TULIP4041 Startup Question

[rocket.scientist]

Update thus far. I am using a stock HP-41CX.

1) Native HPIL with HP 82162A printer works perfectly. Print functions work as expected. DIR returns "NO DRIVE".
2) Native HPIL with HP 82161A drive works perfectly. DIR returns list of files on cassette, or "NO MEDIA" without a cassette inserted.
3) PIL-Box with virtual HP 82161A drive and HP 82162A printer works perfectly for both print and drive commands.

At this point I know my 41CX and HPIL circuit works as expected. Now, on to the TULIP.

4) RP2 received and installed into TULIP-devboard. Firmware 00.01.03 installation went perfectly, and confirmed in com0.
5) JP2 is installed, as is U5. Continuity for FI confirmed from the HP native module connector, through the adapter, cable and J4, to pin 3 of U5. Continuity also confirmed from pin 2 of U5, through J2 to pin 4 of the PICO 2.
6) ran plug hpil, confirmed enabled with plug status, then ran tracer hpil.
6) pyilper reconfigured to connect to PILBOX serial port on TULIP, and restarted.
7) Executing DIR on the 41CX again returns TRANSMIT ERR. Ugh. :-(

I am still digging and will post any new revelations here.