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Annotation of 43BSDTahoe/new/X/man/man8/Xqvss.0, revision 1.1.1.1

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                      4: XQVSS(8)           UNIX Programmer's Manual             XQVSS(8)
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                      8: NAME
                      9:      Xqvss - X window system QVSS implementation notes
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                     11: DESCRIPTION
                     12:      The QVSS hardware in the DEC VS1 and VS2 is monochrome.  The
                     13:      usable size is 864 lines by 960 pixels/line.  (Future driver
                     14:      mods will default to 1024 pixels/line on the VR260 monitor
                     15:      of the VS2, in Ultrix 1.2; for VR260 monitors under 1.1,
                     16:      patch the kernel variable qv_def_scrn to 2.).
                     17: 
                     18:      Probably the most irritating problem with the QVSS hardware
                     19:      is the cursor support, which is limited to 16x16. As only
                     20:      ``and'' and ``or'' operations are available in the hardware,
                     21:      the driver inverts the cursor depending upon the pixels
                     22:      below the cursor. We will eventually get fed up and imple-
                     23:      ment a software cursor.
                     24: 
                     25:      Under Ultrix-32 release 1.1 and 4.2BSD, the window system
                     26:      will be slightly unreliable due to a kernel problem.  Fixed
                     27:      in Ultrix32 release 1.2.  Under Ultrix-32 1.1, your best bet
                     28:      is to use unix domain connections (unix:0 as host spec's)
                     29:      for local connections.
                     30: 
                     31:      Thanks must go to Dave Carver (and others) in the DEC Works-
                     32:      tations group for implementing the bit-blit library.  Large
                     33:      area bit-blit code is compiled on the fly and runs at
                     34:      optimal speed.
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                     36:      Performance is now tolerable, between 3400 and 4200
                     37:      characters/second on a VS2.  Performance on a VS1 is approx-
                     38:      imately 2000 characters/second.  Some further improvement
                     39:      can be expected.
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                     41: SEE ALSO
                     42:      X(8c), X(1)
                     43:      `Xlib - C Language X Interface'
                     44:      `ddX - Device Dependent X Interface'
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                     46: AUTHOR
                     47:      Copyright (c) 1984, 1985, 1986 by Massachusetts Institute of
                     48:      Technology.
                     49:      See X(1) for a complete Copyright notice.
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                     63: Printed 9/15/87          3 January 1985                         1
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