begin implementing RR-NET emulation registers.
add missing symbols to make simulatable, but rrnet functions not
yet plumbed in.
more work on RR-NET emulation.
implement more of the ethernet TX path for RR-NET emulation.
buffer ethernet frame bytes via RR-NET emulation registers.
actually send ethernet frame when indicated by RR-NET emulation
registers.
add extra RX buffer for RR-NET emulation and plumb in.
All RR-NET machinery should now be available.
fix perpetually mapped rr-net ethernet buffer.
try to fix visibility of packet arrival flag for RR-NET.
fix various bugs with RR-NET emulation
go back to sending real PING packet in test bench
fix writing of packet length header into correct moby of buffer.
register slowram address lines to improve timing.
insert delay before sending first frame to ease RR-NET debugging.
fix slowram access bug introduced with drive line.
try to fix buffer pointer handling for RR-NET buffer.
refine debug output for RR-NET TX flag.
add register to example eth_tx_state
fix bug where RR-NET eth TX would cause eth_tx_triggered to get
stuck.
pad ethernet runts