SpritesMind.Net

One big problem about emulating 24Cxx: there are three modes that the chips use, and almost no way to tell #2 and #3 apart from the 68000 view. 24Cxx most definitely can not be "emulated all the same way". you are right, I only want to say that I was actually emulating 24C02+ (ie everything not 24C...

During my testing, I listed those games which seems to use a serial EEPROM for backup: X24C01 (128 bytes): Wonder Boy in Monster World Megaman - The Wily Wars X24Cxx (can be emulated all the same way) NBA Jam serie NFL Quarterback Club Frank Thomas Big Hurt Baseball College Slam Blockbuster World Vi...

Thank you for all these precisions, this works perfectly :D For information, the two Pete Sampras' titles use 0x3FFFFE and the others (Mircomachines series & Super Skidmark) use 0x38FFFE... I have a question regarding external devices (SRAM, EEPROM, adapter,...) that can be mounted in cartridges. If...

:? those kind of schematics does not seem to be available online btw, opening a j-cart seems not possible without breaking anything I made some disassembling using IDA and Pete Sampras' rom: here is one of the routines that (I think) is used to detect/initialize the gamepads: sub_63E: ; CODE XREF: m...

I have now partial Menacer support (enough to play the crappy 6-in-1 game, which seems to be the only lightgun game that does not also support gamepads) and complete 4-WayPlay/Teamplay support... thanks again for the links you gave me I am now looking into J-Cart support... I imagine that the additi...

These are only patent schematics but it helped me a lot to understand how Menacer works internally (relation between triggers and IO inputs, TH delay,...)

http://v3.espacenet.com/textdraw?DB=EPO ... =US5351969

Thanks a lot for these precisions... and for the patent number ;) Because i'm limited to emulate the lightgun with the analog stick, I will only need this feature in the Menacer 6-in-1 game, since other "lightgun" games are also playable using D-Pad (which is already controlled by the analog stick ;...

I was wrong about the Menacer game, it did read the DATA2 register and i've been able to simualte lightgun by triggering a level2 interrupt and mapping the Fire Button to D1 (0x02 mask). START button (pause) is mapped to D3 input (0x08 mask) I'm still having problem to understand how the TeamPlayer ...

If I'm not mistaken, the INT is generated by the VDP when detecting a high to low transition on the TH input ... and this is only done if level 2 interrupt has been enabled by the software. In complement (or alternatively), the VDP can also freeze the Hcounter if the software previously configured V...

I also found some infos about the EA 4-Way Play in this "hidden" link: http://cgfm2.emuviews.com/txt/io.htm apparently, the first Sega Tap was not compatible with EA multiplayer games so they made the Sega Team Player which could be configured to be compatible with EA games (EXTRA mode) or with othe...

Thank you, I would never have the idea to look in saturn's documentation
I finally found it in the SMPC user manual, referred as Sega TAP 3-line handshake protocol

Hi folks, again, I'm looking for some informations to improve the compatibility of the NGC Genesis PLus port and it looks like this forum is the only one around that is still really active for Megadrive technical stuff :) Actually, I have some questions about special peripherals such as the Sega Men...

yes, it's what I noticed... it's very difficult to find correct timings which work for every games considering latencies, i implemented vdp access latency on vram writes, as specified in Genesis manual, and it corrected screen flickering in Chaos Engine for example, but for others timing, it's very ...

Hi Stef, yes i'm the one who bothers you last year with the GP gamecube's port , I managed to solve my previous problems and also improve overall compatibility and functionality... thanks for having made Gens open-source :wink: My last problem is with Hint occurence: if this should happen before hbl...

Hi, I'm currently working on the compatibility improvment of my Genesis Plus port and find this board, so I join your for a few questions ; I found that some games (i'm actually testing together Skitchin', Lotus 2 Recs and Legend of Galahad) are very timing sensitive, especially regarding H & V inte...