Per-pixel Lambert diffuse with ambient (ARBvp1.0 & ARBfp1.0). Works on Intel GMA945

!!ARBvp1.0
OPTION     ARB_position_invariant;
ATTRIB     iN      = vertex.normal;
PARAM      mvit[4] = {state.matrix.modelview.invtrans};
OUTPUT     oN      = result.texcoord[7];
DP4        oN.x, mvit[0], iN;
DP4        oN.y, mvit[1], iN;
DP4        oN.z, mvit[2], iN;
MOV        result.color, vertex.color;
END

!!ARBfp1.0
ATTRIB     iP      = fragment.position;
ATTRIB     iC      = fragment.color;
ATTRIB     iN      = fragment.texcoord[7];
PARAM      amb     = {0.5, 0.3, 0.036, 1.0};
PARAM      l0pos   = state.light[0].position;
TEMP       toL, tmpC, n1;
OUTPUT     oC      = result.color;
ADD        toL, l0pos, -iP;
DP3        toL.w, toL, toL;
RSQ        toL.w, toL.w;
DP3        n1.w, iN, iN;
RSQ        n1.w, n1.w;
MUL        n1.xyz, n1.w, iN;
MUL        toL.xyz, toL.w, toL;
DP3_SAT    tmpC, toL, n1;
MAD        tmpC, tmpC, iC, amb;
MOV        tmpC.w, 1;
MOV        oC, tmpC;
END