msm80c86a-10js Oki Semiconductor, msm80c86a-10js Datasheet - Page 20

• Manufacturer Part Number: msm80c86a-10js
• Description: 16-bit Cmos Microprocessor
• Manufacturer: Oki Semiconductor

¡ Semiconductor
Memory Organization
Memory Reference Need
Segment
Register File
Instructions
Stack
Local Data
External (Global Data)
DS
CS
SS
ES
+Offset
64KB
Segment Register Used
XXXXOH
FFFFFH
OOOOH
Code Segment
Stack Segment
Data Segment
Extra Data Segment
CODE (CS)
STACK (CS)
DATA (DS)
EXTRA (ES)
Automatic with all instruction prefetch.
All stack pushes and pops. Memory references
relative to BP base register except data references.
Data references when relative to stack, destination
of string operation, or explicitly overridden.
Destination of string operations: Explicitly
selected using a segment overriden.
Reserved Memory Locations
Segment Selection Rule
Interrupt Pointer
Interrupt Pointer
Interrupt Pointer
Reset Bootstrap
Program Jump
MSM80C86A-10RS/GS/JS
for Type 255
for Type 1
for Type 0
FFFFFH
FFFFOH
3FFH
3FCH
7H
4H
3H
0H
20/37