DTL H2000 hardware reverse engineering

100 pins bridge

On the DTL-H2000, the SBUS of the PlayStation has several buffers and level translators, unlike the retail hardware. Tracing through it is therefore a bit more difficult.

The most important piece of information however is probably the pinout of the 100 pins bridge over the two cards. It contains all of the SBUS signals, and more. Note that most of these signals won't go directly to their respective devices, but instead will go over level translators and buffers. The buffers will usually force the signal direction in a certain way only, and this will be described when applicable in the table below.

signal	CPU tr pin	translator	br tr pin	br pin	br tr pin	translator	PIO tr pin
GND				1
GND				2
				3
				4
				5
				6
				7
				8
				9
GND				10
				11
				12
				13
				14
GND				15
				16
				17
				18
				19
GND				20
				21
				22
				23
				24
GND				25
				26
				27
				28
				29
GND				30
				31
				32
				33
				34
				35
D15				36	p47	U732	p2
D14				37	p46	U732	p3
D13				38	p44	U732	p5
D12				39	p43	U732	p6
GND				40
D11				41	p41	U732	p8
D10				42	p40	U732	p9
D9				43	p38	U732	p11
D8				44	p37	U732	p12
GND				45
D7				46	p36	U732	p13
D6				47	p35	U732	p14
D5				48	p33	U732	p16
D4				49	p32	U732	p17
GND				50
D3				51	p30	U732	p19
D2				52	p29	U732	p20
D1				53	p27	U732	p22
D0				54	p26	U732	p23
GND				55
				56
				57
				58
GND				59
				60
				61
				62
				63
				64
				65
				66
!RESET	11 (2Y3)	U65	38 (2A3)	<--67--	8 (2Y1)	U737	41 (2A1)
				68
GND				69
				70
				71
				72
				73
				74
				75
				76
				77
GND				78
				79
GND				80
				81
				82
				83
GND				84
				85
				86
				87
GND				88
				89
GND				90
				91
				92
				93
				94
				95
				96
				97
				98
GND				99
GND				100