Counts frames that are an integral number of bytes, have bad CRC and are between
64 and 1518 bytes in length (1536 if bit 8 is set in Network Configuration
register, 10240
bytes if bit 3 is set in the Network Configuration register). This register
is also incremented if a symbol error is detected and the frame is of valid length
and has an integral number of bytes.
This register is incremented for a frame with bad FCS, regardless of whether it
is copied to memory due to ignore FCS mode being enabled in bit 26 of the Network
Configuration register.