Author Topic: SMS Game Issue (Blank Screen)  (Read 3039 times)

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Offline Smelly_Mctroll

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SMS Game Issue (Blank Screen)
« on: August 23, 2018, 05:58 AM »
I'm having a bit of an issue, possibly with the MegaEverdrive. When I load a SMS game, the audio plays, and you can 'play' it. However the screen always remains blank. I ran the diagnostics and everything returned as 'ok.' Genesis games run fine, no issues at all. I should also note that I previously had no issues playing SMS games in the same way. Does anyone have any suggestions to fix this?

Console: Genesis Model 1
Cart: MegaEverdrive X7

Posted this earlier, but in the wrong forum.

Offline lee4

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Re: SMS Game Issue (Blank Screen)
« Reply #1 on: August 23, 2018, 06:39 AM »
is your console modded?

which sms games you trying?
ED64 v2.0, 3.0 & X7 | EDMD v3 | MEGAED X7 M15 v2.01 & PRO rev B | TED v2.4 | EDN8 v1.2N | SED v2.1 | SD2SNES rev E1 & PRO rev.B | EDGB v1.1 & X7 M17 rev B | EDGBA X5 M16 rev A & Mini M19 Rev B
SNES jr | Super NT | Mega SG | Super Retro Advance | SGB v1 | PCE+SSD3

Offline Smelly_Mctroll

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Re: SMS Game Issue (Blank Screen)
« Reply #2 on: August 24, 2018, 01:43 AM »
Console isn't modded, I do have a model 2 CD attached though. This takes place with any SMS game I try.

Offline lee4

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Re: SMS Game Issue (Blank Screen)
« Reply #3 on: August 24, 2018, 02:03 AM »
try removing cd unit from genesis system

ED64 v2.0, 3.0 & X7 | EDMD v3 | MEGAED X7 M15 v2.01 & PRO rev B | TED v2.4 | EDN8 v1.2N | SED v2.1 | SD2SNES rev E1 & PRO rev.B | EDGB v1.1 & X7 M17 rev B | EDGBA X5 M16 rev A & Mini M19 Rev B
SNES jr | Super NT | Mega SG | Super Retro Advance | SGB v1 | PCE+SSD3

Offline pcfreak324

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Re: SMS Game Issue (Blank Screen)
« Reply #4 on: August 24, 2018, 12:26 PM »
SMS games can have either video modes 0-3 or 4. Only video mode 4 (the most common one used for SMS games) is supported by the Genesis' VDP.

This mostly affects compatibility with Taiwanese, Korean or SG-1000 games. The only official SMS game I know of that is incompatible with the Genesis' VDP is F-16 Fighter (also known as F-16 Fighting Falcon).

When you run games that are incompatible with the Genesis' VDP, the behaviour is as you described. You can hear and play the game but the screen remains black.

Offline Smelly_Mctroll

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Re: SMS Game Issue (Blank Screen)
« Reply #5 on: August 25, 2018, 02:00 AM »
I removed the CD unit, but that didn't change anything unfortunately. I tried a few games that are known to work (X-Men Mojo World, Phantasy Star) still to no avail.

Offline FeverDrive

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Re: SMS Game Issue (Blank Screen)
« Reply #6 on: August 26, 2018, 08:23 PM »
Have you tried on another TV?
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Offline Smelly_Mctroll

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Re: SMS Game Issue (Blank Screen)
« Reply #7 on: October 23, 2018, 01:29 AM »
I don't think the tv is the issue. The signal from the console appears to be picked up on the upscaler (ossc) but gives my both a red and green light. Maybe there is something wrong with the everdrive cart?