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- From: ratinox@splinter.coe.northeastern.edu (Richard Pieri/Stainless Steel Rat)
- Newsgroups: gnu.emacs.help
- Subject: Re: Trouble installing demacs
- Message-ID: <RATINOX.92Aug16201738@splinter.coe.northeastern.edu>
- Date: 17 Aug 92 00:17:38 GMT
- References: <ARA.92Aug15234808@camelot.ai.mit.edu>
- Sender: usenet@chaos.DAC.Northeastern.edu
- Reply-To: ratinox@meceng.coe.northeastern.edu
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- In-reply-to: ara@zurich.ai.mit.edu's message of 16 Aug 92 04:48:08 GMT
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-
- >>>>> "AA" == Allan Adler <ara@zurich.ai.mit.edu> writes:
-
- AA> The environment variable TERM is set to ibmpc. What happens is that
- AA> when I type demacs, demacs does boot up but fails to use the full
- AA> screen. Instead everything is scrunched together and the ]K and ]B and
- AA> other junk is plainly visible. In fact, here is what it looks like:
-
- You need to load the ANSI.SYS driver, or a compatable driver like NANSI.SYS
- or Fansi Console, from your CONFIG.SYS file. ANSI.SYS comes with all
- versions of DOS.
-
- The more technical answer:
-
- Termcap is a file of "TERMinal CAPabilities" and the escape codes (special
- character sequences) to make each type of screen do things like scrolling
- and clearing. This is a commonly used method of allowing programs on multi-
- user systems (like most Unix systems) to use almost any kind of terminal in
- existance. GNU Emacs uses termcap, so DEmacs uses termcap.
-
- Normally, screen updates on an IBM-PC are done through BIOS calls or direct
- screen updating, something that a termcap-driven program can't do. But DOS
- comes with a nifty little driver called ANSI.SYS, which allows you to
- "print" certain escape codes to make the screen do things; the driver
- translates the codes into BIOS calls. And the "ibmpc" entry in the termcap
- file that comes with DEmacs is set up to use the IBM ANSI codes.
-
- --Rat
-
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