IBM 5280 Manual page 54

C
I
003
BASE MAP
PARITY
CHECK
PAGE 2 OF
(ENTRY POINT AA)
4
Is the feature Main storage card
installed in location A-B5?
Y N
004
GO TO STEP OOS,
ENTRY POINT AB.
005
- Probe;
A-B5-TPOl '+feature parity check'
0'11 t1 4 03) •
Up
light: On
Down Ii ght: O-ff
NOTE: Answer 'No' if no TP on the
card.
Are the lights correct?
Y N
3
006
- Power Off.
- Remove the Feature Main
Storage card <A-BS) (MIM 501).
- Power On.
Does Power On Checkout fail with
a Parity Check?
Y N
007
- Defective
Storage
403) .
Feature
card (A-B5)
Main
n1IM
D E
E MAP 0532-2
008
(ENTRY POINT AB)
- Probe All control lines in the
chart.
Line Name
- Valid Address
- Parity Error
+, HT/-RD
- T Comp
- Stor Request Dot
- Parity Bit
- Feat Stor Select
Up
light: Off
Down light: On
Probe Point
(MIM 501)
A-C4D02
A-C4D04
A-C5D04
A-CSD05
A-CSD06
A-CSD09
A-C7B02
Are the lights correct for any
line?
Y N
009
Probe Both lines in the chart.
Line Name Probe Point
SAR Bit 0 Dot
+ Device Select 4
Up
light: Off
Down light: On
(MIM 501)
A-C6D13
A-C7BII
Are the lights correct for both
lines?
Y N
33:;
F G H
ECS40S74 PECS397S7
MAP 0532-2