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Title: What does the error mean?
Post by: leetow2003 on December 29, 2010, 12:39:31 PM

I compile my 80386 codes,but it displays many errors:
error A2015:Symbol already different kind: @CURSEG
my codes have not the Symbol @CURSEG,
I want to know What the error means?
And how to correct it?
which file explains these errors and solve it?
I use compiler masm5.1(it includes masm.exe,link.exe,lib.exe,cref.exe),
Thanks.

Title: Re: What does the error mean?
Post by: Gunther on December 29, 2010, 01:12:06 PM

You should provide the code here, so we can inspect it.

Gunther

Title: Re: What does the error mean?
Post by: sinsi on December 29, 2010, 01:38:03 PM

Don't use masm 5.1, there was a big change between versions 5 and 6.

Title: Re: What does the error mean?
Post by: dedndave on December 29, 2010, 01:47:19 PM

suddenly, i don't feel so old - lol
nice to know someone else has 5.1 :P

if you install the masm32 package, it comes with 6.14
there are several newer versions of masm that may be acquired in different ways
no matter which version you wind up with, you will probably want the masm32 package :U

Title: Re: What does the error mean?
Post by: FORTRANS on December 29, 2010, 02:41:51 PM

Hi,

As sinsi says, many programs that assemble with MASM 5.1
or earlier will have errors with MASM 6.0 or later. And of course
as the later versions of MASM added features, many programs
written for MASM 6+ won't work with older versions of MASM.
And segment usage is a feature that changed some defaults
between versions.

If you install MASM32 you will need to use LINK16 for DOS
programs.

HTH,

Steve N.

Title: Re: What does the error mean?
Post by: dedndave on December 29, 2010, 03:13:11 PM

yes - now, that you mention it...
i recall seeing some OPTION directives in the masm 6 manual for assembling older programs

Title: Re: What does the error mean?
Post by: MichaelW on December 29, 2010, 07:52:25 PM

Yes, like OPTION M510.

Title: Re: What does the error mean?
Post by: leetow2003 on December 30, 2010, 03:50:16 AM

Quote from: Gunther on December 29, 2010, 01:12:06 PM
You should provide the code here, so we can inspect it.

Gunther

The lines of two files are more than 300,and the code description is not written by english,so I delete these description,look:

;FileName:386SCD.ASM

DESCRIPTOR STRUC
LIMITL DW 0
BASEL DW 0
BASEM DB 0
ATTRIBUTES DW 0
BASEH DB 0
DESCRIPTOR ENDS
;-------------------------------------------------------
GATE STRUC
OFFSETL DW 0
SELECTOR DW 0
DCOUNT DB 0
GTYPE DB 0
OFFSETH DW 0
GATE ENDS
;--------------------------------------------------------
PDESC STRUC
LIMIT DW 0
BASE DD 0
PDESC ends
;-----------------------------------------------------------
TASKSS STRUC
TRLINK DW ?,0

TRESP0 DD ?
TRSS0 DW ?,0
TRESP1 DD ?
TRSS1 DW ?,0
TRESP2 DD ?
TRSS2 DW ?,0
TRCR3 DD ? ;CR3
TREIP DD ? ;EIP
TREFLAG DW ?,? ;EFLAGS

TREAX DD ? ;EAX
TRECX DD ? ;ECX
TREDX DD ? ;EDX
TREBX DD ? ;EBX
TRESP DD ? ;ESP
TREBP DD ? ;EBP
TRESI DD ? ;ESI
TREDI DD ? ;EDI
TRES DW ?,0 ;ES
TRCS DW ?,0 ;CS
TRSS DW ?,0 ;SS
TRDS DW ?,0 ;DS
TRFS DW ?,0 ;FG
TRGS DW ?,0 ;GS

TRLDT DW ?,0 ;LDT

TRFLAG DW 0
TRIOMAP DW $+2
TASKSS ENDS
;--------------------------------------------------------------
ATDR = 90H
ATDW = 92H
ATDWA = 93H
ATCE = 98H
ATCER = 9AH
ATCCO = 9CH
ATCCOR = 9EH
;
ATLDT = 82H
ATTASKGAT = 85H
AT386TSS = 89H
AT386CGAT = 8CH
AT386IGAT = 8EH
AT386TGAT = 8FH
;------------------------------------------------------------------
;
DPL1 = 20H ;DPL=1
DPL2 = 40H ;DPL=2
DPL3 = 60H ;DPL=3
RPL1 = 01H ;RPL=1
RPL2 = 02H ;RPL=2
RPL3 = 03H ;RPL=3
IOPL1 = 1000H ;IOPL=1
IOPL2 = 2000H ;IOPL=2
IOPL3 = 3000H ;IOPL=3
;-------------------------------------------------------
;
D32 = 4000H
TIL = 04H
VMFL = 0002H
IFL = 0200H
;-----------------------------------------------
;
JUMP32 MACRO selector, offsetv
DB 0EAH
DW offsetv
DW 0
DW selector
ENDM
;-----------------------------------------------
;
CALL32 MACRO selector, offsetv
DB 9AH
DW offsetv
DW 0
DW selector
ENDM
;----------------------------------------------
;
JUMP16 MACRO selector, offsetv
DB 0EAH
DW offsetv
DW selector
ENDM
;---------------------------------------------
;
CALL16 MACRO selector, offsetv
DB 9AH
DW offsetv
DW selector
ENDM

;FileName:T10.ASM

INCLUDE 386SCD.ASM

.386P
;-------------------------------------------

GDTSEG SEGMENT PARA USE16 'GDT'
GDT LABEL BYTE
DUMMY DESCRIPTOR <>
;
NORMAL DESCRIPTOR <0FFFFH,0,0,ATDW,0>
NORMAL_SEL = NORMAL - GDT
;
CODEK DESCRIPTOR <0FFFFH,,,ATCE,>
CODEK_SEL = CODEK - GDT
;
LDTABLE DESCRIPTOR <LDTLEN-1,,,ATLDT,>
LDT_SEL = LDTABLE - GDT
GDTLEN = $ - GDT ;;;;;;;;;;;;;;
GDTSEG ENDS
;------------------------------------------------

LDTSEG SEGMENT PARA USE16 'LDT'
LDT LABEL BYTECODEL
;
CODEL DESCRIPTOR <CODELLEN-1,SEG CODELSEG,,ATCE,>
CODEL_SEL = (CODEL-LDT) + TIL
;
CODEC DESCRIPTOR <CODECLEN-1,SEG CODECSEG,,ATCE,>
CODEC_SEL = (CODEC-LDT) + TIL
;
VIDEOBUFF DESCRIPTOR <0FFFFH,0,0,0F00H+ATDW,0>
VIDEO_SEL = (VIDEOBUFF-LDT) + TIL
;
TOLDT DESCRIPTOR <LDTLEN-1,LDTSEG,,ATDR+DPL3,>
TOLDT_SEL = (TOLDT-LDT) + TIL
;
MDATA DESCRIPTOR <MDATALEN-1,SEG MDATASEG,,ATDW+DPL3,>
MDATA_SEL = (MDATA-LDT) + TIL + RPL3
;
STACKS DESCRIPTOR <TOPOFS-1,SEG STACKSEG,,ATDWA,>
STACK_SEL = (STACKS-LDT) + TIL
LDNUM = ($-LDT) / (SIZE DESCRIPTOR)
LDTLEN = $ - LDT
LDTSEG ENDS
;--------------------------------------------
;
MDATASEG SEGMENT PARA USE16 'MDATA'
MESSAGE DB 'Value=',0
BUFFER db 80 dup (0)
MDATALEN = $ - MDATASEG
MDATASEG ENDS
;--------------------------------------------
;
STACKSEG SEGMENT PARA USE16 'STACK'
DW 512 DUP (0)
TOPOFS = $ - STACKSEG
STACKSEG ENDS
;--------------------------------------------
;
CODECSEG SEGMENT PARA USE16 'CODEC'
ASSUME CS:CODECSEG

DISPMESS PROC FAR

MOV AH,7
DISP1:MOV AL,FS:[SI]
INC SI
OR AL,AL
JZ DISP2
MOV ES:[EDI],AX
INC EDI
INC EDI
JMP DISP1
DISP2:RET
DISPMESS endp
;
;
HTOASC PROC FAR
AND AL,0FH
ADD AL,90H
DAA
ADC AL,40H
DAA
ret
HTOASC endpCODECLEN = $ - CODECSEG
CODECSEG ENDS
;----------------------------------------------
;
CODELSEG SEGMENT PARA USE16 'CODEL'
ASSUME CS:CODELSEG
VIRTUAL2:
MOV AX,VIDEO_SEL
MOV ES,AX
MOV EDI,0B8000H
;
MOV AX,MDATA_SEL
MOV FS,AX
MOV SI,OFFSET MESSAGE
;
CALL16 CODEC_SEL,DISPMESS
;
MOV AX,TOLDT_SEL
MOV GS,AX
;
MOV DX,GS:[CODEL.LIMITL]
MOV SI,OFFSET BUFFER
MOV CX,4
VIR:ROL DX,4
MOV AL,DL
CALL16 CODEC_SEL,HTOASC
MOV FS:[SI],AL
INC SI
LOOP VIR
MOV WORD PTR FS:[SI],'H'
;
MOV SI,OFFSET BUFFER
CALL16 CODEC_SEL,DISPMESS
;
JUMP16 CODEK_SEL,VIRTUAL3
CODELLEN = $ - CODELSEG
CODELSEG ENDS
;-----------------------------------------------------
;
CODEKSEG SEGMENT PARA USE16 'CODEK'
ASSUME CS:CODEKSEG
VIRTUAL1:
MOV AX,LDT_SEL
LLDT AX
;
MOV AX,STACK_SEL
MOV SS,AX
MOV SP,OFFSET TOPOFS
;
JUMP16 CODEL_SEL,VIRTUAL2
VIRTUAL3:
MOV AX,NORMAL_SEL
MOV ES,AX
MOV FS,AX
MOV GS,AX
MOV SS,AX
;
MOV EAX,CR0
AND EAX,0FFFFFFFEH
MOV CR0,EAX
JUMP16 <SEG REAL>,<OFFSET REAL>
CODEKLEN = $ - CODEKSEG
CODEKSEG ENDS
;=======================================================
;
RDATASEG SEGMENT PARA USE16
VGDTR PDESC <GDTLEN-1,>
SPVAR DW ?
SSVAR DW ?
RDATASEG ENDS
;------------------------------
;
RECODESEG SEGMENT PARA USE16
ASSUME CS:RECODESEG
START: jmp $
ASSUME DS:GDTSEG
MOV AX,GDTSEG
MOV DS,AX
;
MOV BX,16
MOV AX,CODEKSEG
MUL BX
MOV CODEK.BASEL,AX
MOV CODEK.BASEM,DL
MOV CODEK.BASEH,DH
MOV AX,LDTSEG
MUL BX
MOV LDTABLE.BASEL,AX
MOV LDTABLE.BASEM,DL
MOV LDTABLE.BASEH,DH
;
ASSUME DS:RDATASEG
MOV AX,RDATASEG
MOV DS,AX
MOV AX,GDTSEG
MUL BX
MOV WORD PTR VGDTR.BASE,AX
MOV WORD PTR VGDTR.BASE+2,DX
;
CLD
CALL INIT_MLDT
;
MOV SSVAR,SS
MOV SPVAR,SP
;
LGDT FWORD PTR VGDTR
CLI
;
MOV EAX,CR0
OR EAX,1
MOV CR0,EAX
JUMP16 <CODEK_SEL>,<OFFSET VIRTUAL1>
REAL:
LSS SP,DWORD PTR SPVAR
STI
MOV AX,4C00H
INT 21H
;-----------------------------------------
;
INIT_MLDT PROC
PUSH DS
MOV AX,LDTSEG
MOV DS,AX
MOV CX,LDNUM
MOV SI,OFFSET LDT ;CODEL(SI=0)
INITL:MOV AX,[SI].BASEL
MOVZX EAX,AX
SHL EAX,4
SHLD EDX,EAX,16
MOV [SI].BASEL,AX
MOV [SI].BASEM,DL
MOV [SI].BASEH,DH
ADD SI,SIZE DESCRIPTOR ;
LOOP INITL
POP DS
ret
INIT_MLDT endp
RECODESEG ENDS
END START

Title: Re: What does the error mean?
Post by: dedndave on December 30, 2010, 04:13:17 AM

see attached...

Title: Re: What does the error mean?
Post by: leetow2003 on December 31, 2010, 04:38:28 AM

Quote from: dedndave on December 30, 2010, 04:13:17 AM
see attached...

Thank you very much.
I download your files,and I compile it,the first I compile it using masm5.1,but it display some error,such as
error A2015: Symbol already different kind: GDT,
and the second I compile it using tasm3.1,but it don't display any error, why?

Title: Re: What does the error mean?
Post by: dedndave on December 31, 2010, 06:41:52 AM

i assembled it using masm v 6.15
i had to make a few changes in your source file - syntax/typos
as for the error, it may be a reserved keyword or something

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Miscellaneous Forums => 16 bit DOS Programming => Topic started by: leetow2003 on December 29, 2010, 12:39:31 PM