woo@pioneer.arpa (Alex Woo) (11/11/87)
In lieu of purchasing Graph-On 250's, I am looking for a terminal
emulation program which emulates some reasonable graphics terminal,
such as a Tek4014, but also has zoom and pan. A Tek4109 emulator
(not Tek4105) would be nice. Segments would also be nice but
not absolutely required.
We would prefer to use standard hardware such as a Hercules graphics
or VGA clone on an AT clone.
If you know of a good terminal emulator with zoom and pan, please
respond directly to me since I cannot keep up with the volume of
mail in this list.
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Alex Woo, MS 227-2 | wu@ames-aero.arpa
NASA Ames Research Center | woo@ames-nas.arpa
Moffett Field, CA 94035 | {seismo,topaz,lll-crg,ucbvax}!
Phone: (415) 694-6010 | ames!pioneer!woo
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{hplabs,hao,ihnp4,decwrl,allegra,tektronix,menlo70}!ames!pioneer!woo
======================================================================darrylo@hpsrlc.UUCP (11/12/87)
In comp.sys.ibm.pc, john1233@csd4.milw.wisc.edu (Thomas M Johnson) writes: > Well, I am about to purchase a PC clone. (to be exact a American > Research) and went to a friend's house to see it. (I'm buying it > from him used but still under warrenty). Well, we called this system > I'm on with his Avatex modem. > > Everytime a CR was encountered, the screen would flash. He says that > even happens where he works and it is the terminal program. > I think it was PC-Talk. > > Is this true? Is it the computer? Is it the modem? > Are there any terminal programs that don't flicker? > > Tom > john1233@csd4.milw.wisc.edu > or > tommyj@lakesys > ---------- Let me guess -- he has a color graphics card, right? I'm going to assume that he does. The "engineer" who designed the color graphics card did not design it such that both the video section and the CPU could access the video memory at the same time. As a result, a small amount of garbage can appear on the screen when the CPU accesses the video memory. To make things worse, the video circuitry outputs "white" (as opposed to "black", which would have made the problem slightly less obnoxious) when the CPU does so. To prevent lots of garbage from appearing on the screen when the CPU accesses the video memory to do things like scrolling, there is code in the BIOS to TURN OFF THE VIDEO while the accesses are being done, which causes the screen to flash. Yuk. With a 100% compatible color graphics card (there are some slightly non-standard cards which fix this problem), the screen will ALWAYS flash when scrolling. Double Yuk. -- Darryl Okahata {hplabs!hpccc!, hpfcla!} hpsrla!darrylo CompuServe: 75206,3074 Disclaimer: the above is the author's personal opinion and is not the opinion or policy of his employer or of the little green men that have been following him all day.