TS-7250-V3 PC104 Header

The PC104 connector consists of four rows of pins labelled A-D. The PC104 standard implements an ISA bus over these headers, but we also include the ability for almost all of the pins to be used as DIO.

Pin	Name	GPIO		Pin	Name	GPIO		Pin	Name	GPIO		Pin	Name	GPIO
B32	GND	N/A		A32	GND	N/A
B31	GND	N/A		A31	ISA_ADD_00	N/A
B30	ISA_14_3_MHZ	N/A		A30	ISA_ADD_01	N/A
B29	5V	N/A		A29	ISA_ADD_02	N/A
B28	ISA_BALE	Bank 6 IO 1		A28	ISA_ADD_03	N/A		C19	GND	N/A		D19	GND	N/A
B27	ISA_TC	Bank 6 IO 2		A27	ISA_ADD_04	N/A		C18	ISA_DAT_15	N/A		D18	GND	N/A
B26	ISA_DACK2	Bank 6 IO 10		A26	ISA_ADD_05	N/A		C17	ISA_DAT_14	N/A		D17	Unused	N/A
B25	ISA_IRQ3	N/A		A25	ISA_ADD_06	N/A		C16	ISA_DAT_13	N/A		D16	+5V	N/A
B24	GND	N/A		A24	ISA_ADD_07	N/A		C15	ISA_DAT_12	N/A		D15	ISA_DRQ7	101
B23	ISA_IRQ5	14		A23	ISA_ADD_08	49		C14	ISA_DAT_11	36		D14	ISA_DACK7	100
B22	ISA_IRQ6	15		A22	ISA_ADD_09	50		C13	ISA_DAT_10	35		D13	ISA_DRQ6	99
B21	ISA_IRQ7	16		A21	ISA_ADD_10	51		C12	ISA_DAT_09	34		D12	ISA_DACK6	98
B20	ISA_BCLK	21		A20	ISA_ADD_11	52		C11	ISA_DAT_08	33		D11	ISA_DRQ5	97
B19	ISA_REFRESH	8		A19	ISA_ADD_12	53		C10	Unused	N/A		D10	ISA_DACK5	96
B18	ISA_DRQ1	19		A18	ISA_ADD_13	54		C09	Unused	N/A		D09	ISA_DRQ0	95
B17	ISA_DACK1	18		A17	ISA_ADD_14	55		C08	Unused	N/A		D08	ISA_DACK0	94
B16	ISA_DRQ3	11		A16	ISA_ADD_15	56		C07	Unused	N/A		D07	ISA_IRQ14	93
B15	ISA_DACK3	13		A15	ISA_ADD_16	57		C06	Unused	N/A		D06	ISA_IRQ15	92
B14	ISA_IOR	0		A14	ISA_ADD_17	58		C05	N/A	Unused		D05	ISA_IRQ12	91
B13	ISA_IOW	1		A13	ISA_ADD_18	59		C04	Unused	N/A		D04	ISA_IRQ11	90
B12	ISA_MEMR	3		A12	ISA_ADD_19	60		C03	Unused	N/A		D03	ISA_IRQ10	89
B11	ISA_MEMW	2		A11	ISA_AEN	7		C02	Unused	N/A		D02	ISA_IO16	88
B10	GND	N/A		A10	ISA_IORDY	10		C01	Unused	N/A		D01	ISA_MEM16	87
B09	Unused	N/A		A09	ISA_DAT_00	25		C00	GND	N/A		D00	GND	N/A
B08	ISA_ENDX	6		A08	ISA_DAT_01	26
B07	Unused	N/A		A07	ISA_DAT_03	28
B06	ISA_DRQ2	12		A06	ISA_DAT_04	29
B05	3.3V	N/A		A05	ISA_DAT_05	30
B04	ISA_IRQ9	17		A04	ISA_DAT_02	27
B03	Unused	N/A		A03	ISA_DAT_06	31
B02	ISA_RESET	4		A02	ISA_DAT_07	32
B01	GND	N/A		A01	ISA_IOCHK	9