EMU Infos
dumper	Tirino73
dump date	14/07/2009
emulator	MAME 0.133
dev	Tirino73, David Haywood

PCB Infos
name	backfirt
description	Back Fire (Tecmo, bootleg)
year	1988
manufacturer	Tecmo

Technical references

CPUs

QTY	Type	clock	function
1x	Z80A		8-bit Microprocessor - main
1x	Z80A		8-bit Microprocessor - sound (*)
1x	YM3812		FM Operator Type-L II (OPL II) - sound
1x	YM3014		D/A Converter (DAC) - sound
1x	oscillator	24 MHz
1x	oscillator	8 MHz

ROMs

QTY	Type	position	status
2x	27256	B2, B3	dumped
14x	27512	B4 - B17	dumped

RAMs

QTY	Type	position
1x	6264	main on CPU board
1x	6116	sound on sub board
1x	6116	sound on CPU board
3x	2114	sound on sub board
3x	6116	sound on video board
20x	4164	main on video board

PLDs

QTY	Type	position	status

Others

Notes

This japanese romset comes from a bootleg pcb.Rare than the original.
* Note:The sound cpu was protected inside a epoxy block fit on a 40 pin socket in reverse of cpu board (solder side).By dissolving resin the small sub pcb contains Z80A (identified by pins),76c28 (6116),a 74ls00 and 74ls138.

-Controls:
This game uses 8way joystick and one button (shot).Hardware accept inputs by other two buttons as the jamma standard,but their function is the same of first one.

-Dip switch settings:

DIP 1
SW 1-2 coin slot 1 (max 9 credits)
off off 1 coin 1 play
on  off 1 coin 2 play
off on  1 coin 3 play
on  on  1 coin 6 play
SW 3-4 coin slot 2 (max 99 credits)
off off 1 coin 1 play
on  off 2 coin 1 play
off on  1 coin 2 play
on  on  1 coin 3 play
SW 7 table-upright
off table
on  upright
SW 5-6-8 not used
DIP 2
SW 1-2-3 extend
off off off 50,200,500k
on  off off 100,300,800k
off on  off 50,200k
on  on  off 100,300k
off off on 50k
on  off on 100k
off on  on 200k
on  on  on nothing
SW 4-5-6 difficulty
off off off normal
on  off off  hard 1
off on  off    |
on  on  off    |
off off on     |
on  off on     |
off on  on     |
on  on  on   hardest
SW 7 continue
off yes
on  no
SW 8 invincibility (test mode)** see note
off no -normal game
on  yes

** It is not total, in normal waves you die by collision with bosses shot,and with walls and enemies in cavern waves and final base. In normal waves,you cannot get special weapon objects too.
Demo sound is always active by default.Dip switch are good by testing.
Dip switch changes apart for coin settings are immediately effective (by next play and during play),no need of turn off/on power.