[Assembler] Labels werden nicht erkannt

[Guybrush Threepwood]

Hi,

ich hab mir bei Programmersheaven den MicroAsm v1.0 runtergeladen

und versucht ein Programm von mir zu Compilieren.

Dabei hab ich ein paar Sprungadressen in Labels geändert, und zwar so

wie in der dzugehörigen Hilfe gezeigt wird.

Trotzdem bekomme ich immer den Fehler "Jump out of Range", habt ihr ne Ahnung warum?

Hier mal der Code:

#make_COM#


; COM file is loaded at CS:0100h

ORG 100h


MOV     AH,01

INT     21

MOV     BL,AL

MOV     AH,07

INT     21

MOV     BH,AL

CMP     BH,0D

JNZ     label1    //Jump out of Range

MOV     BH,30

XCHG    BL,BH

label1:

PUSH    BX

MOV     BH,00

MOV     AH,03

INT     10

MOV     DL,00

MOV     AH,02

INT     10

POP     BX

MOV     DL,BL

MOV     AH,02

INT     21

MOV     DL,BH

INT     21

MOV     DL,2D

INT     21

MOV     [0300],BL

MOV     [0302],BH

MOV     AH,01

INT     21

MOV     BL,AL

MOV     AH,07

INT     21

MOV     BH,AL

CMP     BH,0D

JNZ     label2   //Jump out of Range

MOV     BH,30

XCHG    BL,BH

label2:

PUSH    BX

MOV     AH,03

MOV     BH,00

INT     10

MOV     AH,02

MOV     DL,03

INT     10

POP     BX

MOV     DL,BL

MOV     AH,02

INT     21

MOV     DL,BH

INT     21

MOV     DL,3D

INT     21

MOV     [0304],BL

MOV     [0306],BH

MOV     CL,00

MOV     AL,[0306]

SUB     AL,30

MOV     [0308],AL

MOV     AL,[0302]

SUB     AL,[0308]

CMP     AL,30

JNB     label3   //Jump out of Range

ADD     AL,0A

MOV     CL,01

label3:

MOV     [0310],AL

MOV     AL,[0304]

SUB     AL,30

MOV     [0314],AL

MOV     AL,[0300]

SUB     AL,[0314]

SUB     AL,CL

MOV     [0312],AL

MOV     DL,[0312]

MOV     AH,02

INT     21

MOV     DL,[0310]

INT     21

MOV     AH,07

INT     21

INT     20

[/PHP]

Gruß

Guybrush

[striper]

hi,

du musst einen NEAR jump und keinen SHORT jump verwenden

hab dazu was für dich ausgegegraben:

any conditional jump (JA, JB, JE, JZ, JS, JP, JCXZ, JC, JO, and their

negative equivalents (JNA, JNB, JNAE, JAE, etc.) all have a range of

+127 to -128 of the statement itself. This 1-byte offset jump is called

a SHORT jump. I don't know which compiler you are using but on the 386

you can use an alternate form called the NEAR conditional jump which has

a range of anywhere in the current segment. Usually a JB NEAR <address>

should work. well, it does in NASM :-). maybe .386 may work for you.

if you can't use that/must write for 80286 and below, you can use a

skip construct:

JE OutOfRange

becomes:

JNE Skip1 'the OPPOSITe. JE -> JNE, JC -> JNC, JNA -> JA, etc.

JMP OutOfRange

.Skip1:

because JMP is a NEAR jump (anywhere in the segment). a FAR jump can

only be done using JMPs or CALLs (not a conditional jump) and can jump

anywhere- includes a segment and an offset.

Viel Spass

Striper

[Guybrush Threepwood]

Usually a JB NEAR <address> should work

Damit bekomme ich die Meldung "Unbekanntes Label JNZ NEAR label1":confused:

[striper]

hast du 368+ Instructions eigeschalten?

####################################

Short jumps can only jump +-128 bytes. To fix this, use

JUMPS

or

.386

or

je Label

change to

jne There

jmp Label

There:

or if you use ".386" or better, you can also

use the "/m#" command line switch to allow multiple

passes

TASM /m9 File.ASM

and TASM will optimize all JMP/Jcc to the smallest

opcode possible.

####################################

ich quote mich mal selber:

Original geschrieben von striper

if you can't use that/must write for 80286 and below, you can use a

skip construct:

JE OutOfRange

becomes:

JNE Skip1 'the OPPOSITe. JE -> JNE, JC -> JNC, JNA -> JA, etc.

JMP OutOfRange

.Skip1:

Striper

dann versuch doch den Skip

Striper