X68000 Monitor continuous vertical scrolling on MSX RGB

[gatsu25]

I finally got a beautiful clear RGB picture out of my MSX on my X68000 monitor. The problem is, I can't get the picture to stop scrolling. The video here I took shows about the slowest rate I can get it to scroll at. Messing with any of the controls on the outside of the monitor does nothing to help. I don't have this problem on Composite input, TV, or my X68000 XVI either. Does anyone have any idea on what the culprit could be? Is it a matter of adjusting some pots on the inside of the monitor itself?

I am using a cable that takes the 15 pin input on the monitor and converts it to a 21 pin RGB female. Unfortunately I have no other machines here other than my MSX, so I'm not sure this would be happening on another system using the RGB 21 Pin input.

I have to get this working! After seeing the RGB picture, there is no way I can play using composite... Any help would be greatly appreciated!

[Fudoh]

My uneducated guess would be that the monitor needs RGBHV while the MSX does only output RGBs with composite sync in RGB mode. This would mean you need a sync processor/converter. Or do other RGBs sources work on this particular monitor ?

[gatsu25]

I have no other consoles to test personally on my monitor, but I have read about lots of different systems that will run on this monitor. Super Famicom, Playstation, Saturn, Neo Geo, anything really.

The MSX only outputs a composite sync, but the cable I have that connects the 15 pin input from the X68000 monitor and gives me a female RGB 21 Pin lead has a LM1881 Sync Splitter inside of it. I'm assuming this is what you mean by the sync processor/converter, so I don't think this is the problem, but I'm not 100% sure this isn't the cause either.

[Fudoh]

From the pinout (the monitor uses the same pinout as the output on the X68k, right ?), I'd say you need a sync connection to pins 14 and 15. Usually LM1881 pin 1 to pin 14 and LM1881 pin 3 to pin 15. Note though that the LM1881 basically outputs C-Sync and V-Sync, no clean H-Sync signal.

[gatsu25]

This cable that I purchased was specifically for the X68000 monitor to run RGB sources on it.

Here is the page for the auction and showing other sources running on the monitor.

http://page.auctions.yahoo.co.jp/jp/auction/182251077

Are you suggesting that it might need two seperate LM1881 IC chips in it?

[SuperDeadite]

That auction flat-out says "won't work for all computers" and the compatibility list does not include MSX. An XRGB in the middle will probably work though. An old XRGB-1 sells for almost nothing on yahoo, and you'd be using it in 15khz output mode, so you don't need any of the fancy features.

[gatsu25]

Alright, I thought it might, and MSX isn't as common as other systems, so I thought it might be omitted because of that. Is the XRGB-1 recommended only because of the price? Would any XRGB model probably work for this? I have thought about getting myself a Frame Meister in the past.

[SuperDeadite]

Well what are you trying to do here? Frame Meister outputs in HDMI so useless for an X68000 monitor. For connecting to an X68000 monitor, the XRGB-1, 2, and Selecty 21 are the simplest because they have D-SUB15 outputs, so you don't need to use an HDSUB-15 ("VGA plug") adapter.

The XRGB-1 and Selecty 21 are super simple, so they work great as a linking device. The XRGB-1 is a lot easier to find and cheaper too. Though I've heard Micomsoft is going to do yet another batch of Selecty21 soon as the demand is still there.

[alamone]

XRGB-1 or 2 will work. 2-Plus does not have a 15KHz mode. Not sure about the 3. Framemeister is for HDMI as mentioned.
XRGB-1 is the cheapest and easiest way to go probably. You could also try a XSYNC-1 if you have one lying around but I wouldn't
purchase one if you don't have one already, you can probably get a XRGB-1 for dirt cheap on YAJ.

[SuperDeadite]

XRGB-1 or 2 will work. 2-Plus does not have a 15KHz mode. Not sure about the 3. Framemeister is for HDMI as mentioned.
XRGB-1 is the cheapest and easiest way to go probably. You could also try a XSYNC-1 if you have one lying around but I wouldn't
purchase one if you don't have one already, you can probably get a XRGB-1 for dirt cheap on YAJ.

2plus and 3 also have 15khz output. On the 2plus you have to enter a secret button code though and is very annoying, so not recommended.

[gatsu25]

Well what are you trying to do here? Frame Meister outputs in HDMI so useless for an X68000 monitor. For connecting to an X68000 monitor, the XRGB-1, 2, and Selecty 21 are the simplest because they have D-SUB15 outputs, so you don't need to use an HDSUB-15 ("VGA plug") adapter.

The XRGB-1 and Selecty 21 are super simple, so they work great as a linking device. The XRGB-1 is a lot easier to find and cheaper too. Though I've heard Micomsoft is going to do yet another batch of Selecty21 soon as the demand is still there.

I am trying to play my consoles in RGB using the X68000 monitor as the display. In particular I want to get my MSX up and running on it. I actually knew that about the HDMI only output on the Frame Meister, I wasn't thinking when I posted that this morning!

1. It seems like the XRGB-1, 2, 3, or the Selecty 21 would all accomplish this?

2. The output for the D-SUB15 would definately work on the X68000 monitor? I recall that the NEC series of computers had a different pinout from the X68000 monitors?

Plan B would just be to break down, buy the Frame Meister and just play these systems on my HDTV.

[SuperDeadite]

Well what are you trying to do here? Frame Meister outputs in HDMI so useless for an X68000 monitor. For connecting to an X68000 monitor, the XRGB-1, 2, and Selecty 21 are the simplest because they have D-SUB15 outputs, so you don't need to use an HDSUB-15 ("VGA plug") adapter.

The XRGB-1 and Selecty 21 are super simple, so they work great as a linking device. The XRGB-1 is a lot easier to find and cheaper too. Though I've heard Micomsoft is going to do yet another batch of Selecty21 soon as the demand is still there.

I am trying to play my consoles in RGB using the X68000 monitor as the display. In particular I want to get my MSX up and running on it. I actually knew that about the HDMI only output on the Frame Meister, I wasn't thinking when I posted that this morning!

1. It seems like the XRGB-1, 2, 3, or the Selecty 21 would all accomplish this?

2. The output for the D-SUB15 would definately work on the X68000 monitor? I recall that the NEC series of computers had a different pinout from the X68000 monitors?

Plan B would just be to break down, buy the Frame Meister and just play these systems on my HDTV.

NEC/Sharp pinout is interchangeable. FM Towns is the one you have to be careful of. The Micomsoft are NEC/Sharp pinout unless otherwise marked. (XRGB-1 and Selecty 21 have a dipswitch for proper Towns output). While I can't be 100% certain, as I don't even know what MSX you're using, but my XRGB-1 works fine with my Turbo-R.

Another option if you have the space is to get a Sony Wega TV. They sell for nothing, and the majority of them have AV-Multi sockets, you can easily get a JP21->AV-Multi adapter. I have one of the HD-CRT Trinitrons and it takes my Turbo-R's RGB perfectly fine. Though the HD models lose the scanlines, so the standard SD Wega will look nicer.

[gatsu25]

NEC/Sharp pinout is interchangeable. FM Towns is the one you have to be careful of. The Micomsoft are NEC/Sharp pinout unless otherwise marked. (XRGB-1 and Selecty 21 have a dipswitch for proper Towns output). While I can't be 100% certain, as I don't even know what MSX you're using, but my XRGB-1 works fine with my Turbo-R.

Thanks again for the info. I'm using a Panasonic A1-WSX so I would assume that's about as close to the Turbo-R as you can get without being the Turbo-R. I guess I'll look out for an XRGB-1 or 2 then.