Search found 267 matches

by Smonson
Sun Oct 06, 2019 12:27 pm
Forum: NEWS & ANNOUNCEMENTS
Topic: MONGREL REMAKE H4 PRE-ORDER
Replies: 46
Views: 4650

Re: MONGREL REMAKE H4 PRE-ORDER

Just ordered mine from the store... I'm looking forwarding to getting involved this time around. Better late than never!
by Smonson
Thu Jul 25, 2019 4:24 am
Forum: CHAT FORUM
Topic: 2Unlimited unknown NOLIMITS MOD version
Replies: 11
Views: 784

Re: 2Unlimited unknown NOLIMITS MOD version

You have good taste in music. 2 Unlimited are fantastic.
by Smonson
Thu Jul 18, 2019 9:31 am
Forum: INTRODUCE YOURSELF
Topic: Hello
Replies: 3
Views: 1788

Re: Hello

Dungeon Master - great choice!
by Smonson
Tue May 28, 2019 6:05 am
Forum: MONGREL EDITION DEVELOPMENT & INFO
Topic: True 16MHz Mode
Replies: 111
Views: 9689

Re: True 16MHz Mode

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...
by Smonson
Mon May 27, 2019 3:02 pm
Forum: MONGREL EDITION DEVELOPMENT & INFO
Topic: True 16MHz Mode
Replies: 111
Views: 9689

Re: True 16MHz Mode

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.
by Smonson
Mon May 27, 2019 1:22 pm
Forum: MONGREL EDITION DEVELOPMENT & INFO
Topic: True 16MHz Mode
Replies: 111
Views: 9689

Re: True 16MHz Mode

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...
by Smonson
Mon May 27, 2019 12:04 pm
Forum: MONGREL EDITION DEVELOPMENT & INFO
Topic: True 16MHz Mode
Replies: 111
Views: 9689

Re: True 16MHz Mode

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.
by Smonson
Mon May 27, 2019 11:45 am
Forum: MONGREL EDITION DEVELOPMENT & INFO
Topic: True 16MHz Mode
Replies: 111
Views: 9689

Re: True 16MHz Mode

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 :lol:
by Smonson
Mon May 27, 2019 9:03 am
Forum: MONGREL EDITION DEVELOPMENT & INFO
Topic: True 16MHz Mode
Replies: 111
Views: 9689

Re: True 16MHz Mode

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.
by Smonson
Sun May 26, 2019 3:26 pm
Forum: MONGREL EDITION DEVELOPMENT & INFO
Topic: True 16MHz Mode
Replies: 111
Views: 9689

Re: True 16MHz Mode

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...

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