• The LOS Manual
  • 1 General
    • Tasks
    • Inter-Task Communication
    • Partition Map
    • Programs and Overlay Modules
    • Direct Access
    • The Bootstrap
    • System Halts
    • Processor Halts and Loops
    • LOS Disc Layout
    • Configuration Table
    • Offset Addressing
    • Byte Addressing
    • Core Map
    • DRI Printer Vertical Format Tapes
  • 2 Utilities
    • ACT (Amend Configuration Table)
    • BOOT (Bootstrap Utility)
    • CALC (Octal Calculator)
    • CDL (Check Digit List)
    • COPY (Copy Discs)
    • DATE (Advance System Date)
    • DLU (Disc Labelling Utility)
    • DSnn (Disc Security)
    • FLAG (Switch Program Inhibit Flags)
    • LIST (Module/Core Dump Print Program)
    • MOVE (Move Overlay Module)
    • OP (On-Line Program Amendment)
    • PLM (Program Library Maintenance)
    • PMAP (Print Program Map)
    • R (Restart Task)
    • READ (Disc Read Utility)
    • RP (Reprint Utility)
    • S (Send Message)
    • SE (System Enquiry)
    • ZERO (Zeroise Sectors)
  • 3 Command Functions
    • n (Check Digit)
    • Q (Queue List)
    • D (Set System Date)
    • U (Use Plain Paper Queue)
    • Kn (Control Printer n)
    • Fn (File Table n)
    • Pn (Print Queue n)
    • S (Suspend/Single shot
    • R (Run)
    • Rn (Run restricted)
    • K (Cancel)
  • 4 Library Routines
    • Add
    • Add to Double Word
    • Calculate Check Digit
    • Clear Block of Core
    • Complement Double Word
    • Compute
    • Conversion: ASCII to Binary
    • Conversion: ASCII to Metacode
    • Conversion: Binary to ASCII
    • Conversion: Binary to Octal Characters
    • Conversion: Metacode to ASCII
    • Convert Input to Binary and test Limits
    • Convert to Negative if Positive
    • Convert to Positive if Negative
    • Divide with Remainder
    • Divide and Round
    • Divide by 10 with Remainder
    • Divide by 10 Rounded
    • Duplicate Block of Core
    • Left Shift Block of Core
    • Load A from Offset
    • Move and Pad Character String
    • Multiply
    • Multiply by 10
    • Name and Address Processor
    • Pack Date
    • Resolve Offset Address
    • Resolve Block of Offset Addresses
    • Right Shift Block of Core
    • Skip if Blocks Equal
    • Skip if Block not Zero
    • Space Fill Block of Core
    • Store A at Offset
    • Store Byte
    • Subtract
    • Subtract from Double Word
    • Swap Blocks of Core
    • Unpack Date
  • 5 Input/Output Routines
    • Flash
    • Flash Single Station
    • Get
    • Get (Character Mode)
    • Get (Binary Mode)
    • Get (Fetch Mode)
    • Get Password
    • Inhibit
    • Print Line
    • Put
    • Split
    • Specify I/O Station Escape Point
  • 6 Disc Handling (Data Records)
    • Copy Sectors
    • Extract from File Control Block or File Status Block
    • Fetch (Direct Access File)
    • Fetch (Overlay Module)
    • Fetch (Program)
    • Rewrite
    • Overwrite
    • Stow System Control Record
  • 7 Disc Handling (Spooling)
    • Assign Print Queue
    • Post to Print Queue
    • Skip if Original
    • Specify I/O Station Print Queue
    • Specify I/O Station Print Queue with Reprint Option
    • Spool
    • Spool and Post
    • Unspool
  • 8 Miscellaneous
    • Halt
    • Suspend
    • Transfers - I/O Stations only
      • End I/O Program
      • Error Handler
    • Transfers - Printers only
      • End Printer Program
      • Specify Re-entry Point
      • Specify Termination Routine
  • Programmers' Reference
    • Hardware
      • Words
      • Addresses
      • Registers and Flags
      • Instruction steps
      • Privileged Instructions
      • Register Instructions
      • Input/Output Instructions
      • Memory Reference Instructions
    • Software
      • Standard Core Locations
      • The Commandment
  • On-line Security
    • Drive or Cartridge failure
    • Operator action pending repairs
    • Regeneration of On-line Security after repairs
  • Sort Utility
    • SCAN
    • SORT
    • PRINT
    • Exclusivity
    • Timing Guide
    • Installation
    • Source Code
    • Sample Application
  • Art and Automation
    • Comments
    • Maggie arrives
    • Maggie and Denis in 1990