Hardware manual

ManualsBrandsComtrol ManualsComputer HardwareRocket Port Multiport Serial Cards 550

Table of Contents

Serial HOWTO

4.4 Interrupts.........................................................................................................................................12

4.5 Data Flow (Speeds)..........................................................................................................................13

4.6 Flow Control...................................................................................................................................14

Example of Flow Control................................................................................................................14

Symptoms of No Flow Control.......................................................................................................15

Hardware vs. Software Flow Control..............................................................................................15

4.7 Data Flow Path; Buffers...................................................................................................................15

4.8 Complex Flow Control Example.....................................................................................................16

4.9 Serial Driver Module.......................................................................................................................18

4.10 The Serial Port is Now Obsolete on PCs.......................................................................................18

4.11 RS-232 Cable Is Low Speed & Short Distance............................................................................18

4.12 Inefficient PCI Interface to the Computer (in some cases)............................................................19

5. Multiport Serial Boards/Cards/Adapters............................................................................................19

5.1 Intro to Multiport Serial...................................................................................................................19

5.2 Dumb vs. Smart Cards.....................................................................................................................19

5.3 Getting/Enabling a Driver................................................................................................................20

Introduction.....................................................................................................................................20

Build (compile) support into the kernel?.........................................................................................20

Using module support....................................................................................................................20

Getting info on multiport boards.....................................................................................................20

5.4 Multiport Devices in the /dev Directory,.........................................................................................21

5.5 Making Legacy Multiport Devices in the /dev Directory...............................................................21

5.6 Standard PC Serial Cards.................................................................................................................21

5.7 Dumb Multiport Serial Boards (with standard UART chips)..........................................................22

5.8 Intelligent Multiport Serial Boards..................................................................................................23

5.9 Unsupported Multiport Boards........................................................................................................25

6. Servers for Serial Ports......................................................................................................................25

7. Configuring Overview.......................................................................................................................26

8. Locating the Serial Port: IO address, IRQs.......................................................................................27

8.1 What Bus is my Serial Port On?......................................................................................................27

8.2 IO & IRQ Overview.........................................................................................................................27

8.3 PCI Bus Support.............................................................................................................................28

Introduction.....................................................................................................................................28

More info on PCI.............................................................................................................................29

8.4 Common mistakes made re low-level configuring..........................................................................29

8.5 IRQ & IO Address Must be Correct...............................................................................................29

8.6 What is the IO Address and IRQ per the driver ?............................................................................30

Introduction.....................................................................................................................................30

I/O Address & IRQ: Boot-time messages......................................................................................30

The /proc directory and setserial....................................................................................................31

8.7 What is the IO Address & IRQ of my Serial Port Hardware?........................................................32

Introduction.....................................................................................................................................32

PCI: What IOs and IRQs have been set?........................................................................................32

PCI: Enabling a disabled port.........................................................................................................32

ISA PnP ports.................................................................................................................................33

Finding a port that is not disabled (ISA, PCI, PnP, non-PnP).........................................................33

Exploring via MS Windows (a last resort)......................................................................................33

Serial HOWTO