Serial Ports Si And S2; Completing The System Cabling Record - IBM RT User's Setup Manual

Serial Ports SI and S2

Completing the System Cabling Record

2-6 User Setup Guide
On IBM 6150 System Units only, SI and S2 use the RS232C
interface to provide Direct Memory Access (DMA) data transmit
capability. To minimize impact on overall system performance,
connect the fastest serial output devices (printers and plotters) in
your system configuration to these ports. Because SI has higher
DMA priority than S2, connect the highest speed device to SI.
Locate the appropriate example and blank cabling record in
Appendix A (Figures A-l through A-4 on pages A-4 through A-9),
and read all the Appendix A instructions. As you connect each
device to an adapter or port, write the name of the adapter, device,
or devices in the correct boxes. Do not record where you
connected the keyboard and mouse.
Use care when you complete this record, because you need this
information when you test the system (Setup Task 7, Section 1) and
when you install the operating system programs (Setup Task 8,
Section 1).
Because each system unit can contain different adapters and
different arrangements of the adapters, this book cannot tell you
the exact location of many of the adapters. When the adapter must
be in a particular slot, that slot is highlighted.
Some of the adapters can be installed in more than one slot. In
this case, all the possible slots are highlighted.
Use the enlarged drawings to identify the adapters. Do not try to
identify the locations of the adapters by looking only at the
highlighted adapter slots.
Stop here a n d go to ta s k 6 on 1-6 on the check list.