Homemade PSP VGA/TV adaptor

[SpectroPlasm]

Rightey Oh

back in business (I'm still PSPless atm)
but i am getting back to PSP hardware modding, and to start off i'm gonna share with all of you the infamous spectroplasmic PSP VGA/TV adaptor (tadaaaaa)

ok now first off WTf is this?

it an adaptor that will let you use your monitor or your TV for the output of the PSP

How do i know this is gonna work?
first off here are some specs of the PSP LCD screen

• the LCD uses 59.60 Hz for V-sync
• the LCD has RGB compnent signals that can be used
• the LCD has enough pinout info for such a tedious project
• the LCD has a decent TV native res that can be exploited via an LM chip
• i'm just plain crazy but i know a lot of peaple are with me too :°)
• help is welcomed

this aint no sync scanner so anybody that is gonna start flames saying we can't use our PSP lcd once this baby is hooked up can shut up.
this adaptor will be exaclty like a small jack on the PSP that you could use to hook or unhook at anytime.
ok that's the first part of it, stay tuned for the rest of my crazy idea.

[Squirrel]

It would be great if you could get this to work. Can broken PSP TFT screens be of help to you (electronics, ribbon connector)? I have some of them and if you can use them you may have them. I also have a seriously damaged motherboard (TA-081 with violently removed nandflash and some problem in the power circuit) that you can have if it is of any use (connectors?)

[SilverSpring]

Just to let you know the PSP LCD controller already supports multiple modes and can output standard vga (well a very slight difference).

Standard VGA is
one row:
640 pixels for video
96 pixels for horizontal sync
16 pixels for left border & porch
48 pixels for right border & porch
800 total pixels per row

one column:
480 pixels for video
2 pixels for vertical sync
10 pixels for top border & porch
33 pixels for bottom border & porch
525 total pixels per column

at 25.175 MHz clk freq (so 59.94 Hz vsync, 31469 Hz hsync).


PSP LCD controller has a mode pretty close to standard vga:
640-96-32-32
480-2-10-33
25.175 MHz


Native PSP mode is
480-41-2-2 (525 total)
272-10-2-2 (286 total)
9 MHz (so 59.94 Hz vsync, 17143 Hz hsync)

Theres also a 640x480@27Mhz and a 720x480@27MHz. You should be able to connect directly to the LCD controller.

[SpectroPlasm]

i am aware of this but thanx for the info silverspring ,

@squirrel yes they would be very handy for me as i am using the ribbon to make the extra connections.

the PSP LCD is Panasonic Glass and Panasonic glass happens to be very hackable in terms of frequency and output.

so far on my osci and freq scanner the PSP mobo RAMDAC is capable of pushing a steady 720x480@27 and the good thing is the games don't need resizing at all if you happen to get it hooked up to a multisync monitor (Sony type ones) you'd get a nice image centered on your screen (a 720x480 image in a 800x600 res screen) i have tested it and it works BUT* i aint using the schematics i made up because it's really dirty. I need a clean plug 'n play type plug so it will look genuine.

more on this later

[SilverSpring]

ok, tell me if you need help with anything, sounds like an interesting project.

You also should be able to output custom resolutions by writing directly to the registers (0xBE140010-0xBE14001C for columns, 0xBE140020-0xBE14002C for rows). You may also need to set the flag at 0xBE140004 to indicate external display. Normally set to 0 when using PSP native display, but set to 1 when using the other modes the controller supports, eg. VGA etc. (probably only ever used with the TOOL devkit with external display sets).

[Jeroenskypsp]

Do you know that their's already hardware equipment for Audio+Video output? But it isn't sold anymore (sued).
It's PSP2TV. It's a module + PSP frontcover&flatcableprint that offers A/V output + PS2 joypad connection.
The negative issue is that the PSP frontcover must be switched with the one from PSP2TV, and a internal flatcable is add, so end of PSP guarantee/warranty.



Or is PSP2TV from Lik-Sang, and so not selling anymore because of Sony sue. Maybe that Lik-Sang can give you some detailed technical information about PSP Video output (audio=simple by 3.5mm 3 or 4 pole jack).

[Squirrel]

Spectroplasm, can you please read your PM?

[SpectroPlasm]

squirrel i replied sorry for the wait was kinda busy

the PSP2Tv is a neat ls a neat little toy but it's HUGE and plus you'll need to change front cover, i have a friend who has one and he isn't willing to open her up but anyhow the LCD ribbon line has these info in them.


~3 red signals
~3 blue signals
~3 green signals
1 h-sync
1 v-sync
1 clock line
and some other jumbo which is being looked at right now

more on this with pics next time

[SpectroPlasm]

Prototype v0.01 out try at your own risk
pin numbers are from left to right on the PSP LCD connectors

Pin#	Description

(1)	GND----------------\
(2)	GND----------------|-----GND

(3)	VCC---------------------	\
(4)	VCC---------------------	|------NC internally used to drive LCD power

(6)	R-LSB----------------|------------|220uF/50v|----->Red line

(13)	G-LSB----------------|------------|220uF/50v|----->Green line

(20)	B-LSB----------------|------------|220uF/50v|--------Blue line

(30)	Clocl/sD------->NC used for pixel sampling on LCD

(32)	H-sync------------>horizontal Sync / Y sync on S-video

(33)	V-sync------------>Vertical Sync / S sync on S-video
     
(35)	AVDD------------\
(36)	AVDD------------|-------------Analog power out +5V on scart cable

[SpectroPlasm]

*fix for the pin outputs
6-12 are Red lines
13-19 are Green lines
20-29 are Blue lines

in order to combine those lines together you'd need first to attach a single 220uF on each of them (each meaning Red, Green, Blue)

if you don't attach a 220uF you'd get a really dark picture and sometimes a washed out shade of black.

i'm still looking into combinning the sync in order to get proper S-video modes working