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Title: Copying information from 27C64 to 27C512 Post by: Malembe on October 13, 2013, 08:22:33 AM Hi there, everyone!
I encountered a small problem those days when i want to upgrade the game that i have already on a poker machine (Bally 5000 plus, Joker Wild), from 1989 version to 1997 version of it. On slot U88 i found that the eprom is a 27C512 type, when normally should be a 27C64. I have the programmer, i have the eraser, i have the original GPK.U88 for this new game...but how can i copy this to an 27C512. If i put the original 27C64, the game is working if i am trying to put the 27C512, with the content of an 27C64, dark screen. How did it work before and how i can make a functionally copy of 27C64 into 27C512, to work properly. I have only one 27C64 and a bunch of 27C512! Title: Re: Copying information from 27C64 to 27C512 Post by: knagl on October 13, 2013, 09:44:39 AM I'm very green when it comes to burning EPROMs, but have you tried copying the data 8 times into a 512k file (8*64=512) so that it's just repeated eight times throughout the chip, then try it in the machine?
Perhaps someone else can better explain what I'm trying to say to do... Title: Re: Copying information from 27C64 to 27C512 Post by: Malembe on October 13, 2013, 09:50:55 AM No, i didn't try and honestly, i don't know how to do that, also i am beginner, all i know is that i'm trying to do that, is telling me that the eproms is not empty " blanck check..error"
Title: Re: Copying information from 27C64 to 27C512 Post by: rickhunter on October 13, 2013, 12:25:31 PM With an S+ the easy solution was to burn the 27c512 with an offset of c000. I don't know if this will work no a bally though. The other way is to copy the data 8 times into a new file and then burn that. This is how you do it using a winodws command prompt. Let's call your original file small.bin, copy it to the root of C so it is easy to find then open a command prompt and type the following
copy small.bin+small.bin+small.bin+small.bin+small.bin+small.bin+small.bin+small.bin big.bin The resulting file, big.bin will have the data duplicated 8 times and you burn that to a 27c512 and it should work. Title: Re: Copying information from 27C64 to 27C512 Post by: uniman on October 13, 2013, 12:43:14 PM For Universal game owners;
I've done the same thing when backing up Universal game files. They are originally on a 2732 EPROM, a 24 pin chip that sits in a 28 pin socket. Using a GQ reader/burner from MCUmall I read the eprom as 2732 and save a copy. Then switch to 27c512 on my reader and open the saved file. Now copy down 16 times (in my case, eight times for a 2764) and burn the chip. Actually I copy down four times and then recopy the four, four more times. :127- Much easier to find 27c512's than 2732's. |