IBM 770 manual System Board, Type, Signal Name

Pin	Type	Signal Name		Pin	Type	Signal Name
121	C	-DOCK_ID1		181	C	-DOCK_ID2
122	P	IRQSER		182	G	GND
123	G	GND		183	U	USBP1-
124	T	IRQ5		184	U	UDBP1+
125	T	IRQ7		185	R	Reserved
126	T	IRQ10		186	G	GND
127	T	IRQ11		187	C	12C_DATA
128	T	IRQ14		188	J	JBCY
129	G	GND		189	J	JBCX
130	P	-INTB		190	J	JBB2
131	P	-INTC		191	G	GND
132	P	-INTD		192	J	JBB1
133	I	-DASP		193	J	MIDIOUT
134	G	GND		194	J	MIDIIN
135	V	CRTID0		195	C	-PWRSWITCH
136	V	CDTID2		196	G	GND
137	V	DDCCLK_ID3		197	C	-BUSSUSSTAT
138	V	CRT_RED		198	M	-PCMCIA_RI
139	G	GND		199	F	-SIDE1SEL
140	L	SLCT		200	G	GND
141	L	PE		201	F	DRATE0
142	L	BUSY		202	F	-WREN
143	L	D7		203	F	-DRVID1
144	G	GND		204	F	-DIR
145	L	D3		205	G	GND
146	L	D2		206	F	-MOTEN1
147	L	D1		207	F	-DISKCHG
148	L	D0		208	F	-INDEX
149	L	AFD		209	F	-RDDATA
150	G	GND		210	G	GND
151	G	GND		211	G	GND
152	L	-ERR		212	L	-STB
153	F	-WRDATA		213	L	-INIT
154	G	GND		214	L	-SLIN
155	F	DRVSEL1		215	G	GND
156	F	-DRVID0		216	L	D4
157	F	-MEDID0		217	L	D5
158	F	DRATE1		218	L	D6
159	G	GND		219	L	-ACK
160	F	-STEP		220	G	GND
161	F	-MEDID1		221	V	CRT_GREEN
162	F	-TRACK0		222	G	GND
163	F	-WPROTECT		223	V	CRT_BLUE
164	G	GND		224	V	DDCDATA_ID1
165	C	-PWRON		225	V	VSYNC
166	C	POWERGOOD		226	V	HSYNC
167	C	UNI_SMI		227	G	GND
168	M	SPKR		228	I	-PHLDA
169	G	GND		229	I	-PHLD
170	J	JAB1		230	G	GND
171	J	JAB2		231	P	-INTA
172	J	JACX		232	I	IDE2IRQ
173	J	JACY		233	T	IRQ15
174	G	GND		234	T	IRQ12
175	C	I2C_CLK		235	T	IRQ9
176	C	SUSCLK		236	T	IRQ6
177	R	Reserved		237	T	IRQ4
178	U	USB_OC1		238	T	IRQ3
179	G	GND		239	G	GND
180	C	-DOCK_ID3		240	C	-DOCK_ID0
Figure	2-7. 240-Pin External		Bus Connector			Pin Assignments

System Board 2-11