PersonalVRX “TigerShark” frame buffer
tvrx* at dio?
wsdisplay* at tvrx?
The PersonalVRX frame buffer is an accelerated, high resolution (1280x1024)
external display, connected to a 98702 DIO-II interface board. The external
display is composed of one (66570) or two (66570 with 66571 option) 8-bit
color frame buffer boards. Other option boards for the PersonalVRX family
include the 66572 ‘Z-buffer’, the 66573 ‘Transform Engine
and Scan’ board, and the 66574 ‘Colormap’. All models
also have four overlay planes.
driver provides a frame buffer abstraction
to the wscons(4)
Currently, the driver can only use the overlay planes, and will run as an
unaccelerated 16 color frame buffer.
2D acceleration is not available until the appropriate microrode has been
downloaded into the framebuffer control logic; unfortunately, neither the
microcode nor documentation about the download interface seems to be
The PersonalVRX devices can be configured using the 5 DIP switches selector on
the interface board to define the “select code”. The select code
value is computed by adding 133 to the number made from the five binary
digits. The default settings, with the two MSB switches set to 1 and the three
LSB switches set to 0, provide a select code of 157.