Search found 25 matches

by MetalliC
Sat Sep 09, 2017 10:38 pm
Forum: Mega/SegaCD
Topic: X-Eye Service Manual and Technical Manual
Replies: 3
Views: 294

Re: X-Eye Service Manual and Technical Manual

out of curiosity - does anyone has been trying to dump CDC firmware ? HD404019 MCU have "PROM mode" for programming and verification.
by MetalliC
Sat Jul 22, 2017 1:24 pm
Forum: Megadrive/Genesis
Topic: Cartridge copy protection
Replies: 9
Views: 588

Re: Cartridge copy protection

one of good more-less recent examples: NG.DEV's games for Neo-Geo platform - no bootlegs or cracked copies exists, as well as no emulation. mainly because carts have NXP's ARM-based MCU, with internal 512KB flash rom, afaik big part of game logic code there, and no known ways to dump it. other good ...
by MetalliC
Mon Apr 24, 2017 10:14 am
Forum: Video Display Processor
Topic: Titan's Mega Drive tech docs including Debug Register
Replies: 36
Views: 3140

Re: Titan's Mega Drive tech docs including Debug Register

if I get it right - forcibly enabled plane ANDed with normally final result color number. there is always color number, in your case it is border color ?
by MetalliC
Tue Jan 31, 2017 1:37 am
Forum: Megadrive/Genesis
Topic: Genesis/MD test ROMs
Replies: 10
Views: 1463

Re: Genesis/MD test ROMs

my fellow Arzeno recently found and dumped interesting looking MD cart - http://i90.fastpic.ru/thumb/2017/0131/4a/467f275729fcec036fab841cc673744a.jpeg MD Soft Checker Version 0.30 **Prg. by papi** (C)SEGA 1993.MAR link looks like a PITA for emulators - on most of it stuck at failed "Z80 RUN" test, ...
by MetalliC
Mon Jun 13, 2016 11:00 am
Forum: Megadrive/Genesis
Topic: Dump of the D-CAT16 handheld (Firecore)
Replies: 12
Views: 1799

Re: Dump of the D-CAT16 handheld (Firecore)

I wonder why they added some much RAM but well, it costs almost nothing now so why not... if its similar to Sega Gopher handheld - game ROMs loaded into it's SDRAM (IC in right bottom PCB corner I'd guess) , which is quite big and likely used/mapped as both 'cartridge ROM' and main M68K RAM (and po...
by MetalliC
Wed Jan 20, 2016 3:37 am
Forum: Controls
Topic: Joypads 3/6 Button Response Timings
Replies: 7
Views: 1520

Re: Joypads 3/6 Button Response Timings

perhaps this bit of Eke's tech info will be useful
https://github.com/ekeeke/Genesis-Plus- ... -172347221
by MetalliC
Sun Jan 17, 2016 10:31 am
Forum: Demos
Topic: Mega Marble World
Replies: 45
Views: 6772

Re: Mega Marble World

alko wrote:
HardWareMan wrote:И здесь принято по английски писать. Допускается даже гуглетранслейт.
Автор данной игры russian.
quite many people here is non native English.
imagine what the heck will going on if each of them decides to use his native language
by MetalliC
Wed Dec 16, 2015 10:51 am
Forum: Sound
Topic: New Documentation: An authoritative reference on the YM2612
Replies: 831
Views: 279519

Re: New Documentation: An authoritative reference on the YM2612

its going off topic but... you are wrong, here is a lot of old games was released recent times, mostly from DotEmu company. all of them emulated, for example Raiden Legacy in Steam and GoG is MAME-based. so I'm not surprised some people like Jarek doesn't want to see their's code and research resear...
by MetalliC
Mon Dec 14, 2015 1:52 pm
Forum: Sound
Topic: New Documentation: An authoritative reference on the YM2612
Replies: 831
Views: 279519

Re: New Documentation: An authoritative reference on the YM2612

either it's something based on the MAME core which has an explicit "no commercial use" clause currently MAME in process of relicensing, so in most parts it is BSD-3 or/and GPL already. but not in the case of FM OPL/OPN cores, its commercial usage was explicit forbidden by its author (Jarek Burczyns...
by MetalliC
Tue Dec 01, 2015 6:51 pm
Forum: Hardware
Topic: Decapping more Genesis chips
Replies: 13
Views: 3683

Re: Decapping more Genesis chips

about SCSP DSP docs - there (almost) none of it. if I not mistaken, most of info comes from Dreamcast AICA docs, there is some brief explanation what its opcode bits means and how its workflow is. but it lacks of details. mentioned Macintosh software is almost useless, its like somewhat building kit...
by MetalliC
Fri May 08, 2015 10:22 pm
Forum: Exodus
Topic: Exodus 2.0 + Open Source Release
Replies: 105
Views: 15944

as for YM2612, I think there is some error - shift here will give bad results for unsigned. imo it must be (int) (~newAttenuation * attenuationIncrement) >> 4 also I have some good idea why here was needed to handtune increment patterns for rates 2-7, and why they different from patterns for bigger ...
by MetalliC
Mon May 04, 2015 9:21 pm
Forum: Exodus
Topic: Exodus 2.0 + Open Source Release
Replies: 105
Views: 15944

Nemesis congrats with release, great work! does YM in Exodus include all latest findings ? I've heard there was researches/tests about envelopeCycleCounter, and it shows its not such simple, like decrementing starting from 4095, and reload to 4095 at 0, but I dont see this in Exodus code also I've ...
by MetalliC
Wed May 01, 2013 10:31 am
Forum: Exodus
Topic: Bug reports?
Replies: 48
Views: 12484

"Mr. Nutz - Hoppin' Mad (Proto)" aka "Mr.Nutz 2" hangs after Sega logo, both original version and patched for Everdrive.
by MetalliC
Wed May 01, 2013 10:05 am
Forum: Megadrive/Genesis
Topic: Cycle accurate Mega Drive emulation: Exodus coming in April!
Replies: 106
Views: 19745

That's probably the hyperthreading. Hyperthreading potentially gives you double the number of cores available, but in reality, those "cores" can only be used at certain times, so the hyperthreading cores will often appear "idle" when in reality, they can't be used at that time because the currently...
by MetalliC
Tue Apr 30, 2013 2:49 pm
Forum: Megadrive/Genesis
Topic: Cycle accurate Mega Drive emulation: Exodus coming in April!
Replies: 106
Views: 19745

Well done Nemesis! Its realy powerful debug tool.
But as emulator... I often see 50-55fps in Sonic 2 demo-mode, is my i5 760 (2.9Ghz 4core) too slow for fullspeed ?