PI/Arduino Processor Emulator

porchy

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Right, i finally got around to getting some cpu boards designed.
They are going to be compatible with Paul's probe heads as i know a lot of people have these already and it saves me sourcing the parts.
They will be configurable with mark 1 and 2 testers via jumpers.

Once tested i will give the pcbs away and you source your own parts and assemble.
I notice on the ones currently available there are terminals so tou can power a probe or something, is this something people will want or shall i not bother? Its no problem either way i guess but feedback is always good.

Paul, ill be in touch with you when i feel im done just to confirm i havent done anything stupid with the design that i havent picked up on.
 
porchy

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I think the idea was you could conect a logic probe there or something but TBH its not something I would be looking at using. Also, as I have a mark 1 tester I wouldnt ever be looking at having mark 2 compatibility. I dont know any numbers of how many of these have been sold and what the ratio of mark 1 to mark 2 there is but if there is no demand for mark 2 then I would probably just drop that too.
 
Hurray Banana

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porchy said:
haha, well so far its just me, thee and Purity (sounds like a chick flick!)
Click to expand...

not a very good sounding one tho
smiley4.gif
 
porchy

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Then its settled, mark 1 only it is.
The extra 40 pin connector caused a few headaches with trace layout but ive got it sussed out now.
I need to confirm a couple of things with Mark first then ill confirm with Paul then its on to fab.
 
Hurray Banana

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porchy said:
Then its settled, mark 1 only it is.
The extra 40 pin connector caused a few headaches with trace layout but ive got it sussed out now.
I need to confirm a couple of things with Mark first then ill confirm with Paul then its on to fab.
Click to expand...

smiley32.gif
 
andrewsm

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Hey guys sorry for being absent, been tied up with work recently. Anyhow just picking up this and I meant to get back to Paul about this.

Sarj made the current boards and they are the same for Mark 1 and Mark 2. The Mark 1 adapters have the VRAM circuit on them but Mark 2 do not. Mark 2 testers are more or less the same as a Mark 1 except the ADT and VRAM stuff is built in. There are some small changes to the tester connector pins but look at the website for details. The screw terminals allow a pulser etc to powered and the power is supplied by the board under test and not the tester. The tester has a limitation on current since the 5V is from the arduino regulator so nothing major can be hooked up otherwise it will overheat.

Im starting work on 6502 stuff over the holiday period as Z80 is pretty sorted now. If anybody needs questions or help give me a shout.

Glad you guys are getting stuck into this as it lets me concentrate on improving the testers
smiley4.gif


Hope this helps.

Mark

andrewsm2016-12-19 23:19:00
 
david_orton_2000

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Hey all,

Ok, so I received my Mark2, and already playing around with it, etc.
Very quickly, being a Unix/Linux chap, I had to make some adjustments.
-so just added a few shortcuts to shutdown the Pi, and output to HDMI or LCD (via the script I saw already, which does have errors, but I will fix later).

Ok, I knew I could Xdisplay (as this has been around for decades on all Unix, yup I even used an XTerm back in the day)...
Soon, quickly fixed, just install 'xming' to the PC, you will need Putty (small bit of config to use the X11), then just launch the Tester via the Shell in Putty and it displays on the PC, simples.

BTW, for file share, *nothing* really needed to install at all on the Linux, but you need WinScp (or similar) on the PC, then just connect to the IP address of the Pi (choose SCP protocol) and you can see all the files on the Pi - easy life. :)

Last one for now, the annoying 'screen save' (goes to black on the Pi):-
sudo nano /etc/lightdm/lightdm.conf
(or use vi if you hardcore Unix people!)

Add the following lines to the [SeatDefaults] section:-
# don't sleep the screen
xserver-command=X -s 0 dpms

-Probably need to restart the Pi to see the new changes.

Now to get an 8080pod made out of bits i have lying around....

Really enjoying the tester, and looking forward to seeing more.

All the best,
DaveO.
 
andrewsm

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Hey guys.

Quick heads up to say new software is now on website but again I can send direct as well. This is for arduino and tester so worth doing.

Also started work on a 6502 pod so keep you posted on this but so far looking good.

Come January I should be also starting work on the full Z80 emulator running a slave Z80.

Keep using your testers guys and post any fixes etc as feedback is always nice.
smiley1.gif
 
andrewsm

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Looks good Jon.

The fix Jon mentioned is a improvement to allow Z80B support. The current vram works to 4MHz. The new mod has been tested at 6.067Mhz so boards like Arkanoid can now be tested.
 
andrewsm

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Hi. 6502 and hopefully 2A03/07 support now working so will sketch out wiring for pod and post details here and on website soon.

Prob start work soon on 8085 or maybe 6809. Decisions lol
 
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