You have good taste in music. 2 Unlimited are fantastic.

Dungeon Master - great choice!

Mono can do 640x400, but I assume would need a new shifter to cope with moving that to 4 and 16 colours. The shifter doesn't care what the resolution is, only the colour depth. It's the MMU/Glue controlling hsync, vsync, and the number of shifter LOADs per line that decides the video frame paramete...

exxos wrote: ↑

Mon May 27, 2019 2:11 pm

I didn't mention 800 lines, only 200 and 400...

Right, I was only mentioning it because you were talking about wanting to increase the vertical density rather than the horizontal. Since 400 lines is already possible, I assumed you meant 800 lines vertical.

You can only double the horizontal or vertical rate though - and 640x800 seems just as silly as 1280x200. Although 1280x400 in mono might be alright, it'd have the same weird aspect ratio as medium rez, only with a font that isn't designed for it. If you really wanted to get an 800-line mode, it cou...

The FPGA core for the Cyclone-II can in theory go up to nearly 1GHz. For example, the HDMI generation runs at 320MHz. It's the rest of the system that I'm worried about - the pixel clock for 640x200 is 32MHz, and for mode 0 you need 4 shifter words every 16 pixels, so that's a decently fast rate.

exxos wrote: ↑

Mon May 27, 2019 10:19 am

Medium res with 16 colours . Would be cool to ultimately get 640x400x16 as well

Med res with 16 colours is just mode 0 at double speed, and 640x400x16 is mode 0 at quadruple the speed, which is pushing your luck a bit

I don't think you should go that far. The 256-colour mode is definitely working, so I'm not sure there's much other work to do, apart from hooking the clock up.

I don't have a donor machine (yet) - the chipset ICs on my ST are the QFP type. Anyway, I'm not very good at all the high-speed analogue stuff. But I can make the HDMI mod board do whatever you need! planar or chunky? It's one byte per pixel, although there's enough room in the resolution register t...

640x200x16 ;) What we need now is a shifter which can make use of the extra bandwidth ;) What needs to be done to get the HDMI mod working at 16MHz? I take it you are feeding the stock shifter with 64MHz to get it to output 32MHz to the MMU, same as Troed? I can give you a firmware file that output...