>What might be fun would be an S-100 card to serve as an interface to a
>Monochrome/Hercules equivalent card and an IBM-style keyboard
Compupro did a similart thing over a decade ago ... it's called the "PC Video"
S-100 card.
>thrift store. That would save the hassle of having an extra keyboard and
>monitor for your "extra" PC.
I dunno - to me the most useful possible console interface is a serial
port. I can hook a terminal up, I can hook a VAX up, I can hook a
PC-clone up, etc.
--
Tim Shoppa Email: shoppa(a)trailing-edge.com
Trailing Edge Technology WWW: http://www.trailing-edge.com/
7328 Bradley Blvd Voice: 301-767-5917
Bethesda, MD, USA 20817 Fax: 301-767-5927
Sergey Svishchev <svs(a)ropnet.ru> wrote:
> When tape is loaded, both "1600" and "6250" are highlighted on front panel.
Looking in the 7979A/7980A/7980XC users's guide (those are other model
numbers for the HP drive), I see that means the drive thinks that a
"tape of unknown density" has been loaded. That's different than a
blank tape, for which it would leave all the density lights off.
-Frank McConnell
< The RX02 is a single Mitsubishi 1/2 height 8".
It's not an RX02 but one of the workalikes, RX02 (DEC) are control data
with DEC boards and are very full height.
< Question: Is the RLV11 appropriate and if so, which slots do they
<go in?
No, not for that box. However the backplane sounds like 18 slots of AB
bussing and not the AB/CD bussing you need). The key
is the two cards in the right hand slots.
Allison
<Hmm, if the RLV11's go into a ABCD backplane, and the BA11 is such a
<backplane (18 bit all 9 slots have CD connected) could you plug a backplan
<into the BA11 using one of those extender ables (two dual connectors on
<each end) ?
Yes but your still limted to 256k of ram (not a big problem) and you must
follow all the bus grant rules! It does work.
Allison
<both ABCD. In a BA23 box, the top 3 slots are ABCD. I presume
<that if you put the CPU in the top slot and the RLV11 in the 2nd and
<third slot, it might work. Has anyone ever done that successfully?
NO, Dont! There is a different backplane that would fit and work but the
standard (BA23) one is not usable with RLV11. Most BA11 (S or N) boxes have
the right one though.
<Also, if you are running RT-11, you can still use more than 256 KBytes
<in the system, just don't try to do it with the RLV11. PIP can
<copy anything from the RL02s to the RD53 and then let you use
<the rest of the memory over 256 KBytes.
RT11 will run in more than 256k (mine has 2mb). The RLV11 however limits
you to 256k, though you could write your one handler... nah.
<The RQDX2 allows RD51, RD52, RD53. It is a quad board (a -YB).
<Most will not accept an RD52 from an RQDX1 without re-format.
RQDX1 and 2 are the same board with different firmware. The later RQDX2
has knowledge of RD50->53 where the RQDX1 only knows the RD50->52. The
later RQDX3 (dual width rhater than quad) required the reformatted drives
as it's slightly differnt format.
Allison
< Wait... will RLV11s go in the 11/44??? That would be major cool,
<as well...
NO! RLV-11 two board set is for Qbus and it must be a Qbus with CD bussing
(Q-CD), also that controller can only DMA to 18bits (256k). The later is not
much of a problem though as a pdp11 with 256k is a fair system.
Allison
Has anyone seen or managed to get hold of a CP/M 2.2 driver for the XCOMP
STS Hard Disk Controller. I've got this controller, and have decided,
tentatively, to use it in hooking up one of my antique 8" Shugart hard
disks. It handles only one drive and that's what fits in the box,
concurrently with an 8" floppy drive.
If anyone has machine readables of this stuff, I'd really appreciate a copy.
Dick
I have a large number of PC Magazine from 1988 to 1994
and they must go.
Also, 2 * LA120 working before last stored about 2 years ago
Also a PDP-11/34 was working when I received it about 6
months ago.
Also, a few cabinets that hold the RL02 drives. I will
probably have to let go of the RL02 drives as well, but
not for about a year.
This stuff is too heavy to ship and I don't have the facility
to box it in any case. Local Pickup ONLY - Toronto.
> The backplane is third-party, not DEC, and has integral
>termination (no terminator card per se.) It has 8 quad-height slots.
>
> 1A-B M8192YB 1C-D MTI MXV22 (RX11 clone)
> 2A-B MTI MLV11M HD cont. 2C-D ?? 306 BootRoms etc.
> 3A-B M8043 quad SLU (console) 3C-D blank
> 4A-B Camintonn MLV11-J 4x SLU 4C-D blank
> 5A-B blank 5C-D blank (was Pertec VRG-Q)
> 6A-B Camintonn 256KW MOS [4164] 6C-D blank
> 7A-B blank 7C-D blank
> 8A-B blank 8C-D blank
> Question: Is the RLV11 appropriate and if so, which slots do they
>go in?
Not appropriate - you have no CD slots at all in this backplane. It
looks like it's either a serpentine or zig-zag ABAB layout.
Is this a Sigma box/backplane, by any chance? If so, it probably
has a big yellow warning sticker inside telling you that if you plug
in anything that expects to use the CD slots for its own purposes,
you'll end up letting the magic smoke out (or something to that
effect.)
Move the cards to a more conventional DEC backplane and you
can probably use the RLV11 just fine. Alternatively you could
just go out and spend the bucks for a RLV12 (they were only about
$150 a few years back.)
--
Tim Shoppa Email: shoppa(a)trailing-edge.com
Trailing Edge Technology WWW: http://www.trailing-edge.com/
7328 Bradley Blvd Voice: 301-767-5917
Bethesda, MD, USA 20817 Fax: 301-767-5927
>Yesterday four geeks (including myself) had tried to convince a HP 88780
>9-track SCSI drive (cleverly disguised as Tandem 5160) to accept 6250 bpi
>tapes. It works OK at 1600 bpi, but refuses to admit it knows about 6250:
>"mt setdensity 3" on a Linux box results in "Incompatible media installed"
>error (when the tape written at 6250 bpi is loaded.)
You shouldn't have to do the setdensity operation; the drive ought
to be able to read the 6250 BPI drive in any event. What happens
when you try to read the 6250 BPI tape?
Historically, the SCSI commands for selecting tape drive density have
been either ignored or misinterpreted by everyone throughout the years.
--
Tim Shoppa Email: shoppa(a)trailing-edge.com
Trailing Edge Technology WWW: http://www.trailing-edge.com/
7328 Bradley Blvd Voice: 301-767-5917
Bethesda, MD, USA 20817 Fax: 301-767-5927
