- Ms-dos Serial Port Configuration
- Ms Dos Serial Port Configuration Key
- Ms Dos Serial Port Configuration List
- Ms Dos Serial Port Configuration Number
- Ms Dos Serial Port Configuration Chart
Name
The TESTCOM program provides diagnostic routine to test your serial ports under MS/DOS operating system. It provides internal loopback test and external loop test. To test your serial port under MS/DOS, please type. Then screen will display as follows. E) Click on the 'Port Settings' tab. Click the 'Advanced' button. F) Click on “COM Port Number.” g) Pull down the scrollbar and select “COM1.” h) Click “OK.” If there is no COM port or Other Device showing in Device Manager you need to enable the serial/COM port in the laptop BIOS, assuming the laptop has a COM port.
setserial - get/set Linux serial port information- Please I have MS-DOS 6.22 that runs on a Pentium 4 3.0 GHz machine with 512MB of ram. I use this machine to run a legacy application. The legacy application uses serial port to communicate with an external hardware. The problem is that the connection is not stable sometimes it fails and so the program fails to communicate and terminate.
- The edit command starts the MS-DOS Editor tool, which is used to create and modify text files. Edlin: The edlin command starts the Edlin tool, which is used to create and modify text files from the command line. Edlin was only available up to MS-DOS 5.0 so unless your version of MS-DOS 6.22 was upgraded from 5.0, you likely won't see the edlin.
Synopsis
setserial [ -abqvVWz ] device [ parameter1 [ arg ] ] ..setserial -g [ -abGv ] device1 ..
Description
setserial is a program designed to set and/or report the configuration informationassociated with a serial port. This information includes what I/O port and IRQ a particular serial port is using, and whether or not the break key should beinterpreted as the Secure Attention Key, and so on.During the normal bootup process, only COM ports 1-4 are initialized, using the default I/O ports and IRQ values, as listed below. In order to initializeany additional serial ports, or to change the COM 1-4 ports to a nonstadard configuration, the setserial program should be used. Typically it is calledfrom an rc.serial script, which is usually run out of /etc/rc.local.
The device argument or arguments specifies the serial device which should be configured or interrogated. It will usually have the following form:/dev/cua[0-3].
If no parameters are specified, setserial will print out the port type (i.e., 8250, 16450, 16550, 16550A, etc.), the hardware I/O port, the hardwareIRQ line, its 'baud base,' and some of its operational flags.
If the -g option is given, the arguments to setserial are interpreted as a list of devices for which the characteristics of those devices should beprinted.
Without the -g option, the first argument to setserial is interpreted as the device to be modified or characteristics to be printed, and anyadditional arguments are interpreted as parameters which should be assigned to that serial device.
For the most part, superuser privilege is required to set the configuration parameters of a serial port. A few serial port parameters can be set by normalusers, however, and these will be noted as exceptions in this manual page.
Options
Setserial accepts the following options:Parameters
The following parameters can be assigned to a serial port.Cleanmymac x 4 4 5. All argument values are assumed to be in decimal unless preceeded by '0x'.
Some internal modems are billed as having a '16550A UART with a 1k buffer'. This is a lie. They do not have really have a 16550A compatible UART; insteadwhat they have is a 16450 compatible UART with a 1k receive buffer to prevent receiver overruns. This is important, because they do not have a transmit FIFO.Hence, they are not compatible with a 16550A UART, and the autoconfiguration process will correctly identify them as 16450's. If you attempt to override thisusing the uart parameter, you will see dropped characters during file transmissions. These UART's usually have other problems: the skip_testparameter also often must be specified.
![Configuration Configuration](https://www.simulant.uk/blog/wp-content/uploads/2018/09/retro-wifi-rs232-serial-hayes-modem-usb.jpg)
Ms-dos Serial Port Configuration
The application of this parameter is for getty's which are blocked on a serial port's dial in line. This allows the getty to reset the modem (which may havehad its configuration modified by the application using the callout device) before blocking on the open again.
![Configuration Configuration](https://techtooltip.files.wordpress.com/2008/09/virtualboxserialportsettings.jpg)
Considerations of Configuring Serial Ports
It is important to note that setserial merely tells the Linuxkernel where it should expect to find the I/O port and IRQ lines of a particular serial port. It does *not* configure the hardware, the actual serial board, touse a particular I/O port. In order to do that, you will need to physically program the serial board, usually by setting some jumpers or by switching some DIPswitches.This section will provide some pointers in helping you decide how you would like to configure your serial ports.
The 'standard MS-DOS' port associations are given below:Due to the limitations in the design of the AT/ISA bus architecture, normally an IRQ line may not be shared between two or more serial ports. If you attemptto do this, one or both serial ports will become unreliable if you try to use both simultaneously. This limitation can be overcome by special multi-port serialport boards, which are designed to share multiple serial ports over a single IRQ line. Multi-port serial cards supported by Linux include the AST FourPort, theAccent Async board, the Usenet Serial II board, the Bocaboard BB-1004, BB-1008, and BB-2016 boards, and the HUB-6 serial board.
The selection of an alternative IRQ line is difficult, since most of them are already used. The following table lists the 'standard MS-DOS' assignments ofavailable IRQ lines:Most people find that IRQ 5 is a good choice, assuming that there is only one parallel port active in the computer. Another good choice is IRQ 2 (aka IRQ9); although this IRQ is sometimes used by network cards, and very rarely VGA cards will be configured to use IRQ 2 as a vertical retrace interrupt. If yourVGA card is configured this way; try to disable it so you can reclaim that IRQ line for some other card. It's not necessary for Linux and most other Operatingsystems.
Beatunes 4 6 2 download free. The only other available IRQ lines are 3, 4, and 7, and these are probably used by the other serial and parallel ports. (If your serial card has a 16bitcard edge connector, and supports higher interrupt numbers, then IRQ 10, 11, 12, and 15 are also available.)
On AT class machines, IRQ 2 is seen as IRQ 9, and Linux will interpret it in this manner.
IRQ's other than 2 (9), 3, 4, 5, 7, 10, 11, 12, and 15, should not be used, since they are assigned to other hardware and cannot, in general, bechanged. Here are the 'standard' assignments:
Multiport Configuration
Certain multiport serial boards which share multiple ports on a single IRQ use one or more ports to indicate whether or not there are any pending portswhich need to be serviced. If your multiport board supports these ports, you should make use of them to avoid potential lockups if the interrupt gets lost.
In order to set these ports specify set_multiport as a parameter, and follow it with the multiport parameters. The multiport parameters take the formof specifying the port that should be checked, a mask which indicate which bits in the register are significant, and finally, a matchparameter which specifies what the significant bits in that register must match when there is no more pending work to be done.
Up to four such port/mask/match combinations may be specified. The first such combinations should be specified by setting the parameters port1,mask1, and match1. The second such combination should be specified with port2, mask2, and match2, and so on. In order todisable this multiport checking, set port1 to be zero.
In order to view the current multiport settings, specify the parameter get_multiport on the command line.
Here are some multiport settings for some common serial boards:
Hayes ESP Configuration
Setserial may also be used to configure ports on a Hayes ESP serial board.The following parameters when configuring ESP ports:
Caution
CAUTION: Configuring a serial port to use an incorrect I/O port can lock up your machine.Files
/etc/rc.local /etc/rc.serialSee Also
tty(4), ttys(4), kernel/chr_drv/serial.cAuthor
The original version of setserial was written by Rick Sladkey ([email protected]), and wasmodified by Michael K. Johnson ([email protected]).This version has since been rewritten from scratch by Theodore Ts'o ([email protected]) on 1/1/93. Any bugs or problems are solely his responsibility.
Referenced By
cytune(8),slsnif(1),statserial(1),tcflush(3)Library
Instrument Control Toolbox
Description
The Serial Configuration block configures parameters for a serialport that you can use to send and receive data. You must set the parametersof your serial port before you set up the Serial Receive and the SerialSend block.
You must first specify the configuration of your serial portbefore you configure the Serial Receive and Serial Send blocks. TheReceive and Send blocks will prompt you to add a Configuration blockto configure your serial port properties.
Note
You need a license for both the Instrument Control Toolbox™ and Simulink® softwareto use this block.
Other Supported Features
- This block supports the use of Simulink Accelerator™ mode, but not Rapid Accelerator or code generation.
- The block supports the use of model referencing, so that your model can include other Simulink models as modular components.
For more information on these features, see the Simulink documentation.
Parameters
Specify the serial port to configure. You have to select anavailable port from the list. By default no port is selected and thisfield displays <Please select a port..>.Use this configured port in your Serial Send and SerialReceive blocks. Each Serial Send and Receive block must havea configured serial configuration. If you use multiple serial portsin your simulation, you must configure each port using a separateserial configuration block.
Specify the rate at which bits are transmitted for the serialinterface. Default value is
9600
.Specify the number of data bits to transmit over the serialinterface. Default value is 8 and other availablevalues are 5, 6, and 7.
Specify how you want to check parity bits in the data bits transmittedvia the serial port. By default this is set to none,and the available values are:
- none — Where no paritychecking is done.
- even — Where parity bitis set to 0 if the number of ones in a given set of bits is even.
- odd — Where parity bitis set to 1 if the number of ones in a given set of bits is odd.
- mark — Where parity bitis always set to 1.
- space — Where parity bitis always set to 0.
Ms Dos Serial Port Configuration Key
Specify the number of bits used to indicate the end of a byte.The number of data bits you select determines the choices availablefor stop bits. If you select data bits 6, 7,or 8, then the default value is 1 andthe other available choice is 2. If you selectdata bit 5, then the only choice available is 1.5.
Specify the byte order as
littleEndian
(default)or bigEndian
. If byte order is littleEndian
,then the instrument stores the first byte in the first memory address.If byte order is bigEndian
, then the instrumentstores the last byte in the first memory address.You should configure byte order to the appropriate value foryour instrument before performing a read or write operation. Referto your instrument documentation for information about the order inwhich it stores bytes.
Ms Dos Serial Port Configuration List
Specify the process of managing the rate of data transmissionon your serial port. Choose none to have no flowcontrol or hardware to let your hardware determinethe flow control.
Ms Dos Serial Port Configuration Number
Specify the amount of time that the model will wait for thedata during each simulation time step. The default value is
10
(seconds). Ms Dos Serial Port Configuration Chart
See Also
Query Instrument, Serial Receive, SerialSend, TCP/IP Receive, TCP/IP Send, ToInstrument, UDP Receive, UDP Send