More HP microcode & loader rom detective work

I'm finally digging into my 21MX E-series machines in earnest. In trying to inventory and document what all I may have, I've found a few things that stump me and my "docs on hand". Perhaps folks here can shed some light on these. Mostly I'm looking for "confirm or deny" on some points. Loader roms I can't positively identify: 11B5790X012 This is in a system that has microcode roms 18A0580X012,18A0580X022,18A0580X032 I'm guessing something third party, or perhaps a later rev of DS/1000 or loader extensions? I'm clueless on these. 1816-0420 No clue 12531LDR This is a hand written tag. Perhaps for loading from the teletype builtin paper tape reader? 1816-0769 No clue Microcode roms I can't identify: 1816-0996 1816-0997 1816-0998 1816-0999 1816-1000 1816-1001 93585-80006 93585-80007 93585-80008 18A0580X012 18A0580X022 18A0580X032 And lastly, I'm confused about FFP. I am guessing that FFP required FP, which is supposed to be standard on E series. But a few lines in various docs make me think that perhaps older rev E series didn't have FP built in. Some docs mention that when ordering FFP, you can specify option -100 to get some additional roms, necessary for E series machines with a serial number less than 21XX (co-incidence on the rev number). I'm guessing that the additional roms are FP? The roms in question are: 13306-80013 13306-80014 13306-80015 13306-80016 13306-80017 13306-80018 Can anyone confirm or deny this? Thanks! Jay West --- [This E-mail scanned for viruses by Declude Virus]