For the time board:

configured as xxMM:SS.ddd

A0=0
A1=40
A2=0
A3= the address of the GAZ board for time, 02 (homestraight) or 04 (backstraight)
A4=00 this is important, 4 is custom and 0 is 2400 baud

A5=00 1st digit is left blank
A6=00 no : or .

A7=13 is for M
A8=15 is for :

A9=14 is for M
B0=00 no : or .

B1=16 is for S
B2= 18 is for .

B3=17 is for S
B4= 00 no : or .

B5=19 is for 1/10
B6=00 no : or .

B7=20 is for 1/100
B8=00 no : or .

B9=21 is for 1/1000
C0=00 no : or .

AND for the Bib Rank:

A1=40
A3= address of GAZ, 01 (homestraight) or 03 (backstraight)
A5=13 for Bib 100's
A6=00 No : or .
A7=14 for Bib 10's
A8=00 No : or .
A9=16 for Bib 1's
B0=00 No : or .
B1=00 Blank digit
B2=00 No : or .
B3=00 Blank digit
B4=00 No : or .
B5=17 or 00 17 for Rank 100 or blank digit
B6=00 No : or .
B7=19 Rank 10's
B8=00 No : or .
B9=20 Rank 1's
C0=00 No : or .

Baud rate settings:

A1=41 4800 baud

A1=42 9600 baud

A1=43 19200 baud