PDP11/73 bootstrap ROMs

[Gordon JC Pearce]

Well, I've run into an interesting problem with my PDP11/73.  One of the 
boot ROMs (the low byte) has gone phut - just reads back 0377 at all 
addresses.  I've proved it's the ROM that's at fault.

Is there a particular "favourite" boot ROM for the PDP11?  I'm not sure 
quite what mine was - it is used with a Baydel multifunction card (LTC, 
console SLU and boot) and displayed a "COLLEGE OF AGRICULTURE" logo (the 
machine originally came from Aberdeen College of Agriculture), and had 
the option to boot a few different devices, including RL02, RX02 and MSCP.

I can get it to boot by typing in a loader in octal, after hitting BREAK.

Gordon.