IAS

IAS (Interrupt Address Set) is one of the Special opcodes in the DCPU-16 specification. It set the IA register to a new value.

Usage

 IAS arg1

Sets IA to arg1.

This value can be used to configure whether interrupts are enabled (if non-zero) or disabled (if zero). If enabled, an interrupt will either be handled immediately after the current instruction (by setting PC to IA), or queued (depending on whether interrupt queueing has been enabled or disabled - this is a separate setting). If IA is set to zero, all interrupts will be ignored and forgotten.

To read IA, use IAG.

Processing

In binary machine code, this Special opcode's five-bit representation is: 0b0 1010 (0x0a)

The instruction has a takes one cycle to execute, plus any additional cycles necessary to evaluate the argument.

References

• DCPU-16 specification v1.7 (Copyright 2012 Mojang)