Tetris (bootleg set 3)

EMU Infos
dumper	f205v
date	06/11/2010
emulator	MAME 0.156
dev	Osso

PCB Infos
name	atetrisb3 on ProgettoEMMA atetrisb3 on Arcade Database
description	Tetris (bootleg set 3)
year	1988
manufacturer

Technical references

CPUs

QTY	Type	clock	position	function
1x	SY6502	MHz	1st PCB	8-bit Microprocessor - main
3x	SN76489AN	MHz	1st PCB	Digital Complex Sound Generator - sound

1x	UM6502A	MHz	2nd PCB	8-bit Microprocessor - main
4x	SN76489AN	MHz	2nd PCB	Digital Complex Sound Generator - sound

1x	P8749H	MHz	both PCBs PCB	8-bit Microcontroller - main (internal ROM dumped)
1x	oscillator	4.000	both PCBs 40
1x	oscillator	10.000MHz	both PCBs 107
1x	oscillator	14.31818MHz	both PCBs 143

ROMs

QTY	Type	position	status
1x	KM28C16	both PCBs ROM B	dumped
2x	27C512	both PCBs ROM A, ROM C	dumped

1x	Am27S19P	1st PCB	dumped

1x	N82S123N	2nd PCB	dumped

RAMs

QTY	Type	position
1x	HM6264LP-15	1st PCB
1x	UM6116K-2	1st PCB

1x	KM6264AL-10	2nd PCB
1x	V61C16S55L	2nd PCB

PLDs

QTY	Type	position	status
2x	GAL18V8A-25LP	1st PCB	read protected
2x	PALCE18V8H-25PC/4	1st PCB	read protected
2x	PAL16R4B-2CN	1st PCB	read protected

6x	PAL18l8ACN	2nd PCB	read protected

Others

1x 28x2 JAMMA edge connector
1x trimmer (volume)
1x 4 DIP switches bank (1st PCB)
1x 5 DIP switches bank (2nd PCB)

Notes

PCB is marked: "RC-1108" on component side
PCB is labeled: "R.K" on component side

update 20141226: better description of CHIPs.

update 20180311: found a second PCB for the same game. Slightly more complex hardware (1x additional SN76489SN, 1x additional DIP switch, a few more TTLs), but the game is identical. Dumped the PROMs.