Planets: TEOS v2.02 — Registration Keygen

A registration key generator for Planets: TEOS v2.02, a 1994 DOS BBS door game by Seth Able Robinson.

Usage

Run keygen.exe — no installation required.

1. Enter the Sysop Real Name exactly as you will type it in PLANCFG.EXE
2. Enter the BBS Name exactly as you will type it in PLANCFG.EXE
3. Click Generate Key
4. Enter the resulting number as the Registration # in PLANCFG.EXE

Names are case-insensitive — the game uppercases them before checking.

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How the algorithm works

The key is computed entirely from the two names.
No server, no random seed, no date — the same names always produce the same key.

The algorithm was reverse-engineered from function 148D:0000 inside PLANCFG.EXE (a Turbo Pascal 7.0 16-bit DOS executable).

Step 1 — Uppercase both names

The game converts both names to uppercase before doing any math, so "sysop" and "SYSOP" produce identical keys.

Step 2 — Walk the Sysop name

Start with seed = 4.
For each character (1-indexed):

• Always add the character's ASCII value to seed
• If the index is even, also add ascii_value ÷ index (integer division)

seed += ord(ch)
if index % 2 == 0:
    seed += ord(ch) // index

Step 3 — Walk the BBS name

For each character (1-indexed):

• Always add the character's ASCII value to seed
• If the index is odd, add the index, then add seed ÷ index (using the already-updated seed)

seed += ord(ch)
if index % 2 == 1:
    seed += index
    seed += seed // index

Step 4 — Scale up small values

After both loops, the seed is multiplied up if it hasn't grown large enough:

Condition	Action
seed < 1000	multiply × 17
seed < 3000	multiply × 11
seed < 7000	multiply × 4

The checks are applied in order on the running value, so a very small seed can be multiplied by more than one factor.

Step 5 — The result is the registration code

The final 32-bit value is the number you enter in PLANCFG.EXE.

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Files

File	Description
keygen.exe	Win64 GUI keygen — just run it
keygen.pas	Free Pascal source (FPC 3.2.2, Win32 API)
keygen.py	Python command-line version

Building from source

Requires Free Pascal Compiler (tested with 3.2.2):

fpc keygen.pas -WG -O2 -Xs

Why I did this

I ordered valid keys from GamePort and have not received any response or keys. In case there are others who want VALID KEYS with their own information (bbs name/sysop/valid key), I'm posting this on Github.

License

This project is licensed under the MIT License — see LICENSE for the full text.