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Copy pathLB5.asm
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193 lines (163 loc) · 2.18 KB
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Copy pathLB5.asm
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193 lines (163 loc) · 2.18 KB
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model SMALL
dataseg
NUM1_MAX_LEN db 11
NUM1_LEN db 0
NUM1_STR db 11 dup(?)
NUM1_BCD db 5 dup(33)
NUM2_MAX_LEN db 11
NUM2_LEN db 0
NUM2_STR db 11 dup(?)
NUM2_BCD db 5 dup(33)
ENTER_STR_1 db 0Dh, 0Ah, 'い･､ｨ筵 遞皚ｮ 1 (ｭ･ ｡ｮｫ･･ 10 讓萵): $'
ENTER_STR_2 db 0Dh, 0Ah, 'い･､ｨ筵 遞皚ｮ 2 (ｭ･ ｡ｮｫ･･ 10 讓萵): $'
ST_OUT_STR db 0Dh,0Ah, '是ｧ罩�: '
ST_OUT_SIGN db '+'
OUT_STR db 10 dup(0), 0Dh, 0Ah, '$'
codeseg
startupcode
mov AX, @DATA
mov ES, AX
mov DS, AX
mov CX, 0
std
E1:
mov CX, 5
lea DI, [NUM1_BCD + 4]
mov AL, 0
rep stosb
lea DX, ENTER_STR_1
mov AH, 09h
int 21h
lea DX, NUM1_MAX_LEN
mov AH, 0Ah
int 21h
mov CL, [NUM1_LEN]
lea DI, [NUM1_STR]
add DI, CX
dec DI
mov AL, ' '
repz scasb
inc DI
mov CX, DI
sub CX, offset [NUM1_STR]
inc CX
mov SI, DI
lea DI, [NUM1_BCD + 4]
mov DX, 0
toBCD1_1:
lodsb
sub AL, '0'
cmp AL, 10
jae E1
test DX, 1
jnz toBCD1_high
mov [DI], AL
jmp toBCD1_check
toBCD1_high:
shl AL, 4
or [DI], AL
dec DI
toBCD1_check:
inc DX
cmp byte ptr [SI], ' '
loopnz toBCD1_1
inc CX
mov DI, SI
mov AL, ' '
repz scasb
jcxz $+4
jmp E1
E2:
mov CX, 5
lea DI, [NUM2_BCD + 4]
mov AL, 0
rep stosb
lea DX, ENTER_STR_2
mov AH, 09h
int 21h
lea DX, NUM2_MAX_LEN
mov AH, 0Ah
int 21h
mov CL, [NUM2_LEN]
lea DI, [NUM2_STR]
add DI, CX
dec DI
mov AL, ' '
repz scasb
inc DI
mov CX, DI
sub CX, offset [NUM2_STR]
inc CX
mov SI, DI
lea DI, [NUM2_BCD + 4]
mov DX, 0
toBCD_2:
lodsb
sub AL, '0'
cmp AL, 10
jae E2
test DX, 1
jnz toBCD2_high
mov [DI], AL
jmp toBCD2_check
toBCD2_high:
shl AL, 4
or [DI], AL
dec DI
toBCD2_check:
inc DX
cmp byte ptr [SI], ' '
loopnz toBCD_2
inc CX
mov DI, SI
mov AL, ' '
repz scasb
jcxz $+4
jmp E2
mov CX, 5
lea SI, NUM1_BCD + 4
lea BX, NUM2_BCD + 4
lea DI, OUT_STR + 9
clc
SSTR:
lodsb
mov AH, [BX]
sbb AL, AH
das
stosb
dec bx
loop SSTR
jnc print
mov ST_OUT_SIGN, '-'
lea SI, OUT_STR + 9
lea DI, OUT_STR + 9
mov CX, 5
toNeg:
lodsb
mov AH, AL
mov AL, 099h
adc AL, 0
sub AL, AH
daa
stosb
loop toNeg
print:
cld
lea SI, OUT_STR + 5
lea DI, OUT_STR
mov CX, 5
toASCII:
lodsb
mov AH, AL
shr AH, 4
and AL, 0Fh
or AX, 03030h
mov [DI], AH
inc DI
stosb
loop toASCII
lea DX, ST_OUT_STR
mov AH, 09h
int 21h
exitcode 0
end