From 9fe4d4ea9c054e539ab679ed2e9c076c35beb69d Mon Sep 17 00:00:00 2001 From: etobi Date: Tue, 3 Sep 2013 09:48:45 +0200 Subject: Imported Upstream version 1.1.1+rev1355 --- util/alevt/README.OLD | 78 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 78 insertions(+) create mode 100644 util/alevt/README.OLD (limited to 'util/alevt/README.OLD') diff --git a/util/alevt/README.OLD b/util/alevt/README.OLD new file mode 100644 index 0000000..4fb0e41 --- /dev/null +++ b/util/alevt/README.OLD @@ -0,0 +1,78 @@ +Hi, Menden, 21 Sep 2000 + + This program decodes and displays Videotext/Teletext from a + /dev/vbi device. + + +COMPILE & INSTALL: + + There's nothing to configure. A simple 'make' is all. + If you do not want png support remove the WITH_PNG in + the Makefile. Additionally, if you want a smaller font + uncomment the "FONT=neep9" line. + + It gives you 'alevt', 'alevt-date', and 'alevt-cap' and + their man pages 'alevt.1x', 'alevt-date.1', and 'alevt-cap.1'. + + You can install them where ever you want (i.e. /usr/local/bin). + The programs are self-contained and require no other files. + + NOTE: Be careful with 'make install'. It's just for me :-) + + +PROBLEMS: + + If you have a lot of decoding errors (lot of these lightning symbols) + you may try pressing the 'f' and 'F' key. This allows fine tuning of + the decoder circuit. There's also a -finetune command line option. + This should only be necessary on really bad signals. + + Maybe, I add autotuning later... + + UPDATE: added autotuning. It's the default. If you add -debug the + the actions of the pll are printed to stdout. + + To get the old (pre finetune) behaviour start it with -finetune 0. + + UPDATE: disabled autotuning *g* sometimes it's too jumpy... + + +ALEVT-DATE: + I added a little tool to set the system time from the videotext + time. The date is not interpreted (not even transmitted on some + channels). So it allows only adjustment of +/-12 hours. + The default allowed adjustment is limited to +/-2 hours (use + -delta to change). Without the -set option it just display + the date in the format of the date command. Look at strftime(3) + for possible control sequences you may use in the -format option. + + +HACKING: + + If you want to play with the font size, you may resize it with + xv (xv font1.xbm). Just make sure, that its width is a multiple of + 32 and its height a multiple of 8. A simple make will create + a version of AleTV with the new font. Warning: a make clean + will erase font1.xbm. The next make will recreate font.xbm from + vtxt.bdf. + + AleVT has a built in page editor. If you start it with -editor + you may press 'E' to invoke it. For the usage you have to consult + the sources. (It's very crude!) + + +TODO: (no specific order) + + - Error correction in alevt-cap + - Better language support. Internal 16-bit charset. + - Separated graphics. + - Rewrite the whole stuff. A networked teletext daemon and clients + that connect to it for display, capture, cgi, ... + + +NEWER VERSIONS: + + The primary site of AleVT is http://goron.de/~froese + +Have fun, +Edgar Toernig (froese@gmx.de) -- cgit v1.2.3