NAME

dumpapa8c − dump apa8c display memory as a binary file

SYNOPSIS

dumpapa8c

DESCRIPTION

Dumpapa8c copies the contents of the apa8c display memory to the standard output for redirection to a binary file or for processing as a bitmap image. 

The output consists of a two-integer header (horizontal image size in pixels; vertical image size in pixels) followed by the image itself in left-to-right, top-to-bottom order, (horizontal_pixels / 8) bytes per scanline. For the apa8c the horizontal size is 720; the vertical size is 512. 

Before any image dumping is begun, /dev/apa8c is opened to be sure the device is present. 

Dumpapa8c is provided primarily for use by bitprt(1).

FILES

/dev/apa8c
/dev/bus

SEE ALSO

bitprt(1), lpr(1), scale(1), ibm6154(4), lp(4), lpfilter(8R)

BUGS

Hardware limitations allow dumping only one display plane at a time, as controlled by the display adapter’s Color Plane Select Register.  Dumpapa8c assumes it was set correctly. 

If the apa8c was in glass-tty mode, the screen is cleared when dumpapa8c completes. 

PRPQs 5799-WZQ/5799-PFF: IBM/4.3  —  15 Dec 1986