History Data Display - Epson S1C62 Family Reference Manual

Cmos 4-bit single chip microcomputer development tool

Table of Contents

Format

#H,<pointer 1>,<pointer 2>

#H,<pointer 1>

Function

Displays history data.

(1) Displays history data from <pointer 1> to <pointer 2>.

(2) When <pointer 2> defaults, displays history data of <pointer 1> in 21 lines.

(3) Numerals displayed in <pointer 1> and <pointer 2> are decimal, from 0 to 9999.

(4) The following contents are displayed for each instruction:

LOC:

PC:

IR:

OP:

OPR:

A,B,X,Y: Contents of A, B (Xp, Xh, Xl), (Yp, Yh, Yl) registers

IDZC:

Other:

(5) History memory has a capacity of 8192 bus cycles. One the other hand, the S1C62 Family

has 5, 7 and 12 clock instructions. The 5 clock instructions require three bus cycles, 7 clock

instructions require four bus cycles, and 12 clock instructions require six bus cycles. Thus,

the final value of the history pointer is changed according to the executed instruction. The

maximum final value of the execution time for only a 5 clock instruction is approximately

2700, while the execution time for a 12 clock instruction is about 1300. When a break

occurs before the history memory reaches the end, the last value of the history pointer is

reduced.

(6) The history memory receives new data until a break occurs. Old data is erased when

number of executed GO commands exceeds 2700.

(7) The top of the history pointer is 0. When the last value of <pointer 2> is set, the values are

displayed to the last value.

(8) When there are no history data (Before GO command, after GO command execution,

during T command execution, or during HAR command execution), the following

message is displayed:

* NO HISTORY DATA *

(9) The HB command can be used to view history data immediately prior to a break.

S1C62 FAMILY

DEVELOPMENT TOOL REFERENCE MANUAL