mbrands@idca.tds.PHILIPS.nl (Manfred Brands) (03/31/89)
I just received a xenix package including development and text processing
system and I have two questions regarding nroff and troff.
- Nroff uses file from /usr/lib/term.
Has anybody managed to create drivers for the ANSI screen and/or EPSON
printers. I can't get characters in the driver having the eight bit on.
I read in the documentation that this couses nroff to go into plot mode,
whatever this may be in a character oriented text processor.
For my EPSON printer I could print each character using an escape
sequence telling the printer to set the eight bit to 1, send the
character with the eight bit off and an escape sequence to tell my
EPSON to clean the eight bit.
But this way I need 5 characters instead of 1.
And I can't use it for my screen.
- Troff generates files for a C/A/T phototypesetter
Does anybody know what the format is of the commands used.
Again, has anybody made a driver for an EPSON and/or EGA/HERCULES
grafics.
Any help would be appreciated,
Manfred.
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# 7300 AE Apeldoorn, The Netherlands #chip@vector.Dallas.TX.US (Chip Rosenthal) (04/08/89)
In article <356@ssp2.idca.tds.philips.nl> mbrands@idca.tds.PHILIPS.nl (Manfred Brands) writes: >- Nroff uses file from /usr/lib/term. I post because somebody else might be interested. There are two parts to my solution to using SCO's nroff. I've implemented it for HP LaserJet and Okitdata 193-type printers. The first part is the nroff driver tables which include the appropriate escape codes and special characters. The second part is a filter called "colpr", which serves a number of functions. First, it filters backspaces into multiple printhead passes. Second, it performs line folding/truncation. Third, it performs NL to CR/LF translation. Finally, it cooperates with the driver tables to access the full 8-bit character set. > I can't get characters in the driver having the eight bit on. That's correct. My solution was to use a flag character in the nroff driver table to set the eight bit. I arbitrarily chose DEL (octal 177) as the flag character. For example, to generate an octal 201, my nroff driver table emits the two character sequence { DEL, 001 }, and "colpr" restores it. However, if you are using this, you can't use the "col" program. If you run "col" before "colpr", it strips the DEL characters. If you run "col" after "colpr", it strips the MSB. >- Troff generates files for a C/A/T phototypesetter There is a filter in the USENET archives called "cat2dit" which translates C/A/T codes to ditroff output. I've been told that there are some problems with this filter, but I believe Mike Slifcak <slif@oliven.atc.olivetti.com> has hacked on it enough to get output from SCO's troff to work with Rick Richardson's jetroff. -- Chip Rosenthal / chip@vector.Dallas.TX.US / Dallas Semiconductor / 214-450-5337