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opcode

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opcode last won the day on June 30 2020

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About opcode

  • Rank
    Quadrunner
  • Birthday 12/20/1970

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  • Custom Status
    Bringing new life to your ColecoVision!
  • Gender
    Male
  • Location
    MA, USA
  • Currently Playing
    Penguin Adventure, Gradius
  • Playing Next
    Donkey Kong Arcade

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  1. Please contact Grazi at [email protected] Perhaps your email on file is out-of-date. Sent from my iPhone using Tapatalk
  2. Invoices include all games, so if you received for Gradius only, chances are that is the order we got from you. Please contact Grazi at [email protected] Sent from my iPhone using Tapatalk
  3. The newsletter was sent to all members. If you didn’t receive, your email is filtering us somewhere. Please add [email protected] to your contact list. Sent from my iPhone using Tapatalk
  4. Invoices sent to members 1 to 50 so far Sent from my iPhone using Tapatalk
  5. I believe someone else is doing Gorf. Not sure about voice though. Sent from my iPhone using Tapatalk
  6. Not yet. Please be patient. Still shipping color lines.
  7. opcode

    Bosconian

    We are sending invoices for the color line, please be patient.
  8. Call uses 3 bytes. First byte is the opcode, then the address (2 bytes). If the 1st byte gets corrupted, then you no longer have a call. Depending on the opcode you get instead, the address bytes can become other opcodes. Now, if the address gets corrupted, then you will call some random routine. The game could crash, or you could be “lucky” and it calls the very end of some harmless code followed by a Return opcode. Sent from my iPhone using Tapatalk
  9. But yeah, if it is just 2 bytes, chances are it corrupted a call and the new instructions are mostly harmless.
  10. Well, that isn't the listing. But anyways, looks like someone already fixed it. Unfortunately I am just too busy to disassemble right now, but I can do that eventually, when I get to create the SGM2 remaster version.
  11. Can you post the listing here? I can take a look Sent from my iPhone using Tapatalk
  12. Comparing the two versions should be fairly easy to “fix”. Disassemble, compare, “fix”. It is possible that it got corrupted but was still “working” mostly. For example, if a call instruction gets corrupted, it can become a bunch of harmless other instructions. The game still runs, but whatever the call routine was responsible for will no longer run. Sent from my iPhone using Tapatalk
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