Received the following awesome Raizing artwork, thanks to Bay!
Thursday, August 16, 2012
Wednesday, July 04, 2012
UPDATE (03/01/15) There have been a lot of breakthroughs in hacking these Gbones upscalers via Raspberry Pi and I2C connection. Details can be found on the shmups forum thread located here.
I made a very interesting discovery with the CGA2VGA scaler that came in my Red Storm cabinet. The scaler looks like the generic/OEM version we've all seen on eBay for ~$35, except even cheaper since they removed all the components except for RGB input and VGA output. But the big difference is the one that came in my cab can successfully scale PCBs of various refresh rates, like the very difficult Seibu 55hz games!
Here is a visual comparison. The Gonbes GBS-8220 in on the left, and the Red Storm generic is on the right.
|(click picture for hires pic)|
Comparing both side by side in a similar setup, the menus are exactly the same, except the red storm version allowed for a wider range of values to be set for horizontal and vertical settings. Looking closely at the both boards, the GBS-8220 has a 2011.08.16 V30 silkscreened on it, while the stickers on the red storm version looks like it's firmware was updated in February of 2012.
So I'm hoping someone can help me figure out how to dump the firmware of the red storm version and see if I can successfully upgrade the GBS-8220 firmware. I see there are two sets of 4 pin "upgrade" connectors on the right side, although it looks like some were removed. There is also a 2 pin connector directly under these which I assume may be a selectable "write" jumper?
Monday, April 09, 2012
Assault is an amazingly fun (and difficult) overhead tank arcade game that has a distinctive style all its own. The original vertical cabinet is pretty unique being noticeably thinner, with twin stick controls, making it a rare find outside of its native environment.
Overall I'm pretty happy with how this plays, but again, I'd prefer the overall vibe and feel of an original cabinet if one were to be found locally.
Sunday, April 01, 2012
I've been saving up for over a year now to get an LCD cabinet, and sold one of my Astro City's to make room in my garage. The wait paid off last week when I was able to take home a new Red Storm 32" LCD cabinet.
[Update!] Since this original posting, I received a set of low profile Power, VGA, and HDMI cables from GameCenter Arcade, which now allows me to rotate the monitor proper without having to flip the chassis on the back. So in total, rotating takes about 2 minutes (just unscrew 4 hex bolts from the back, rotate, and screw back in. This is actually faster than rotating an Egret II if you consider the time it takes to also rotate the bezel.
Posted by Arcade Fever at 10:28 AM
Saturday, March 10, 2012
Sunday, February 19, 2012
Here is a quick fix to what I believe is a common Sega Naomi video problem. I've seen this happen on two Naomi motherboards I own, as well as on a Hikaru motherboard. Video looks to be smeared or ghosting, like in the picture below.
I don't know exactly how it happens or why (I'm too lazy to really investigate at this point), but the problem is with the filter board (not the motherboard).
After removing the filter board, turn it over and you'll notice a burned trace just under one of the long connectors. This pin is one leg of an RC network that goes to the VGA port, and then runs under the connector to another set of pins above it.
The fix is simple, jumper the two connectors to bypass the burned trace, and your video will look crisp as new.
Sunday, January 08, 2012
With the new year comes resolutions, and this year I am pledging to learn how to diagnose and fix common PCB failures. Over the years I've been steadily contributing to a collection of broken PCBs, some that I think could be fixed easily, and others that I think require deeper investigation. Not having an EE background, I've had to learn much of what I know on my own, and will try doing more of that this year in troubleshooting circuits.