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From: papa@uscacsc.UUCP
Newsgroups: comp.sys.amiga
Subject: Diga! VT100 bugs
Message-ID: <218@uscacsc.UUCP>
Date: Wed, 10-Jun-87 01:36:55 EDT
Article-I.D.: uscacsc.218
Posted: Wed Jun 10 01:36:55 1987
Date-Received: Sun, 14-Jun-87 01:38:49 EDT
Reply-To: papa@uscacsc.UUCP (Marco Papa)
Distribution: world
Organization: Felsina Software, Los Angeles
Lines: 72
Keywords: Diga!, terminal Emulation, VT100

I just run VTTest with Diga! VTTest is a program from Per Linberg of the 
University of Stokholm in Sweden (sorry if I misspelled anything) that was 
sent out over a year ago on USENET and that tests almost ALL of the VT100
features (VT52 and VT102 also).  These are the results (and the bad news for
Aegis):

1. Fails the cursor control test in one spot on the bottom right corner in 
both 80 and 132 character mode.

2. Fails control characters inside escape sequences.

3. Fails the Wrap Around test (this breaks EVERYTHING!).

4. Fail the black on white, white on black test.  Allows only white on black.

5. Does Bold in Red (funny since the Amiga does bold quite nicely).

6. Does not have the graphics font in either 80 or 132 char mode.
   The lack of graphics fonts makes it unusable with VAX VMS-based
   editors (EDT, TPU, EVE).  For example, boxes and diamonds are not there.

7. It does not have the Alternate ROM font.  Basically it has 2 fonts:
   a font for 80 char/line and a font for 128/132 char/line. That's it.

8. Prints garbage on the screen when double height or double width characters
   are requested. Most other VT100 emulators will just print the character 
   at normal size, but without garbage.

9. Prints garbage when the LED escapes are sent.

10. Does not work in VT52 mode.

11. PF1-PF4 are not automatically active with the correct sequence.  That is,
    you must get a VT100 manual, check the escapes and associate them with
    function keys.  Most other programs use F1-F4 on the Amiga to emulate 
    PF1-PF4. Not everybody has a VT100 manual handy!

12. The "," on the VT100 keypad is not emulated. Again you must do the job by 
    yourself as in 11.

13. Fails the Set/Reset of Newline Mode (another big bug).

14. Fails Report Terminal Status.

15. Fails Cursor Position Report (this is pretty bad, too).

16. Fails Terminal Parameter Report.

17. Does not support VT102 escapes for delete lines, delete chars, insert
    lines, insert chars.

18. Fails Reset command.

I did not try to test whether it supports the "real VT100 bugs" that are 
present in a VT100 from DEC, since it has got no chance given the above
results.  You might notice that, besides other commercial comm programs,
Dave Wecker's VT100 pd emulator properly handles almost all of the above.

It looks that the widely advertised "custom" emulator of Diga! just does
not work.

-- Marco

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Marco Papa            3175 S. Hoover St., Ste. 275            (213)669-1497
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