unixpc expansion bus pinouts

[C M Votava]

Here are the unixpc expansion bus pinouts, as far as I can tell from
information I have at hand. If there are any corrections, please send
them to [att!]ihlpm!cmv



2/25/89
		Unixpc Expansion Bus Pinouts

Bus		
Connector	Sheet
Number		Number	Symbol		Description
========================================================================
JX-1		21			Digital Ground
JX-2		21			+5v
JX-3		21			Analog Ground
JX-4		22	XI/OEN+		Expansion I/O Enable
JX-5		22			Audio From Tape
JX-6		17	XPERR		Expansion Parity Error
JX-7		22			Audio From Phone Line
JX-8		21			Digital Ground
JX-9		21			Digital Ground
JX-10		22	INT01*		Interrupt 1
JX-11		22			Audio To Phone Line
JX-12		22	INT05*		Interrupt 5
JX-13		21			Digital Ground
JX-14		21			+5v
JX-15		22	XPCK+		Expansion Processor Clock
JX-16		21			+12v
JX-17		21			Digital Ground
JX-18		21			+12v
JX-19		22	X20MCK+		?? Expansion Modem Clock ??
JX-20		21	XLDS		Expansion Lower Data Strobe
JX-21		21			Digital Ground
JX-22		21			-12v
JX-23		22	XMEN+		Expansion Memory
JX-24		21	XUDS		Expansion Upper Data Strobe
JX-25		22	XENRAS*		Expansion Enable Row Address Strobe
JX-26		21	XR/W		Expansion Read/Write
JX-27		22	SPARE0		Spare
JX-28		22	XRST*		Expansion Reset
JX-29		21			Digital Ground
JX-30		21			+5v
JX-31		21			+5v
JX-32		22	RFBG*		Refresh Bus Grant
JX-33		22	EXP1BG*		Expansion Board 1 Bus Grant
JX-34		22	EXP2BG*		Expansion Board 2 Bus Grant
JX-35		22	EXP0BG*		Expansion Board 0 Bus Grant
JX-36		21			Digital Ground
JX-37		22	EXP2RQ*		Expansion Board 2 Bus Request
JX-38		22	SPARE1		Spare
JX-39		22	EXP0RQ*		Expansion Board 0 Bus Request
JX-40		22	EXP1RQ*		Expansion Board 1 Bus Request
JX-41		21			+5v
JX-42		21	XD15		Expansion Data Bus
JX-43		21			Digital Ground
JX-44		21	XD14		Expansion Data Bus
JX-45		21	XD13		Expansion Data Bus
JX-46		21	XD12		Expansion Data Bus
JX-47		21	XD11		Expansion Data Bus
JX-48		21	XD10		Expansion Data Bus
JX-49		21	XD09		Expansion Data Bus
JX-50		21			Digital Ground
JX-51		21	XD07		Expansion Data Bus
JX-52		21	XD08		Expansion Data Bus
JX-53		21	XD05		Expansion Data Bus
JX-54		21	XD06		Expansion Data Bus
JX-55		21	XD03		Expansion Data Bus
JX-56		21	XD04		Expansion Data Bus
JX-57		21			Digital Ground
JX-58		21			+5v
JX-59		21	XD02		Expansion Data Bus
JX-60		21	XD01		Expansion Data Bus
JX-61		21	XD00		Expansion Data Bus
JX-62		22	XMA20		Expansion Mapped Address Bits
JX-63		22	XMA19		Expansion Mapped Address Bits
JX-64		21			Digital Ground
JX-65		22	XMA18		Expansion Mapped Address Bits
JX-66		22	XMA17		Expansion Mapped Address Bits
JX-67		22	XMA16		Expansion Mapped Address Bits
JX-68		22	XMA15		Expansion Mapped Address Bits
JX-69		21			+5v
JX-70		22	XMA14		Expansion Mapped Address Bits
JX-71		21			Digital Ground
JX-72		22	XMA13		Expansion Mapped Address Bits
JX-73		22	XMA12		Expansion Mapped Address Bits
JX-74		21	XA21		Expansion Address Bus
JX-75		21	XA20		Expansion Address Bus
JX-76		21	XA19		Expansion Address Bus
JX-77		21	XA18		Expansion Address Bus
JX-78		21			Digital Ground
JX-79		21	XA17		Expansion Address Bus
JX-80		21	XA16		Expansion Address Bus
JX-81		21	XA15		Expansion Address Bus
JX-82		21	XA14		Expansion Address Bus
JX-83		21	XA13		Expansion Address Bus
JX-84		21	XA12		Expansion Address Bus
JX-85		21			Digital Ground
JX-86		21			+5v
JX-87		21	XA11		Expansion Address Bus
JX-88		21	XA10		Expansion Address Bus
JX-89		21	XA09		Expansion Address Bus
JX-90		21	XA08		Expansion Address Bus
JX-91		21	XA07		Expansion Address Bus
JX-92		21			Digital Ground
JX-93		22	XBP+		Expansion Bus Parity Result
JX-94		21	XA02		Expansion Address Bus
JX-95		21	XA03		Expansion Address Bus
JX-96		21	XA04		Expansion Address Bus
JX-97		21	XA03		Expansion Address Bus
JX-98		21	XA02		Expansion Address Bus
JX-99		21			Digital Ground
JX-100		21	XA01		Expansion Address Bus

-Craig Votava

[att!]ihlpm!cmv