TECH Topics

┌ Quick Reference ─────────────────────────────── Characters & Codes ──────┐
│ DOS Functions QuickRef    INTs & BIOS Services  ASCII■Dec■Hex■Binary xRef│
│ DOS Interrupts            BIOS Data Area        Box & Special Characters │
│ DOS Error Codes           IRQs: Hardware INTs   ASCII Control Codes      │
│ Service Groups            I/O Port Map          Character Set Matrix     │
│                                                                          │
│ 80x86/87 Opcodes          Cables & Pin Outs     ANSI Escape Sequences    │
└───────────────────────────────────────────────┐                          │
┌ Indexes ───────────────── DOS Fns ────────┐   │ Extended ASCII Keystrokes│
│ API Index                 by Category     │   │ Keyboard Scan Codes      │
│ Combined API Services     by Number       │   │ Keyboard Shift Flags     │
│ CONFIG.SYS Commands       by Version      │   │                          │
│ Data Structures           Superseded Fns  │   │ Screen Attributes        │
│ General Index             Obsolete Fns    │   │ Color Table              │
└───────────────────────────────────────────┘   └──────────────────────────┘
                           Overviews and Articles
──────────────────────────────────────────────────────────────█▌DOS kernel▐█
 About DOS Functions        File Attributes
 Absolute Disk I/O          File Handles
 Accessing Upper Memory     InDOS Flag
 Clean Boot                 Interactive Boot
 CONFIG.SYS                 Media Descriptor
 Critical Error Handler     MultiConfig Menus
 Device Drivers             Predefined Environment Variables
 DOS Environment            Program Startup & Exit
 DOS Versions               Standard I/O and I/O Redirection
 ErrorMode Flag             System Startup Sequence
 EXE File Header Layout     TECH Help! Data Structures
 File Allocation Table      TSR/Popup Topics
 DoubleSpace Overview
 DoubleSpace Compressed Volume File Layout
 Mapping DOS FAT to MDFAT
 Microsoft Real-Time Compression Interface (MRCI)
 Using a Compressed RAM Disk
───────────────────────────────────────────────────────█▌System Extensions▐█
 APM: Power Management      Windows Clipboard
 DPMI: Using DPMI Services  Windows Enh386 Services & Notifications
 EMS: Expanded Memory       VDD: Windows Virtual Display Device
 Mouse Support              VxDs: Some Published VxD IDs
 Multiplex Interrupt
 Switcher API Overview
 XMS: Extended Memory
────────────────────────────────────────────────────────────█▌Video Topics▐█
 Video Memory Layouts       CGA: Color Graphics Adapter
 Video Font Definition      EGA: Enhanced Graphics Adapter
 Video Services             MDA: Monochrome Display Adapter
 Video Attributes           VGA: Video Graphics Array
 Color Table                SVGA: SuperVGA Display Adapters
─────────────────────────────────────────────────────────────█▌BIOS Topics▐█
 AT Keyboard                Keyboard Flags
 BIOS Data Area             ROM-Scan
 Cables and Pin Outs        Speaker Control
 CMOS Storage Layout        Switch Settings
 Disk Partitions / MBR      System Compatibility
 I/O Port Map               System Startup Sequence
 IRQs: Hardware Interrupts