Quatech DS-102 user manual

Page 35

DS-102 Dual Channel RS-232 Asynchronous Communications Adapter

User's Manual

Revision 3.00 August 13, 1993

Image 35

Contents DS-102 Page External Connections VI. Serial Port Functional Description IV. Setting Interrupt Levels IrqsVII. Specifications VIII. Troubleshooting Table of ContentsPage Date of Purchase Model Number Page General Information Port Address IRQ Enabled ? Diagram of DS-102 Examination of a serial port base address Setting the addressSerial 1 uses SW1 Serial 2 uses SW2 Recommended addresses for serial ports Enabling or disabling portsThis page intentionally left blank Serial Channel Connection Interrupt Operation Interrupt SharingExternal Connections J7 -- Serial J8 -- Serial DS-102 connector definitions for RS-232-C This page intentionally left blank VI. Serial Port Functional Description Dlab Accessing the Serial Port registersInterrupt Identification Register Interrupt Enable RegisterInterrupt Identification Register bit definitions RXT0 Fifo Control Register 16550 onlyStkp EPS PEN Parity Line Control RegisterAre being used Modem Control RegisterLine Status Register bit definitions Line Status RegisterScratchpad Register Modem Status RegisterWhen the receiver Fifo and receiver interrupts are enabled Fifo Interrupt Mode Operation 16550 Uart onlyFifo polled mode operation 16550 Uart only Baud Rate Selection Factory default 026 16450 16550 optional VII. SpecificationsComputer will not boot up