Search found 269 matches

by keropi
Yesterday, 12:23 am
Forum: Monitor Q&A
Topic: Amiga RGB Jail Bars
Replies: 3
Views: 96

Re: Amiga RGB Jail Bars

I have been using amigas many many years with scart/rgb connections, they are not known for jailbars.
I am placing my bet it's your lcd tv that does that, did you try another one? It would worth to build the "Experimental cable design for some troublesome LCD TVs" one instead.
by keropi
April 4th, 2019, 6:13 pm
Forum: Arcade Games
Topic: Monster Land English : from Encryption to Decryption...
Replies: 112
Views: 14132

Re: Monster Land English : from Encryption to Decryption...

Thanks again for the info!
Yes many many things could be wrong, a starting point helps!
I'll report back when the culprit is found
by keropi
April 4th, 2019, 3:19 pm
Forum: Arcade Games
Topic: Monster Land English : from Encryption to Decryption...
Replies: 112
Views: 14132

Re: Monster Land English : from Encryption to Decryption...

thanks for the input mpatou! appreciate it!!
yes it looks like a cpu work ram issue?
do you have any idea which ram is that on the board? is it the 2x SONY srams at M1 and N1 ? or the K5 one?
by keropi
April 4th, 2019, 11:13 am
Forum: Arcade Games
Topic: Monster Land English : from Encryption to Decryption...
Replies: 112
Views: 14132

Re: Monster Land English : from Encryption to Decryption...

mpatou, any idea what could trigger glitches like that on an original board? for example: starting with the sword before talking to the 1st guy: http://i.imgur.com/j8VqefM.png random game overs: http://i.imgur.com/nZ9KGEH.png http://i.imgur.com/5jmxXGF.png glitches but game does not freeze http://i....
by keropi
March 19th, 2019, 2:55 pm
Forum: Arcade Games & Artwork
Topic: SOLD 3x MV1FZ mobos with CR-2032 mod
Replies: 1
Views: 95

Re: FS: 3x MV1FZ mobos with CR-2032 mod

all sold now off site, thanks
by keropi
March 19th, 2019, 12:35 pm
Forum: Arcade Games & Artwork
Topic: SOLD 3x MV1FZ mobos with CR-2032 mod
Replies: 1
Views: 95

SOLD 3x MV1FZ mobos with CR-2032 mod

Hiya I am selling 3 MV1FZ mobos , they are tested, clean and CR-2032 modded. Various scratches and marks on the plastic part, please see pics for details. http://i.imgur.com/RVuK9VWm.jpg http://i.imgur.com/6bVIYvDm.jpg http://i.imgur.com/rdBOEaOm.jpg http://i.imgur.com/1R5Uvphm.jpg http://i.imgur.co...
by keropi
January 30th, 2019, 6:38 pm
Forum: Game Hardware Q&A
Topic: Good replacement for 55ns 2148L SRAM?
Replies: 0
Views: 93

Good replacement for 55ns 2148L SRAM?

Hello, anyone knows of a good replacement for the MBM2148L-55 1K x 4 SRAM? preferably one that does not reach 80 degrees celcius when working? :lol: I found a list here: http://www.citylan.it/wiki/index.php/SRAM_1k_x_4 , tried my luck with some HM6148HLP-55 ones but either half are faulty (wouldn't ...
by keropi
January 26th, 2019, 4:23 pm
Forum: Game Hardware Q&A
Topic: Why is my Pang3 C-Board modded like this?
Replies: 4
Views: 173

Re: Why is my Pang3 C-Board modded like this?

Thanks for the confirmation. Since it works and it was in great condition with an awesome price I can't complain :)
by keropi
January 26th, 2019, 2:08 pm
Forum: Game Hardware Q&A
Topic: Why is my Pang3 C-Board modded like this?
Replies: 4
Views: 173

Re: Why is my Pang3 C-Board modded like this?

gonna answer my question most likely, I found this page: https://www.arcadefraidi.com/repairs/three-wonders-suicide-battery-cps1-capcom/ and it seems this is the mod so that you can run decrypted roms. On the B-Board the 2 roms on positions 1 and 7 where soldered masked roms, rom on position11 was s...
by keropi
January 26th, 2019, 1:49 pm
Forum: Game Hardware Q&A
Topic: Why is my Pang3 C-Board modded like this?
Replies: 4
Views: 173

Why is my Pang3 C-Board modded like this?

Hiya! I recently got a working PANG3 CPS-1 board, A-board is a 12mhz one that looks fine with no weirdness going on, B-board is the expected Mitchel one but C-Board looks like this: http://i.imgur.com/aM6xbRzl.jpg http://i.imgur.com/6AmAmuZl.jpg I don't know much about CPS-1 but this looks like a C-...
by keropi
January 25th, 2019, 10:38 pm
Forum: Monitor Q&A
Topic: PTC rated at 25ohm, coils is 27ohm : is it an issue?
Replies: 2
Views: 109

Re: PTC rated at 25ohm, coils is 27ohm : is it an issue?

thanks for the info grantspain , appreciate it!
by keropi
January 25th, 2019, 7:13 pm
Forum: Monitor Q&A
Topic: PTC rated at 25ohm, coils is 27ohm : is it an issue?
Replies: 2
Views: 109

PTC rated at 25ohm, coils is 27ohm : is it an issue?

Hiya! I did a tube swap on my cab and I noticed that the new tube has a 27ohm degaussing coil , the old one had a 25ohm coil. The PTC on the POLO 25/28" chassis is a Philips 96209 one: http://i.imgur.com/Thebb9u.png is the +2ohm an issue? I would prefer not to mess with the new tube since it's actua...
by keropi
January 11th, 2019, 5:18 pm
Forum: Arcade Games
Topic: Sexually suggestive enemies in arcade games
Replies: 11
Views: 947

Re: Sexually suggestive enemies in arcade games

- no trigger warning
- no ptsd tag

it's 2019 already :ugeek: :fastlove:
by keropi
January 11th, 2019, 2:41 pm
Forum: Arcade Games
Topic: Monster Land English : from Encryption to Decryption...
Replies: 112
Views: 14132

Re: Monster Land English : from Encryption to Decryption...

finally replaced the ceramic ram ICs : http://i.imgur.com/fDBhyNJl.jpg the difference in heat is just too great. From 80 degrees "burn finger in 2sec" temps now the new ones work at 25~30max - they are still 1986 devices after all... IMHO it's a must to replace along the tantalum caps. I will measur...
by keropi
January 4th, 2019, 3:35 pm
Forum: Arcade Games
Topic: Monster Land English : from Encryption to Decryption...
Replies: 112
Views: 14132

Re: Monster Land English : from Encryption to Decryption...

There is a god amount of voltage drop - the far-end gfx roms operate with ~4.8v , maybe replacing the really old srams will help on that regard. You could run an additional power line to the far end of the board. It's actually a pretty common practice on older boards. really? I had no idea I'll see...
by keropi
January 4th, 2019, 1:56 pm
Forum: Arcade Games
Topic: Monster Land English : from Encryption to Decryption...
Replies: 112
Views: 14132

Re: Monster Land English : from Encryption to Decryption...

This is my board (from the same seller) after some cosmetic changes and recap: http://i.imgur.com/VHzrgUw.jpg Here is what I found so far :D - both our boards run mpatou's decrypted roms - Muerto's board seem to be an earlier revision there custom chips were implemented in daughterboards - the mainb...
by keropi
December 30th, 2018, 8:44 pm
Forum: Arcade Games
Topic: PCB Wrapping 101
Replies: 59
Views: 2914

Re: PCB Wrapping 101

this is how I pack my pcbs and other "valuable" electronics for almost 2 decades now: - antistatic foam on solder side so the hole-thru components don't pierce the packaging - board inside antistatic foam bag - everything inside a classic antistatic bag with any docs and a small 5g silica pouch http...
by keropi
December 26th, 2018, 10:54 am
Forum: Game Hardware Q&A
Topic: Wonder Boy color PROMS: can mame roms be used to burn new ones?
Replies: 4
Views: 205

Re: Wonder Boy color PROMS: can mame roms be used to burn new ones?

It is not a voltage issue for sure but it *could be* an issue that the unused pins are not defined as such and the GALs internal open collector causes the heat built up (I already tried grounding unused pins but did not help as they also need to be defined as such in the equation file). I asked if G...
by keropi
December 26th, 2018, 10:34 am
Forum: Game Hardware Q&A
Topic: Wonder Boy color PROMS: can mame roms be used to burn new ones?
Replies: 4
Views: 205

Re: Wonder Boy color PROMS: can mame roms be used to burn new ones?

I have also found this link but it is of no use to me , I don't have the original Wonder Boy proms to read :lol: so I am looking to make my own
I used GadgetFreak's GAL replacements but they get insanely hot so I am not comfortable with them.
by keropi
December 26th, 2018, 9:23 am
Forum: Game Hardware Q&A
Topic: Wonder Boy color PROMS: can mame roms be used to burn new ones?
Replies: 4
Views: 205

Wonder Boy color PROMS: can mame roms be used to burn new ones?

Hiya!

Wonder Boy for Sega System2 uses 3x N82S129AN proms as part of a 12bit DAC to generate the image.
Is it possible to use the MAME ROM data to burn into 3 new N82S129AN proms? Or a way to convert these mame dumps to something usable for real ICs ?

Thanks in advance for any info/help! :awe: