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Feature #51

open

Debug port

Added by foft over 7 years ago. Updated about 5 years ago.

Status:
New
Priority:
Normal
Assignee:
-
Start date:
06/20/2017
Due date:
% Done:

0%

Estimated time:

Description

I'm finding it hard to track down issues in some games/programs. Output debug information so I can look into the problem after the fact.

I'm thinking as a starting point something like this:
8-bit output at 4x clock:
AH,AL,D,FLAG
Where flag is: R/W,ANTIC_FETCH,ANTIC_REFRESH,NMI_N,IRQ_N

Then those with USB streaming scopes - or e.g. FX2s can capture the trace of post-analysis. We can build a validation tool vs some emulators perhaps.

Actions #1

Updated by foft over 7 years ago

I have a first cut of this building. This will be part of the v15 core.

Next I need to build the capture software to stream this into the PC. Then some post-analysis software, probably a hacked up emulator.

Actions #2

Updated by foft over 6 years ago

  • Priority changed from High to Normal
Actions #3

Updated by foft about 5 years ago

Now I have the saleae I figure I can stream this more reliably to the PC. Will have a go at this soon... Perhaps I write a protocol decoder plugin?

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