IBM 5280 Technical Newsletter page 155

303
DISKETTE/MAIN MPU CARD (A-C1)
(continued)
Jumpers 1 and 3 must always be installed.
Jumpers 2 and 4 must be removed if the feature
main MPU is installed.
Base Main MPU ROS
Patch Signal Cable Connector
Base Main MPU
Card A-C1
Base Main MPU
Module Label
Switch
Jumper 5
(Diskette Attention
Jumper). Must be
removed if the
feature main MPU
is installed.
Number Function
8 Not Used
7 Must be Off
6 Must be Off
5 Must be Off
Modu Ie Label
Page of SY31-0600-1
As updated September 7, 1981
By TNL SN20-9656
Color Code
32K Card-No Color
64K Card-Red
4
3
2
On if diskette drive 4000 is installed
On
"if
diskette drive 4400 is installed
On if diskette drive 4800 is installed
On if diskette drive 4COO is installed
Note: Remove the plastic switch cover to change the
settings of the switches. After you have changed the
settings of the switches, reinstall the switch cover.
303
Diskette Drive 51