Mighty Monkey (U.Games bootleg)

EMU Infos
dumper	f205v
date	03/04/2020
emulator	MAME 0.221
dev	Osso

PCB Infos
name	mimonkeyug on Arcade Database
description	Mighty Monkey (U.Games bootleg)
year	1983
manufacturer	U.Games

Technical references

CPUs

QTY	Type	clock	position	function
1x	Z80		8b	8-bit Microprocessor - main
1x	LM324	-	8u	Quad Operational Amplifier - sound
1x	LM380	-	10u	Audio Amplifier - sound
1x	oscillator	18.432	1f

ROMs

QTY	Type	position	status
1x	TMS2516	9	dumped
12x	TMS2532	1-8,10-13	dumped
1x	N74S288N	6l	dumped

RAMs

QTY	Type	position
5x	SN74S201N	1n,1p,1r,1s,1t
1x	AM9101DPC	4f
1x	MWS5101DL3	5f
2x	TMS4014JDL	3f,3h
4x	2114UCE	8n,8p

PLDs

QTY	Type	position	status
0x

Others

1x 22x2 edge connector
1x trimmer (volume)(10r)
1x 8 DIP switches bank (11b)

Notes

PCB is marked: "UG" on component side
There are a number of hand made modifications:
most notably the 12x EPROMs TMS2532 are stacked in 6x pairs by 2x EPROMs each, one on top of the other.
Pairs are: 1-5, 2-6, 3-7, 4-8, 10-11, 12-13
All the pairs have pin 20 of the bottom EPROM connected with tiny wires to some TTLs as per following table:

Pair  -> TTL       (pin)(location)
1-5   -> SN74LS139 (12)  (7b)
2-6   -> SN74LS139 (11)  (7b)
3-7   -> SN74LS139 (10)  (7b)
4-8   -> SN74LS139 (09)  (7b)
10-11 -> SN74SL00N (09)  (2s)
12-13 -> SN74SL00N (09)  (2s)

Also, 4x RAMs 2114UCE are stacked in 2x pairs by 2x RAMs each, one on top of the other.
All pairs have pin 8 of the top RAM bent out and connected with tiny wires to some TTLs as per following table:

Pair  -> TTL       (pin)(location)
1-2   -> unmarked  (08)  (8l)
3-4   -> unmarked  (08)  (8l)
The TTL @8l is made of 2x unmarked TTLs, stacked one on top of the other.