The roms on my integral are HP-UX V1.0 and uses both pcb's for HP-UX I
 suppose they used smaller roms in the first version or HP-UX V1.0 takes more
 place. 
 Is it the same PCB? haev V5.0 in my Integrals, and the daugherboard
 connectors are 2 row things (I think 2 rows of 10 pins each), a plug at
 one end of the PC, a socket at the other, so that the daughterboard can
 only fit one way round. But I am sure I've een a picutre of an Itengral
 ROM module PCB on one of the websites which appears to have SIL
 connectors for the daughterboard.
 
 
Replying to an old message here.
In case anyone is interested, this is what the inside of an HP IPC ROM
module looks like with the optional BASIC ROMs: