REG_VDP_MATRIX
io_write16(sd, REG_VDP_MATRIX + 0, state->conv->offint1);
io_write16(sd, REG_VDP_MATRIX + 2, state->conv->offint2);
io_write16(sd, REG_VDP_MATRIX + 4, state->conv->offint3);
io_write16(sd, REG_VDP_MATRIX + 6, state->conv->p11coef);
io_write16(sd, REG_VDP_MATRIX + 8, state->conv->p12coef);
io_write16(sd, REG_VDP_MATRIX + 10, state->conv->p13coef);
io_write16(sd, REG_VDP_MATRIX + 12, state->conv->p21coef);
io_write16(sd, REG_VDP_MATRIX + 14, state->conv->p22coef);
io_write16(sd, REG_VDP_MATRIX + 16, state->conv->p23coef);
io_write16(sd, REG_VDP_MATRIX + 18, state->conv->p31coef);
io_write16(sd, REG_VDP_MATRIX + 20, state->conv->p32coef);
io_write16(sd, REG_VDP_MATRIX + 22, state->conv->p33coef);
io_write16(sd, REG_VDP_MATRIX + 24, state->conv->offout1);
io_write16(sd, REG_VDP_MATRIX + 26, state->conv->offout2);
io_write16(sd, REG_VDP_MATRIX + 28, state->conv->offout3);