Hi jhorsburgh,

I've never used that program before, but looking at the code, it appears that each bit in the LATCH_MASK constant determines if the corresponding channel is Latched or Momentary.

0xFF = all output's latched
0x00 = all output's momentary
0xF0 = top 4 bit's Latched, bottom 4 momentary.

I beleive VALID_BIT should also be 8, for the 8 channel version.

hth,