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Post by bjonte on Jun 13, 2019 14:25:57 GMT
A brand new small demo for VDC has been released.
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Post by willymanilly on Jun 14, 2019 1:00:17 GMT
Great to see a new demo for the VDC! I notice this is broken in Z64K. I know what the issue is and will have a fix soon.
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Post by willymanilly on Jun 14, 2019 10:39:53 GMT
I nearly have this demo supported 100%. Just need to fix some unwanted fetching of graphics on top and below the VDC101 logo. The fix was relatively simple but most my time is being spent to make sure nothing else got broken with the VDC emulation. Referring back to the VDC81 test programs and it's variants I created and posted in the 8x 1 thread has been very valuable. I got to say I'm very impressed with this demo. Well done Strobe on discovering it's possible to latch multiple times in the one frame. This has huge potential for to produce amazing VDC demos and a lot more flexible than for splitting the screen compared to just using the light pen routine I use in my VDC split program.  |
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Post by willymanilly on Jun 14, 2019 22:30:59 GMT
Finally! VDC101 is now 100% supported in Z64K. |
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Post by bjonte on Jun 15, 2019 4:42:25 GMT
That was fast!
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Post by willymanilly on Jun 15, 2019 11:38:38 GMT
I was able to do this relatively quick because there wasn't actually many updates I needed to do to Z64K's VDC model. Most of the work required to support VDC101 was done during the discussions I had with Tokra about his 8x1 modes, and from the various tests covered in the VDC raster split thread. VDC101 gave a few nice new pieces of the puzzle on the mystery of how the VDC works which pointed me in the right direction to do some minor tweaks to VDC Register 6 (Number of Visible Screen Rows) and VDC Register 28 (Character Pattern Address). I haven't tested it but in theory with the right timing, it should be possible to have more than 2 vdc-splits" with a mixture of bitmap or text on the one frame using Strobe's vdc-spilt method! Hopefully VDC101 is only a preview of what's to come and others will be inspired others to write more demos for the VDC now. |
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Post by tokra on Jun 15, 2019 14:19:02 GMT
I kinda lost track of the latest VDC-discoveries. You really should do a "Mysteries of the VDC"-ebook or paper or something like that :-) I still wish to improve the 8x1-mode so it has proper NTSC- (or PAL)-timing (50 Hz or 60 Hz).
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Post by willymanilly on Jun 15, 2019 23:39:55 GMT
I kinda lost track of the latest VDC-discoveries. You really should do a "Mysteries of the VDC"-ebook or paper or something like that :-) I still wish to improve the 8x1-mode so it has proper NTSC- (or PAL)-timing (50 Hz or 60 Hz). I think the community would definitely welcome a new and improved 8x1 mode slideshow from you. Happy to help out where I can. "Mysteries of the VDC" ebook is a great idea! Not sure when I will ever find time to properly document everything at the moment though. I still haven't even got around to creating a real manual for Z64K with all it's features yet (but I promise I will before releasing version 2.0 that I'm currently working on.  ). |
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Post by strobe on Jun 16, 2019 11:42:41 GMT
I got to say I'm very impressed with this demo. Well done Strobe on discovering it's possible to latch multiple times in the one frame. This has huge potential for to produce amazing VDC demos and a lot more flexible than for splitting the screen compared to just using the light pen routine I use in my VDC split program. You're welcome  |
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Post by nikoniko on Jun 23, 2019 16:36:52 GMT
Fantastic stuff! Is there any situation where willymanilly's light pen approach would allow for something that this wouldn't?
Are mid-line splits possible? If so, how much artifacting (if that's the right word) is there if any?
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