From v688.6 to v688.7 Software Stability issues were corrected;
 CR#73918, CR#73925, CR#73926, CR#70068, CR#73722, CR#73131

From v688.7 to v688.8 software 5 more isues were resolved;
 CR#73990: KHD: Embedded Audio was destroyed in (PAL) SD-Mode
 CR#73781: KDD: Auto-Chroma-Key with FGD was working only every second try
 CR#72649 & CR#53926: KDD: Some wipe pattern functions were not available
 CR#41254: KDD: If "KeyPVW" is activated the next BKGD-Transition showed a glitch 
                in that keyer due to wrong multiplicative key insertion.
 CR#74213: KDD&KHD: Recalling an E-MEM register without any keyframes could crash the 
                    mainframe when TiM/E Memo is in default mode
 
From v688.8 to v688.9 software new FPGA code was enabled to support a new part;
-KDD FPGA file DS0729.004 - fixed video distortions that came up with ..003 in V688_08
                          - support of Cypress Matrix RAM devices
                            If HW index of M/E board is > 50 the fpga ctrl bits are set 
                            accordingly. Thus this SW supports both:
                             - Micron Matrix RAM (M/E board HW index must be <  50)
                             - Cypres Matrix RAM (M/E board HW index must be >= 50
-KDD and KHD Frame:
  M/E couple data structures made more robust in case a Mainframe has no data 
  structures for Half M/E feature (e.g Kayak DD).