manual-10

PCI BUS MULTIPLE 8255/8254 ADAPTER
OPERATION MANUAL

INTRODUCTION

The PCI bus multi-8255/8254 adapter is a 32 bits PCI bus adapter with Plug and Play (PnP) features, it is a programmable I/O interface for PC/486, Pentium or compatible computers. The PnP features let hardware configuration for IRQ and I/O address is detected by BIOS automatically, you don't need set switch and jumper.

The PCI bus multi-8255/8254 adapter provides total 24 digital I/O ports, each I/O port contains 8 I/O lines, and can be set either input or output by the user's program. Two 8254 on board chips provides six programmable interval timer/counter.

HARDWARE INSTALLATION

Your PCI bus multi-8255/8254 adapter is designed to be inserted in any available PCI slot in your PC/486, Pentium or compatibles. In order to gain access to the expansion slots, follow the steps listed below:

1.	Turn off all power to your computer and all peripheral devices before installing your multi-8255/8254 adapter.
2.	Remove the cover of the computer.
3.	Insert the multi-8255/8254 adapter into any available PCI slot. Make sure the adapter is firmly seated in the chosen slot.
4.	Replace the cover of the computer.
5.	Connects the expansion cables.
6.	Turn on the power of your computer, the PnP features will recognize the multi-8255/8254 adapter.

HARDWARE CONFIGURATION

1 I/O Port Address

Base + 0 : Port 1A input/output buffer.

Base + 1 : Port 1B input/output buffer.

Base + 2 : Port 1C input/output buffer.

Base + 3 : Port 1 control register.

Base + 4 : Port 2A input/output buffer.

Base + 5 : Port 2B input/output buffer.

Base + 6 : Port 2C input/output buffer.

Base + 7 : Port 2 control register.

Base + 8 : Port 3A input/output buffer.

Base + 9 : Port 3B input/output buffer.

Base + 10 : Port 3C input/output buffer.

Base + 11 : Port 3 control register.

Base + 12 : Port 4A input/output buffer.

Base + 13 : Port 4B input/output buffer.

Base + 14 : Port 4C input/output buffer.

Base + 15 : Port 4 control register.

Base + 16 : Port 5A input/output buffer.

Base + 17 : Port 5B input/output buffer.

Base + 18 : Port 5C input/output buffer.

Base + 19 : Port 5 control register.

Base + 20 : Port 6A input/output buffer.

Base + 21 : Port 6B input/output buffer.

Base + 22 : Port 6C input/output buffer.

Base + 23 : Port 6 control register.

Base + 24 : Port 7A input/output buffer.

Base + 25 : Port 7B input/output buffer.

Base + 26 : Port 7C input/output buffer.

Base + 27 : Port 7 control register.

Base + 28 : Port 8A input/output buffer.

Base + 29 : Port 8B input/output buffer.

Base + 30 : Port 8C input/output buffer.

Base + 31 : Port 8 control register.

Base + 32 : Counter 0 input/output buffer.

Base + 33 : Counter 1 input/output buffer.

Base + 34 : Counter 2 input/output buffer.

Base + 35 : Counter control register for counter 0,1,2.

Base + 36 : Counter 3 input/output buffer.

Base + 37 : Counter 4 input/output buffer.

Base + 38 : Counter 5 input/output buffer.

Base + 39 : Counter control register for counter 3,4,5.

2 DIP Switch

The switch is used to identify card number, default setting is card 15. There are two methods to set the card number:

a. PnP mode

Just plug in PCI bus adapter into PCI slot, the PCI BIOS will allocate I/O address to each adapter automatically and assign card number start from 0 to each adapter. You may set any card number at PnP mode, and you need use software tools to distinguish port id. Almost all of the operating systems run at PnP mode.

b. manual mode

Set card number by card identifier switch, the PCI BIOS will assign pre-allocated I/O address to each adapter. Please set different card number to each adapter (do not duplicate card number setting).

The card number starts from 0 to 15.

Pin Assignments

The signals are assigned in the DB40 and DB50 connector, its pin assignments are show in the below.

1. DB50 Connector Pin Assignments (CN1)

Pin	Function	Pin	Function
1	P1A1	2	P1A0
3	P1A3	4	P1A2
5	P1A5	6	P1A4
7	P1A7	8	P1A6
9	P1B1	10	P1B0
11	P1B3	12	P1B2
13	P1B5	14	P1B4
15	P1B7	16	P1B6
17	P1C1	10	P1C0
19	P1C3	12	P1C2
21	P1C5	14	P1C4
23	P1C7	16	P1C6
25	GND	26	GND
27	P2A1	28	P2A0
29	P2A3	30	P2A2
31	P2A5	32	P2A4
33	P2A7	34	P2A6
35	P2B1	36	P2B0
37	P2B3	38	P2B2
39	P2B5	40	P2B4
41	P2B7	42	P2B6
43	P2C1	44	P2C0
45	P2C3	46	P2C2
46	P2C5	48	P2C4
49	P2C7	50	P2C6

1. DB50 Connector Pin Assignments (CN2)

Pin	Function	Pin	Function
1	P3A1	2	P3A0
3	P3A3	4	P3A2
5	P3A5	6	P3A4
7	P3A7	8	P3A6
9	P3B1	10	P3B0
11	P3B3	12	P3B2
13	P3B5	14	P3B4
15	P3B7	16	P3B6
17	P3C1	10	P3C0
19	P3C3	12	P3C2
21	P3C5	14	P3C4
23	P3C7	16	P3C6
25	GND	26	GND
27	P4A1	28	P4A0
29	P4A3	30	P4A2
31	P4A5	32	P4A4
33	P4A7	34	P4A6
35	P4B1	36	P4B0
37	P4B3	38	P4B2
39	P4B5	40	P4B4
41	P4B7	42	P4B6
43	P4C1	44	P4C0
45	P4C3	46	P4C2
46	P4C5	48	P4C4
49	P4C7	50	P4C6

1. DB50 Connector Pin Assignments (CN3)

Pin	Function	Pin	Function
1	P5A1	2	P5A0
3	P5A3	4	P5A2
5	P5A5	6	P5A4
7	P5A7	8	P5A6
9	P5B1	10	P5B0
11	P5B3	12	P5B2
13	P5B5	14	P5B4
15	P5B7	16	P5B6
17	P5C1	10	P5C0
19	P5C3	12	P5C2
21	P5C5	14	P5C4
23	P5C7	16	P5C6
25	GND	26	GND
27	P6A1	28	P6A0
29	P6A3	30	P6A2
31	P6A5	32	P6A4
33	P6A7	34	P6A6
35	P6B1	36	P6B0
37	P6B3	38	P6B2
39	P6B5	40	P6B4
41	P6B7	42	P6B6
43	P6C1	44	P6C0
45	P6C3	46	P6C2
46	P6C5	48	P6C4
49	P6C7	50	P6C6

1. DB50 Connector Pin Assignments (CN4)

Pin	Function	Pin	Function
1	P7A1	2	P7A0
3	P7A3	4	P7A2
5	P7A5	6	P7A4
7	P7A7	8	P7A6
9	P7B1	10	P7B0
11	P7B3	12	P7B2
13	P7B5	14	P7B4
15	P7B7	16	P7B6
17	P7C1	10	P7C0
19	P7C3	12	P7C2
21	P7C5	14	P7C4
23	P7C7	16	P7C6
25	GND	26	GND
27	P8A1	28	P8A0
29	P8A3	30	P8A2
31	P8A5	32	P8A4
33	P8A7	34	P8A6
35	P8B1	36	P8B0
37	P8B3	38	P8B2
39	P8B5	40	P8B4
41	P8B7	42	P8B6
43	P8C1	44	P8C0
45	P8C3	46	P8C2
46	P8C5	48	P8C4
49	P8C7	50	P8C6

1. DB40 Connector Pin Assignments (CN5)

Pin	Function	Pin	Function
1	GND	2	CLR0
3	GATE0	4	OUT0
5	GND	6	CLR1
7	GATE1	8	OUT1
9	GND	10	CLR2
11	GATE2	12	OUT2
13	GND	14	CLR3
15	GATE3	16	OUT3
17	GND	18	CLR4
19	GATE4	20	OUT4
21	GND	22	CLR5
23	GATE5	24	OUT5
25	GND	26	+5V
27	GND	28	-12V
29	GND	30	+12V
31	GND	32	-12V
33	GND	34	GND
35	5MHZ	36	1MHZ
37	GND	38	GND
39	500KHZ	40	100KHZ