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ATTACHE
Technical manual
OTRONA Attache Technical Manual
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:
Service manual
(79 pages)
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Contents
Table of Contents
Bookmarks
Table of Contents
Table of Contents
Attache System
Processor Board
Processor
Memory
I/O Rtc
Graphics
Serial
Expansion O~Ion
Display
Alphanumeric Display
Graphic Display
Standard Format
Keyboard
Multi-Function Keys
Power Supply
Setting the Voltage
System Block Diagram
Logic Overview
Processor Block Diagram
Central Processing Unit
Pin Functions
Pin Functions
DMA Operation
I/O Selection
Expansion Connector
Processor
Memory
Memory Block Diagram
RAS/CAS Schematic
Addressing RAM
Writing or Reading Data
Generating RAS/CAS
Memory Mapping
Erasable Programmable Read-Only Memory
Serial Block Diagram
Clock
Reset
Serial Input/Output Controller
Pin Functions
SIO Operation
The Ports
Counter Timer Circuit
Pin Functions
Interrupts
Serial
Daisy Chained Interrupts
Display
Cathode Ray Tube
CRT Screen
CRT Controller
Pin Functions
Timing
Video Character
Display Timing
Reading or Writing to the Screen
Selecting the Address
Addressing the Display
Writing the Data on the Screen
Attributes
Graphics
Parallel Input/Output Controller
Pin Functions
Sound Effects Generator
Power .Supply
Floppy Block Diagram
Write Precomt:ensation
Clock and Data Timing
Data Separator
Diskette Format
Diskette Track Format
Introduction
AC Power Module
Power Cords
Control Power Regulator
Pulse Width Modulator
PWM Dead Time
Over-Current and Soft Start
High Voltage Driver Board
Flyback Transformer
Output Supply Rectifiers and Filters
Power Okay Sensor
Voltage Monitor
Fan Driver
Connectors
Keyboard
Keyboard Block Diagram
Introduction
Keyboard Grid
Basic Keyboard Logic
Additional Circuitry Functions
Keyboard Layout
ASCII Character Codes
ASCII Chart
Display Module
Horizontal
Display Module Block Diagram
Vertical
Video
Crt
Diskette Drive
Diskette Drive Block Diagram
Head Movement
Writing
Write Timing
Reading
Read Signals
Turning the Diskette
CP/M Memory Map
CP/M Memory Locations
Low Memory Map
Iobyte
Low Memory Maps
File Control Block
Terminal Emulation
Monitor Mode - Diagnostics
Monitor Mode Diagnostics
Generate Display Pattern
Display RAM Test
Jump
Input Test
Keyboard Test
Loop Tests
Output Test
Format Diskette Test
Read a Sector from a Disk - V
Write a Sector to a Disk
I/O Port Transmit
I/O Port Receive
Cboot
Blocking/Deblocking
Physical Read/Write
Disk Read Operation
Input/Output Driver
Additional Functions
Programming I/O Devices
Progranuning the SIO Baud Rate
Programming Baud Rates
Accessing the Display Driver
Display Driver
I/O Ports
Character Transmission
Attribute Transmission
Display Control Parameters Transmission
Graphic Data Transmission
Writing to the Display
Cursor Control Escape Commands
Clear and Delete Escape Commands
Insertion Escape Commands
Screen Parameter Escape Commands
Attache Control Character Codes
Screen Attribute Codes
Coding Screen Attributes
Attache Character Sets
Character Sets
Character Size Selection
CMOS Memory Allocation
Programming Sounds or Alanns
Baud Rates
Attache Clock
Accessing the Clock
Interrupt Structure
Introduction
I/O Device Interrupts
60 Hz Interrupts
Programming Interrupt Driven I/O
Generation of Keyboard Character Code
Physical Keyboard Layout
ASCII Translation
Determining the Character Code
Character Codes as Stored in BIOS
Changing a Keycode in Memory
Valet
Appendixes
Processor
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See also:
Service Manual
Attache
. Portable Computer
Technical Manual
.Hardware
Theory of Operation
Software
Appendixes
Table of
Contents
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