IBM RT PC 10 Hardware Maintenance And Service page 108

Step 2
1. Look at the letter in the 21x (x=any letter) SRA, then find the column
for that letter in the following tables.
2. Record the switch settings shown for the letter. Go to "Step 3" on
page 3-65.
SRA Letter A
B
C D E F
orr
On
orr
On Off On Off On
Off On Off On
Switch 1 X X Not Not X X
Switch 2 X X valid valid X X
Switch 3 X X I/O I/O X X
Switch 4 X X
memory memory X X
Switch 5 X X addresses addresses X X
Switch 6 X
X X X
Switch 7
Either Either Either Either
Switch 8 Either Either Either Either
Starting
Address of 000000 040000 080000 OCOOOO
100000 140000
256K
bytes
Problem Isolation Charts
3-63