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Main => Monitor/Video Forum => Topic started by: markb on October 30, 2005, 07:46:06 am

Title: Connecting a PSone LCD screen to a PC
Post by: markb on October 30, 2005, 07:46:06 am: I've bought a PSone LCD screen so I can connect it up to a portable arcade machine however I am having some trouble determining the required connections. I've been searching the boards and googling for the last 2 hours with no luck.
The PSone has a 12 pin connector of which only 9 are used on the LCD as follows:-
PSone LCD
1 Ground Yes
2 Right Audio Yes
3 Ground Yes
4 Left Audio Yes
5 S Video Y Yes
6 Pal TV No
7 S Video C No
8 Video GND Yes
9 Blue Yes
10 +5V No
11 Red Yes
12 Green Yes

Firstly is it possible to connect this to a PC using a composite out cable?
Secondly, what are the connections I would need to make?

I'm just starting to learn about this so any help would be appreciated.

Thanks
Title: Re: Connecting a PSone LCD screen to a PC
Post by: Jess-- on October 30, 2005, 08:30:58 am: you can connect composite video to a PSone screen, it goes in on the 3.5mm connector by the headphone socket, its an unusual connector with 4 connections instead of 3 (I always wire a phono socket to the board internally).

you can also mod these screens to work with VGA although a lot of people struggle to get the timings right. More details here http://starfox.ucc.asn.au/carcomp/serio_lcd.htm
Title: Re: Connecting a PSone LCD screen to a PC
Post by: markb on October 30, 2005, 08:36:53 am: Unfortunately it's not a Sony brand LCD so it does not have a composite input. Also for the VGA hack I believe it requires a +5V connection so that the PC can turn it on, and it doesn't have one of those either. It may still work as a VGA but I TV out would be preferable.
Title: Re: Connecting a PSone LCD screen to a PC
Post by: Jess-- on October 30, 2005, 08:57:06 am: what type of psone screen is it, most do have composit input somewhere.
Title: Re: Connecting a PSone LCD screen to a PC
Post by: markb on October 30, 2005, 09:12:53 am: Bigben Interactive make the screen, and I cannot find any information on it at all. The only input socket it has looks to be for headphones.

I have worked out though it gets its picture from the Psone using
S-Video Y
Red
Green
Blue

No idea how to get this signal from a PC yet.
Title: Re: Connecting a PSone LCD screen to a PC
Post by: markb on November 05, 2005, 06:56:58 am: The power supply arrived today and the screen boots up no problem on my old PS1, still no joy connecting it to a pc yet.
I've tried various combinations of wires and worked out that it requires and RGBY (or yRGB) signal to work the Y being the Luminance. I'm still hunting around to try and find out if this is possible to get from either a VGA output or TV-output.
In the meantime does anyone know if this is even possible?
Title: Re: Connecting a PSone LCD screen to a PC
Post by: markb on November 06, 2005, 05:14:48 am: I'm posting this just in case anyone else tries this at a later date and the link is useful as well so forgive me for continuing the thread.

I finally got it working this morning after finding this useful article:-

http://lagnarok.no-ip.com/index.html

I hooked it up using the following:-
VGA LCD Input
Red Red
Green Green
Blue Blue
Ground Ground
H Sync S-Video Y
V Sync S-Video Y

Using powerstrip on an old Matrox G100a I had lying around I was able after a lot of tweaking to get a reasonable picture by using the Arcade setting. Also I used Real VNC so I could play with the settings and not change over the vga plug constantly.

I would recommend though buying an official Sony screen as the resoluton on the one I have is not very good at all.
Title: Re: Connecting a PSone LCD screen to a PC
Post by: StephenH on November 06, 2005, 05:41:43 pm: Most PCs have a +5V output. In fact, the easiest place to get access to it, is an unused disk drive connector.

Also, there are some external transformers that supply 5V too.