« previous next »
Pages: [1]   Go Down

Author Topic: Unknown code  (Read 6731 times)

0 Members and 1 Guest are viewing this topic.

Offline AngelFish

  • Is this my custom title?
  • Administrator
  • LV12 Extreme Poster (Next: 5000)
  • ************
  • Posts: 3242
  • Rating: +270/-27
  • I'm a Fishbot
    • View Profile
Unknown code
« on: January 09, 2011, 04:38:57 pm »
This topic will be for the discussion of Prizm code that seems odd or puzzling.

For example, the code between $01FE and $10D8 is odd. It follows a very specific pattern:

Code: [Select]
03 00 04 00 05 00 06 00 07 00 08 00 09 00 0A 00 0B
...
03 01 04 01 05 01 06 01 07 01 08 01 09 01 0A 01 0B
...
03 02 04 02 05 02 06 02 07 02 08 02 09 02 0A 02 0B
...


I can't figure out what this would be. It repeats until every other byte is 07 and ends with a sequence of FF's and 00's
« Last Edit: January 09, 2011, 04:41:00 pm by Qwerty.55 »
Logged
∂²Ψ    -(2m(V(x)-E)Ψ
---  = -------------
∂x²        ℏ²Ψ

Offline z80man

  • Casio Traitor
  • LV8 Addict (Next: 1000)
  • ********
  • Posts: 977
  • Rating: +85/-3
    • View Profile
Re: Unknown code
« Reply #1 on: January 11, 2011, 01:36:56 am »
Perhaps it could be some sort of look up table used by the OS.  ???
Logged

List of stuff I need to do before September:
1. Finish the Emulator of the Casio Prizm (in active development)
2. Finish the the SH3 asm IDE/assembler/linker program (in active development)
3. Create a partial Java virtual machine  for the Prizm (not started)
4. Create Axe for the Prizm with an Axe legacy mode (in planning phase)
5. Develop a large set of C and asm libraries for the Prizm (some progress)
6. Create an emulator of the 83+ for the Prizm (not started)
7. Create a well polished game that showcases the ability of the Casio Prizm (not started)

Offline Builderboy

  • Physics Guru
  • CoT Emeritus
  • LV13 Extreme Addict (Next: 9001)
  • *
  • Posts: 5673
  • Rating: +613/-9
  • Would you kindly?
    • View Profile
Re: Unknown code
« Reply #2 on: January 11, 2011, 01:52:43 am »
Looks like it must be some sort of look up table o.O The pattern is very peculiar... i wonder what the significance of it is?
Logged

Offline Juju

  • Incredibly sexy mare
  • Coder Of Tomorrow
  • LV13 Extreme Addict (Next: 9001)
  • *************
  • Posts: 5730
  • Rating: +500/-19
  • Weird programmer
    • View Profile
    • juju2143's shed
Re: Unknown code
« Reply #3 on: January 11, 2011, 01:54:01 am »
Hm, reminds me of something...
Logged

Remember the day the walrus started to fly...

I finally cleared my sig after 4 years you're happy now?
THEGAME
This signature is ridiculously large you've been warned.

The cute mare that used to be in my avatar is Yuki Kagayaki, you can follow her on Facebook and Tumblr.

Offline DJ Omnimaga

  • Clacualters are teh gr33t
  • CoT Emeritus
  • LV15 Omnimagician (Next: --)
  • *
  • Posts: 55943
  • Rating: +3154/-232
  • CodeWalrus founder & retired Omnimaga founder
    • View Profile
    • Dream of Omnimaga Music
Re: Unknown code
« Reply #4 on: January 11, 2011, 04:04:34 am »
What would that something be?
Logged

Offline jnesselr

  • King Graphmastur
  • LV11 Super Veteran (Next: 3000)
  • ***********
  • Posts: 2270
  • Rating: +81/-20
  • TAO == epic
    • View Profile
Re: Unknown code
« Reply #5 on: January 11, 2011, 11:18:56 am »
What does the ... mean?
Logged

Offline AngelFish

  • Is this my custom title?
  • Administrator
  • LV12 Extreme Poster (Next: 5000)
  • ************
  • Posts: 3242
  • Rating: +270/-27
  • I'm a Fishbot
    • View Profile
Re: Unknown code
« Reply #6 on: January 11, 2011, 01:18:22 pm »
It's just the part that I skipped to keep the code reasonably short. For one section, it looks like this:

Code: [Select]
03 00 04 00 05 00 06 00 07 00 08 00 09 00 0A 00 0B 00 0C 00 0D 00 0E 00 0F 00 10 00 11 00 12 00 13 00 14 00 15 00 16 00 17 00 18 00 19 00 1A 00 1B 00 1C 00 1D 00 1E 00 1F 00 20 00 21 00 22 00 23 00 24 00 25 00 26 00 27 00 28 00 29 00 2A 00 2B 00 2C 00 2D 00 2E 00 2F 00 30 00 31 00 32 00 33 00 34 00 35 00 36 00 37 00 38 00 39 00 3A 00 3B 00 3C 00 3D 00 3E 00 3F 00 40 00 41 00 42 00 43 00 44 00 45 00 46 00 47 00 48 00 49 00 4A 00 4B 00 4C 00 4D 00 4E 00 4F 00 50 00 51 00 52 00 53 00 54 00 55 00 56 00 57 00 58 00 59 00 5A 00 5B 00 5C 00 5D 00 5E 00 5F 00 60 00 61 00 62 00 63 00 64 00 65 00 66 00 67 00 68 00 69 00 6A 00 6B 00 6C 00 6D 00 6E 00 6F 00 70 00 71 00 72 00 73 00 74 00 75 00 76 00 77 00 78 00 79 00 7A 00 7B 00 7C 00 7D 00 7E 00 7F 00 80 00 81 00 82 00 83 00 84 00 85 00 86 00 87 00 88 00 89 00 8A 00 8B 00 8C 00 8D 00 8E 00 8F 00 90 00 91 00 92 00 93 00 94 00 95 00 96 00 97 00 98 00 99 00 9A 00 9B 00 9C 00 9D 00 9E 00 9F 00 A0 00 A1 00 A2 00 A3 00 A4 00 A5 00 A6 00 A7 00 A8 00 A9 00 AA 00 AB 00 AC 00 AD 00 AE 00 AF 00 B0 00 B1 00 B2 00 B3 00 B4 00 B5 00 B6 00 B7 00 B8 00 B9 00 BA 00 FF FF BC 00 BD 00 BE 00 BF 00 C0 00 C1 00 C2 00 C3 00 C4 00 C5 00 C6 00 C7 00 C8 00 C9 00 CA 00 CB 00 CC 00 CD 00 CE 00 CF 00 FF FF D1 00 D2 00 D3 00 D4 00 D5 00 D6 00 D7 00 FF FF FF FF FF FF DB 00 DC 00 DD 00 DE 00 DF 00 E0 00 E1 00 E2 00 E3 00 E4 00 E5 00 FF FF E7 00 E8 00 E9 00 EA 00 EB 00 EC 00 ED 00 EE 00 EF 00 F0 00 F1 00 F2 00 F3 00 FF FF F5 00 F6 00 F7 00 F8 00 F9 00 FA 00 FB 00 FC 00 FD 00 FE 00 FF 00
Logged
∂²Ψ    -(2m(V(x)-E)Ψ
---  = -------------
∂x²        ℏ²Ψ

Offline Juju

  • Incredibly sexy mare
  • Coder Of Tomorrow
  • LV13 Extreme Addict (Next: 9001)
  • *************
  • Posts: 5730
  • Rating: +500/-19
  • Weird programmer
    • View Profile
    • juju2143's shed
Re: Unknown code
« Reply #7 on: January 11, 2011, 01:51:29 pm »
Quote from: DJ Omnimaga on January 11, 2011, 04:04:34 am
What would that something be?
When messing with an hex editor I had seen patterns like that, I don't remember where, maybe at the beginning of an hard drive I think.
Logged

Remember the day the walrus started to fly...

I finally cleared my sig after 4 years you're happy now?
THEGAME
This signature is ridiculously large you've been warned.

The cute mare that used to be in my avatar is Yuki Kagayaki, you can follow her on Facebook and Tumblr.

Offline jnesselr

  • King Graphmastur
  • LV11 Super Veteran (Next: 3000)
  • ***********
  • Posts: 2270
  • Rating: +81/-20
  • TAO == epic
    • View Profile
Re: Unknown code
« Reply #8 on: January 11, 2011, 03:09:01 pm »
I see, so with the full thing, I understand a little more now.  It is a block of something. Is the next two bytes in this 00 01 by any chance?

Anyway, It follows the order of XX 00 (little endian, or it is skipping by 256).  I figured this out based off of those FF FF ones.  It starts at 03 for XX? What about 00-02?  Anyway, there are some sections which have their code FF'ed.  So, instead of XX 00, you have FF FF.  These are the codes in that block that have that:
Code: [Select]
BB 00
D0 00
D8 00
D9 00
DA 00
E6 00
« Last Edit: January 11, 2011, 03:09:45 pm by graphmastur »
Logged

Offline Munchor

  • LV13 Extreme Addict (Next: 9001)
  • *************
  • Posts: 6199
  • Rating: +295/-121
  • Code Recycler
    • View Profile
Re: Unknown code
« Reply #9 on: January 11, 2011, 04:47:55 pm »
I could bet it is a loop or a table.
Logged

Offline DJ Omnimaga

  • Clacualters are teh gr33t
  • CoT Emeritus
  • LV15 Omnimagician (Next: --)
  • *
  • Posts: 55943
  • Rating: +3154/-232
  • CodeWalrus founder & retired Omnimaga founder
    • View Profile
    • Dream of Omnimaga Music
Re: Unknown code
« Reply #10 on: January 12, 2011, 11:43:29 pm »
Quote from: juju2143 on January 11, 2011, 01:51:29 pm
Quote from: DJ Omnimaga on January 11, 2011, 04:04:34 am
What would that something be?
When messing with an hex editor I had seen patterns like that, I don't remember where, maybe at the beginning of an hard drive I think.
Ah I see, thanks for the info. I can't help there because I'm not tech-savy about that stuff. X.x
Logged
Pages: [1]   Go Up
« previous next »