I'll use only our decap project as source. I don't want to use any other one's.
Search found 745 matches
- Tue Sep 05, 2023 6:40 am
- Forum: Hardware
- Topic: FPGA version
- Replies: 26
- Views: 73831
- Wed Aug 23, 2023 5:29 pm
- Forum: Hardware
- Topic: FPGA version
- Replies: 26
- Views: 73831
Re: FPGA version
Ok, our team almost done reverse engineering MD ASICs with it's decap. Some of team members was made a hardware level emulator and even FPGA one. Now my turn to finish this project. Finally I done with this: https://i.ibb.co.com/TYJFQ2P/IMG-1526.jpg This is Megadrive that rebuild on custom PCB with ...
- Mon Aug 07, 2023 3:32 pm
- Forum: Announcement
- Topic: Nuked MD - decap-based cycle-accurate Mega Drive emulator (software & FPGA)
- Replies: 8
- Views: 74944
- Wed Jun 21, 2023 4:26 pm
- Forum: Sound
- Topic: New Documentation: An authoritative reference on the YM2612
- Replies: 865
- Views: 2353210
Re: New Documentation: An authoritative reference on the YM2612
As I already said here we opened the MD decapping project. One of it branch is was YM2612/YM3438 FM chip. Now the new dedicated to FM chip project is started and almost die perfect verilog model is available here . Testbench: https://github.com/nukeykt/Nuked-OPN2-FPGA/raw/main/imgstore/testbench.jpg...
- Fri Apr 28, 2023 9:35 am
- Forum: Megadrive/Genesis
- Topic: M68K Bus Control and Vdp
- Replies: 26
- Views: 48786
Re: M68K Bus Control and Vdp
Okay. The decapping really confirmed the fact that the ZA[0] pin of arbiter 315-5364 is indeed a /UDS signal synchronized with the VCLK signal.
- Mon Apr 17, 2023 5:33 pm
- Forum: Hardware
- Topic: Decapping more Genesis chips
- Replies: 17
- Views: 74339
Re: Decapping more Genesis chips
Okay. We open the GIT repository about SEGA chips for everyone. The link is: https://github.com/emu-russia/SEGAChips
Now you can help to the project if you want to. Or just use our datasets in yours projects. Welcome.
Now you can help to the project if you want to. Or just use our datasets in yours projects. Welcome.
- Fri Nov 18, 2022 6:41 am
- Forum: Megadrive/Genesis
- Topic: 10 MB Flat cart using discrete logic
- Replies: 13
- Views: 34749
Re: 10 MB Flat cart using discrete logic
You done it wrong. /ASEL is /CS for whole 8MB region. I'll just leave it here. https://i.ibb.co/YhqNCb8/SEGAMAP.png Also your 2NAND logic with /ASEL and /CE0 can burn your console because there must be 2OR logic. So, if you disconnect /CE0 and connect 13 pin to 12 you'll get the right result. Yes, /...
- Thu Nov 17, 2022 5:05 pm
- Forum: Megadrive/Genesis
- Topic: 10 MB Flat cart using discrete logic
- Replies: 13
- Views: 34749
Re: 10 MB Flat cart using discrete logic
/AS didn't asserted when DMA does access. So yes, using /ASEL is a good idea.
- Sat Mar 05, 2022 5:58 am
- Forum: Hardware
- Topic: Decapping more Genesis chips
- Replies: 17
- Views: 74339
Re: Decapping more Genesis chips
Hello again. Despite all the horror that is happening in the world, we continue the decapping project of Sega Megadrive/Genesis chips. Today I'll show you some quick previews at 10x magnifying level. 315-5364 https://i.imgur.com/3fUK6nn.jpeg TA-04 https://i.imgur.com/WMumyad.jpg 315-5309 https://i.i...
- Mon Dec 27, 2021 2:42 pm
- Forum: Megadrive/Genesis
- Topic: Cart Design Questions
- Replies: 70
- Views: 150652
Re: Cart Design Questions
Maybe you just out of the timing for SDRAM refresh?
- Sat Dec 25, 2021 10:43 am
- Forum: Megadrive/Genesis
- Topic: Cart Design Questions
- Replies: 70
- Views: 150652
Re: Cart Design Questions
You should use "~" (tilde) to inversion, not exclamation sign. Because "~" is fo bitwise negation (inversion) and "!" is for logical not.
Oh. You are confused between logical and bitwise operators (&& and & for example). Combinatorial logic uses bitwise only.
Oh. You are confused between logical and bitwise operators (&& and & for example). Combinatorial logic uses bitwise only.
- Wed Aug 25, 2021 10:56 am
- Forum: Megadrive/Genesis
- Topic: ( ) around absolute short addressing mode
- Replies: 8
- Views: 24126
Re: ( ) around absolute short addressing mode
Everyone should stick with official docs, specifically M68000 Family Programmer's Reference Manual. At the page 2-20 (61 in the PDF) there summary table of all available addressing modes.
![Image](https://i.ibb.co/C5tfxdj/image.png)
![Image](https://i.ibb.co/C5tfxdj/image.png)
- Mon Jan 06, 2020 12:50 pm
- Forum: Hardware
- Topic: Cartridge slot questions
- Replies: 23
- Views: 65738
Re: Cartridge slot questions
I suppose it would be nice to know what range the 32X outputs on the audio lines (though I heard reports that the 32X's output may be a bit too loud). It is the one piece of official hardware that makes use of it. Also the cartridges with YM2413 seem to use its output directly (?) so maybe looking ...
- Mon Jan 06, 2020 4:55 am
- Forum: Hardware
- Topic: Cartridge slot questions
- Replies: 23
- Views: 65738
Re: Cartridge slot questions
That still doesn't tell me what voltage range you should use to keep the audio signal in a "reasonable" range (I'm not a Mega Drive circuit expert :v), only that it's mixed as-is with the rest of the audio (my initial guess would be that the ideal range would be ±1V but honestly I could be wildly w...