Epson S5U1C63000A - Manual (Page 128)

CHAPTER 7: DISASSEMBLER
114 EPSON S5U1C63000A MANUAL
(S1C63 FAMILY ASSEMBLER PACKAGE)
7.5 Disassembling Output
The data/code mnemonics are restored from the target code. As for the branch instructions, a label will
be automatically generated such as "CODEx:" where "x" denotes a hexadecimal number string. Other
reference symbols will also be generated as "LABELx", "IOx" and "RAMx". The ".org" pseudo-instruction
is used to specify the starting location of each code block.
The following shows examples of disassembled sources:
Sample outputs
Absolute list file "test.als"
Linker 63 ver x.xx Absolute list file "TEST.ALS" Mom Jan 15 12:40:41 2001
1: ; sub.s
2: ; AS63 test program (subroutine)
3:
4: .global RAM_BLK1
5:
6: ;***** RAM block 1 initialize *****
7:
8: .global INIT_RAM_BLK1
9: INIT_RAM_BLK1:
10: 0000 0800 ldb %ext,RAM_BLK1@h
11: 0001 0a04 ldb %xl,RAM_BLK1@l ;set RAM_BLK1 address to x
12: 0002 1e90 ld [%x]+,0x0
13: 0003 1e90 ld [%x]+,0x0
14: 0004 1e90 ld [%x]+,0x0
15: 0005 1e80 ld [%x],0x0 ;set 0x0000 to RAM_BLK1
16: 0006 1ff8 ret
17:
18: ;***** RAM block 1 increment *****
19:
20: .global INC_RAM_BLK1
21: INC_RAM_BLK1:
22: 0007 0800 ldb %ext,RAM_BLK1@h
23: 0008 0a04 ldb %xl,RAM_BLK1@l ;set RAM_BLK1 address to x
24: 0009 1911 add [%x]+,1
25: 000a 1990 adc [%x]+,0
26: 000b 1990 adc [%x]+,0
27: 000c 1980 adc [%x],0 ; increment 16bit value
28: 000d 1ff8 ret
29: ; main.s
30: ; AS63 test program (main routine)
31: ;
32:
33: ;***** INITIAL SP1 & SP2 ADDRESS DEFINITION *****
34:
35: #ifdef SMALL_RAM
36: .set SP1_INIT_ADDR 0xb ;SP1 init addr = 0x2c
37: #else
38: .set SP1_INIT_ADDR 0x4b ;SP1 init addr = 0x12c
39: #endif
40:
41: .set SP2_INIT_ADDR 0x1f ;SP2 init addr = 0x1f
42:
43:
44: ;***** NMI & BOOT, LOOP *****
45:
46: .global INIT_RAM_BLK1 ; subroutine in sub.s
47: .global INC_RAM_BLK1 ; subroutine in sub.s
48:
49: .org 0x100
50: NMI:
51: 0100 08fe (+) ldb ext,fe
52: 0101 02fe calr INIT_RAM_BLK1 ; initialize RAM block 1
53: 0102 1ff9 reti ; in NMI(watchdog timer)
54: