Modem implemented in software for operation on a general purpose computer having operating system with different execution priority levels

摘要: A software implementation of a modem, particularly designed to execute on general purpose host processor, controlled by non-real-time, multi-tasking operating system (OS), such as the Windows 95 OS. The modem is scaleable and portable. In this fashion, communication protocols (particularly datapumps) may be easily added to, or removed from, system, adapted for use other types processors systems. controller datapump portions plurality interacting subsystems, each which can at least one several priority levels. HRT level routine responsible handling an ASIC that buffers transmit receive samples destined received from phone lines. SRT task includes logic needs time functionality, but not time-critical like logic. BRT routines in event-driven basis are used many functions.