SLIDAS an S-LINK Infinite Data Source

BUG DESCRIPTION

UXOFF# corrupts control words. Under certain conditions, the use of UXOFF# will corrupt control words. The symptoms can be:

End-of-block control word is 0x11111110 instead of 0xFFFFFFF0.
Control words are 0x00000000 or any other value that are neither 0x11111110 for a Start-of-Block control word nor 0xFFFFFFF0 for an End-of-Block control word.

Data/block error emulation doesn't work with UXOFF#. When UXOFF# is active (low), injecting errors with the Error push button will fail to generate errors correctly (LDERR# and LD[1:0] in control words).
LDOWN doesn't inhibit data generation. When placing LDOWN (SW9) to ENABLE, the SLIDAS should stop generating data and simulate a link down state.
Changing position of rotary switches should always reset the SLIDAS. As it is now, this does not happen if UXOFF# is active.
UTDO# is not latched at power up. It is only latched with URESET#.
URESET# does not stop the data generation. It just stops current data and starts with a new block.