Which eeprom chip to use for burning my rom?

electro · Post by **electro** » Sat Feb 16, 2008 6:22 am

tepples wrote:
electro wrote:I assume the iNES header would always be the first 16 bytes in the hex code?
The iNES header is always the first 16 bytes of the iNES format rom. In the vast majority of roms, the PRG immediately follows. In a few rare cases, there is also a "trainer", or 512-byte block of preloaded save data that gets copied to $6000 through $7FFF, before the PRG data.

Thanks. Where would the CHR stuff be?

My code didn't make any use of video stuff, it was: .ineschr 0

However, I wonder how I could distinguish the CHR data from the PRG data, if I did have CHR data.

Thanks again,
T

Post by **tepples** » Sat Feb 16, 2008 6:45 am

If you use .ineschr 0, you are specifying a board with CHR RAM. Otherwise, the CHR ROM immediately follows the PRG ROM.

electro · Post by **electro** » Sat Feb 16, 2008 7:20 am

Ok, so the CHR rom stuff would immediately follow the PRG stuff.

Would the CHR rom stuff look different than the PRG stuff?

How do you know where the PRG stuff ends and the CHR stuff begins in the hex code?

(Thanks again)
T

(I didn't know that about ineschr 0. I thought just meant you're not using any video stuff in your code. I have to study that more.)