Hardware Data and Specifications

These topics contain information about hardware interfaces and specifications.

Controllers

• 6845 - Motorola CRT Controller
• NEC μPD765 - Floppy Disk Controller - 8272A
• 8042 - Keyboard Controller (AT,PS/2)
• 8259 - Programmable Interrupt Controller (PIC)

Communication

• UART - Universal Asynchronous Receiver/Transmitter
• RS232 Communication Configuration
• Hayes Command Set / Register Formats

Hardware clock and timers

• CMOS RTC - Real Time Clock and Memory
• 8253/8254 PIT - Programmable Interval Timer

Input peripherals

• Joystick / Game Port (201h)
• Keyboard Commands & Responses

Discrete components

• Resistor Color Code Chart
• Ceramic File Capacitor Color Code Chart

Printers

• Parallel Printer Port
• Epson FX Printer Codes
• Hewlett Packard Laserjet Printer Control Codes

Miscellaneous

• PORTS - Common I/O Port Addresses
• PC, XT and AT 8 bit BUS Structure
• DIAGS - IBM PC Diagnostic Error Codes
• Hard Drive Specifications