Commander X16

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I wonder if it's worth considering the x16 with a full FPGA implementation like the X8? Not sure what it would mean for the YM chip but perhaps there is already FPGA for that too. It would allow for complete "firmware" upgrades in the future and could simplify the overall design. Not sure if it wou...

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Thanks for the interest! It works by generating a pair of line interrupts for each visible line of tiles, then adjusting the vertical scroll position for the Tile layer accordingly based upon a sine wave pattern, i.e. the 1st line interrupt "switches on" the tile line and the 2nd "switches off" the...

<em>I did publish this link on the FB group earlier but just in case you missed it</em> A very small sneak peek at one of the effects I've coded for my upcoming X16 demo: VERA.FX 1 Inspiration came from a C64 Flexible Line Distance (FLD) routine I wrote back in the 1980s! Hopefully the full demo wi...

The PSG does lack some of the SID HW features, e.g. ADSR, Filters etc, but it can still pump out some great sounds. Something like ADSR can be achieved in SW using timing and the volume control for the voice. Take a look at the link below. It's a C64 Rob Hubbard routine with its SID values being tr...

One of my fave games from the C64 days is getting a new life on the Switch - Feb 2021:   <div class="ipsEmbeddedVideo"> <div> <iframe allowfullscreen="" frameborder="0" height="270" width="480" data-embed-src="https://www.youtube.com/embed/WOuz3lQ4GPM?feature=oembed"></iframe> </div> </div>    

Looking good. Loving your work. ?

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I think the answer to my question is NO but does anybody know if there is a way to determine the "current" raster line being rendered by VERA?

On the C64 you could simply issue a:

LDA $D012

(with the MSB being held in the $D011 register)

Thanks,

G