a question about 8086

[NTFS]

mov cs, 8086

Hi all

I want to know how can I put a segment in special address.
for example I want to write my program from address FF7FFh ( absolute address ) so the CS register equals FF00h and IP equals 07FFh ( FF00:07FF = FF7FF ).
I know that if I write a directive ORG before intructions I can set the IP, mean I can set IP but I do not know how set CS or how put my code segment in a special address in 1MB 8086 address area.

Please help.

Thanks in advance.

PS. I want to make a single board cpu and I don't want to use it for PC.

 

[cfant]

SEGMT SEGMENT
ASSUME CS:SEGMT, DS:SEGMT
ORG ff7ffh

should do it.

 

[NTFS]

it does not work

 

[alwaly]

I thinks this should work: using the A86 Assembler:


MOV BX, FF00

MOV IP, 007F

MOV CS, BX , Loads the value 00FF into CS register

CodeSeg SEGMENT ‘CODE’ , creates a code segment called CodSeg

ASSUME CS:CodeSeg , assigns CS as the base of that segment

Assembly instructions
.
.
.
CodeSeg ENDS , VERY IMPORTANT TO END THE SEGMENT!