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
On Tue, 20 May 2014, Dave McGuire wrote:
On 05/20/2014 08:05 PM, Cory Smelosky wrote:
On Tue, 20 May 2014, 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!
To be honest...the linear supply should've given it away.
Now...I DO need a Q22 box. That leaves me a custom-made BA23 enclosure or a BA123.
-Dave
--
Cory Smelosky
http://gewt.net Personal stuff
http://gimme-sympathy.org Projects
On 05/20/2014 08:05 PM, Cory Smelosky wrote:
On Tue, 20 May 2014, 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!
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
On Tue, 20 May 2014, 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.
Johnny
--
Cory Smelosky
http://gewt.net Personal stuff
http://gimme-sympathy.org Projects
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.
Johnny
--
Cory Smelosky
http://gewt.net Personal stuff
http://gimme-sympathy.org Projects
