EasyManuals Logo

Motorola MC68020 User Manual

Motorola MC68020
306 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #36 background imageLoading...
Page #36 background image
2- 6 M68020 USER’S MANUAL MOTOROLA
2.3.2 Exception Stack Frame
Exception processing saves the most volatile portion of the current processor context on
the top of the supervisor stack. This context is organized in a format called the exception
stack frame. This information always includes a copy of the SR, the PC, the vector offset
of the vector, and the frame format field. The frame format field identifies the type of stack
frame. The RTE instruction uses the value in the format field to properly restore the
information stored in the stack frame and to deallocate the stack space. The general form
of the exception stack frame is illustrated in Figure 2-1. Refer to Section 6 Exception
Processing for a complete list of exception stack frames.
0
15
SS
P
12
FORMAT
S
TATUS REGISTE
R
PROGRAM COUNTER
V
ECTOR OFFSE
T
A
DDITIONAL PROCESSOR STATE INFORMATIO
N
(2, 6, 12, OR 42 WORDS, IF NEEDED)
Figure 2-1. General Exception Stack Frame

Table of Contents

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the Motorola MC68020 and is the answer not in the manual?

Motorola MC68020 Specifications

General IconGeneral
BrandMotorola
ModelMC68020
CategoryComputer Hardware
LanguageEnglish

Related product manuals