DTL H2000 hardware reverse engineering

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. Note that most of these signals won't go directly to their respective devices, but instead will go over level translators. These will be noted 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
				36
				37
				38
				39
GND				40
				41
				42
				43
				44
GND				45
				46
				47
				48
				49
GND				50
				51
				52
				53
				54
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