et(4) - NetBSD Manual Pages

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ET(4)                NetBSD/atari Kernel Interfaces Manual               ET(4)


NAME

     et -- driver for ET4000 VME graphics cards


SYNOPSIS

     et0 at vme0


DESCRIPTION

     The et device driver supports VME graphics cards based on the Tseng
     ET4000 chipset.  It supports the minimal ioctl's needed to run X11.  The
     8Kb control registers are mapped from offset 0x0 to offset 0x1fff and the
     1MB frame buffer is mapped from offset 0x400000 to offset 0x4fffff.  VGA
     compatible memory is mapped from offset 0xa0000 to offset 0xc0000.


HARDWARE

     Cards supported by the et driver include:

     Crazy Dots II VME graphics card


NOTES

     The clock generator on the Crazy Dots card is an ICS 1394M.  Setting the
     clock is done by writing to a register at offset 0x0.  This address can-
     not be read.  The values that can be written to the register and the
     associated clock are:

           Value     Clock
           0x00      14318
           0x10      16257
           0x17      20000
           0x0c      24000
           0x04      25175
           0x14      28332
           0x18      32514
           0x1a      36000
           0x1c      40000
           0x03      44900
           0x0f      50000
           0x13      50344
           0x07      56644
           0x11      65028
           0x1f      80000


FILES

     /dev/etvme


AUTHORS

     Julian Coleman


BUGS

     The driver does not support a text mode, so cannot be used as a console.

NetBSD 10.1                      July 30, 1998                     NetBSD 10.1