game
icon
title Lethal Thunder (World)
set name lethalth
manufacturer Irem
year 1991
genre Shooter (hof)
category Shooter / Flying Vertical (hof)
driver status good
driver source m92.c
snapshots MW: in game / CT: in game | title / EJ: in game / PS: in game | title | scores
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rating

70.2% after 28 votes
 
clones Thunder Blaster (Japan)
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display
colour emulation good
palette 2048
display type raster
orientation vertical
resolution 240x320
frequency 60.000000Hz
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sound
sound emulation good
channels mono
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controls
players 2
nplayers 2P sim
controls 8 way joystick
buttons 2
coin slots 2
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hardware
cpu V33 @ 9MHz
cpu V30 @ 7.15909MHz
audio YM2151 @ 3.579545MHz
audio Irem GA20 @ 3.579545MHz
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data
version added .036b06
last change(s) none since version .53
roms
name size crc set flags sha1
lt_d-h0.rom  131072  20c68935  lethalth    edbb5322082bde7136ab015931fdcd18e5c293a8 
lt_d-l0.rom  131072  e1432fb3  lethalth    4b6c22d740cd598d0e34e257910fe7c3d4f3fd32 
lt_d-h1.rom  131072  d7dd3d48  lethalth    b848feee55159e334f711e4f661d415ffc1e3513 
lt_d-l1.rom  131072  b94b3bd8  lethalth    7b89d9177d8b357b09317606cb2070c14c3449a5 
lt_d-sh0.rom  65536  af5b224f  lethalth    a07f2c6ca0e65af016d74b90342cfaab7535324e 
lt_d-sl0.rom  65536  cb3faac3  lethalth    e1ee32fac7ee9e97fbf68904572e90aa9d0c9460 
lt_7a.rom  262144  ada0fd50  lethalth    7eeb33360cacddf8887f3acce65350af0251936d 
lt_7b.rom  262144  d2596883  lethalth    5a9f7384c63304c3c1e27375419d59a2b476f46a 
lt_7d.rom  262144  2de637ef  lethalth    bd1be59d4fe9bf365454c1d471effd88aa942df6 
lt_7h.rom  262144  9f6585cd  lethalth    5d59addc65c3ce20e7ea090a178fe9e17fba525b 
lt_7j.rom  262144  baf8863e  lethalth    fd5937cd70fcffd861a207dc4769d34459dd28d3 
lt_7l.rom  262144  40fd50af  lethalth    d9bf1e339671fd167fad237bb5bc6d1b183686f5 
lt_7s.rom  262144  c8e970df  lethalth    7771c17b36dcc9f01ac9e033f3f86e571c5ebbd3 
lt_7y.rom  262144  f5436708  lethalth    e8cb278f4d310eeeb67e01534d17562c7fce62f0 
lt_8a.rom  262144  357762a2  lethalth    d13b2a0f5d48c0171bcef708589cad194a7ea1ed 
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cabinet art
flyer lethalth.png
PCB lethalth.png
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additional information
info 0.36b6 [Bryan McPhail]

WIP:
  • 0.106u3: Added missing 'Bonus Life' dipswitch.
  • 0.66: Bryan McPhail fixed some bugs in the NEC CPU emulation. This includes the 99 credits bug in Lethal Thunder.
  • 0.53: Bryan McPhail and Nicola Salmoria decrypted the sound CPU in Gunforce, Blade Master, Lethal Thunder, Undercover Cops, Mystic Riders, Major Title 2, Hook, R-Type Leo, In the Hunt and Perfect Soldiers.
  • 19th July 2001: Nicola Salmoria decrypted the sound CPU in Blade Master and Lethal Thunder.
  • 0.37b8: Bryan McPhail added preliminary Irem GA20 sound emulation. Preliminary sound in Blade Master, Gunforce, Undercover Cops and Lethal Thunder. Added V30 (14318180 Hz) CPU2, YM2151 (3579545 Hz), GA20 (3579545 Hz) and fixed gfx1/gfx2 rom addresses.
  • 0.36b11: Changed V33 CPU1 clock speed to 20MHz.
  • 0.36b9: Bryan McPhail added clone Thunder Blaster (Japan).
  • 0.36b9: Bryan McPhail and Nao fixed a few bugs in the NEC CPU core that caused problems in Hook, Gunforce, Lethal Thunder and maybe others.
  • 6th November 1999: Bryan McPhail added Thunder Blaster (Japan version of Lethal Thunder) to the M92 driver.
  • 0.36b6: Bryan McPhail added Lethal Thunder (Irem 1991). Starts with 99 credits (related to memcard?).
  • 24th September 1999: Oliver Bergmann sent in a NEC V20, V30, V33 cpu core, and Bryan McPhail submitted an Irem M92 driver with support for Blade Master, Gunforce, Lethal Thunder, Hook, Undercover Cops, R-type Leo, Major Title 2 and In The Hunt, but none of the games have sound because of an encrypted sound CPU.
LEVELS: 7

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Rafflesia

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Blazing Lazers

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Lethal Thunder

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Romset: 2944 kb / 15 files / 1.14 zip
history Lethal Thunder (c) 1991 Irem.


- TECHNICAL -


Irem M-92 system hardware


Main CPU : V33 (@ 9 Mhz)

Sound CPU : V30 (@ 7.15909 Mhz)

Sound Chips : YM2151 (@ 3.579545 Mhz), GA20 (@ 3.579545 Mhz)


Screen orientation : Vertical

Video resolution : 240 x 320 pixels

Screen refresh : 60.00 Hz

Palette Colors : 2048


Players : 2

Control : 8-way joystick

Buttons : 2


- TRIVIA -


This game is known in Japan as "Thunder Blaster".


- TIPS AND TRICKS -


The game has 4 endings depending on your performance :

Ending 1 - Defeat all the bosses.

Ending 2 - Let 2 bosses escape and defeat the others.

Ending 3 - Let 3 bosses escape and defeat the others.

Ending 4 - Let all the bosses escape, including the last boss.


- STAFF -
  • Composed by : Hiroshi Kimura
  • - SOURCES -
  • Game's rom.
  • Edit this entry at Arcade-History.com: http://www.arcade-history.com/?n=lethal-thunder&page=detail&id=1382&o=2
resource links view in MAWS
view in CAESAR
view high score and replay at MARP
view in Progetto EMMA (Italian)
view in arcade-history.com
view in GameFAQs
view in KLOV
view in MamEnd
view in System16
view in VGMuseum Game Endings
view in VGMuseum Gamepics
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cheats
cheats
code comments
00000000:E0144:00000006:FFFFFFFF  Infinite Lives PL1
00000000:E3A38:00000001:FFFFFFFF  Invincibility PL1
00000000:E3A41:000000F0:FFFFFFFF  Max Shot Power PL1
62000000:00000:00000000:00000000  Select Weapon PL1
00010000:E3A3E:00000001:FFFFFFFF  Laser Shot
00010000:E3A3E:00000002:FFFFFFFF  Flame Shot
00010000:E3A3E:00000003:FFFFFFFF  Ball Shot
00000000:E3A48:00000000:FFFFFFFF  Infinite Shot PL1
00100000:E3A4C:00000000:FFFFFFFF  Infinite Laser PL1
00000000:E3A50:00000000:FFFFFFFF  Infinite Ball PL1
00000000:E3A5B:00000000:FFFFFFFF  Infinite Flame PL1
00000000:E0008:00000000:00000080  Rapid Fire PL1:Turn it OFF on name entry screen. Don't use this cheat with the Flame and/or Laser cheats or the game may crash
60000000:00000:00000000:00000000 
00000000:E0174:00000006:FFFFFFFF  Infinite Lives PL2
00000000:E3AD8:00000001:FFFFFFFF  Invincibility PL2
00000000:E3AE1:000000F0:FFFFFFFF  Max Shot Power PL2
62000000:00000:00000000:00000000  Select Weapon PL2
00010000:E3ADE:00000001:FFFFFFFF  Laser Shot
00010000:E3ADE:00000002:FFFFFFFF  Flame Shot
00010000:E3ADE:00000003:FFFFFFFF  Ball Shot
00000000:E3AE8:00000000:FFFFFFFF  Infinite Shot PL2
00100000:E3AEC:00000000:FFFFFFFF  Infinite Laser PL2
00000000:E3AF0:00000000:FFFFFFFF  Infinite Ball PL2
00000000:E3AFB:00000000:FFFFFFFF  Infinite Flame PL2
00000000:E0009:00000000:00000080  Rapid Fire PL2:Turn it OFF on name entry screen. Don't use this cheat with the Flame and/or Laser cheats or the game may crash
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