Command 2109: Sets the specified memory I/O port in bytes

Simultaneously sets 8 memory I/O bits.

Command Syntax

	bit	Name	Description
Parameter 1	15	bytePortNumber	Specifies the byte port of the memory I/O.
	14
	｜
	1
	0

	bit	Name	Description
Parameter 2	15	reserved	Returns “0”.
	｜
	8
	7	outData	Returns the output pattern of the output group specified by portNumber by an integer from 0 to 255.
	6
	5
	4
	3
	2
	1
	0

Response Syntax

Refer to the following.

Response Codes

Description

The command simultaneously sets eight memory I/O bits using the combination of portNumber and outData values. The portNumber parameter specifies which group of 8 outputs to be used.

For example, if portNumber = 0, output bits 0-7 are used. If portNumber = 1, output bits 8-15 are used..

Once portNumber is selected, a specific output pattern must be defined using the outData parameter. The outData parameter is an integer value between 0-255.

The tables below show combination examples of I/O and their associated outData values when portNumber is 0 or 1 accordingly.

Output Settings When portNumber = 0 (Output number)

outData Value	7	6	5	4	3	2	1	0
01	off	off	off	off	off	off	off	on
02	off	off	off	off	off	off	on	off
03	off	off	off	off	off	off	on	on
08	off	off	off	off	on	off	off	off
09	off	off	off	off	on	off	off	on
10	off	off	off	on	off	off	off	off
11	off	off	off	on	off	off	off	on
99	off	on	on	off	off	off	on	on
255	on	on	on	on	on	on	on	on

Output Settings When portNumber = 1 (Output number)

outData Value	15	14	13	12	11	10	9	8
01	off	off	off	off	off	off	off	on
02	off	off	off	off	off	off	on	off
03	off	off	off	off	off	off	on	on
08	off	off	off	off	on	off	off	off
09	off	off	off	off	on	off	off	on
10	off	off	off	on	off	off	off	off
11	off	off	off	on	off	off	off	on
99	off	on	on	off	off	off	on	on
255	on	on	on	on	on	on	on	on

Example

When outputting 254 to Port #1.

Command	Response
083DH 0001H 00FEH	083DH 0000H 0000H