Because interrupts were not used, there were no issues relating to interrupt conflicts on PC hardware of the day. The "breakthrough" was that the library polled the serial ports, rather than allowing them to interrupt the processor, which was the against the accepted wisdom of the time, and through use of polling and making use of the FIFO buffers that were by this time standard on UART chips, an - at the time - unheard of number of serial ports could be attached to a PC. The GSBL was a powerful set of assembler routines written for IBM and compatible PCs that allowed up to 32 simultaneous serial port or dialup connections to a single software instance without the need for an external multitasker. The Major BBS was developed by Tim Stryker and launched in 1986 by Stryker's company, Galacticomm, Inc., as a demonstration of the abilities of the Galacticomm Software Breakthrough Library (or GSBL).
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