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View topic - robotfindskitten port (not tested on hardware)

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  • Joined: 27 Feb 2006
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  • Location: Wellington, New Zealand
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robotfindskitten port (not tested on hardware)
Post Posted: Wed Dec 15, 2010 1:08 am
Last edited by thematrixeatsyou on Mon Jan 16, 2012 9:43 pm; edited 1 time in total
This port took less than 24 hours. Unfortunately I don't think it waits long enough for the VDP to react properly so expect a screwed up display when trying on the real thing.

http://gm.64pixels.org/stuff/robotfindskitten-sms.zip

Complete with source. If you manage to get it to run on the real thing, please let me know.

A few questions.
1. Should it wait for a vblank before blanking the display?
2. How long do I have to wait after the display is blanked before I get the nice 8-cycle timing?
3. What ports do I have to be careful of with the 29/8-cycle timing, $BF, $BE, or both?

(btw, this is my old nickname, I generally go by GreaseMonkey nowadays.)

EDIT: Link was dead, updated to my current host.
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Post Posted: Wed Dec 15, 2010 7:21 am
1. No, you can disable the screen any time you like.
2. Not sure - I'd guess pretty much immediately, but mid-frame stuff is likely to look dreadful.
3. The timing is for VRAM/CRAM accesses. Registers are fair game, but changes may not take immediate effect.
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