IBM Personal System/2 50 - System Board Block Diagram

System Board Block Diagram
16 - Level
Interrupt
Controtler
Diskette [|—4
Controller 3
ROM Channel
Video | Timer
[ Graphics
Array Kybd/Aux.
Device
80287
DRAM
Controller
Coprocessor Serial I
(optional) = Port
CMOS
Memory Clock
Controller
DMA Parallel [7]
Controller Port
Buffer M c
i
8 Control | Buffer ch c
ao
80286
f
Data
r
n
Microprocessor
f
Address
°
"
n
e
e
Ln Multidevice Interface ‘ c
[ t
°
Clock
Bus
Central
r
IT}
Controtler
Arbitration
Point
s
Oscillator
Figure 1-3. System Board
Model 50 System Overview ~ October 1990 1-5