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
A23(?)				6
A22(?)				7
A21(?)				8
A20(?)				9
GND				10
A19(?)				11
A18(?)				12
A17				13
A16				14
GND				15
A15				16
A14				17
A13				18
A12				19
GND				20
A11				21
A10				22
A9				23
A8				24
GND				25
A7(?)				26
A6				27
A5				28
A4				29
GND				30
A3				31
A2				32
A1				33
A0				34		U65	13
				35
D15				36	47 (1A1)	U732	2 (1B1)
D14				37	46 (1A2)	U732	3 (1B2)
D13				38	44 (1A3)	U732	5 (1B3)
D12				39	43 (1A4)	U732	6 (1B4)
GND				40
D11				41	41 (1A5)	U732	8 (1B5)
D10				42	40 (1A6)	U732	9 (1B6)
D9				43	38 (1A7)	U732	11 (1B7)
D8				44	37 (1A8)	U732	12 (1B8)
GND				45
D7				46	36 (2A1)	U732	13 (2B1)
D6				47	35 (2A2)	U732	14 (2B2)
D5				48	33 (2A3)	U732	16 (2B3)
D4				49	32 (2A4)	U732	17 (2B4)
GND				50
D3				51	30 (2A5)	U732	19 (2B5)
D2				52	29 (2A6)	U732	20 (2B6)
D1				53	27 (2A7)	U732	22 (2B7)
D0				54	26 (2A8)	U732	23 (2B8)
					47	U64	2
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