The game resets if the checksum doesn't match. The second check gets the checksum of the bytes in the range of 0x4AA0- 0x4BA0 (Konami) / 0x1880- 0x197F (Centuri) / 0x16A0- 0x179F (Atari).If the checksum doesn't match, the game hangs. The first check gets the checksum of the first three bytes of the second copyright string (Konami / Centuri) or the first copyright string (Atari).On the transition from the demo / game to the title. The game hangs if the checksum doesn't match. The game gets the checksum of the bytes in the range of 0x4D9F- 0x4E9E (Konami) / 0x0114- 0x0213 (Centuri) / 0x0090- 0x018F (Atari).In the Konami version only, the game gets the checksum of 0x0711- 0x0811.The game hangs if the checksum doesn't match.īefore drawing enemy plane icons on HUD. The second check gets the checksum of the bytes in the range of 0x3310- 0x340F (Konami) / 0x4850- 0x494F (Centuri).The first check gets the checksum of the bytes in the range of 0x0008- 0x0307 (Konami) / 0x0038- 0x0307 (Centuri) / 0x4930- 0x4C2F (Atari). On the transition from the high score table to the game demos. If it doesn't use either, the game hangs. In the Konami version only, before displaying the high score table, the game checks to see if the copyright string is using palette 05 or 10.The game resets if the checksum doesn't match.īefore displaying the high score table. In the Konami version only, the game gets the checksum of 0x086B- 0x087E (The copyright string).There are multiple checks on the title screen. If the checksum doesn't match, the game resets. On the crosshatch screen, the game gets the checksum of memory space 0x5648- 0x5647 (Konami) / 0x0E20- 0x0F1F (Centuri) / 0x0BC0-0CBF (Atari). If the checksum doesn't match, the game will not boot. The game gets the checksum of three bytes: The palette number for the Konami copyright string on the title screen, the first character ("©" or "L" depending on the publisher), and the third character ("K" or "C"). but it's more complicated than that, because there are many more checks to keep pirates at bay. Potential pirates would have to find both strings to actually change the text on the title screen. The game draws the first string on even-numbered frames and the second string on odd-numbered frames. There are two copies of the Konami copyright string in the game: One at 0x086D (Konami) / 0x086F (Centuri) / 0x086C (Atari), and another at 0x4902 (Konami) / 0x4925 (Centuri) / 0x487F (Atari). 1.6 Phase Five - Special Copyright Checks.So let us end by acknowledging what it took to land people on the moon in 1969 with the limited computing power that was available at the time. Armstrong did say that, on a worrying scale from one to 10, walking on the moon was about a one – whereas making the final descent to land was about a 13. This could be a huge relief for the astronauts. I am sure that the flying and landing of the space craft would not be put solely into the hands of the computer, but it would have much more information and intelligence and would be able to make many more decisions than the Apollo 11 computer was able to do in 1969. Perhaps the biggest change we would see is the computer being a lot more artificially intelligent. That said, it would look much prettier thanks to advances in camera technology. But with the larger files we now send – and from greater and greater distances – to get an image from a spacecraft to Earth today will take relatively longer than it did in 1969. The actual time it takes to communicate is the same today as it was in 1969 – that is, the speed of light, which means that it takes 1.26 seconds for a message to get from the moon to Earth. Surprisingly, one thing that wouldn’t be better today is the communication speed with Earth. Trump wants to send NASA back to the moon using Pell grant money.Elon Musk tweets ‘Occupy Mars’ alongside photo of the Moon.Nasa to open moon rock samples sealed since Apollo missions.
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