its world series baseball 98, im thinking either megaman the wily wars or crusader of centy
its world series baseball 98, im thinking either megaman the wily wars or crusader of centy
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Ok, WSB98 is a 3MByte game while Mega Man and Centry are 2MByte games. That being said, I think you will only need one eprom. You should start by removing the two ROM chips and figuring out which one is the first half of the game ROM. It will probably be the bottom ROM chip though.Originally Posted by gamemaster76
Do this by locating the Chip enable (/CE) pin of each ROM and tracing it back to where it goes. These pins should connect to one of the small chips on the back side. probably a 74ls138 or 74ls139. Let me know what you find.
the game works, its the bottom one but its not saving, could it be that the top one was the one that connected to the battery? or is it just dead? which pin would i have to wire to the battery to get it to work?
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You burned mega man? Did you use the sram modded version?
its crusder of centy
Super Moderator
OK. I think the sram is mapped at the location after the 3MBytes, so you need to connect the enable pin for the upper rom to the sram so it is mapped at the 2MB position. Im Not on my PC or near a circuit board to check, but you should be able to find pinouts for each very easily.
Find the /CE pin for the sram chip and for the 27c160.
when you say the upper roms enable chip to sram do you mean to the battery's pin? and why the upper rom and not the lower one that actually has the chip?
Super Moderator
I am referring to the logical locations for each addressable portion of memory and not the physical locations. No two chips can be enabled at any one time, so there are three enable pins which are decoded from the full addressable "memory map".
The centy software expects every single bit of the sram to be in an exact logical location, but that location is decoded with hardware to be where the second rom chip is. That being said, you need the enable pin for the second rom, instead, to enable sram.
so wire the enable pin where the second rom used to be to the battery?
Just wanted to point out and I can't remember which game it is but PCB P/N 670127 REV 1 does not work for reproductions. I have tried 3 different chips and multiple games on 2 different boards. I use a 400, 800, and a 160. None work.
I may at some point try and figure out why but I do not have the time for that right now.
Welcome to my world. I have not got a dual rom donor to work yet. I tried using just bottom rom and I was using a 27c160 chip and nothing. Now I am trying to split a rom Panorama cotton. I split it 2048KB on a 160 and 512KB onto a 400 but same results. Produced by Sega screen, sega logo, then black screen.
I don't get what these 74 chips are doing but these boards do not work. I'm about to rip the chip out and compare the board exactly as a plain simple board would be and see what differences there are and maybe rewire it. It's almost a waste of time but I want to do it lol.
Anybody had experience making a mega man wily wars patched rom work on a SRAM cart? I used madden 96 and NBA showdown 94 but it didn't work on neither. I defeat cutman, save then press the reset button and it didn't save anything. I tried the rom in kfusion and it does save
EDIT: I was using a game genie and it seems that was the problem
Last edited by srmoska; 12th-May-2016 at 19:04.
Ok so I grabbed a "normal" board and did some pin traces and found out what the problem is. On my Cotton game pins 10(rom 2) and 11(rom1) or "E" was not right. On rom 1 pin 11 went to pin 8 on the hd74hcoop on rom 2 pin 10 went to pin 11 on the hd74hcoop. On a normal board "E" needs to go to b17.
B17 goes to pins 4 and 5 of hd74hcoop. Not sure if I needed to or not but I removed the hd74hcoop while I was playing around. I simply jumpered holes 4 and 11 and holes 5 and 8 on the empty hd74hcoop spot.
I hope I wrote that right lol. Basically all you need to know is that B17 on the cart needs wired to (E) on your rom(s).
Well as pointless as it seems to edit a post over 2 months later, hopefully someone looks?
On Page 10 post 143 and so on, Wal666 uses a board to make a PS4, anyone know if that board is compatible with MegaMan Wily Wars? The game plays but save does not work?
Last edited by icemanxp300; 22nd-July-2016 at 00:58. Reason: Can't double post!
Super Moderator
Thread opened by request.
Sorry I never responded. I must have missed your post. The double posting rule pertains to short periods of time between posts. If no one seems to respond within a week or two, feel free to double post. Also feel free to PM me directly. I like to keep all discussions in this thread for others to find, but I may not see every post even if I would like to.
Really glad you got your Cotton cart working on your own, you must have learned a bit from that experience.
As for PS4, it sounds like you are using two different "types" of saving-boards. PS4 uses a large SRAM chip while the original Wily Wars uses a small EEPROM to save. These are not compatible with each other however, There is a patch for the Wily Wars ROM that changes it to use SRAM instead. This makes it compatible with SRAM type boards.
Yes I just came to the conclusion that PS4 and similar donors must just access save data from different locations within the rom and that is why they are not compatible for saving. As far as Cotton goes it was a learning experience doing pin traces but the game that really required learning was making Golden Axe 3.Thread opened by request.
Sorry I never responded. I must have missed your post. The double posting rule pertains to short periods of time between posts. If no one seems to respond within a week or two, feel free to double post. Also feel free to PM me directly. I like to keep all discussions in this thread for others to find, but I may not see every post even if I would like to.
Really glad you got your Cotton cart working on your own, you must have learned a bit from that experience.
As for PS4, it sounds like you are using two different "types" of saving-boards. PS4 uses a large SRAM chip while the original Wily Wars uses a small EEPROM to save. These are not compatible with each other however, There is a patch for the Wily Wars ROM that changes it to use SRAM instead. This makes it compatible with SRAM type boards.
That game has region protection so good that it required me to learn how to put a game genie master region code into the rom using a hex editor. Not only do you have to get the code but you have to convert it to hex and then open the rom and put that hex code into the rom. While not all the difficult once you do it, having no idea what hex code is or ever using a hex editor you are basically flying blind and hoping for the best.
I have so many of the EA games that are good save donors but I don't have any games that would require a big shell like that and I personally don't like the looks anyhow. Any interest here I plan on unloading them on ebay.
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