System Board Slots; Adapters In Fixed Positions - IBM RT User's Setup Manual

System Board Slots

Adapters in Fixed Positions

1-16 Options Installation
Adapters having one central tab go in system board slots B, C, and
D. Either the IBM RT PC Processor and Memory Management
Card, the IBM RT PC Advanced Processor Card (APC), or the IBM
RT PC Enhanced Advanced Processor Card (EPC) can be installed
in slot A. Slot B is reserved for the optional IBM RT PC
Floating-Point Accelerator or the IBM Advanced Floating-Point
Accelerator. Slot C,
with the exception of the IBM R T PC 8M-byte
Fast Memory Expansion,
and slot D should contain the second memory option'. When used,
the IBM RT PC 8M-byte Fast Memory Expansion should always be
installed in Slot D.
Note: Under certain conditions, you may have to move the first
memory option if you install a second one; refer to "Installing
Memory Options" on page 54. Do not move these adapters unless
told to do so. No other adapters may be installed in slots B, C, or
D.
Certain adapters must be installed in specific adapter Mots:
• Fixed-Disk and Diskette Drive Adapters
When the IBM Personal Computer AT Fixed-Disk and Diskette
Drive Adapter is installed in adapter slot 1 of an IBM 6150, the
first two 40M byte fixed-disk drives and the two diskette drives
connect to this adapter. To add a third 40M byte fixed-disk
drive, you must install a second IBM Personal Computer AT
Fixed-Disk and Diskette Drive Adapter in adapter slot 2. The
first drive adapter is preprinted on the system unit diagram in
Appendix A.
If the IBM RT PC ESDI Magnetic Media Adapter is installed in
adapter slot 1 of an IBM 6150, the first two IBM RT PC 70MB
ESDI Fixed-Disk Drives (Type R70) and two diskette drives can
be accommodated; a second ESDI Magnetic Media Adapter in
adapter slot 2 is required for a third IBM RT PC 70MB ESDI
should contain the first memory option,