SAMPA_0[0] -> GBTx_0, G0, 0
SAMPA_0[1] -> GBTx_0, G0, 2
SAMPA_0[2] -> GBTx_0, G0, 4
SAMPA_0[3] -> GBTx_0, G0, 6
SAMPA_0[4] -> GBTx_0, G1, 8
SAMPA_0[5] -> GBTx_0, G1, 10
SAMPA_0[6] -> GBTx_0, G1, 12
SAMPA_0[7] -> GBTx_0, G1, 14
SAMPA_0[8] -> GBTx_0, G2, 16
SAMPA_0[9] -> GBTx_0, G2, 18
SAMPA_0[10] -> GBTx_0, G2, 20

SAMPA_1[0] -> GBTx_0, G2, 22
SAMPA_1[1] -> GBTx_0, G3, 24
SAMPA_1[2] -> GBTx_0, G3, 26
SAMPA_1[3] -> GBTx_0, G3, 28
SAMPA_1[4] -> GBTx_0, G3, 30
SAMPA_1[5] -> GBTx_0, G4, 32
SAMPA_1[6] -> GBTx_0, G4, 34
SAMPA_1[7] -> GBTx_0, G4, 36
SAMPA_1[8] -> GBTx_0, G4, 38
SAMPA_1[9] -> GBTx_0, G5, 1
SAMPA_1[10] -> GBTx_0, G5, 3

SAMPA_2[0] -> GBTx_0, G5, 5
SAMPA_2[1] -> GBTx_0, G5, 7
SAMPA_2[2] -> GBTx_0, G6, 9
SAMPA_2[3] -> GBTx_0, G6, 11
SAMPA_2[4] -> GBTx_0, G6, 13
SAMPA_2[10] -> GBTx_0, G6, 15 (multidrop)

------------------------------- GBTx boundary

SAMPA_3[0] -> GBTx_1, G0, 0
SAMPA_3[1] -> GBTx_1, G0, 2
SAMPA_3[2] -> GBTx_1, G0, 4
SAMPA_3[3] -> GBTx_1, G0, 6
SAMPA_3[4] -> GBTx_1, G1, 8
SAMPA_3[5] -> GBTx_1, G1, 10
SAMPA_3[6] -> GBTx_1, G1, 12
SAMPA_3[7] -> GBTx_1, G1, 14
SAMPA_3[8] -> GBTx_1, G2, 16
SAMPA_3[9] -> GBTx_1, G2, 18
SAMPA_3[10] -> GBTx_1, G2, 20

SAMPA_4[0] -> GBTx_1, G2, 22
SAMPA_4[1] -> GBTx_1, G3, 24
SAMPA_4[2] -> GBTx_1, G3, 26
SAMPA_4[3] -> GBTx_1, G3, 28
SAMPA_4[4] -> GBTx_1, G3, 30
SAMPA_4[5] -> GBTx_1, G4, 32
SAMPA_4[6] -> GBTx_1, G4, 34
SAMPA_4[7] -> GBTx_1, G4, 36
SAMPA_4[8] -> GBTx_1, G4, 38
SAMPA_4[9] -> GBTx_1, G5, 1
SAMPA_4[10] -> GBTx_1, G5, 3

SAMPA_2[5] -> GBTx_1, G5, 5
SAMPA_2[6] -> GBTx_1, G5, 7
SAMPA_2[7] -> GBTx_1, G6, 9
SAMPA_2[8] -> GBTx_1, G6, 11
SAMPA_2[9] -> GBTx_1, G6, 13
SAMPA_2[10] -> GBTx_1, G6, 15 (multidrop)
