MAWS - showing resource: explorer

title	Explorer
set name	explorer
manufacturer	bootleg
year	1981
genre	Shooter (hof)
category	Shooter / Flying Horizontal (hof)
driver status	good
driver source	galdrvr.c
snapshots	MW: in game \| parent / CT: in game \| title \| parent / Mr. Do: parent / PS: in game \| title \| scores \| parent zoom
rating	71.8% after 27 votes
parent	Scramble
other clones	Scramble (bootleg) Scramble (Galaxian hardware) Scramble (Stern) Strafe Bomb

colour emulation	good
palette	32
display type	raster
orientation	vertical
resolution	224x768
frequency	60.606061Hz

sound emulation	good
channels	mono

players	1
nplayers	2P alt
controls	8 way joystick
buttons	2
coin slots	2

cpu	Z80 @ 3.072MHz
cpu	Z80 @ 1.78975MHz
audio	AY-3-8910A @ 1.78975MHz
audio	AY-3-8910A @ 1.78975MHz

version added

.074

last change(s)

none

roms

name	size	crc	set	sha1
10l.bin	4096	d5adf626	explorer	f362322f780c13cee73697f9158a8ca8aa943a2e
9l.bin	4096	48e32788	explorer	7a98848d2ed8ba5b2da28c014226109af7cc9287
8l.bin	4096	c0dbdbde	explorer	eac7444246bdf80f97962031bf900ce09b28c8b5
7l.bin	4096	9b30d227	explorer	22764e0a2a5ce7abe862e42c84abaaf25949575f
3f.bin	4096	9faf18cf	explorer	1b6c65472d639753cc39031750f85efe1d31ae5e
4b.bin	2048	e910b5c3	explorer	228e8d36dd1ac8a00a396df74b80aa6616997028
c2.5f	2048	4708845b	scramble	a8b1ad19a95a9d35050a2ab7194cc96fc5afcdc9
c1.5h	2048	11fd2887	scramble	69844e48bb4d372cac7ae83c953df573c7ecbb7f
c01s.6e	32	4e3caeab	scramble	a25083c3e36d28afdefe4af6e6d4f3155e303625

cabinet	scramble.png
marquee	scramble.png
control panel	scramble.png
flyer	explorer.png
PCB	scramble.png

info

0.35b8 [Zsolt Vasvari]

0.06 [Nicola Salmoria]

Bugs:

Side-by-side test (see report). Gary Walton (ID 01028)

WIP:

0.124u1: Replaced 4x RC Filter sound with Discrete. Changed visible area to 224x768 and palettesize to 32 colors.
0.122u7: RansAckeR verified DIP locations from manuals for Scramble.
0.122u5: Couriersud fixed flipped tilemap offset for Scramble and clones (playable cocktail mode).
0.119u1: David Haywood added clone Scramble (bootleg).
0.116u1: Mark McDougall updated the protection implementation in Scramble (Stern) to use equations based on the implementation from fpgaarcade.com.
0.100u4: Hans Andersson added filters back into the Scramble driver. Added 6x RC Filter to Scramble and Scramble (Stern).
0.96u3: Pierpaolo Prazzoli improved sound in clone Explorer.
0.88u5: Thierry Lescot fixed rom filenames in Scramble.
0.78u5: Pierpaolo Prazzoli added clone Strafe Bomb (Omni 1981).

- 0.74: Pierpaolo Prazzoli added clone Explorer (bootleg 1981). TODO: Check these 3 bootlegs are worth supporting, if not remove them.

8th September 2003: Pierpaolo Prazzoli re-added Explorer (a Scramble bootleg) with sound.
26th April 2003: smf added a bootleg Scramble called Explorer to the Scramble driver, though sound does not work yet in it.
0.53: Changed palettesize to 99 colors.
1st June 2001: Zsolt Vasvari fixed the Galaxian / Scramble starfield graphics emulation.
31st May 1999: Zsolt Vasvari made the Galaxian/Scramble hardware games multi-session friendly.
0.35b8: Renamed (scramble) to (scrambls) and (scramblk) to (scramble).
0.35b6: Zsolt Vasvari added clones Scramble (Konami) and Scramble (bootleg).
10th March 1999: Zsolt Vasvari added two clones Scramble (a Konami version and a bootleg).
0.30: Mike Coates appropriate blue background in Scramble, Super Cobra and other games running on the same hardware. Frank Palazzolo fixed music tempo in Scramble.
0.28: Merged mooncrst, moonqsr and scramble vidhrdw into the new Galaxian driver. Mike Balfour added hiscore save in Scramble.
0.15: Sound support in Scramble. Nicola discovered that the garbled sound he experienced in Scramble was caused by a bad ROM. Therefore, if sound doesn't work, check your ROMset. Note that one ROM name changed from '2c' to '2d'.
0.12: Set up the second CPU to emulate sound in Scramble, but the sound that comes out is completely wrong. The background stars in Scramble and Super Cobra now blink. However Nicola don't know how close to the real thing it is.
0.07: Scramble has 100% correct colors. The same palette is used by Super Cobra, but it doesn't look right.
0.06: Nicola Salmoria added Scramble (Stern 1981) (wrong colors, no sound). The background stars don't blink. Maybe it should also be clipped to the top and bottom of the screen? Two players mode doesn't work. The video hardware is very similar to Galaxians, main differences being that bullets are not vertical lines and the star background doesn't scroll.

LEVELS: 5

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Romset: 27 kb / 14 files / 15.1 zip

history

Explorer (c) 1981 Sidam.

- TECHNICAL -

Main CPU : Z80 (@ 3.072 Mhz)

Sound CPU : Z80 (@ 1.78975 Mhz)

Sound Chips : (2x) AY8910 (@ 1.78975 Mhz)

Screen orientation : Vertical

Video resolution : 224 x 256 pixels

Screen refresh : 60.61 Hz

Palette colors : 99

Players : 1

Control : 8-way joystick

Buttons : 2

- TRIVIA -

This game is a bootleg of "Scramble".

- SOURCES -

Game's rom.

Machine's picture.

Edit this entry at Arcade-History.com: http://www.arcade-history.com/?n=explorer&page=detail&id=777&o=2

resource links

cheats

code	comments
00000000:4002:00000063:FFFFFFFF	Infinite Credits
00000000:4108:00000005:FFFFFFFF	Infinite Lives
00000000:4105:000000FF:FFFFFFFF	Infinite Fuel
20800000:2047:000000C9:FFFFFFFF	Invincibility
20810000:2113:000000C9:FFFFFFFF	Invincibility (2/2)
00000301:411E:00000005:FFFFFFFF	Select current level:Level 6 = Base
00000303:411E:00000005:FFFFFFFF	Select next level:Level 6 = Base