send_isa_command
i = send_isa_command(CMD_ISA_IDLE);
one = send_isa_command(CMD_ISA_VERSION_INTEGER);
ten = send_isa_command(CMD_ISA_VERSION_TENTH);
hund = send_isa_command(CMD_ISA_VERSION_HUNDRETH);
minor = send_isa_command(CMD_ISA_VERSION_MINOR);
option_switches = send_isa_command(CMD_ISA_SWITCH_SETTINGS);
send_isa_command(CMD_ISA_DELAY_TIME_2SECS);