PDP11 Programming tips and code fragments

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Arithmetic Arithmetic  Some arithmetic code MulDivAsh  16-bit MUL, DIV, ASH in software AddSub32  32-bit addition and subtraction Multiply32  32-bit multiply Divide32 32-bit divide Conversions and calculations SqRoot  SqRootTest (L)  Calculate integer Square Root Integer Square Root BASIC source and test code Dates and Time DayOfWeek  DofWeek (L) Calculating day of week Day of Week BASIC source and test code Input/Output AnsiKBD  Parsing ANSI keyboard input AnsiVDU  Converting to ANSI VDU output KBDTest  Testing for a keypress Various things Debug  Various debug subroutines UnixRT  Creating a combined RT11/Unix runtime binary Radix50  Encoding/decoding a Radix50 filename

Displaying numbers PrDecimal  Printing small numbers in decimal PrDecNum  Printing decimal numbers without DIV PrDecDiv  Printing decimal numbers with DIV PrDecimals  Printing 32-bit selected decimal places CRC calculation CRC-8 Calculating 8-bit CRCs CRC16  Calculating CRC-16 for XMODEM and Acorn CFS/RFS CRC32  Calculating CRC-32 for ZIP files Calling Unix system calls System  Calling exec() to execute a file ClaimMem  Calling brk() to claim memory Documentation PDP11  PDP11 documentation RT11  RT11 documentation Unix  Unix documentation Programs and tools BBCBasic  BBC BASIC for the PDP11 DisAssem  BBC BASIC PDP11 disassembler Assembler  BBC BASIC PDP11 assembler

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Authored by J.G.Harston
Last update: 26-Sep-2020