ps_1_1								// Declare, PS v1.1

tex		t0							// Look up the base texture #0 from the base (scaled) coordinates

mul		r0, t0, v0.a				// Multiply the base texture #0 by its alpha value
mul		r0.rgb, r0, v0				// Multiply the alpha'd base texture by the diffuse color
+mov	r0.a, v1.b					// Move the actual alpha value into the output register
									// Instructions : 2 texture, 3 arithmetic = 5