Import sources from 2011-03-30 iso image

1 files changed, 96 insertions, 0 deletions

diff --git a/sys/src/cmd/aux/vga/s3801.c b/sys/src/cmd/aux/vga/s3801.c
new file mode 100755
index 000000000..acc8db47f
--- /dev/null
+++ b/sys/src/cmd/aux/vga/s3801.c
@@ -0,0 +1,96 @@
+#include <u.h>
+#include <libc.h>
+#include <bio.h>
+
+#include "pci.h"
+#include "vga.h"
+
+/*
+ * S3 86C80[15] GUI Accelerator.
+ */
+static void
+snarf(Vga* vga, Ctlr* ctlr)
+{
+	s3generic.snarf(vga, ctlr);
+}
+
+static void
+options(Vga*, Ctlr* ctlr)
+{
+	ctlr->flag |= Henhanced|Foptions;
+}
+
+static void
+init(Vga* vga, Ctlr* ctlr)
+{
+	ulong x;
+
+	s3generic.init(vga, ctlr);
+	vga->crt[0x3B] = vga->crt[0]-5;
+
+	if(vga->mode->z > 8)
+		error("depth %d not supported\n", vga->mode->z);
+
+	/*
+	 * Display memory access control.
+	 * Calculation of the M-parameter (Crt54) is
+	 * memory-system and dot-clock dependent, the
+	 * values below are guesses from dumping
+	 * registers.
+	 */
+	vga->crt[0x60] = 0xFF;
+	x = (vga->mode->x)/4;
+	vga->crt[0x61] = 0x80|((x>>8) & 0x07);
+	vga->crt[0x62] = (x & 0xFF);
+
+	if(vga->mode->x <= 800)
+		vga->crt[0x54] = 0x88;
+	else if(vga->mode->x <= 1024)
+		vga->crt[0x54] = 0xF8;
+	else
+		vga->crt[0x54] = 0x40;
+}
+
+static void
+load(Vga* vga, Ctlr* ctlr)
+{
+	ushort advfunc;
+
+	s3generic.load(vga, ctlr);
+	vgaxo(Crtx, 0x60, vga->crt[0x60]);
+	vgaxo(Crtx, 0x61, vga->crt[0x61]);
+	vgaxo(Crtx, 0x62, vga->crt[0x62]);
+
+	advfunc = 0x0000;
+	if(ctlr->flag & Uenhanced){
+		if(vga->mode->x == 1024 || vga->mode->x == 800)
+			advfunc = 0x0057;
+		else
+			advfunc = 0x0053;
+	}
+	outportw(0x4AE8, advfunc);
+}
+
+static void
+dump(Vga* vga, Ctlr* ctlr)
+{
+	s3generic.dump(vga, ctlr);
+}
+
+Ctlr s3801 = {
+	"s3801",			/* name */
+	snarf,				/* snarf */
+	options,			/* options */
+	init,				/* init */
+	load,				/* load */
+	dump,				/* dump */
+};
+
+Ctlr s3805 = {
+	"s3805",			/* name */
+	snarf,				/* snarf */
+	options,			/* options */
+	init,				/* init */
+	load,				/* load */
+	dump,				/* dump */
+};