IBM Personal System/2 60 - System Board Block Diagram

System Board Block Diagram
lock
Bus
Central
7 Controlier Arbitration Point
16 - Level
Interrupt
Controller
Diskette j—1
Controller 3
ROM Channel
Ti
Video
=
mer
Graphics
Array
[—}
Kybd/Aux.
Device
80287
DRAM
Controller
Coprocessor
Serial
CT
(optional)
to
Port
CMOS
Memory Clock
Controllerh
DMA
Parallel
[1]
Controller
Port
-——|_
Buffer
M
Cc
i
8
Control
Buffer
of
c
°
80286
f
Data
|
cnn
Microprocessor
f
Address
°
nf
6
e
Lf
Multidevice
Interface
1
c
f t
°
r
s
Oscillator
Figure 1-2. System Board
Model 60 System Overview — October 1990 1-5