I have an HP9000/345 system with two HP-IB interfaces. However I see
that inside there are two SCSI connectors (one with termination resistors
next to a power socket for a disk drive. I also found a reference that
HP shipped 345 systems with an internal SCSI disk drive.
However, my system does not locate a SCSI controller when it boots
(note I am talking about the boot monitor, I have not managed to boot
an OS on this machine). If I remove the ribbon cable connecting the
second HP-IB controller, the machine recognizes a SCSI controller ,
but if I connect anything to one of the SCSI connectors, the system
complains that the SCSI controller registers are bad (failed test).
I believe that there is some config problem (perhaps some jumpers
need to be changed?). Anybody has any suggestions?
A few weeks ago I rescued a 6Mhz IBM AT in an unusual rack mount case
with a Plexiglass cover. I don't know how it got in that condition or
how anybody permitted it, being as it was not shielded. But I digress
.. (It is marvellous .. like the original case mod!)
It had a 5154 with it that displayed output, but the output looked as
though it was 'smearing' to the right. This made text look goofy. The
problem was more apparent in graphics modes. A different 5154 or worked
on the machine so it is definitely the monitor, not the EGA card.
I'm a monitor novice. I know these things pack a punch, so I have a
healthy respect for them. Are there any simple checks to make?
(I have the Sams guides for the 5151 and the 5153, but not the 5154 so
I'm kind of in the dark.)
The machine also came with a 5151 that doesn't work at all. I don't
even think it is getting power. For that one I can refer to the Sams guide.
As for the rest of the machine, it was fine except for the full height
hard disk. The hard disk would start spinning, but it sounded as though
it was making metal shavings - I don't think there is any hope for it,
so I replaced it with an modern IDE drive and controller. The machine
has 1152KB, EGA with daughterboard, monochrome card, IBM 5250 emulation
card, IBM token ring card, original BIOS and a single 1.2MB floppy drive.
I want to trace out the bus grant signals on my /45 to make sure there's not
a break somewhere. However, I don't see the backplane printsets on
I could start at the first unibus slot in the system backplane and check BG4
through BG7. However, I'd rather start at wherever those 4 signals actually
originate. It's pretty hard to identify visually what pins and where, so I
wanted to check the prints. Then I can check from where BG4-7 orignate to
the end of the bus and make sure I have continuity.
Can some one point me in the right direction?
Does anyone know where to find some sound files of the ASR-33 chunking
away on printing something out?
Didn't the teletypes have a bell they rang near the right margin when
printing a long line? Or was that only during input...
"The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ:
Pilgrimage: Utah's annual demoparty
I had thought lcds get damaged if theyre not allowed
to warm up after getting too cold? Dont particularly
know, but would think the freezing point of that stuph
is much less then h2o.
--- cctech-bounces at classiccmp.org
<healyzh at aracnet.com> wrote:
> At 9:33 PM +0100 2/18/06, lee at geekdot.com wrote:
> > > What is the danger related to storing CC gear
in extreme cold
> >> temperatures?
> >One thing to keep in mind is that some liquid
crystal displays will be
> >permanently damaged by freezing. Others will stop
> >turning completely opaque or completely
transparent, but will recover
> >when they warm up.
> Interesting. Any idea if this would effect the
original Game Boy's?
> I don't know what it is about them, but I had two of
them that lost
> lines on the display after they sat unused for a
year or two. At the
> same time I'm fairly certain neither would have
> | Zane H. Healy | UNIX Systems
> | healyzh at aracnet.com (primary) | OpenVMS
> | MONK::HEALYZH (DECnet) | Classic
Computer Collector |
> | Empire of the Petal Throne and Traveller Role
> | PDP-10 Emulation and Zane's Computer
> | http://www.aracnet.com/~healyzh/
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