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\ Hypervisor Software File: framebuf.fth
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id: @(#)framebuf.fth 3.4 01/04/06
purpose: Variables and defer words used by many frame buffers drivers
copyright: Copyright 1990-2001 Sun Microsystems, Inc. All Rights Reserved
\ Variables that are useful for most kinds of frame buffers.
\ The definition of frame-buffer-adr has been moved to devtree.fth, as
\ frame-buffer-adr is now a fixed instance value. This was done as a
\ workaround for a problem with old FCode display drivers, some of which
\ use frame-buffer-adr for their selftest routines. With multiple frame
\ buffers on the same machine, a "test" command directed to a frame buffer
\ can screw up the console device.
\ 0 termemu-value frame-buffer-adr
0 termemu-value column# \ Cursor column number
0 termemu-value line# \ Cursor line number
d# 1152 termemu-value screen-width
d# 900 termemu-value screen-height
0 termemu-value window-top \ Pixel position of top of text area
0 termemu-value window-left \ Pixel position of left of text area
0 termemu-value emu-bytes/line
\ Interfaces to device-dependent graphics primitives:
d# 34 termemu-value #lines
d# 80 termemu-value #columns
termemu-defer draw-character
termemu-defer insert-characters
termemu-defer delete-characters
termemu-defer insert-lines
termemu-defer delete-lines
termemu-defer blink-screen
termemu-defer invert-screen
termemu-defer reset-screen
termemu-defer erase-screen
termemu-defer toggle-cursor
\ These values are available to the device-dependent routines.
\ The behavior of the device-dependent routines implicitly depends
true termemu-value showing-cursor? \ True to display text cursor
false termemu-value inverse-screen? \ True for overall black background
false termemu-value inverse? \ True for white characters on black background
\ true value frame-buffer-busy? \ If true, drivers must assume that the frame
\ \ buffer is in use by another program, which
\ \ may require extra action to ensure the
\ \ visibility of the displayed text.
\ \ For example, a frame buffer with an enable plane might require
\ \ that the enable plane be written to expose the character.
false termemu-value pending-newline?
\ True if the cursor is at the rightmost column but the next character
\ should be displayed on the next line
1 termemu-value #scroll-lines \ Number of lines to scroll
\ next-arg duplicate definition in fm/kernel/cmdline.fth
\ These variables are used to accumulate the optional numeric
\ argument or arguments of the escape sequence.
0 termemu-value arginit \ Remembers the "real" value of argument 0.
\ If arg0 is 0, it is changed to 1.
0 termemu-value foreground-color \ Color index for foreground
d# 15 termemu-value background-color \ Color index for background
false termemu-value 16-color? \ True if 16-color text is enabled
projects / OpenSPARC-T2-SAM / blob