Epson S5U1C63000A - Manual (Page 98)

CHAPTER 4: ASSEMBLER
84 EPSON S5U1C63000A MANUAL
(S1C63 FAMILY ASSEMBLER PACKAGE)
4.9 Sample Executions
Command line
C:\EPSON\S1C63\bin\as63 -g -e -l main.s
Assembly source file
; main.s
; AS63 test program (main routine)
;
;***** INITIAL SP1 & SP2 ADDRESS DEFINITION *****
#ifdef SMALL_RAM
.set SP1_INIT_ADDR 0xb ;SP1 init addr = 0x2c
#else
.set SP1_INIT_ADDR 0x4b ;SP1 init addr = 0x12c
#endif
.set SP2_INIT_ADDR 0x1f ;SP2 init addr = 0x1f
;***** NMI & BOOT, LOOP *****
.global INIT_RAM_BLK1 ; subroutine in sub.s
.global INC_RAM_BLK1 ; subroutine in sub.s
.org 0x100
NMI:
calr INIT_RAM_BLK1 ; initialize RAM block 1
reti ; in NMI(watchdog timer)
.org 0x110
BOOT:
ldb %ba,SP1_INIT_ADDR
ldb %sp1,%ba ; set SP1
ldb %ba,SP2_INIT_ADDR
ldb %sp2,%ba ; set SP2
calr INIT_RAM_BLK1 ; initialize RAM block 1
LOOP:
calr INC_RAM_BLK1 ; increment RAM block 1
jr LOOP ; infinity loop
;***** RAM block *****
.org 0x0
.bss
.comm RAM_BLK0, 4
.comm RAM_BLK1, 4