(WIP) Dox: Future Flash - 模擬器

2016.12.18

Finally, after 5 years - a real update :)

18.12.2016. - Future Flash / Laser Base.

What's Future Flas (or Laser Base)? It's an arcade game, similar (at first
look) to Missile Command. The real gameplay is (or rather - was ) unknown.
There's only one screenshot from the game - taken form the official flyer:

http://www.slanina.pl/images/ff/flyer.png

Soooo, 'planet of the apes' meets 'star wars' ;) ? More info here

There are two versions of the game - Laser Base (1980 - Hoei Int) and Future
Flash (1981 - Amstar/Hoei). Amstar mainly licensed games from overseas and
imported into the USA. Hoei only became Coreland and began making their own
games a little bit later, but Future Flash was made in their era of rip offs.
So, who was the actual developer of the game? I have no idea...

I've got the FF (broken) PCB a couple of years ago. The hardware is a bit
complicated: 4 MHz 8 bit CPU (Z-80), framebuffer based video hardware (two
256x256 4bpp layers) driven by common HD46505R CRT and overcomplicated sound
hardware ( two 8253 clock generators, and over 150 other parts (op-amps,
reverb buffer, noise generators, tons of capacitors and resistors)). Game is
controlled with trackbal and single button. There's also game manual with
partial (missing the sound section....) and buggy schematics avaialble.

I wrote a basic emulation driver, but found a blocker - protection device.
There's a custom chip marked "Z1". Game wasn't playable at all. Was crashing
soon after boot. Protection wasn't just a simple check at game start, like in
some games from '80s. Z1 device was was mapped into memory range like a
common RAM chip and accesses very often. I've removed Z1 fro the board and
sent to someone for decapping. But it got lost... Nothign happened for a
couple of years then...

Few weeks ago Morten Shearman Kirkegaard, Samuel Neves and Peter Wilhelmsen
made an awesome step forward. They bought another (also broken...) board and
cracked the Z1 protection - ended up with an algorithm that can be
represented using a bunch of MUX2 gates taking entropy based on the past 4
read offsets (40-bits state). It took about a week. After that, i started to
improve the emulation driver. Fixed controlls, interrupts, added very
preliminary audio (only the 8253 clocks are emulated). Here's a video from
the MAME - attract mode (notice the special level - space tunnel made of
dots) and start of gameplay. Emulation is far form perfection. There are gfx
glitches, weird colors and lacks of most of the sound effects. There's no
reference video - no one knows how the game should looks like.

https://www.youtube.com/watch?v=sYVVTqN3GWs

http://www.slanina.pl/images/ff/pcb.jpg

Future Flash PCB set: XBC-101-00-1 - CPU board and XBC-102-01-1 - Video board
(courtesy of Peter Wilhelmsen)

http://www.slanina.pl/images/ff/crack.jpg

Arduino Mega plays with the Z1 device ;)
(courtesy of Peter Wilhelmsen)

http://www.slanina.pl/images/ff/ff0.png
http://www.slanina.pl/images/ff/ff1.png
http://www.slanina.pl/images/ff/ff3.png
http://www.slanina.pl/images/ff/ff2.png

http://www.slanina.pl/images/ff/lb0.png
http://www.slanina.pl/images/ff/lb1.png
http://www.slanina.pl/images/ff/lb2.png
http://www.slanina.pl/images/ff/lb3.png
Laser Base (set 1) - notice the energy bar on top, instead bottom (like in
FF), and the colors - wrong or changed intentionally?

http://www.slanina.pl/images/ff/lba.png
Laser Base (set 2) - energy bar at the bottom of screen.

http://www.slanina.pl/index.html

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ポーラステーション
http://perry0517a.blogspot.tw/

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