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
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.
As regards using smaller ROMs, the ROM select decoding is, IIRC, on the
Logic A PCB, with 4 chip select lines being fed to the ROM module. [Each
line enales 2 ROMs, the high and low bytes of the 16 bit word]. Anyway,
if you used smaller ROMs, unless you changed things on the Logic A PCB,
the ROM would not be a contiguous block, whihc would seem to be a Bad Thing.