IBM AT 5170 Technical Reference page 16

System Block Diagram
System Unit
System Board
80286
80287
Osci llator
Power Supply
Microprocessor
Coprocessor
115/230
16 Interrupt
ROM Speaker Speaker
Levels
Connector
7 Channel
RAM Keyboard Keyboard
DMA
Controller
CMOS Real-Time
Battery
Battery
Clock Connector
Fixed
Diskette
Disk Drives
Drives
I/O
Channel
Fixed Disk and
00000000
Diskette Adapter
DDDDD D
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