VT340 information

Patrick Finnegan wrote: The Text Programming manual doesn't provide much information about this, except to say (offhand, while dealing with differences between the VT241 and VT340) that the VT340 maps character attributes to colours, if you've set the "Color Map" feature in the Global Set-Up screen to "color 2". Colour map entry 7 corresponds to normal, 8 to negative and 15 to bold. It doesn't say how combinations of visual attributes map to colour map entries, so I'd set up 7 to 15 in different colours and experiment! There are two ways of setting up the displayed colours: 1. Using RGB or HLS coordinates in ReGIS mode. (Easy, as you've got the Graphics Programming volume) 2. Uploading all the colours at once, using DECRSTS to restore a colour table map. This needs some experimenting, so here are some hints from the manual: Request Color Table Report (DECRQTSR) CSI 2 ; Ps2 $ u where Ps2 = 0 -> HLS (default); 1 -> HLS; 2 -> RGB The terminal will send back a Color Table Report (DECCTR) DCS 2 $ s D...D ST where D...D is the data string containing the color table information. The data string is divided into groups of five values, as follows. Pc; Pu; Px; Py; Pz / Pc; Pu; Px; Py; Pz / ... where Pc is the color number (0 through 255). ; (semicolon, 3/11) separates the parameters. Pu indicates the universal coordinate system used (1=HLS,2=RGB) Px;Py;Pz are color coordinates in the specified coordinate system. Param HLS Values RGB Balues Px 0 to 360 (hue angle) 0 to 100 (red intensity) Py 0 to 100 (lightness) 0 to 100 (green intensity) Pz 0 to 100 (saturation) 0 to 100 (blue intensity) You can then restore color table information with: Restore Terminal State (DECRSTS) DCS 2 $ p D...D ST where D...D is as above. You could try restoring a partial table with this method. I'd like to know what happens. -- Paul