Gone Fishin II by IGS

.u13	27c4000		stickered	G F II
					S P

.u17	27c160		stickered	G F II
					C G

.u15	27c4002		stickered	G F II
					TEXT

.u12	27c4002		stickered	G F II
					V-904USO

.u26	atf22v10c	stickered	FW U26	
	would always read the same checksum but would always fail a verify @ address 5866(16EAh)

.log	capture using trojan firmware and putty software.

Mame .280
C:\Siftware\roms>c:\games\mame_command\mame -romident c:\siftware\roms\gf2\roms 
Identifying c:\siftware\roms\gf2\roms....
gf2.u12              = gfii_v-904uso.u12     gonefsh2    Gone Fishing 2
gf2.u13              = gfii_sp.u13           gonefsh2    Gone Fishing 2
gf2.u15              = gfii_text.u15         gonefsh2    Gone Fishing 2
gf2.u17              = gfii_cg.u17           gonefsh2    Gone Fishing 2
gf2.u26              NO MATCH
gf2_putty.log        NO MATCH