cheselka@cactus.org (Mike R. Cheselka) (04/02/91)
I have a vt220 by digital, the real thing, not a clone. What is the 'Compose Character' key for? How can I use it? Can I 'save' stuff to the function keys so that I power up with Hayes AT commands on them? Are there any roms out there for Japanese characters sets? More generally, would some kind soul send me some information about the differences between the various vt### terminals? I always use the vt100 set up, how would vt220 be better? Can graphics be viewed, like gifs or bitmaps? Any responses would be apreciated. I would esp. like encyclopedic amounts of information :-)
conrad@tharr.UUCP (Conrad Longmore) (04/04/91)
In article <6171@cactus.org> cheselka@cactus.org (Mike R. Cheselka) writes: > >I have a vt220 by digital, the real thing, not a clone. What is the >'Compose Character' key for? How can I use it? The 'Compose' key is for creating high-order ascii characters, and other ascii characters not on the keyboard. To use it, you must operate the terminal in an eight-bit environment, and be using the VT in VT220 mode. Put simply, you compose an accented character by a two or three character sequence, e.g. for A-umlaut you would type COMPOSE A ", for c-cedilla type COMPOSE c , ... for GB pound sign it's COMPOSE l =, for Japanese yen it's COMPOSE Y =. Most of the accented characters are fairly easy to guess once you understand the principle of 'combining' the ascii characters. >Can I 'save' stuff to the >function keys so that I power up with Hayes AT commands on them? The contents of the function keys are host-writable, but the VT220 loses the settings when turned off. You could look at the ANSWERBACK field though. >Are there >any roms out there for Japanese characters sets? The character matrix on the VT220 is a bit too crude to allow much in the way of Japanese, as the chinese root symbols that most of Japanese starts words with are too complex to the represented properly. Terminals such as the VT320 have more complex character matrices. >More generally, would >some kind soul send me some information about the differences between the >various vt### terminals? I always use the vt100 set up, how would vt220 >be better? Can graphics be viewed, like gifs or bitmaps? The VT220 is a text-only terminal. A quick guide as to the main differences between the VT terminals follows: Terminal Extended Mono Colour Redefinable Refresh Dual Host keybd? Graph? Graph? characters? rate (2 sessions)? VT52 No No No No 60Hz No VT100 No No No No 60Hz No VT125 No Yes No No 60Hz No VT220 Yes No No Yes 60Hz No VT230 Yes Yes No Yes 60Hz No VT240 Yes No Yes Yes 60Hz No VT320 Yes No No Yes 60Hz No VT330 Yes Yes No Yes 60Hz Yes ** VT340 Yes No Yes Yes 60Hz Yes ** VT420 Yes No No Yes 70Hz Yes ** VT1000 Yes Yes (Monochrome X-windows terminal) VT1200 Yes Yes (Monochrome X-windows terminal) ** VT1300 Yes No Yes (Colour X-windows terminal) ** All VT100-400 terminals are ANSI X3.41-1977 and X.3.64-1979 compliant. VTx30 and x40 terminals use Regis graphics, which can provide bitmapped displays. The VT340 display is very similar to EGA. Terminals marked with ** are current digital terminals. -- // Conrad Longmore / Uucp: ..!ukc!axion!tharr!conrad / All opinions // // Eniac Programmer/ Janet: tharr!conrad @ uk.ac.ukc / stated are // // Bedford College / YelNet: +44 234 345151 x5350/1 / belong to // // Computer Centre / Linenoise research a speciality / someone else // // ** T H A R R ** / Free access to Usenet in the UK / * 0234 720202 *//