Pooyan diagnostics

[shoestring]

Hi all.

I've developed a diagnostic rom for Pooyan but haven't tested this on real hardware yet. Feel free to give it a try and let me know if there are any issues.

The diagnostic rom installs in socket 4a.

Holding down player two start whilst powering on will get you into the diagnostic mode.

diag.zip

 

[DanP]

Very nice, could this be adapted easily for other z80 games?

 

[shoestring]

There's no reason why it can't be. I've ported the code to 6809 based hardware so that shouldn't be a problem.

 

[Robert]

Thanks, this works nicely. Lots of extra menus too.

 

[shoestring]

This is still largely untested on real hardware.

Were their any issues with any of the items ( gfx / sprites ) in the diagnostic mode ?

 

[Supergun]

I’m bumping this old thread to give thanks to shoestring for this Pooyan Diagnostic rom and also to see if I might possibly get some help or tips with using it.

So I have a Pooyan PCB which only displays garbage on power up. I was told it might be the RAM. And I myself suspect it might be the z80 CPU. I also swapped out the top & bottom boards with another known working board set and the top board works 100%. So I have narrowed the problem down to the bottom board. I then used the pooyan diagnostic rom and the board passed all of the SRAM & ROM tests with all OK on screen. So, what then could be causing the board to not boot up?

Should I change the z80 CPU chip? Or would something else be more likely the issue?
Does the pooyan diagnostic rom work as it should even if the z80 is faulty?
Any help is appreciated.
Thanks,
Billy

 

[Digimon]

I have to use the Testrom, too.

It shows the screen one, but not the additonal sprite, diagnostic and character menue.

I have no idea how to advance to the next page.

https://www.jammarcade.net/pooyan-diagnostic-rom/

Digimon2022-01-30 15:54:50