System Board Slots; Adapters In Fixed Positions - IBM RT PC Options Installation

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 RT PC 8M-byte
Fast Memory Expansion, should contain the first memory option,
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 5-4. 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 slots:
• 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