                     ^B (ASCII 2)

C          c                  C                     ^C (ASCII 3)...



Z          z                  Z                     ^Z (ASCII 26)



1          1                  !

2          2                  @

3          3                  #

4          4                  $

5          5                  %

6          6                  ^

7          7                  &

8          8                  *

9          9                  (

0          0                  )

/          /                  ?

*          *                  (

-          -                  |

+          +                  =

.          .                  <

SPC        space              >

<-         backspace          delete

ENTER      carriage return    linefeed

DEL        QUIT               QUIT



                                                  

Hitting the ALPHA key will pause the display.  Hit it again to

continue.  The left shift and right shift keys are active for

one keystroke only.



All keys not defined above generate a space.





DISCLAIMERS

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NOTHING is guaranteed. I may or may not provide new versions.

Use it at your own risk.  Hack away at it and repost only if

you give me credit for the original version.  As always,

donations, government grants, presidential nominations, etc. are

greatfully accepted.



Kevin Jessup

9118 N. 85th St

Milwaukee, WI 53224


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