X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=dosdemo;a=blobdiff_plain;f=src%2Fdos%2Fvbe.c;h=5b1afb51b179d61996ed2f9b728b6b7701b18534;hp=009d5cac3485d7e8bab81874b0e077ad1be50c12;hb=5029eb9f7a538dd58e1c66c0945784acac8cc58b;hpb=8f7234e08947a80bace3643f37214c5fb076bdfe

diff --git a/src/dos/vbe.c b/src/dos/vbe.c
index 009d5ca..5b1afb5 100644
--- a/src/dos/vbe.c
+++ b/src/dos/vbe.c
@@ -130,6 +130,62 @@ void vbe_set_palette(int idx, int *col, int count, int bits)
 	}
 }
 
+int vbe_set_disp_start(int x, int y, int when)
+{
+	struct dpmi_real_regs regs;
+
+	memset(&regs, 0, sizeof regs);
+	regs.eax = 0x4f07;
+	regs.ebx = when & 0xffff;
+	regs.ecx = x & 0xffff;
+	regs.edx = y & 0xffff;
+	dpmi_real_int(0x10, &regs);
+
+	if(regs.eax == 0x100) {
+		return -1;
+	}
+	return 0;
+}
+
+int vbe_set_scanlen(int len, int mode)
+{
+	struct dpmi_real_regs regs;
+
+	memset(&regs, 0, sizeof regs);
+	regs.eax = 0x4f06;
+	regs.ebx = mode;
+	regs.ecx = len & 0xffff;
+	dpmi_real_int(0x10, &regs);
+
+	if(regs.eax == 0x100) {
+		return -1;
+	}
+	return regs.ecx & 0xffff;
+}
+
+int vbe_get_scanlen(int mode)
+{
+	int res;
+	struct dpmi_real_regs regs;
+
+	memset(&regs, 0, sizeof regs);
+	regs.eax = 0x4f06;
+	regs.ebx = 1;
+	dpmi_real_int(0x10, &regs);
+
+	if(regs.eax == 0x100) {
+		return -1;
+	}
+
+	if(mode == VBE_SCANLEN_PIXELS) {
+		res = regs.ecx & 0xffff;
+	} else {
+		res = regs.ebx & 0xffff;
+	}
+	return res;
+}
+
+
 static unsigned int get_mask(int sz, int pos)
 {
 	unsigned int i, mask = 0;