Search found 234 matches

by prophet36
Thu Jun 21, 2018 8:21 pm
Forum: UMDK
Topic: 2 Layer LX9 Board Design
Replies: 4
Views: 418

Re: 2 Layer LX9 Board Design

I only had the one AT25SF041 and pretty sure I binned it after hot airing it off. No worries! Meanwhile the board is with my brother ~600miles away (I built it as a birthday present). Wow! What a great brother you are! Mine are shit! :-) I think it was an oscillator problem on the Cypress chip I ad...
by prophet36
Thu Jun 21, 2018 6:55 pm
Forum: UMDK
Topic: 2 Layer LX9 Board Design
Replies: 4
Views: 418

Re: 2 Layer LX9 Board Design

Also, the problem with the Cypress chip might well be an oscillator problem. The layout for both the oscillator and the USB signals is quite sensitive, but I have got it working on a home-made two-layer board before - the thing to be sure of is that you don't route the oscillator signals or the USB ...
by prophet36
Thu Jun 21, 2018 6:46 pm
Forum: UMDK
Topic: 2 Layer LX9 Board Design
Replies: 4
Views: 418

Re: 2 Layer LX9 Board Design

Hi Dan181, great work. If you still have a board with the AT25SF041-SHD-T soldered to it, I'd be happy to work with you to get it added to the programmer code as a supported part. It should be quite easy to do, if you have actual hardware to test it on.
by prophet36
Thu Jun 21, 2018 6:43 pm
Forum: UMDK
Topic: Coming Soon(ish)... probably [Update - 15/06]
Replies: 8
Views: 1562

Re: Coming Soon(ish)... probably [Update - 15/06]

This is awesome amushrow, I'm very happy to endorse your work!
by prophet36
Tue Feb 27, 2018 7:13 pm
Forum: UMDK
Topic: How to build firmware (UMDK Menu + Monitor)?
Replies: 5
Views: 1539

Re: How to build firmware (UMDK Menu + Monitor)?

Sorry I've not been around lately. Was it just a bad connection that was causing problems? Are you all sorted now? I intended for the basic signal test to catch things like bad connections on the cart.

BTW, feel free to send me a pull-request on GitHub to implement SDHC.
by prophet36
Wed Jan 10, 2018 9:48 pm
Forum: UMDK
Topic: MD hangs after playing any PCM file
Replies: 69
Views: 8417

Re: MD hangs after playing any PCM file

Do you have Super Street Fighter II (The New Challengers)? That has some quite tight timing on the DMA. It was my go-to test ROM for timing issues.
by prophet36
Wed Jan 10, 2018 9:36 pm
Forum: UMDK
Topic: MD hangs after playing any PCM file
Replies: 69
Views: 8417

Re: MD hangs after playing any PCM file

Excellent, well done! I'll try your VHDL change on my hardware when I have a minute (which won't be for a few weeks).
by prophet36
Wed Jan 10, 2018 8:37 pm
Forum: UMDK
Topic: MD hangs after playing any PCM file
Replies: 69
Views: 8417

Re: MD hangs after playing any PCM file

Which firmware are you talking about?

Happy new year to you too!
by prophet36
Mon Aug 14, 2017 6:09 pm
Forum: UMDK
Topic: New Wiki: Building UMDK tools on Windows
Replies: 2
Views: 807

Re: New Wiki: Building UMDK tools on Windows

You're welcome. Did you try it out? Any problems?
by prophet36
Sun Jul 09, 2017 9:40 am
Forum: UMDK
Topic: New Wiki: Building UMDK tools on Windows
Replies: 2
Views: 807

New Wiki: Building UMDK tools on Windows

Several people have been asking about using UMDK on Windows, so I wrote a wiki to help people get up and running . The Windows build still needs an owner, someone who is willing to help users and bring UMDK-on-Windows up to the same usability standard as UMDK-on-Linux. The most pressing thing is to ...
by prophet36
Mon May 29, 2017 9:53 am
Forum: UMDK
Topic: MD hangs after playing any PCM file
Replies: 69
Views: 8417

Re: MD hangs after playing any PCM file

Great work!
by prophet36
Tue May 02, 2017 8:07 am
Forum: UMDK
Topic: MD hangs after playing any PCM file
Replies: 69
Views: 8417

Re: MD hangs after playing any PCM file

you can use any fpga pin for a clock OUTPUT pin, DCM'ed or not does not matter It's been a while since I looked into this, so I don't remember the details, but it's all in this thread on the Xilinx forums. I think it'd be worthwhile to try it out before you route your board. To do it properly an OD...
by prophet36
Mon May 01, 2017 10:28 pm
Forum: UMDK
Topic: MD hangs after playing any PCM file
Replies: 69
Views: 8417

Re: MD hangs after playing any PCM file

The only difference is that I'm getting rid of AS completely I think the only place /AS is used is to distinguish between CPU (i.e Z80 or 68000) cycles and DMA cycles in the trace log. I have a small project on the go to "replay" UMDK trace logs into a 68000 emulator (probably Musashi, which is use...
by prophet36
Mon May 01, 2017 4:23 pm
Forum: UMDK
Topic: MD hangs after playing any PCM file
Replies: 69
Views: 8417

Re: MD hangs after playing any PCM file

Sorry for hijack but I decided to take a more "drastic" approach That is awesome, great work! Please bear in mind the new information that amushrow's painstaking detective-work has brought to the table in this thread though: the instability seen during 68000/Z80 bus arbitration on a small number of...
by prophet36
Mon May 01, 2017 1:37 pm
Forum: UMDK
Topic: MD hangs after playing any PCM file
Replies: 69
Views: 8417

Re: MD hangs after playing any PCM file

That is very cool. You should put your name in the copyright message instead of mine though - I don't want to take the credit[1] for it!

So forgive my ignorance but how exactly do the diodes and resistors achieve the level-conversion?

[1]Or the blame!