EXAPUNKS - Quick reference for the language used to control EXAs

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A quick reference for the language used to control EXAs.

Introduction

Here’s a quick-reference guide to the language used in EXAPUNKS to control EXAs.

Basic Commands

Command / Syntax / Usage

COPY R/N R Copy the specified value to the specified register
ADDI R/N R/N R Adds the first two values and stores the result in the specified register
SUBI R/N R/N R Subtracts the second value from the first and store the result in the specified register
MULI R/N R/N R Multiplies the first two values and stores the result in the specified register
DIVI R/N R/N R Return how many times the second value fits completely into the first value, and stores it in the specified register
MODI R/N R/N R Returns the modulus of a division operation and stores it in the specified register
SWIZ R/N R/N R Modifies the given number according to a mask (Please see the section labelled “Swizzle”)
MARK L Create a label with the specified name
JUMP L Jumps to the specified label
TJMP L Jumps to the specified label if the T register is greater than 0
FJMP L Jumps to the specified label if the T register is 0
TEST R/N =/</> R/N | EOF | MRD Tests the specified condition, writing the result to T. Please see the “Testing” section
REPL L Creates a new EXA running from the specified label
HALT Kills the current EXA, dropping any held file
KILL Kills a random EXA in this host (Prefers EXAs owned by the player)
LINK R/N Traverses the specified link
HOST R Writes the current host name to the specified register
MODE Toggles the M register’s access mode between Local and Global
VOID M/F Removes the current value from the currently held file / M register
MAKE Create a new file, held by this EXA
GRAB R/N Grab the specified file
FILE R Write the current file name to the specified register
SEEK R/N Move X values in the held file, where X can be between -9999 and 9999
DROP Drops the currently held file
WIPE Deletes the currently held file
NOTE Note instructions do not count towards the line-count
NOOP Do nothing for 1 cycle

Testing

The TEST command has many uses.

All uses of TEST overwrite the T register with 1 (true) or 0 (false).

This can be used to trigger jumps to labels, with TJMP and FJMP.

You can use TEST EOF to check if the file-pointer is at the end of the current file.

You can use TEST MRD to check if there is anything available to read on the M register.

Swizzle

SWIZ allows you to modify a number.

You pass the original number (or location/register) as the first argument, a mask to apply (or the location/register containing it) to the second argument, and the register to store the result in as the third.

The mask should be a four digit number consisting of digits 0-4.

Unusual Commands