Arcade & Retro Repairs & Mods, all new recipe, with no added MSG...

Inviere

Has anyone any experience with running a crt screen from a raspberry pi via rgb?

BGOllie

got a couple of these from Mitch recently & just finished fixing the first one.

Original roms (those goldenish 2716 eproms) had broken legs. Repaired a few so I could read them and find out what the game was :
Kamikaze III , a galaxian bootleg. I then replaced them all with 2732 instead

Had to replace most of the IC on the address bus on columns 6&7 : all buffers were out, and ls138 on column 7 as there was a good bit of corrosion on the legs and traces.

Board then was stuck on test, displaying the boot and seemingly resetting. However the reset line was high at all times. I checked the voltages and the board was barely getting 4.2v .

So I did the DC mod (removed filter caps, resistors, transistor and voltage regulator and remiving & bridging the diodes) . Board then booted fine.

There was still some issues.

1 Sound was out - ended up being an adapter issue. These board output sound in different pinout than the standard galaxian setup.

Last issue remaining was the diving sprites and explosions were displayed on the top of the screen. I had a quick check at the Galaxian repair guide pdf and it mentioned two ls163 at 4t and 5t. Checked and one of them had a floating pin. Replaced it (ended up replacing both actually) and the board works fine now

eric90000

Lovely little Phillips CRT BGOllie. That arcade board running in TATE mode?

On the subject of CRT's actually I've been wanting to pick one up lately (currently using OSSC). Any idea where I'd source a 4:3 Sony Trinitron CRT? Or anyone here selling one?

BGOllie

mmm... what's TATE mode ?

eric90000

BGOllie wrote: »

mmm... what's TATE mode ?

I think it's Japanese for vertical?! I've always seen people refer to sideways CRT's as TATE. Maybe I'm wrong lol :pac:

BGOllie

ah ok. think we just called them vertical games Never heard TATE before (well certainly not back then), can't help but think it's one of those after the facts expression like "chip tune" or "pixel art" people seem to use now . At least I learned something new today
Most arcade games of that era were vertical games, but it wasn't a mode you could select really, that's just how games operated.

edit:
so I did look it up an it seems to simply mean "vertical" in japanese

o1s1n

Here you go;

”Tate” is a shortened form of the Japanese verb “tateru,” which means “to stand.” Pronounced “tah-teh,” though the common mispronunciation of “tayte” has gained semi-acceptance. Also commonly spelled with all capital letters (“TATE”), though it is not an acronym.

Basically the word for having monitors rotated in 3:4 rather than 4:3.

CiDeRmAn

Every day is a school day!

CathalDublin

o1s1n wrote: »

Here you go;

”Tate” is a shortened form of the Japanese verb “tateru,” which means “to stand.” Pronounced “tah-teh,” though the common mispronunciation of “tayte” has gained semi-acceptance. Also commonly spelled with all capital letters (“TATE”), though it is not an acronym.

Basically the word for having monitors rotated in 3:4 rather than 4:3.

and I always just thought it was short for rotate:eek:

o1s1n

CathalDublin wrote: »

and I always just thought it was short for rotate:eek:

Me too

The Last Bandit

Simple mod this evening to get back into the swing of things - modding a GBA with a backlit screen

Noticed a few things not mentioned in the guides though:

On the back of the adapter cable in a little support pad for the connector- its conductive so should be covered with a piece of tape.

The front metal surround of the new LCD can be removed without the whole screen falling apart, removing this allows for a better fit.





Really transforms the console and well worth doing !!

Tom Mann Centuria

The Last Bandit wrote: »

Simple mod this evening to get back into the swing of things - modding a GBA with a backlit screen

Noticed a few things not mentioned in the guides though:

On the back of the adapter cable in a little support pad for the connector- its conductive so should be covered with a piece of tape.

The front metal surround of the new LCD can be removed without the whole screen falling apart, removing this allows for a better fit.

Really transforms the console and well worth doing !!

Much soldering involved? I've thought more than once about doing this, especially since my son cracked my gameboy micro screen but lack the skill/confidence to do it.

eddhorse

I have two screens on the slow boat to do the same.

Edit : that looks great by the way

The Last Bandit

Just 1 wire to solder, most of the work is trimming the plastic to get the screen to fit nicely.

Jack burton

Have at least 3 GBAs that need doing. Might do a full mod and spray one a nice colour. It's currently a lovely mix of cream and brown :S

CiDeRmAn

Wow, if you're back in business, I've a Veccy and a Turbo Express that need some lovin!

DaveyDave

Tried to open the Dreamcast, finally, but the screws are on too tight and I only have those really skinny silver coloured screwdrivers that you can't grip.

I wonder if the local Woodies would have anything that small with a proper handle on it? Really need to clean the rail.

The Last Bandit

CiDeRmAn wrote: »

Wow, if you're back in business, I've a Veccy and a Turbo Express that need some lovin!

No-boder, as they say around my way..

CathalDublin

The Last Bandit wrote: »

Simple mod this evening to get back into the swing of things - modding a GBA with a backlit screen

Noticed a few things not mentioned in the guides though:

On the back of the adapter cable in a little support pad for the connector- its conductive so should be covered with a piece of tape.

The front metal surround of the new LCD can be removed without the whole screen falling apart, removing this allows for a better fit.





Really transforms the console and well worth doing !!

looks the business, definitely picking up one of those

eddhorse

Do you have a link to the screen you purchased?

CathalDublin

eddhorse wrote: »

Do you have a link to the screen you purchased?

Interested in this too, the one I was look at was this one
https://www.aliexpress.com/item/XBERSTAR-Replacement-32Pin-40-Pin-For-Gameboy-Advance-MOD-LCD-Backlight-Kit-Cable-adapter-for-GBA/32832335986.html?spm=2114.search0104.8.4.c6a451ddzQNWhj&priceBeautifyAB=0

The Last Bandit

40 pin version of this one, comes with a replacement glass screen as well.

https://www.ebay.ie/itm/Gameboy-Advance-MOD-LCD-Backlight-Kit-32-or-40-Pin-GBA-SP-AGS-101-Backlit-Screen/401511598530

o1s1n

For those who are too lazy to crack a GBA open (!), there are a few sellers selling modded versions of these on ebay.

Andrew76

o1s1n wrote: »

For those who are too lazy to crack a GBA open (!), there are a few sellers selling modded versions of these on ebay.

:pac:

I bought mine a good few years ago now, didn't have the patience nor skills to do the mod myself. It makes the GBA usable again tbh.

o1s1n

Yeah I always meant to buy one of them after you got yours. As a console it really is lovely looking and nice to hold. That mod turns it into the handheld it should have always been.

I remember when a mate first got one when they came out along with a Tony Hawk game, the pair of us had to huddle under a fluorescent light to see anything.

eddhorse

Yeah the monochrome is difficult viewing now, probably why my eyesight is so bad.

Skerries

DaveyDave wrote: »

Tried to open the Dreamcast, finally, but the screws are on too tight and I only have those really skinny silver coloured screwdrivers that you can't grip.
.

they should have a hole at the top that you stick another driver through to give you more leverage

I see the GDEMU has been cloned, surprised its taken so long given the demand and waiting list for them, hardware seems the same, software probably not so much if there everdrive clones are anything to go by.

http://www.jackdiy.cn/page143?product_id=107

Keithchap

Keithchap wrote: »

Cool thanks for your help. Here are some pics.

Just wanted to say thanks to those that were helping me out with this, took a back seat when my litle girl arrived. Just switched the machine back on to test it and it came on no problem so who knows, if it freezes again I'll do as suggested and switch out the board. Thanks again for your time.

Shapey Fiend

Deleted User wrote: »

I see the GDEMU has been cloned, surprised its taken so long given the demand and waiting list for them, hardware seems the same, software probably not so much if there everdrive clones are anything to go by.

http://www.jackdiy.cn/page143?product_id=107

Sweet. Wasn't aware there were everdrive type solutions for the Dreamcast. My dad threw out my modded DC years ago so that'd be a nice cost effective way to get back into it.

edit: just looking it up there says the performance is pretty damn slow so burnt CD's are probably still superior option.

edit2: Ah right the GDROM solution works better. I'm all caught up.