Bank robbery? by Blitz System Inc.

Main board silkscreened on top

A32-93
Copyright 1991 Blitz System inc.
Model: DK-B LEV-2 REV-B
Made in CANADA

Bottom of main board
Stickered	LV-02463

Silkscreened on top
A34-93
Copyright 1992, Blitz System inc.
Made in CANADA
MODEL-8L74
CODE:AA1

Stickered	LVI-02463

.a	27c010	stickered	BANK 1.23-A
.b	27c010	stickered	BANK 1.23-B
.c	27c040	stickered	BANK-C
.d	27c040	stickered	BANK-D 
.e	27c4001	stickered	BANK-E
.g	27c040	stickered	BANK-G
.u71	PAL16V8H	

Main board
U2 	68hc705c8p	stickered	C8-BANK	failed to read
U43	PAL20X8A	Read all 0's
U48	PAL20X8A	Read all 0's
U52	PAL20X8A	Read all 0's
U12	PAL20X10A	Read all 0's
U40	PAL20X10A	Read all 0's

Sound board
U18 on sound board is a 68hc705c8p	stickered	8L6(74)-4.01	failed to read

C:\games\mame_command>mame64 -romident c:\siftware\roms\bank\roms\bank.a 
Identifying c:\siftware\roms\bank\roms\bank.a....
bank.a              NO MATCH

C:\games\mame_command>mame64 -romident c:\siftware\roms\bank\roms\bank.b 
Identifying c:\siftware\roms\bank\roms\bank.b....
bank.b              NO MATCH

C:\games\mame_command>mame64 -romident c:\siftware\roms\bank\roms\bank.c 
Identifying c:\siftware\roms\bank\roms\bank.c....
bank.c              NO MATCH

C:\games\mame_command>mame64 -romident c:\siftware\roms\bank\roms\bank.d 
Identifying c:\siftware\roms\bank\roms\bank.d....
bank.d              NO MATCH

C:\games\mame_command>mame64 -romident c:\siftware\roms\bank\roms\bank.e 
Identifying c:\siftware\roms\bank\roms\bank.e....
bank.e              NO MATCH

C:\games\mame_command>mame64 -romident c:\siftware\roms\bank\roms\bank.g 
Identifying c:\siftware\roms\bank\roms\bank.g....
bank.g              NO MATCH

C:\games\mame_command>mame64 -romident c:\siftware\roms\bank\roms\bank.u71 
Identifying c:\siftware\roms\bank\roms\bank.u71....
bank.u71            NO MATCH