Read/Write Test pattern Control Register from External hardware

My current project uses external microprocessor (TI MSP430) to communicate with the VIP block. As for a beginner I tried out the Test Pattern since there were only four registers to work with -- just for the sake of simplicity. However, I have not been able to read or write any of the registers at all. They are always read back all zero's.

Question for your experts out there, do I need to do something special in order to get access to these registers?

Here are the steps coded in my external CPU:

Writing:

• Set Register# (control_av_address[1..0])

• Put data on the data bus (control_av_writedata[15..0])

• Write Pulse HI (control_av_write = 1)

• Delay 100us

• Write Pulse LO (control_av_write = 0)

Reading:

• Set Register# (control_av_address[1..0])

• Read Pulse HI (control_chipselect = 1)

• Delay 100us

• Read Pulse LO (control_chipselect = 0)

• Read Data bus (control_av_readdata[15..0])

Thanks in advance,

JIMMY