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allow the displayed area to start anywhere in display memory, 

add a "dispoffset" variable to control this
This commit is contained in:
drochner 1998-07-24 16:12:18 +00:00
parent 137185670b
commit 7764b57db5
2 changed files with 21 additions and 13 deletions
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30
sys/dev/ic/pcdisplay_subr.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: pcdisplay_subr.c,v 1.5 1998/06/26 21:05:20 drochner Exp $ */
/* $NetBSD: pcdisplay_subr.c,v 1.6 1998/07/24 16:12:18 drochner Exp $ */
/*
* Copyright (c) 1995, 1996 Carnegie-Mellon University.
@ -58,10 +58,10 @@ pcdisplay_cursor(id, on, row, col)
if (scr->active) {
if (!on) {
/* XXX disable cursor how??? */
row = col = -1;
}
pos = row * scr->type->ncols + col;
pos = -1;
} else
pos = scr->dispoffset / 2
+ row * scr->type->ncols + col;
pcdisplay_6845_write(scr->hdl, cursorh, pos >> 8);
pcdisplay_6845_write(scr->hdl, cursorl, pos);
@ -97,7 +97,7 @@ pcdisplay_putchar(id, row, col, c, attr)
off = row * scr->type->ncols + col;
if (scr->active)
bus_space_write_2(memt, memh, off * 2,
bus_space_write_2(memt, memh, scr->dispoffset + off * 2,
c | (attr << 8));
else
scr->mem[off] = c | (attr << 8);
@ -118,8 +118,10 @@ pcdisplay_copycols(id, row, srccol, dstcol, ncols)
dstoff += dstcol;
if (scr->active)
bus_space_copy_region_2(memt, memh, srcoff * 2,
memh, dstoff * 2, ncols);
bus_space_copy_region_2(memt, memh,
scr->dispoffset + srcoff * 2,
memh, scr->dispoffset + dstoff * 2,
ncols);
else
bcopy(&scr->mem[srcoff], &scr->mem[dstoff], ncols * 2);
}
@ -142,7 +144,8 @@ pcdisplay_erasecols(id, row, startcol, ncols, fillattr)
val = (fillattr << 8) | ' ';
if (scr->active)
bus_space_set_region_2(memt, memh, off * 2, val, ncols);
bus_space_set_region_2(memt, memh, scr->dispoffset + off * 2,
val, ncols);
else
for (i = 0; i < ncols; i++)
scr->mem[off + i] = val;
@ -163,8 +166,10 @@ pcdisplay_copyrows(id, srcrow, dstrow, nrows)
dstoff = dstrow * ncols + 0;
if (scr->active)
bus_space_copy_region_2(memt, memh, srcoff * 2,
memh, dstoff * 2, nrows * ncols);
bus_space_copy_region_2(memt, memh,
scr->dispoffset + srcoff * 2,
memh, scr->dispoffset + dstoff * 2,
nrows * ncols);
else
bcopy(&scr->mem[srcoff], &scr->mem[dstoff],
nrows * ncols * 2);
@ -189,7 +194,8 @@ pcdisplay_eraserows(id, startrow, nrows, fillattr)
val = (fillattr << 8) | ' ';
if (scr->active)
bus_space_set_region_2(memt, memh, off * 2, val, count);
bus_space_set_region_2(memt, memh, scr->dispoffset + off * 2,
val, count);
else
for (i = 0; i < count; i++)
scr->mem[off + i] = val;

4
sys/dev/ic/pcdisplayvar.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: pcdisplayvar.h,v 1.3 1998/06/26 21:05:20 drochner Exp $ */
/* $NetBSD: pcdisplayvar.h,v 1.4 1998/07/24 16:12:18 drochner Exp $ */
/*
* Copyright (c) 1998
@ -42,6 +42,8 @@ struct pcdisplayscreen {
int cursoron; /* cursor displayed? */
int vc_ccol, vc_crow; /* current cursor position */
int dispoffset; /* offset of displayed area in video mem */
};
struct pcdisplay_handle {