B&B Electronics SPP-100 - Manual - Manual (Page 7)

1. Introduction
The SPP-100 is an Enhanced Parallel Port (EPP) adapter for systems
equipped with PCMCIA Type II and/or Type III expansion sockets. The
SPP-100 is a PCMCIA Type II (5 mm) card and is PCMCIA PC Card
Standard Specification 2.1 compliant.
The figure below illustrates a complete SPP-100 system. The system
includes the CP-SPP cable assembly which converts the SPP-100’s 0.8mm
I/O connector into a standard D-25 female connector.
Figure 1. SPP-100 System Configuration.
Starting with the original PC, IBM defined the standard parallel printer
port. The original standard parallel printer port only supported data
output. The IBM PS/2 series added bi-directional support to the parallel
port. This was done by using one more bit in the control out register to
control tristating of the data out port. The next generation of parallel
ports is the EPP parallel port, which is defined by the IEEE P1284
standard. The IEEE standard defines a signaling method for
asynchronous, fully interlocked, bi-directional parallel communications
between hosts and printers or other peripheral devices.
The SPP-100 provides a single IEEE P1284 compliant EPP parallel port
which is also backward compatible with the standard PC-compatible
parallel port and the PS/2 type bi-directional parallel port.
SPP-100 User's Manual 1-1