Initialize Program Example - Epson E0C6001 Technical Manual

2.2

Initialize Program Example

The following is a program that clears the RAM and LCD,
resets the flags, registers and timer, and sets the stack
pointer immediately after resetting the system.
Label Mnemonic/operand
ORG
JP
;
ORG
INIT RST
;
LD
RAMCLR LDPX
CP
JP
LD
LCDCLR LDPX
CP
JP
;
LD
LD
LD
LD
;
LD
OR
;
LD
OR
;
LD
OR
;
LD
LD
LD
LD
RST
EI
Comment
100H
INIT ; Jump to "INIT"
110H
F,0011B ;
Interrupt mask, decimal
; adjustment off
X,0 ;
MX,0 ;
XH,5H ;
NZ,RAMCLR ;
X,90H ;
MX,0 ;
XH,0BH ;
NZ,LCDCLR ;
A,0 ;
B,4 ;
SPL,A ;
SPH,B ;
X,0F9H ;
MX,0100B ;
X,0EBH ;
MX,0111B ;
X,0E8H ;
MX,1111B ;
X,0 ;
Y,0 ;
A,0 ;
B,0 ;
F,0 ;
; Enable interrupt
CHAPTER 2: INITIAL RESET
Clear RAM (00H–4FH)
Clear LCD (90H–AFH)
Set stack pointer to 40H
Reset timer
Enable timer interrupt
Enable input interrupt
(K03–K00)
Reset register flags
II-11