3 ms·Upgrading a 1976 Altair 680 from FLEX 1.0 to FLEX 3.01 points by rwmj 4y agorwmj 4y agoPart 2: https://www.youtube.com/watch?v=TLzDI17AIU0 https://www.youtube.com/watch?v=TLzDI17AIU0