Search found 867 matches

by Sik
Sat Aug 17, 2019 1:58 am
Forum: Controls
Topic: Mega Mouse with wheel
Replies: 6
Views: 615

Re: Mega Mouse with wheel

DO NOT TRY IT , you may end up burning something, the pin assignment isn't the same. To make that work you'd need custom firmware (since there doesn't seem to be any Mega Drive firmware available) and even then you need to be able to change which pins get VCC and GND (no idea if that adapter can ch...
by Sik
Mon Aug 12, 2019 2:37 pm
Forum: Video Display Processor
Topic: Seamless dungeon crawler effect
Replies: 11
Views: 382

Re: Seamless dungeon crawler effect

I think that by "seamless" he was just referring to the transitions between positions (a lot of dungeon crawlers just teleport you to the new position and it becomes horribly confusing as a lot of the time it looks like you didn't move), no need to be 100% smooth in that case. Sprites can make them ...
by Sik
Mon Aug 12, 2019 6:05 am
Forum: Video Display Processor
Topic: Seamless dungeon crawler effect
Replies: 11
Views: 382

Re: Seamless dungeon crawler effect

Even if you only consider methods, everybody tends to implement things their own way, especially on these consoles where you need to manage different video resources (the two tilemaps and sprites) and pick a trade-off that suits your particular game best (contrast with newer stuff where you get a fr...
by Sik
Sat Aug 03, 2019 11:58 am
Forum: Video Display Processor
Topic: Seamless dungeon crawler effect
Replies: 11
Views: 382

Re: Seamless dungeon crawler effect

I mean, when you see it's a few distinct graphics instead of there being obvious hints of some processing going on it becomes clear it's being assembled out of a few pre-existing graphics. I guess I jumped on it because I saw at least somebody attempt to use polygons thinking that Phantasy Star did ...
by Sik
Sat Aug 03, 2019 8:05 am
Forum: Video Display Processor
Topic: Seamless dungeon crawler effect
Replies: 11
Views: 382

Re: Seamless dungeon crawler effect

They aren't rendered on the fly, they're prerendered images (more like predrawn) that get assembled together to make the dungeon. This is a very common thing among all dungeon crawlers. The exception to the rule that comes to my mind is Shin Megami Tensei on Mega CD, that one seems to be using Wolf3...
by Sik
Mon Jul 29, 2019 3:14 am
Forum: Mega/SegaCD
Topic: Questions on writing a new Mega CD emulator
Replies: 114
Views: 9132

Re: Questions on writing a new Mega CD emulator

I forgot on which of the threads we had discussed this but whatever. I recall that we discussed that a handful of sectors from the lead-in are actually readable because they end up in the buffers — not enough to build an entire TOC, but a quirk nonetheless. Is it possible to try to peek at the buffe...
by Sik
Sun Jul 28, 2019 10:46 pm
Forum: Demos
Topic: Mega Man X
Replies: 14
Views: 7512

Re: Mega Man X

Nah it's not just you, it's barely dropping any health items. One issue I notice is that regularly the sound goes bonkers and ends up playing really loud noise (the music itself seems to continue just fine, looks like the PCM sound effects get broken). Usually it fixes itself after a few more sound ...
by Sik
Sat Jul 20, 2019 9:33 pm
Forum: Controls
Topic: Mega Mouse unused nibbles research
Replies: 30
Views: 1292

Re: Mega Mouse unused nibbles research

You missed the initial write in InitInput. Either way, I rewrote the whole thing as a state machine that changes what to do every frame and includes the reset sequence for both mouse and keyboard (・_・) (especially since the latter may actually need it if you press Reset in the middle of reading it, ...
by Sik
Sat Jul 20, 2019 1:51 pm
Forum: Controls
Topic: Mega Mouse unused nibbles research
Replies: 30
Views: 1292

Re: Mega Mouse unused nibbles research

Except my init code actually sets it to 0x40 then goes to initialize the video hardware (which does take several frames) before it ever gets to even attempt to go into the detection routine and it still fails to see the correct ID (and the code doesn't bother retrieving a peripheral ID again if it d...
by Sik
Sat Jul 20, 2019 1:42 am
Forum: Controls
Topic: Mega Mouse unused nibbles research
Replies: 30
Views: 1292

Re: Mega Mouse unused nibbles research

For the sake of keeping track of this: when retrieving the peripheral ID you must absolutely make sure to read the TH=1 bits first and the TH=0 bits later. I still want to see Body Count's code though, it's possible it's indeed doing it backwards and it somehow works with an actual mouse (but could ...
by Sik
Fri Jul 19, 2019 11:25 am
Forum: Controls
Topic: Mega Mouse unused nibbles research
Replies: 30
Views: 1292

Re: Mega Mouse unused nibbles research

Some more research related to mouse packets: Body Count is unable to detect the mouse in Fusion and I noticed that the mouse broke in Arkagis Revolution recently too, and the latter definitely doesn't care if the mouse is instantaneous or not. The only big change I did recently was changing the inpu...
by Sik
Thu Jul 18, 2019 2:57 pm
Forum: Controls
Topic: Mega Mouse unused nibbles research
Replies: 30
Views: 1292

Re: Mega Mouse unused nibbles research

It's possible it's not the MCU that's too susceptible to noisy power (though that probably isn't helping it) but the optical part. If the lights fluctuate too much I could see it causing the photosensors pick up spurious motion (and hence causing the random values). Now I also wonder if there's enou...
by Sik
Wed Jul 17, 2019 6:09 pm
Forum: Controls
Topic: Mega Mouse unused nibbles research
Replies: 30
Views: 1292

Re: Mega Mouse unused nibbles research

…that leaves me wondering what happens when you first set the latch register (does it halt where it was at that point, or does it expose what would have been the last "latched" value, i.e. acting as two separate registers over the same address?). Then again, it didn't occur to Sega to latch the HV c...
by Sik
Wed Jul 17, 2019 5:15 pm
Forum: Controls
Topic: Mega Mouse unused nibbles research
Replies: 30
Views: 1292

Re: Mega Mouse unused nibbles research

I imagine Control mode is basically "emulate a D-pad"? Especially since the Master System controller calls it Control Pad (the term Direction Pad came with the Mega Drive). (EDIT: yeah, it toggles whether it acts like a normal controller or a trackball) I have to admit i don't know too much about th...
by Sik
Tue Jul 16, 2019 11:44 pm
Forum: Controls
Topic: Mega Mouse unused nibbles research
Replies: 30
Views: 1292

Re: Mega Mouse unused nibbles research

Added Lemmings 2 to the list (spoiler: same deal as every other game that isn't Jimmy White).