Re: PDP-11 RL02 disk emulation

[Mike Ross]

On Sat, Nov 12, 2016 at 5:35 PM, Scott Baker  wrote:
> Hi*
>
>>> Any chance it could be put into 'production'?
>
> *I placed an order today for 3 RL02 emulator interface boards from OshPark.
> I expect it will take 2 weeks to get the boards back from OshPark.
> I am leveraging RL02 emulator work from Reinhard Heuberger, but I am
> using a newer FPGA board than his current design (the FPGA board that
> he is currently usingis not available), so there is some porting work
> required which will also take some time.

Oh I didn't know this was on the menu. I'm in a morass of pdp-11s at
the moment; I could certainly use one of these.

Mike

http://www.corestore.org
'No greater love hath a man than he lay down his life for his brother.
Not for millions, not for glory, not for fame.
For one person, in the dark, where no one will ever know or see.'

Re: PDP-11 RL02 disk emulation

[Doug Jackson]

My 11/34 and 11/10 would be very happy to have one of these each .

Doug Jackson 

On 25 October 2016 5:28:05 am AEDT, Scott Baker  wrote:
>Hi Noel,
>
>>> Any chance it could be put into 'production'?
>Sure, if there is interest, I could make a run of boards.
>
>>> Also, what FPGA board are you using? I assume it's one that has an
>SD
>>> card socket or something, for actually storing the bits on?
>
>My project is just an interface board for an existing RL02 emulator
>project: www.pdp11gy.com  There are a multiple project revisions listed
>on
>the pdp11gy.com site that use different Altera FPGA dev boards: DE0
>Nano,
>DE0 Nano SOC, and BeMicro CV.
>
>I was planning to use a Terasic DE0 Nano dev board since these boards
>can
>be found on eBay from $50 to $100. The DE0 nano does not have an
>micro-SD
>card socket which is why there is a socket on my interface board.
>http://sierracircuitdesign.ddns.net/temp/RL02
>
>The DE0 Nano SOC, and BeMicro CV dev boards have micro-SD card sockets,
>so
>if you used one of those, then you would not need to populate the
>micro-SD
>socket on the interface board. According to the author of the
>www.pdp11gy.com RL02 project, the 40-pin headers on DE0 Nano, DE0 Nano
>SOC,
>and BeMicro CV are compatible, so you could use my interface board with
>any
>of these boards.
>
>Regards,
>Scott

-- 
Sent from my Android device with K-9 Mail. Please excuse my brevity.

Re: PDP-11 RL02 disk emulation

[Noel Chiappa]

> From: Scott Baker

> Feedback on this project is most welcome.

Any chance it could be put into 'production'? It just seems to me that
rather than having 53 people send in individual orders for boards, etc
it would be better (and also perhaps get a price break due to volume)
to do a small run. (You may not want to produce complete boards, but
even kits would be useful.)

I think an RL02 simulator is a great idea; those of us with RL0x controllers
could use this most of the time, avoiding potential damage to our old
drives/disks; I know I would buy several if they were available.

Also, what FPGA board are you using? I assume it's one that has an SD
card socket or something, for actually storing the bits on?

Noel

Re: PDP-11 RL02 disk emulation (project info links posted to list)

[jim stephens]

On 10/17/2016 2:54 AM, jim stephens wrote:



Has anyone built or had any experience with this (or any other) RL02
emulator?


This is the end status of the page.  in update 1.1B, he states that the 
board is not available, but shows the board:


http://www.pdp11gy.com/doneE.html

In update 1.1C there are some project files.  I have saved them to look 
at, but don't know if enough is there
to try to duplicate his work, or if it will result in a working drive 
emulation.


Project information

Technical information:
MFM decoder  http://www.pdp11gy.com/MFM-D.html
MFM encoder  http://www.pdp11gy.com/MFME-D.html

Project information:

The beginning  http://www.pdp11gy.com/hist2D.html
Architecture   http://www.pdp11gy.com/hist3D.html
Flow chart  http://www.pdp11gy.com/hist1D.html

perhaps someone can contact him.  I won't put his email address or name 
here for archival, but it is on

this page:

http://www.pdp11gy.com/0E.html

Looks like a nice project to help with, or pick up.
thanks
Jim

RE: PDP-11 RL02 disk emulation

[Paul Birkel]

-Original Message-
From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of jim stephens
Sent: Monday, October 17, 2016 5:54 AM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: Re: PDP-11 RL02 disk emulation

On 10/17/2016 1:03 AM, Scott Baker wrote:
> Hi,
>
> Has anyone built or had any experience with this (or any other) RL02 
> emulator?
>
> http://www.pdp11gy.com/indexE.html#file:///E:/homepage/indexE.html
>
> Thanks,
> Scott
I think that is the project that Al refers to in a posting Friday:

"There is also the German RL02 drive emulator, which seems to have stalled 
again"

http://www.classiccmp.org/pipermail/cctalk/2016-October/028417.html

It sounded like the fellow did a lot of good research, but I didn't see a 
completed state of the project.  And he had questions about the electronics 
that I didn't see clear answers posted to.

thanks
Jim

-

See this thread - Lou got one working using a DE0 Nano: 
http://www.vcfed.org/forum/showthread.php?40147-Improved-RL01-RL02-disc-simulator-available
Also: 
http://www.vcfed.org/forum/showthread.php?44728-Request-for-comment-Modifed-circuit-of-RL01-RL02-disc-emu-I-F-(mod-from-pdp11gy-com)

-

Re: PDP-11 RL02 disk emulation

[jim stephens]

On 10/17/2016 1:03 AM, Scott Baker wrote:

Hi,

Has anyone built or had any experience with this (or any other) RL02
emulator?

http://www.pdp11gy.com/indexE.html#file:///E:/homepage/indexE.html

Thanks,
Scott

I think that is the project that Al refers to in a posting Friday:

"There is also the German RL02 drive emulator, which seems to have 
stalled again"


http://www.classiccmp.org/pipermail/cctalk/2016-October/028417.html

It sounded like the fellow did a lot of good research, but I didn't see 
a completed
state of the project.  And he had questions about the electronics that I 
didn't see

clear answers posted to.

thanks
Jim