Specifications

Table Of Contents
S1C62740 TECHNICAL SOFTWARE EPSON II-11
CHAPTER 5: INITIAL RESET
5.2 Example Program for the System
Initialization
Following program shows the example of the procedure for system
initialization.
Label Mnemonic/operand Comment
;*
;* INITIAL RESET PROGRAM
;*
;
ORG 100H
;
JP INIT
;
ORG 110H
;
INIT:
;* INITIALIZE CPU CORE AT THE BEGINNING
;
RST F,0000B ;CLEAR IDZC FLAGS
;
LD A,08H ;SET STACK POINTER TO 080H
LD SPH,A
LD A,00H
LD SPL,A
;
;* CLEAR DATA MEMORY
;
CLR: LD A,0 ;CLEAR PAGE 0 AND 1
LD XP,A
LD A,1
LD YP,A
LD X,00H
LD Y,00H
CLR1: LBPX MX,0H ;CLEAR RAMS
LDPY MY,0H
LDPY MY,0H
CP XH,08H ;CONTINUE TILL 080H
JP C,CLR1
;
LD A,2 ;CLEAR PAGE 2 AND 3
LD XP,A
LD A,3
LD YP,A
LD X,00H
LD Y,00H
CLR2: LBPX MX,0H ;CLEAR RAMS