One option is to make the Phoenix Shifter core do this. I'll see if I can modify it to replicate your circuit @sporniket. Unfortunately I am not able to test as all my Atari stuff is in storage still. Yeah. As mentioned earlier, this is very straightforward. Increase the number of bits in r, g, and...

I would be more than happy to re-purpose my 'Shifter Killer' routines from the TT. Any relevant data gleaned there can be fed back to the HDMI Shifter project for compatibility purposes (if that's a needed thing?) Yes please, that is definitely needed. What we need for test cases is a short sequenc...

If anyone wants to see more colours on the HDMI mod, we can easily bump it up to 8bpp (which is the native HDMI colour depth).

Forgive me, as I'm not a HW guy, but wouldn't what you just explained then create a physical 18-bit palette? Yes. If it wasn't for the fact that the palette writes are only 16 bits wide they could have made the mod support 18-bit colour. Actually they could have gone up to 5-6-5 format with no extr...

Darklord wrote: ↑Wed Dec 08, 2021 4:39 am This is the same concept as the John Russell Industries 4096 color
upgrade, right? JRI 4096C board.

I assume so. I've never seen any info about how it works.

Wait, what? I don't understand? So any accelerated Atari fails with the HDMI mod? So it's useless with anyone with an AdSpeed, Turboxx board, Pak 68/3, etc installed? ...sorry, my bad, Let me rephrase that: nobody's ever got the HDMI mod to work at double speed on a 16-MHz machine. If the mod ran a...

I have an incomplete understanding also, but my interpretation of how it would have worked is that during writes to the palette registers, the second shifter would receive the data bus lines transposed like this: D14 -> D8 (red bit 5 -> shifter 2's red bit 1) D13 -> D4 (green bit 5 -> shifter 2's gr...

Once we get the board working 100% we can possibly look at additions such as the STE palette ... The STE palette has always been supported actually. Also, it's a bit of a technicality but there's a 256-colour mode as well, but the pixel clock is halved. So it's practically useless since nobody's ev...

from addr_34fc on, there are lots of ".short" statements, but that is just normal code, no data. Lots of your routines from the BIOS don't even have proper names yet. That's just how far I've gone so far, as I mentioned only 13% of the ROM is disassembled. Re: the desktop, it's less inter...

I think you are aware of the source i reconstructed for TOS 2.x? After i finished it, i also started on doing the same for TOS 1.04, and you can already find some work on it in that archive. However, it is far from being finished. I wasn't aware of it, I haven't really been in the loop on that sort...