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Annotation of 43BSD/contrib/X/man/Xqvss.8c, revision 1.1.1.1

1.1       root        1: .TH XQVSS 8 "3 January 1985" "X Version 10"
                      2: .SH NAME
                      3: Xqvss - X window system QVSS implementation notes
                      4: .SH DESCRIPTION
                      5: .PP
                      6: The QVSS hardware in the DEC VS1 and VS2 is monochrome.
                      7: The usable size is 864 lines by 960 pixels/line.
                      8: (Future driver mods will default to 1024 pixels/line on the VR260 monitor
                      9: of the VS2, in Ultrix 1.2; for VR260 monitors under 1.1, patch
                     10: the kernel variable qv_def_scrn to 2.).
                     11: .PP
                     12: Probably the most irritating problem with the QVSS hardware is the
                     13: cursor support, which is limited to 16x16.
                     14: As only ``and'' and ``or'' operations are available in the hardware,
                     15: the driver inverts the cursor depending upon the pixels below
                     16: the cursor.
                     17: We will eventually get fed up and implement a software cursor.
                     18: .PP
                     19: Under Ultrix-32 release 1.1 and 4.2BSD,
                     20: the window system will be slightly unreliable due
                     21: to a kernel problem.
                     22: Fixed in Ultrix32 release 1.2.
                     23: Under Ultrix-32 1.1, your best bet is to use unix domain connections
                     24: (unix:0 as host spec's) for local connections.
                     25: .PP
                     26: Thanks must go to Dave Carver (and others) in the DEC Workstations
                     27: group for implementing the bit-blit library.
                     28: Large area bit-blit code is compiled on the fly and runs at optimal
                     29: speed.
                     30: .PP
                     31: Performance is now tolerable, between 3400 and 4200 characters/second
                     32: on a VS2.
                     33: Performance on a VS1 is approximately 2000 characters/second.
                     34: Some further improvement can be expected.
                     35: .SH "SEE ALSO"
                     36: X(8c), X(1)
                     37: .br
                     38: `Xlib - C Language X Interface'
                     39: .br
                     40: `ddX - Device Dependent X Interface'
                     41: .SH AUTHOR
                     42: .br
                     43: Copyright (c) 1984, 1985, 1986 by Massachusetts Institute of Technology.
                     44: .br
                     45: See X(1) for a complete Copyright notice.

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