Re: compatible VGA / RGB games

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: Sorry for the previous blank post...finger hit enter and somehow it submitted. : The amount of non-VGA compatibile DC games is extremely small. Some game manufacturers didn't put the icon on the packaging (back CD cover art) and its still VGA compatible. These games usually just come up fine with VGA, some may have to do the switch trick (power on the DC w/game and switch VGA box in TV mode...wait a few seconds to where you think the SEGA logo is displaying and switch back to VGA, and the games comes up fine. : : When I play games using the VGA box in 15kHz mode, there are even fewer games that have problems. Gauntlet, which is not supposed to be VGA compatible, will work in real VGA mode using the switch trick....and will also work in 15khz mode but again you have to do the switch trick...weird). Other games like Bangi-o really aren't VGA compatible and when you do the switch trick in real VGA mode, the game is displayed in a small window in the upper left of the computer monitor. But bangi-o boots up just fine in 15kHz mode on my arcade monitor. Go figure. : Anyway, don't let the very few games (mostly older games) which aren't VGA compatible stop you from doing the 15kHz hack. : -Dave : (remove N-O-S-P-A-M. from email) : : Thanks Dave... I already looked into the Scart Hack and didn't feel like making an extra circuit. Also for connecting to my Scan Do Pro via a VGA box would be cool, although a lot of games would not be supported from what I have read. : : My main concern was the direction you took to do your VGA box hack which you answered for me just great, Thanks! One last thing as well, which I guess I will email if you don't reply here. With disabling the 31khz wire in the VGA box so it shouldn't switch VGA on, do you have any incompatibilities with any games? Or do they all play just fine. : : Thanks Again, : : Csaba : : ----------------------------------------- : : : My webpage doesn't have any info...just pics of my cab conversion I did in 1999 (http://bfn.org/~bu030/dreamcast.html). Also, I didn't go the Jamma route, I bypassed all that and interfaced the monitor and control panel directly. There is another website that has some info for a jamma connection using a SCART cable (http://www.mameworld.net/pc2jamma/arc_dc4.html). : : : My VGA hack is this: buy the Blaze DC Adapter (http://www.ebgames.com/ebx/categories/products/product.asp?pf_id=176053) trace the 31khz pin on the connector end to where it connects to the VGA adapter PCB (pin/wire 7 I believe) and cut it (or install a spsd switch). This will force the adapter to only output 15khz rgbhv. Hack a VGA cable and splice the RGBHV to your monitor inputs. Use the stereo out (with volume control to adjust line out distortion) for sound. You can find the DC AV pinout at www.gamesx.com. : : : This may also work for Jamma if you connect both H/V syncs to the composite sync input of the jamma connector (but don't quote me on it). : : : I guess an alternate solution would be for you to just use the VGA adapter normally and connect to your Scan Do converter. : : : The DC2Jamma page mentioned above has info for hacking the controls (pretty simple). I suggest hacking the Madcatz pads as they are easier with solder connections points on the back of the pcb (rather than trying to solder to the button contacts). : : : -Dave : : : (remove N-O-S-P-A-M. from email)

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