QBone progress

[Joerg Hoppe]

Hi,

Time for life signs:

• QBone PCB prototypes arrived,
• QProbe (QBUS LED and Logic Analyzer interface) was designed and prototypes arrived,
• G9047 QBUS GRANT continuity and voltage monitor was designed and prototypes arrived,
• SMD soldering by JLCPCB went smooth, good quality.
  
• PDP-11/23+ build from parts as testbed
• nacked H9275 backplane setup as testbed
• Everything plugged together and cabled to the logic analyzer ... learning curve
  
• Big software fork: parallel to "UniBone" (old UNIBUS variant) a new software branch "QUniBone" supports now both the UniBone and the QBone, with lots of conditional compiles
• 4 CPLDs in QBone and QProbe are programmed. ADDR/DATA multiplexing on DAL bus lines OK.
  
• Stress test procedures for the central signal loop: BeagleBone->CPLD->DS8641->QBUS->DS8641->74LVC245 level converter->CPLDs->BeagleBone

So far everything is OK. The QBone hardware seems stable ... QProbe needs refinement.

Too bad my Chinese 3D printer died ... ordered an original Prusa MK3S, which will arrive not before end of september :-/

So enough time to dive into software ... next thing is to emulate a 4MB memory card which also supports the DATBI and DATBO block mode.

kind regards,

Joerg

And my lab is as messy as ever:

[Mark Matlock]

Joerg,

    This is fantastic progress!!!!!

    Do let me know when I can become a beta tester for both the Qbone and Qprobe. I can hardly wait!

     Good luck with the continued development and thanks for the post on your most recent work.

Best,

Mark

Sent from my iPhone

On Jul 15, 2020, at 3:00 PM, Joerg Hoppe <ioerg...@gmail.com> wrote:



<TB8A7980.jpg>

<TB8A7981.jpg>

<TB8A7985.jpg>

<TB8A7988.jpg>

--
You received this message because you are subscribed to the Google Groups "UniBone" group.
To unsubscribe from this group and stop receiving emails from it, send an email to unibone+u...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/unibone/9b50a4d2-faa3-498f-888e-59cbeab8bb87o%40googlegroups.com.

<TB8A7980.jpg>

<TB8A7981.jpg>

<TB8A7985.jpg>

<TB8A7988.jpg>

[John H. Reinhardt]

I'm probably too slow to be much good as a beta tester but whenever the time comes I'll be interested in 2 QBone kits with the SMD chips mounted if that is an option.

-- 
John H. Reinhardt
  PRRT&HS  #8909
  C&O HS  #11530
  N-Trak   #7566 



To view this discussion on the web visit https://groups.google.com/d/msgid/unibone/9FCF4594-E5F1-48DB-8134-0721ACD03561%40matlockfamily.com.

[stephenbuc...@gmail.com]

Please put me on the beta and purchase list. I'm hoping to use 2 of them for PDP-11 museum displays.

Thanks,

Steve