unknown 'Space Invaders' gambling game (encrypted, set 1)

Game Information
manufacturer <unknown>
year 199?
cloned by unksiga unksigb
genre N/A
downloads 48
Screenshots
unksig title
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Download Details
split set unksig.zip 12.33k
merged set unksig.7z 13.43k
standalone set unksig.7z 9.59k
Driver Details
source misc/4enraya.cpp
status good
emulation good
savestate supported
Screen Details
display screen
type raster
orientation horizontal
width 256px
height 224px
refresh 60mhz
Input Details
player 1
type joy
buttons 1
directions 8
Chipset Details
name Zilog Z80
clock 3.81mhz
name Speaker
clock N/A
name AY-3-8910A PSG
clock 1.91mhz
ROM Details
name size crc
i.bin 32.00k 902efc27
ii.bin 32.00k 855c1ea3
r.bin 32.00k f8a358fe
b.bin 32.00k 56ac5874
v.bin 32.00k 4c5a7e43