| Electronics > Projects, Designs, and Technical Stuff |
| Game ROm..damaged ? 27C040 |
| << < (3/3) |
| nick_d:
The authoritative source is check the datasheet. The quick way is Google 27c040 vs 27c1001. By doing that I found that 27c0x0 is compatible with 27cx001. 27c040 = 27c4001 = 512 kbyte. 27c010 = 27c1001 = 128 kbyte. I believe smaller chip will ignore the top 2 address lines so 4 copies of it will appear in the larger chip's address space. Apparently the game wasn't large enough to fill up the ROM so they used a smaller and cheaper ROM than what the motherboard could have taken. Also check filesize of the image you have, if it's 512kbyte check if the last 3/4 is 00 or FF or copies of the first 1/4. cheers, Nick |
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