Search found 193 matches
- Fri May 19, 2023 11:12 am
- Forum: Megadrive/Genesis
- Topic: Help with dumping this mega drive 2 multicart from 90s
- Replies: 2
- Views: 22942
Re: Help with dumping this mega drive 2 multicart from 90s
I can dump it if you still need it, PM me. Note that to play it on PC it'll also need emulator support to emulate the chip Chilly mentioned.
- Thu Feb 20, 2020 1:26 pm
- Forum: Megadrive/Genesis
- Topic: Is a space character required at $104?
- Replies: 6
- Views: 23282
Re: Is a space character required at $104?
Not required, there are some unlicensed games doing exactly what you want to do, like "WISEGAME" for "Funny World & Balloon Boy". That said I'd suggest you to try to not invent new stuff and reuse protocols of other flashcarts if you can. For SD access there is already MED with it's "extended ssf" p...
- Thu Jun 13, 2019 3:48 pm
- Forum: Megadrive/Genesis
- Topic: DETECTING RedKid2500-based consoles
- Replies: 9
- Views: 25558
Re: DETECTING RedKid2500-based consoles
What's your reason for detecting emulators?
Just curious.
Just curious.
- Tue May 21, 2019 11:05 am
- Forum: Demos
- Topic: MD-NICCC - a 3D Mega Drive experience by TiTAN
- Replies: 56
- Views: 129587
Re: MD-NICCC - a 3D Mega Drive experience by TiTAN
seems only A15xxx range is used by SVP outside normal stuff. But it could just be the DMA latency issue I just read about from your docs. 32X does alter timings of the bus accesses, reducing headroom a bit. I think it's just the A15xxx range. Running a !DTACK wire from 32X's cartridge slot to it's ...
- Mon May 20, 2019 2:16 pm
- Forum: Demos
- Topic: MD-NICCC - a 3D Mega Drive experience by TiTAN
- Replies: 56
- Views: 129587
Re: MD-NICCC - a 3D Mega Drive experience by TiTAN
Not by SVP AFAIK.TmEE co.(TM) wrote: ↑Sat May 18, 2019 7:39 pm800000...9FFFFF. This area is used by 32X and SVP for example.
- Thu May 02, 2019 12:58 pm
- Forum: Mega/SegaCD
- Topic: Questions on writing a new Mega CD emulator
- Replies: 117
- Views: 10958246
Re: Questions on writing a new Mega CD emulator
The big mystery to me is, how do regular CPU reads and writes work? They wait for !DTACK to be asserted by gate-array (which presumably takes RAM access time in account) but probably VDP does not (hence why you can still access illegal areas with DMA without locking VDP). Isn't /DTACK driven for th...
- Fri Apr 26, 2019 10:51 am
- Forum: Mega/SegaCD
- Topic: Questions on writing a new Mega CD emulator
- Replies: 117
- Views: 10958246
Re: Questions on writing a new Mega CD emulator
I won't lie, the code is very hard to read. As is Picodrive. And it's made much worse by aiming to be so performant. Hey at least I've done C fallbacks for all the ARM asm code. It's also wrong, you'll inherit bugs if you follow it. That said I don't have any better suggestions for you, and I can't...
- Sat Apr 06, 2019 9:10 pm
- Forum: Demos
- Topic: Tänzer, a "ninja" game (Dev Diary thread)
- Replies: 290
- Views: 463693
Re: Tänzer, a "ninja" game (Dev Diary thread)
... but the problems also happen in 50Hz mode and with addons detached.
- Fri Apr 05, 2019 10:29 am
- Forum: Demos
- Topic: Tänzer, a "ninja" game (Dev Diary thread)
- Replies: 290
- Views: 463693
Re: Tänzer, a "ninja" game (Dev Diary thread)
Tried adding busreq wait loop before the DMA (right now it lacks one, just writes and forgets) - still broken, but slightly differently I think. What you mean by different ? It's true that i don't wait for BUS to be taken because normally the operation is fast (require 2 or 3 68000 at max) and the ...
- Thu Apr 04, 2019 10:54 pm
- Forum: Demos
- Topic: Tänzer, a "ninja" game (Dev Diary thread)
- Replies: 290
- Views: 463693
Re: Tänzer, a "ninja" game (Dev Diary thread)
So I was sent a build with HALT_Z80_ON_IO and it corrupts and hangs at the usual corruption spot. I'm really curious what's going on and tried some ROM hacking. I've noticed that to start DMA, SGDK writes to reg23, reg21 and then the control word. Almost everything else writes to r23 as the last reg...
- Thu Apr 04, 2019 3:34 pm
- Forum: Demos
- Topic: Tänzer, a "ninja" game (Dev Diary thread)
- Replies: 290
- Views: 463693
- Mon Apr 01, 2019 10:43 pm
- Forum: Demos
- Topic: Tänzer, a "ninja" game (Dev Diary thread)
- Replies: 290
- Views: 463693
Re: Tänzer, a "ninja" game (Dev Diary thread)
Is there any chance that you could try without the addons? Disconnected the addons, now instead of the glitches from the video it consistently hangs at the same place instead. Would be nice to know if that could be the issue or if it's a faulty cart. Dump's md5sum 3a6effb7eb7e17a84957b7c2ba6c61ca, ...
- Sun Mar 31, 2019 8:40 pm
- Forum: Demos
- Topic: Tänzer, a "ninja" game (Dev Diary thread)
- Replies: 290
- Views: 463693
Re: Tänzer, a "ninja" game (Dev Diary thread)
Also received mine, really nice. However I guess that is not supposed to be happening: https://youtu.be/OZMgaJdNICs seems to be reproducing 100% here. I'm running it on my MD1+MegaCD2+32X setup, MD1 is PAL VA6 modded with region/60Hz switches set to 60Hz mode. Also the demo loop seems to crash in ~5...
- Wed Feb 20, 2019 6:51 pm
- Forum: SGDK
- Topic: General questions
- Replies: 9
- Views: 20356
Re: General questions
A bit off topic: just curious, why do you keep calling the planes/layers "plan"? I believe the official (an unofficial) docs call them (in singular) "plane" or "playfield", or sometimes just "scroll A", but never "plan".
- Mon Feb 04, 2019 6:20 pm
- Forum: Collaboration
- Topic: dragonbox.de cartridge production service
- Replies: 6
- Views: 28261
Re: dragonbox.de cartridge production service
The custom cart is now available here:
https://www.dragonbox.de/en/195-homebrew-production
I've updated the first post too.
https://www.dragonbox.de/en/195-homebrew-production
I've updated the first post too.