It is currently Wed Jun 28, 2017 10:30 am

All times are UTC - 7 hours



Forum rules


1. NO BLATANT PIRACY. This includes reproducing homebrew less than 10 years old, with the exception of free software.
2. No advertising your reproductions, with the exception of free software.
3. Be nice. See RFC 1855 if you aren't sure what this means.



Post new topic Reply to topic  [ 45 posts ]  Go to page Previous  1, 2, 3
Author Message
PostPosted: Fri Sep 30, 2016 3:44 am 
Offline
User avatar

Joined: Sat Jul 04, 2015 9:58 am
Posts: 448
Location: -29.794229 -55.795374
Well, here are some pictures of a UOROM mod I've made a few weeks ago.
But I don't think this can help...
In fact, it may confuse you even more, since it looks like a rat's nest :oops:

https://drive.google.com/open?id=0B0OtM ... ERqVW5NNzQ
https://drive.google.com/open?id=0B0OtM ... U1qN3dmYk0


Top
 Profile  
 
PostPosted: Fri Sep 30, 2016 1:10 pm 
Offline

Joined: Sat Jun 03, 2006 9:17 pm
Posts: 303
Fisher wrote:
Well, here are some pictures of a UOROM mod I've made a few weeks ago.
But I don't think this can help...
In fact, it may confuse you even more, since it looks like a rat's nest :oops:

https://drive.google.com/open?id=0B0OtM ... ERqVW5NNzQ
https://drive.google.com/open?id=0B0OtM ... U1qN3dmYk0



Yep. lol


Top
 Profile  
 
PostPosted: Sat Oct 01, 2016 1:00 am 
Offline

Joined: Mon Sep 05, 2016 3:33 pm
Posts: 33
:lol: Have to agree on your rat nest. Thats pretty advance for us noobs the way u have that wired. Still cool to look at and study for wiring shortcuts.


Top
 Profile  
 
PostPosted: Sun Oct 02, 2016 6:55 am 
Offline
User avatar

Joined: Sat Jul 04, 2015 9:58 am
Posts: 448
Location: -29.794229 -55.795374
I found a test board that is a little less atrocious than the other.
Attachment:
20161002_104055.jpg
20161002_104055.jpg [ 526.83 KiB | Viewed 1450 times ]

Attachment:
20161002_104115.jpg
20161002_104115.jpg [ 517.7 KiB | Viewed 1450 times ]

I usually use it to test SRAMs or games.
Originally this was a pirate Hokuto no Ken 2 made by CCE.

That other was originally a Super Sprint, that had the ROMs and the mapper defective.
Now it's a hacked version of Castlevania 2, made by Bisqwit.

About the noobish level, I think I'm on the same level as you, maybe with a little more luck :-)

Edit: A similar board "naked" :lol:
https://drive.google.com/open?id=0B0OtM ... lBVSXNLQWc
https://drive.google.com/open?id=0B0OtM ... HNhcVZYYWs

Edit 2: More board "porn". This one is Rockman.
I scanned after cleaning and before putting it back together:
https://drive.google.com/open?id=0B0OtM ... nl5U1VScnM
https://drive.google.com/open?id=0B0OtM ... zViWURYN2M
I did not take a picture before, but both boards were really bad, now they're working fine :-)


Top
 Profile  
 
PostPosted: Mon Oct 03, 2016 12:34 pm 
Offline

Joined: Sat Jun 03, 2006 9:17 pm
Posts: 303
Are there any wiring diagrams for an actual UOROM board with 27C020?


Top
 Profile  
 
PostPosted: Mon Oct 03, 2016 12:55 pm 
Offline

Joined: Sun Apr 13, 2008 11:12 am
Posts: 5848
Location: Seattle
It's evident that you really want someone to just give you a set of no-think instructions.

For your own sake, please bother to learn some basics of digital logic¹. Your UNROM board is a fine place to start. Just because it didn't work doesn't mean it couldn't.



¹: Here's a tutorial from SparkFun, and the class notes from something that looks reasonable.


Top
 Profile  
 
PostPosted: Mon Oct 03, 2016 10:04 pm 
Offline

Joined: Sat Jun 03, 2006 9:17 pm
Posts: 303
lidnariq wrote:
It's evident that you really want someone to just give you a set of no-think instructions.

For your own sake, please bother to learn some basics of digital logic¹. Your UNROM board is a fine place to start. Just because it didn't work doesn't mean it couldn't.



¹: Here's a tutorial from SparkFun, and the class notes from something that looks reasonable.



I want to play the game. I don't want to really spend months learning it just to play it. Would be just as simple to say how that way everyone in the future will have this information here posted on the board. I really do not want to learn logic, electric circuits etc, just want to play the game. Thanks for the help.


Top
 Profile  
 
PostPosted: Tue Oct 04, 2016 12:44 pm 
Offline
User avatar

Joined: Tue Dec 04, 2012 3:28 pm
Posts: 329
Location: Canada
Tormenter wrote:
I want to play the game. I don't want to really spend months learning it just to play it. Would be just as simple to say how that way everyone in the future will have this information here posted on the board. I really do not want to learn logic, electric circuits etc, just want to play the game. Thanks for the help.


Then why not just buy a flash cartridge like the Everdrive N8? Why bother with all the soldering and everything if you have no desire to learn this stuff? I don't understand your reasoning there.

With a flash cart you just copy a ROM onto an SD card and you're done, and then you can play whatever game you want. It's much less hassle for you, really, and saves a few donor boards along the way.

Or you can use custom boards so that you don't have to rewire anything at all, just drop your EPROM chips in. Something like RetroStage's or INL's boards


Top
 Profile  
 
PostPosted: Tue Oct 04, 2016 1:32 pm 
Offline

Joined: Sat Jun 03, 2006 9:17 pm
Posts: 303
getafixx wrote:
Tormenter wrote:
I want to play the game. I don't want to really spend months learning it just to play it. Would be just as simple to say how that way everyone in the future will have this information here posted on the board. I really do not want to learn logic, electric circuits etc, just want to play the game. Thanks for the help.


Then why not just buy a flash cartridge like the Everdrive N8? Why bother with all the soldering and everything if you have no desire to learn this stuff? I don't understand your reasoning there.

With a flash cart you just copy a ROM onto an SD card and you're done, and then you can play whatever game you want. It's much less hassle for you, really, and saves a few donor boards along the way.

Or you can use custom boards so that you don't have to rewire anything at all, just drop your EPROM chips in. Something like RetroStage's or INL's boards



Because I like to have them on individual carts for my collection.


Top
 Profile  
 
PostPosted: Tue Oct 04, 2016 1:58 pm 
Offline

Joined: Sun Apr 13, 2008 11:12 am
Posts: 5848
Location: Seattle
Did you even follow his links?


Top
 Profile  
 
PostPosted: Thu Oct 06, 2016 4:40 pm 
Offline
User avatar

Joined: Sat Jul 04, 2015 9:58 am
Posts: 448
Location: -29.794229 -55.795374
Sorry man!
I took a look at my stuff and I have no original (US) UNROM :oops:
If I had I would strip the board naked and make some pics showing what to do.

You really don't need to learn that much, just a bit on how to interpret the diagrams.
If you lived near me, I would invite you to come to my home, have some nice chat, take some mate, play some retro games and look at this game's board.
But you don't live in the south of Brazil, do you?
I don't trust the mail here either... so I won't ask nobody to send me anything :-(


Last edited by Fisher on Wed Nov 30, 2016 4:51 pm, edited 1 time in total.

Top
 Profile  
 
PostPosted: Tue Nov 29, 2016 11:42 pm 
Offline
User avatar

Joined: Tue Apr 11, 2006 4:08 am
Posts: 207
Ice Man wrote:
Really? Pin 30 is lifted up and ONLY connected to pin 8 of the 74'32.

I cannot make it more clear.

UNROM -> UOROM:
Bend up pin 6 of 74'161
Bend up pin 9 and pin 10 from 74'32
Connect pin 9 from 74'32 to pin 2 74'32
Connect pin 11 of 74'161 to pin 10 of 74'32
Connect pin 6 of 74'161 to D3 of PRG ROM (DO NOT LIFT THIS PIN OF PRG ROM!)
Connect pin 8 of 74HC32 to pin 30 (A17) of PRG ROM (LIFT THIS PIN!)

There's really nothing else I can add/do. Schematics already showed how it's soldered.

Otherwise get an UOROM donor or check the connections with a multi meter.


I would like to convert UNROM on UOROM.
This method will work with famicom HVC-UNROM-02 board? (original Dragon Quest II Famicom)


I found this link:
http://www.famicomworld.com/forum/index ... #msg115726
Topic question concerns the HVC-UNROM-04, which is probably the same as HVC-UNROM-02.


Top
 Profile  
 
PostPosted: Thu Dec 01, 2016 6:50 am 
Offline

Joined: Fri Jul 04, 2014 2:34 pm
Posts: 288
Location: Germany
Theoretically it should work. I have successfully converted HVC-UNROM-XX to UOROM but don't ask me which revision I used. It's been some months ago. UNROM-02 should work fine. Just try it out. You can still revert it back if it fails to work. :P


Top
 Profile  
 
PostPosted: Thu Dec 01, 2016 5:41 pm 
Offline
User avatar

Joined: Sat Jul 04, 2015 9:58 am
Posts: 448
Location: -29.794229 -55.795374
I found some schematics that can help:
http://atariusa.com/Famicom_Schematics/ ... matics.png

I can disassemble a FC-UNROM-02 (i think it's this revision) board and post detailed pictures here, if you can wait a a couple or days, maybe up to some weeks, since I'm on a vacation trip now. :beer:

But the "generic" instructions are:
- Find the unused OR gate of the 74'32.
- Find the unused input pin of the 74'161 (usually it's pin 6, but it's good to check).
- Find the unused output pin of the 74'161 (usually it's pin 11, but it's goot to check).
- Disconnect any connected input/output pins of the unused gate of the 74'32 and the 74'161. Sometimes, the inputs are tied to +5v or GND.
- Connect the unused 74'161 input pin to D3.
- Connect the unused 74'161 output to one of the OR gate's inputs.
- Connect the other OR gate's input to PRG A14. Do a little check and you'll find some pins on the same IC already connected to that.
- Connect the OR gate output tho your ROM A17 and you're done. :wink:

I'm not sure of what pins exactly you should disconnect and connect to where, but this information may be enough once you figure what is connected to where.
I also think that's better to remove the ICs and pull the pins you'll need to rework. This way it's easy to undo the mod and normally results on a cleaner work.
This is what I've done here (some posts ago on this same thread), on a pirate board:
viewtopic.php?f=28&t=14829&start=30#p180384

Good luck and nice gaming!!


Top
 Profile  
 
PostPosted: Sat Dec 03, 2016 2:55 am 
Offline
User avatar

Joined: Tue Apr 11, 2006 4:08 am
Posts: 207
I have done UOROM according to the description of this topic:
http://www.famicomworld.com/forum/index ... #msg115726

Everything works OK. Both UNROM-128 and 256 UOROM run correctly (on the uorom cart).

I made two versions using HVC-UNROM-02 (DQIIj) - UNROM (without rewiring controller) and UOROM .


Attachments:
File comment: UOROM
PICT0014aorom.JPG
PICT0014aorom.JPG [ 234.84 KiB | Viewed 1036 times ]
File comment: UNROM
PICT0016.JPG
PICT0016.JPG [ 234.27 KiB | Viewed 1036 times ]
Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 45 posts ]  Go to page Previous  1, 2, 3

All times are UTC - 7 hours


Who is online

Users browsing this forum: No registered users and 3 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group