NCR PC4I Technical Reference

January 1986 Copyright '~' 1985, 1986 by NCR Corporation Dayton, Ohio All Rights Reserved Printed in the Federal Republic of Germany ( It is the policy of NCR Corporation to improve products as new technology, components, software, and firmware become available. NCR Corporation, therefore, reserves the right t ...

Your NCR PERSONAL COMPUTER MODEL 4i is a powerful business/professional personal computer. It is designed to act not only as an independent, self- sufficient system, but also as a control center for systems fulfilling a wide range of business, scientific and technological requirements. Esse ...

for designers, system integrators, and programmers who require detailed information about the construction and operation of the NCR PERSONAL ( COMPUTER MODEL 4i. Volume 1 includes information about the I/0 bus, signal levels and timing, power requirements, and pin assignments, not only of the NCR PERSONAL C ...

TECHNICAL REFERENCE MANUAL CONTERTS CHAPTER 1: System Overview Models and Options ••.••••••••••.•••••••••••••• 1-1 Model Identification •••••••..••••••••••••••••• 1-4 System Components . . . • • • . • . . . . . . . • ...

Introduction .............................. . Why use Interrupts? •••••••••••••••••••.•• Interrupts and the 8088 Microprocessor ••. Interrupt Controller Hardware and Logic Programming the PIC ••.•.••••••••••••.•• Initializing the PIC .•� ...

Introduction ••..••••••••..•••••.•••••••••••••• 4-1 RS-232-C Input/Output •••.••.•••.••.•••.••••••• 4-1 Programming the Serial Receiver/Transmitter. 4-6 Interrupt Enable Register ••.••.•••••••� ...

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 48TPI Flexible Disk Drive ••.••.•••••••••••••.• 6-1 Control and Data Signals •••••••••••••••••••• 6-4 Minimum Format Requirements .••••.••••.•••.• 6-13 ...

Keyboard Performance Code Generation ••••• Diagnostics CHAPTER 9: The Loudspeaker 8-10 8-10 8-12 Hardware Characteristics •••••••••••••••••••.•• 9-1 Programming Sound . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1 CHAPTER 10: Videotex Introduction •••••� ...

Programming the PCI • . . • . . • • . • . . . • • . • • • • • 10-53 Programming Asynchronous Communications. 10-56 Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-57 Status Register •••.•• ...