Search found 2453 matches

by TmEE co.(TM)
Sat Apr 12, 2025 8:32 pm
Forum: Demos
Topic: chaekopan by limpninja (demoscene)
Replies: 1
Views: 3782

Re: chaekopan by limpninja (demoscene)

Very nice and smooth ~
I wonder if it works like one part of Overdrive2 does...
by TmEE co.(TM)
Mon Mar 10, 2025 3:50 pm
Forum: Super 32X
Topic: 32X colors
Replies: 3
Views: 5914

Re: 32X colors

There is one more thing to consider though which is RGB vs CVBS. The latter is subject to variety of errors arising in the analog tolerances during the conversion process. Phase shifts cause hue changes, especially with NTSC and luma itself is also subject to tolerances in the resistors in the chips ...
by TmEE co.(TM)
Sun Mar 09, 2025 9:57 pm
Forum: Super 32X
Topic: 32X colors
Replies: 3
Views: 5914

Re: 32X colors

I did measurements on 32X a while ago, using a test ROM ChillyWilly made, but I have had no luck locating it on this forum but it must be somewhere around here.
32Xvideo0.jpg

My measurements found that the ramps are indeed linear and that blue color is just about 1x step lower in absolute ...
by TmEE co.(TM)
Tue Feb 25, 2025 8:43 am
Forum: Super 32X
Topic: 32X and Genesis frame alignment in H32 mode
Replies: 1
Views: 2996

Re: 32X and Genesis frame alignment in H32 mode

1) The problem is that MD uses a hack to make H320 timings match those of H256 (sorry, I don't like the H32 and H40 names). The way it is done is by generating an external pixel clock (EDCLK) where some pixels are slowed down during Hsync period. It is why you set bit 7 in VDP register $0C when ...
by TmEE co.(TM)
Thu Feb 13, 2025 10:57 pm
Forum: Megadrive/Genesis
Topic: Increased Sprite Plane to a larger range than 512 (horizontal).
Replies: 4
Views: 10970

Re: Increased Sprite Plane to a larger range than 512 (horizontal).

No, this is all fixed in hardware and cannot be changed in any way.
by TmEE co.(TM)
Mon Jan 20, 2025 8:04 pm
Forum: Megadrive/Genesis
Topic: Increased Sprite Plane to a larger range than 512 (horizontal).
Replies: 4
Views: 10970

Re: Increased Sprite Plane to a larger range than 512 (horizontal).

It is not possible to extend the sprite area wider, you have to manually cull out stuff that's off screen to prevent them from becoming visible due to coordinate wraparound etc.
by TmEE co.(TM)
Thu Jan 16, 2025 3:18 pm
Forum: Announcement
Topic: Forum update this week
Replies: 8
Views: 14470

Re: Forum update this week

I was prepared to see a totally different forum, but this is a positive surprise still. It is nice things seem to have gone smoothly ~
by TmEE co.(TM)
Wed Jan 08, 2025 3:16 am
Forum: Announcement
Topic: Forum update this week
Replies: 8
Views: 14470

Re: Forum update this week

Thänk you for the heads up ~
by TmEE co.(TM)
Sun Jan 05, 2025 12:42 am
Forum: Hardware
Topic: HDD (or flash) instead of a CD, questions...
Replies: 158
Views: 276280

Re: HDD (or flash) instead of a CD, questions...

You primarly need level shifters to protect the 3.3V device from getting 5V on its pins, which will ultimately damage the 3.3V device.

If you have a point to point 3.3V output going into a 5V input that has its High level treshold below 3.3V, it will work and there's no need for any extra parts and ...
by TmEE co.(TM)
Thu Jun 13, 2024 10:32 pm
Forum: Megadrive/Genesis
Topic: Cart Design Questions
Replies: 74
Views: 216026

Re: Cart Design Questions

This is the right way to do it, there shouldn't be any problems at all.
by TmEE co.(TM)
Thu May 16, 2024 12:48 pm
Forum: Announcement
Topic: The world has changed
Replies: 6
Views: 20571

Re: The world has changed

It has definitely gone quiet over the years...

But it has certainly been a ride, I was still a teenager when I first got here, and I'm gonna be 35 in November ! It seems I joined 2006 december, in not such a long time it'll be 20 years :shock:

Much of the communications have moved to places like ...
by TmEE co.(TM)
Thu May 16, 2024 12:42 pm
Forum: Megadrive/Genesis
Topic: Script to convert RGB Images to Mega Drive "format"
Replies: 6
Views: 8763

Re: Script to convert RGB Images to Mega Drive "format"

This is impressive, even without flipping ! I imagine the forest example could benefit a lot from that.
by TmEE co.(TM)
Sat Jul 29, 2023 6:08 pm
Forum: Megadrive/Genesis
Topic: Regarding the 480i mode on Genesis. . . .
Replies: 23
Views: 286032

Re: Regarding the 480i mode on Genesis. . . .

It is seen in anything that moves horiozntally. Vertically you will get some artifacts too depending on scroll/movement speed as there will be whole lines of GFX missing every other frame and it will be seen among any kind of horizontal line patterns most particularly
by TmEE co.(TM)
Sat Jul 01, 2023 9:51 am
Forum: Video Display Processor
Topic: DMA during HBlank ...
Replies: 2
Views: 28943

Re: DMA during HBlank ...

There are no access slots in line blanking period, because VDP is busy rendering sprites which uses up all the VRAM bandwidth in that time. You can turn off rendering for the duration and get few tens of bytes worth of VRAM bandwidth but the cost is no sprites on the next line and some garbage ...
by TmEE co.(TM)
Sat Jul 01, 2023 9:43 am
Forum: Video Display Processor
Topic: Swapping in/out background/sprite tiles
Replies: 9
Views: 78908

Re: Swapping in/out background/sprite tiles

Game does its logic, which probably finishes before Active scan is finished, then it waits until it does finish and Passive scan starts and does all the VRAM etc. updates, after than it waits for Passive scan to end and Active to start and the whole process repeats. That is the basic structure of ...