11 March 2016 - Forum Rules
Started by Ar8temis008, July 17, 2017, 05:43:50 AM
Quote from: nesrocks on July 17, 2017, 02:11:04 PMOh I thought it was mmc1. That's nice. Good news is that sram is disabled in the original megaman 3 rom header, so it should be safe to assume all addresses from $6000-$7FFF are free to use.
Quote from: Ar8temis008 on July 17, 2017, 06:38:33 PM1. What is BRK? Is it important or Just empty space.
Quote2.how do I re compile the rom from the disassembly.
Quote3. What is the number in the middle, between lsr and 00000000?
Quote from: Ar8temis008 on July 17, 2017, 06:38:33 PM2.how do I re compile the rom from the disassembly.
Quote from: Ar8temis008 on July 17, 2017, 06:38:33 PM3. What is the number in the middle, between lsr and 00000000?00000000: 4E4553 LSR $5345
Quote from: Disch on July 17, 2017, 08:09:25 PMNot all bytes are code. That BRK probably isn't actually code, it's probably some data. There's no way to tell whether or not it's empty space without more details.You probably can't. Unless the ROM is specifically disassembled to be re-assemblable, it likely can't be without a lot of work. Judging from the bit you posted (the LSR line), it seems like it's not re-assemblable.That's the raw binary data that makes up the instruction. 4E is the opcode for LSR immediate, and 4553 is the low/high bytes of the address. So 4E4553 = LSR $5345 00000000: 4E4553 LSR $5345
Quote from: Ar8temis008 on July 17, 2017, 08:22:22 PMHow do I get these other details?
QuoteIf I cant re assemble a rom, how am I supposed to edit anything?
Quotemakes sense, is there any place with the op codes for other instructions?
Quote from: kuja killer on July 17, 2017, 09:33:37 PMumm, 4E4553 is not code there...thats the first 3 bytes of the NES header. "NES"
Quote from: Disch on July 17, 2017, 09:42:12 PMOh... hahahahaha. Yeah. XD
Quote from: pianohombre on July 18, 2017, 02:09:48 AMIf you are successful with this you should consider adding save states to some SNES roms as well. Megaman X1-X3 and I believe MM7 still use the password system. Although, Rockman & Forte(Megaman and Bass) have a save state system.
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