Let us start here, from square one. No, from Zero!

hooks/graphics/backends/d3d9/shaders/vertex_shader.hlsl

@@ -0,0 +1,40 @@
+/*
+ * original source
+ *  vs.1.1 //Shader version 1.1
+ *  dcl_position v0;
+ *  dcl_color v1;
+ *  dcl_texcoord0 v2;
+ *  m4x4 oPos, v0, c0
+ *  mul oD0, v1, c4
+ *  mov oT0.xy, v2
+ *
+ * build command
+ *  fxc.exe /Vi vertex-shader.hlsl /Fh vertex-shader.h /T vs_1_1 /E vs_main
+ */
+
+float4x4 WorldViewProjection : register(c0);
+float4 ColorMultiply : register(c4);
+float2 ConstantHalfTexelFixupOffset : register(c63);
+
+struct VS {
+    float4 Position : POSITION;  // dcl_position v0;
+    float4 Color    : COLOR;     // dcl_color v1;
+    float2 TexCoord : TEXCOORD0; // dcl_texcoord0 v2;
+};
+
+VS vs_main(VS input)
+{
+    VS output;
+
+    output.Position = mul(input.Position, WorldViewProjection); // m4x4 oPos, v0, c0
+    output.Color.x  = mul(input.Color.x, ColorMultiply.x);      // mul oD0, v1, c4
+    output.Color.y  = mul(input.Color.y, ColorMultiply.y);
+    output.Color.z  = mul(input.Color.z, ColorMultiply.z);
+    output.Color.w  = mul(input.Color.w, ColorMultiply.w);
+    output.TexCoord = input.TexCoord;                           // mov oT0.xy, v2
+
+    // fix texture position
+    output.Position.xy += ConstantHalfTexelFixupOffset.xy * output.Position.w;
+
+    return output;
+}