What do the letters at the end of ROMs mean?

Here is a list of common ROM tags, retrieved from the public domain. I also noted some ROM specifics to look out for and explained what they mean farther down the page.

  • [!] – Verified Good Dump (These are guaranteed to be error-free)
  • [b] bad dump (self-explanatory, ususally buggy, slow, or with missing sections)
  • [h] hacked rom (not an illegal obtain, just something not quite right in one or more sections of the code)
  • [a] – Alternate ([a1], [a2], [a3], etc. if there are more than one, still good dumps)
  • [b] – Bad Dump
  • [BF] – Bung Fix
  • [c] – Cracked
  • [f] – Other Fix
  • [h] – Hack
  • [o] – Overdump
  • [p] – Pirate
  • [t] – Trained
  • [T] – Translation
  • (Unl) – Unlicensed
  • [x] – Bad Checksum
  • ZZZ_ – Unclassified
  • [!] – Verified Good Dump
  • (???k) – ROM Size Special Codes:
  • [C] – Color GameBoy
  • [S] – Super GameBoy
  • (M#) – Multilanguage (# of Languages)
  • [M] – Mono Only (NeoGeo Pocket)
  • (PC10) – PlayChoice 10 (NES)
  • (1) – Japan (Genesis)
  • (4) – USA (Genesis)
  • (5) – NTSC Only (Genesis)
  • ( 8 ) – PAL Only (Genesis)
  • (BS) – BS ROMS (SNES)
  • (ST) – Sufami Turbo (SNES)
  • (NP) – Nintendo Power (SNES)
  • (Adam) – ADAM Version (Coleco)
  • (PAL) – PAL Video Country Codes:
  • (A) – Australian
  • (C) – Chinese
  • (E) – Europe
  • (F) – French
  • (FN) – Finland
  • (G) – German
  • (GR) – Greece
  • (HK) – Hong Kong
  • (I) – Italian
  • (J) – Japan
  • (K) – Korean
  • (NL) – Dutch
  • (PD) – Public Domain
  • (S) – Spanish
  • (SW) – Sweden
  • (U) – USA
  • (UK) – England
  • (Unk) – Unknown Country
  • (-) – Unknown Country

STANDARD CODE NOTES:

[a] This is simply an alternate version of a ROM. Many games have been re-released to fix bugs or even to eliminate Game Genie codes (Yes, Nintendo hates that device).

[b] A bad dump often occurs with an older game or a faulty dumper (bad connection). Another common source of bad ROMs is corrupted uploads, which affect all subsequent copies of the ROMs.

[f] A fixed game has been altered in some way so that it will run more efficiently on a copier or emulator.

[h] Something in this ROM is not quite right. Often, a hacked ROM simply has a changed header or has been enabled to run in different regions. Other times, it could be a release group intro, or just some kind of cheating or funny hack.

[o] An overdumped ROM image has more data than is actually in the cart. The extra information is useless and will be removed from the true image.

[t] A trainer is a special section of code which executes before the game begins. It usually allows you to access cheats from a menu.

[!] Verified good dump. Should be error-free and play perfectly!

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Timtech

The site admin :)

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