R_MD1
regs[R_MD1] = 0x00;
regs[R_MD1] = 0x77;
regs[R_MD1] = 0x73;
regs[R_MD1] = 0x71;
regs[R_MD1] = 0x7f & (div >> 16);
tda_reg("MAIN_DIV_BYTE_1 = 0x%02x\n", 0xff & regs[R_MD1]);