HP HP-2117F on ebay
jwest at classiccmp.org
Thu Dec 14 12:40:24 CST 2006
> Of the three 1000F I have all have their firmware in slot 10 on a FAB
> because the mainboard simply doesn't have enough sockets for all the ROMs.
I doubt that seriously. I'd like to see how you could put a FAB board in an
I/O slot ;)
On most 21MX/F's the general F-specific microcode was put on a FAB board
which goes under the cpu board (as a daughtercard). The reason was simple -
they didn't want to waste an I/O slot with a FEM. Another reason is because
many systems had hard coded requirements of what boards you put in what I/O
slots, and a FEM board messed things up. When the FAB board ran out of room
then they'd start going to a FEM. When possible, I like to remove the FAB
and only use the FEM as it's easier to get to the roms and change them (and
I change them a lot). Most people would rather use the FAB as firmware was
rarely changed and they valued the I/O slot real-estate.
A wild guess - this system had vendor supplied proprietary microcode on the
FEM that was in slot 10. When the system was decomissioned, the licensed
firmware board (the whole FEM) was yanked. The F microcode is likely on the
More to the point... note that a FAB (and FEM) was optional on the E series.
On the F series, the FAB was required but the FEM was optional. Why? See
>> 5) There appears to be something homebrew on the TBG board in slot 11.
> Doesn't hurt.
Well, it sure could if you need a TBG and don't have one already. What if
the cable was to generate interrupts to the host from an external device,
and the setup was a 'normally closed' configuration? Your processor would
become rather sluggish when interrupts were armed :D
> These are simple digital I/O boards. But thanks to DCPC any board supports
> DMA :-)
There is a reason I prefer these "simple boards". My preferred setup
typically uses six 12566 boards per system. I find myself changing their
configuration a lot. It's been a while, but I seem to recall I had to
generally change the jumper settings any time I wanted to run diags on them
too. The non-microcircuit badged 12566 boards (GRD TRU +/-) are all soldered
jumpers, some of them 3 way posts with multiple jumpers. The microcircuit
badged 12566 boards are generally the later revision that uses jumper plugs.
MUCH easier to work with if you're changing jumpers a lot. I think the later
revisions also offer some additional functionality that the older ones
don't. Something about a "party line" seems to be lurking in foggy memory...
>> 12) Don't recognize the board in slot 23.
> Same as in slot 13.
Doh! I should have noticed that. The led & plugs on the left are a dead
giveaway. But since that board requires DMA.... and there's nothing in slot
>> On the plus side, it IS an F series... the FP unit is auctioned
> Well, it isn't an F series. An F series consists of the proper firmware
> ROMs (SIS, VIS, FFP, FPP) and the external FP processor, but everything's
> missing. You could plug in the firmware from an E series, and then it's a
That's not necessarily correct, the machine on ebay may WELL be an F series,
and likely is. See that shielded ribbon connector on the back left? That's
connecting the cpu to the FAB board underneath (as well as a dangling end
for what was probably a FEM board in slot 10). So I bet ya a lunch that the
F firmware is whats on the FAB underneath.
Again, Im not an expert on the F series. But the 2111F doesn't have an
external FP processor does it? Just the 2117F does? Both are certainly F
> My machine here also has the RTE6 and SIGNAL/1000 firmware ROMs.
I believe I have those... I think I just saw the DS1000 roms a few days ago
on my workbench. Ya know, there's a problem with just using a FEM board. You
don't have the sockets for the smaller proms there. Only on the FAB. Ah,
that's why I wanted to find blanks for the larger proms - so I could migrate
the IOP firmware to the FEM. WCS would be more fun....
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