On 2014-05-21 05:14, Cory Smelosky wrote:
If only I could use the LTC from my busted 11/23+ :(
Hmm. Hang on. The 11/23 you have (also an 11-23+ I think we now have established) have the clock device on the CPU card, unless I remember wrong.
So you all need is a clock signal on the backplane. That is available in a BA23. Comes from the power supply.
Johnny
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On 20 May 2014, at 21:43, Cory Smelosky <b4 at gewt.net> wrote:
On Tue, 20 May 2014, John Wilson wrote:
From: Cory Smelosky <b4 at gewt.net>
If the MicroPDP-11/73 front panel included an LTC I would be set to get
RSX-11M+ up with 1M of RAM TONIGHT. I don't have a dedicated clock
device. :(
Easily hacked up:
http://www.dbit.com/pub/pic/kw11l.asm
I used this (on a small piece of perfboard dangling from wires wrapped
directly into the backplane and wrapped in paper) to get RSX11M+ running
on a dual-height 11/73 with a 2 MB RAM card and a CQD-220 (with a Fuji
DynaMO), all on a four-slot dual-height backplane (in a BA11-VA) which
had the wires added for Q22. An 8-pin PIC is fine (with code updated as
needed) but 16F84s were what I had on hand (along with a homemade burner).
I PROBABLY have a PIC around here somewhere...but I don't know where and I know I DEFINTIELY don't have a crystal of that frequency. I have an arduino that I SUPPOSE could be hacked to work.
Does the bus itself need any special configuration? I DO have the front panel with an LTC from the NETCOM I can borrow for awhile (No need for it until I patch ZRQCH0. It looks to connect to the normal bit on the backplane where the front panel does. I can order the parts in the meantime if I do this)
John Wilson
D Bit
--
Cory Smelosky
http://gewt.net Personal stuff
http://gimme-sympathy.org Projects
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
On 2014-05-21 01:45, Cory Smelosky wrote:
On Wed, 21 May 2014, Johnny Billquist wrote:
...is my backplane not 22-bit?! I know very very little about it.
http://bitsavers.trailing-edge.com/pdf/clearpoint/Clearpoint_QRAM-22B_User_…
is the RAM board,
http://bitsavers.trailing-edge.com/pdf/cmd/MAN-000420-000_CQD-420_May94.pdf
is my SCSI controller.\
I tried a MicroVAX II in this backplane earlier and it...errr started to
smoke and the little display panel just said F.
Smoked the uVAX? That's a bad sign. I would otherwise have guessed
that maybe your memory card is not actually strapped to address 0 when
you look at all 22 bits?
Yeah! It smoked the VAX II! It could've been user error...but how the
hell could I plug the breakout in wrong and have it smoke?!
Starting to think the backplane mayyyyy be wonky.
I have some vague memory that the 4 high address bits initially had power on them before they were redesignated. And that would explain your smoke...
Johnny
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
From: Cory Smelosky <b4 at gewt.net>
Oh! Ground the "EVENT" line of the bus! Is that brought out through the
front panel plug? I imagine it would be...but I know little about this
backplane!
Not sure, but I agree it makes sense.
John Wilson
D Bit
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On 20 May 2014, at 23:32, John Wilson <wilson at dbit.com> wrote:
From: Cory Smelosky <b4 at gewt.net>
I PROBABLY have a PIC around here somewhere...but I don't know where and I
know I DEFINTIELY don't have a crystal of that frequency.
Then you just need a longer loop.
Ahh.
I have an
arduino that I SUPPOSE could be hacked to work.
I'm sure it could -- maybe add a 2N7000 or something as the driver since
I think it's officialy an open-collector line (although I could be wrong and
anyway since it's not shared, it probably doesn't matter much).
Mmm.
Does the bus itself need any special configuration?
I can't think what this would mean. Just ground the "event" line every
50th/60th and you're golden. The Q22 mod was surprisingly easy too (since
there were only four slots, with wire-wrap connectors). If the power supply
hadn't later done what all power supplies eventually do, I'd still be running
that box...
Oh! Ground the "EVENT" line of the bus! Is that brought out through the front panel plug? I imagine it would be...but I know little about this backplane!
I DO have the front
panel with an LTC from the NETCOM I can borrow for awhile (No need for it
until I patch ZRQCH0.
Yeah bringing it in from another box should be OK as long as everyone
agrees about ground reference.
Ah!
John Wilson
D Bit
From: Cory Smelosky <b4 at gewt.net>
I PROBABLY have a PIC around here somewhere...but I don't know where and I
know I DEFINTIELY don't have a crystal of that frequency.
Then you just need a longer loop.
I have an
arduino that I SUPPOSE could be hacked to work.
I'm sure it could -- maybe add a 2N7000 or something as the driver since
I think it's officialy an open-collector line (although I could be wrong and
anyway since it's not shared, it probably doesn't matter much).
Does the bus itself need any special configuration?
I can't think what this would mean. Just ground the "event" line every
50th/60th and you're golden. The Q22 mod was surprisingly easy too (since
there were only four slots, with wire-wrap connectors). If the power supply
hadn't later done what all power supplies eventually do, I'd still be running
that box...
I DO have the front
panel with an LTC from the NETCOM I can borrow for awhile (No need for it
until I patch ZRQCH0.
Yeah bringing it in from another box should be OK as long as everyone
agrees about ground reference.
John Wilson
D Bit
If only I could use the LTC from my busted 11/23+ :(
Sent from mobile device that advertises itself for no good reason
On 20 May 2014, at 21:43, Cory Smelosky <b4 at gewt.net> wrote:
On Tue, 20 May 2014, John Wilson wrote:
From: Cory Smelosky <b4 at gewt.net>
If the MicroPDP-11/73 front panel included an LTC I would be set to get
RSX-11M+ up with 1M of RAM TONIGHT. I don't have a dedicated clock
device. :(
Easily hacked up:
http://www.dbit.com/pub/pic/kw11l.asm
I used this (on a small piece of perfboard dangling from wires wrapped
directly into the backplane and wrapped in paper) to get RSX11M+ running
on a dual-height 11/73 with a 2 MB RAM card and a CQD-220 (with a Fuji
DynaMO), all on a four-slot dual-height backplane (in a BA11-VA) which
had the wires added for Q22. An 8-pin PIC is fine (with code updated as
needed) but 16F84s were what I had on hand (along with a homemade burner).
I PROBABLY have a PIC around here somewhere...but I don't know where and I know I DEFINTIELY don't have a crystal of that frequency. I have an arduino that I SUPPOSE could be hacked to work.
Does the bus itself need any special configuration? I DO have the front panel with an LTC from the NETCOM I can borrow for awhile (No need for it until I patch ZRQCH0. It looks to connect to the normal bit on the backplane where the front panel does. I can order the parts in the meantime if I do this)
John Wilson
D Bit
--
Cory Smelosky
http://gewt.net Personal stuff
http://gimme-sympathy.org Projects
On Tue, 20 May 2014, John Wilson wrote:
From: Cory Smelosky <b4 at gewt.net>
If the MicroPDP-11/73 front panel included an LTC I would be set to get
RSX-11M+ up with 1M of RAM TONIGHT. I don't have a dedicated clock
device. :(
Easily hacked up:
http://www.dbit.com/pub/pic/kw11l.asm
I used this (on a small piece of perfboard dangling from wires wrapped
directly into the backplane and wrapped in paper) to get RSX11M+ running
on a dual-height 11/73 with a 2 MB RAM card and a CQD-220 (with a Fuji
DynaMO), all on a four-slot dual-height backplane (in a BA11-VA) which
had the wires added for Q22. An 8-pin PIC is fine (with code updated as
needed) but 16F84s were what I had on hand (along with a homemade burner).
I PROBABLY have a PIC around here somewhere...but I don't know where and I know I DEFINTIELY don't have a crystal of that frequency. I have an arduino that I SUPPOSE could be hacked to work.
Does the bus itself need any special configuration? I DO have the front panel with an LTC from the NETCOM I can borrow for awhile (No need for it until I patch ZRQCH0. It looks to connect to the normal bit on the backplane where the front panel does. I can order the parts in the meantime if I do this)
John Wilson
D Bit
--
Cory Smelosky
http://gewt.net Personal stuff
http://gimme-sympathy.org Projects
From: Cory Smelosky <b4 at gewt.net>
If the MicroPDP-11/73 front panel included an LTC I would be set to get
RSX-11M+ up with 1M of RAM TONIGHT. I don't have a dedicated clock
device. :(
Easily hacked up:
http://www.dbit.com/pub/pic/kw11l.asm
I used this (on a small piece of perfboard dangling from wires wrapped
directly into the backplane and wrapped in paper) to get RSX11M+ running
on a dual-height 11/73 with a 2 MB RAM card and a CQD-220 (with a Fuji
DynaMO), all on a four-slot dual-height backplane (in a BA11-VA) which
had the wires added for Q22. An 8-pin PIC is fine (with code updated as
needed) but 16F84s were what I had on hand (along with a homemade burner).
John Wilson
D Bit
On Tue, 20 May 2014, Dave McGuire wrote:
I didn't know it was /that/ old! I thought it was a newer box just with
an 11/03 in it!
Seriously. Those boxes were sold as 11/03s.
Oops. Well, now I know what happens when you put a VAX in one.
To be honest...the linear supply should've given it away.
Yes.
Now...I DO need a Q22 box. That leaves me a custom-made BA23 enclosure
or a BA123.
Well, there are also 3U BA11 Qbus chassis with 22-bit backplanes. And
18-bit ones...which you can turn into 22-bit ones. ;) My first
MicroVAX-I ran in one of those, back in the 1980s.
I don't have one of those or the spare money for one. ;)
If the MicroPDP-11/73 front panel included an LTC I would be set to get RSX-11M+ up with 1M of RAM TONIGHT. I don't have a dedicated clock device. :(
Only the 8186, DLV11-J, weird floppy controller thing, SCSI controller, DZQ11, DEQNA/DELQA and a PMI memory baord. None of those have an LTC. :(
-Dave
--
Cory Smelosky
http://gewt.net Personal stuff
http://gimme-sympathy.org Projects
On 05/20/2014 08:33 PM, Cory Smelosky wrote:
Yeah! It smoked the VAX II! It could've been user error...but how
the hell could I plug the breakout in wrong and have it smoke?!
Starting to think the backplane mayyyyy be wonky.
Oh. it's just 18-bit. It has a copyright date of March 1977.
NETCOM HV-1148.
Oh, THAT box! Shit, one doesn't take an 11/03 and shove a MicroVAX in
it. Sure, it's Qbus, but there's a decade between them, man!
I didn't know it was /that/ old! I thought it was a newer box just with
an 11/03 in it!
Seriously. Those boxes were sold as 11/03s.
To be honest...the linear supply should've given it away.
Yes.
Now...I DO need a Q22 box. That leaves me a custom-made BA23 enclosure
or a BA123.
Well, there are also 3U BA11 Qbus chassis with 22-bit backplanes. And
18-bit ones...which you can turn into 22-bit ones. ;) My first
MicroVAX-I ran in one of those, back in the 1980s.
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
