game
icon
title Frogs
set name frogs
manufacturer Gremlin
year 1978
genre Misc. (hof)
category Misc. (hof)
driver status good
driver source vicdual.c
snapshots MW: in game / CT: in game | title | artwork / Mr. Do: artwork / Dany69: artwork / PS: in game | title
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rating

57.1% after 121 votes
 
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display
colour emulation good
palette 0
display type raster
orientation horizontal
resolution 256x224
frequency 60.000000Hz
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sound
sound emulation good
channels mono
samples boing.wav
buzzz.wav
croak.wav
hop.wav
splash.wav
zip.wav
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controls
players 1
nplayers 1P
controls 4 way joystick
buttons 1
coin slots 1
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hardware
cpu Z80 @ 1.93356MHz
audio Samples
audio Discrete
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data
version added .034b02
last change(s) .113u3
roms
name size crc set flags sha1
316-119a.u48  1024  b1d1fce4  frogs    572015bede39b14526e93919b63b6d01ae38a09a 
316-118a.u47  1024  12fdcc05  frogs    06c6d17edec9fb03f46514c1f6c5d8c420ef4d05 
316-117a.u46  1024  8a5be424  frogs    ed8a09b4318929b83118f87e2da601028349f2bd 
316-116b.u45  1024  09b82619  frogs    1063e268138b4ff6a8037d8d1a0816c34bbac690 
316-115a.u44  1024  3d4e4fa8  frogs    4655c4922328837af410cb298e0c296ae0099591 
316-114a.u43  1024  04a21853  frogs    1e84eb84d5770f54925055b748ab9ca2aa72c1cc 
316-113a.u42  1024  02786692  frogs    8a8937fd92beecf1119fe3f6b41a700725412aa1 
316-112a.u41  1024  0be2a058  frogs    271f3b60cba422fff7e782fda198c3897c275b46 
316-0043.u87  32  e60a7960  frogs    b8b8716e859c57c35310efc4594262afedb84823 
316-0042.u88  32  a1506b9d  frogs    037c3db2ea40eca459e8acba9d1506dd28d72d10 
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cabinet art
cabinet frogs.png
marquee frogs.png
control panel frogs.png
flyer frogs.png
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additional information
info 0.34b2 [Nicola Salmoria]

Samples required

NOTE:
  • The Zip sound effect is hard to emulate 100% due to loading effects of the output stage on the charge stage. Derrick added some values to get a similar waveshape to the breadboarded circuit.
  • The Buzzz sound starts off a little louder in volume then settles down to a steady buzzz. Whenever the trigger goes low, the sound is disabled. If it then goes high, the buzzz then starts off louder again. The games does this every time the fly moves. So Derrick made the sample start with the louder effect and then play for 12 seconds. A fly should move before this. If not the sample loops, adding the loud part as if the fly moved. This is obviously incorrect, but a fly never stands still for 12 seconds.
WIP:
  • 0.128u3: Aaron Giles fixed Frogs, which exit with an error after taking a screenshot.
  • 0.113u3: Fixed rom names and added user1 proms ($0, 20 - timing).
  • 0.89u2: Derrick Renaud updated frogs to allow discrete sound to be used for tongue with samples for non-simulated sounds. Added Discrete sound again.
  • 0.89u1: Derrick Renaud modified samples handling so the fly movement can be simulated. Also the long croak for a free game is simulated. Added new 'buzzz' and 'croak' sample.
  • 0.89: Derrick Renaud removed discrete tongue sound and added Twisty's samples. The buzz sound of flys is constant because it can't be emulated properly until full discrete sound is supported. Added Samples sound (hop, boing, zip, croak, buzzz and splash.wav).
  • 0.88u2: Derrick Renaud added discrete "tongue" sound effect to Frogs. Added to DISCRETE_555_ASTABLE an option to use quick charge diode and modified DISCRETE_555_CC to discharge cap due to natural losses if there is no charging current. This makes it more accurate then the current perfect cap that will retain a charge forever (this will all be needed for Frogs).
  • 18th September 2003: Robin Merrill fixed Frogs to use a proper 3-way joystick instead of the previous incorrect setup that had a 2-way joystick with an extra button.
  • 0.36b7: Added 'Demo Sounds' dipswitch.
  • 0.34b2: Nicola Salmoria added Frogs (Gremlin 1978).
Recommended Games:
Romset: 9 kb / 10 files / 6.8 zip
history Frogs (c) 10/1978 Gremlin.


You're a frog on a lillypad and there's flies and insects flying around you. Jump and stick out your tongue to catch these critters. A dragonfly comes out towards the end of your game, if you catch the Dragonfly you get a free game.


- TECHNICAL -


Game ID : 112-119


Main CPU : Z80 (@ 1.93356 Mhz)

Sound Chips : Discrete circuitry


Screen orientation : Horizontal

Video resolution : 256 x 224 pixels

Screen refresh : 60.00 Hz

Palette colors : 64


Players : 1

Control : 4-way joystick

Buttons : 1


- SCORING -


Butterfly : 100 points

Housefly : 500 points

Dragonfly : Free Game


- SOURCES -


Game's rom.

Machine's picture.



Edit this entry at Arcade-History.com: http://www.arcade-history.com/?n=frogs&page=detail&id=880&o=2
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view high score and replay at MARP
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view in GameFAQs
view in KLOV
view in System16
view in The Arcade Flyer Archive
view in VGMuseum Gamepics
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cheats
cheats
code comments
00000000:E431:00000009:FFFFFFFF  Infinite Time
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